List of the Cenozoic life of California

• †Abantis • †Abantis velifer • Abies • †Abies concoloroides • †Abies klamathensis • †Aboma • †Aboma antiqua – type locality for species • †Acalypha • †Acalypha aequalis • Acanthina • †Acanthina spirata • Acanthocardia • †Acanthocardia brewerii – type locality for species • †Acanthocardia sorrentoense • Acar • †Acar bailyi – or unidentified comparable form • Accipiter • †Accipiter velox • Acentrophryne • †Acentrophryne longidens • Acer • †Acer aequidentatum • †Acer scottiae • Acesta • †Acesta multiradiata • †Achaenodon • †Achaenodon robustus – or unidentified comparable form • Acila • †Acila castrensis • †Acila conradi • †Acila decisa • †Acila gabbiana • †Acila muta • †Acila semirostrata – or unidentified comparable form • †Acila shumardi • Acipenser • , or green sturgeon †Acipenser medirostris'' – or unidentified comparable form • Acmaea • †Acmaea dickersoni – or unidentified related form • †Acmaea digitalis – or unidentified comparable form • †Acmaea insessa • †Acmaea limatula • †Acmaea mitra • †Acmaea persona • †Acmaea ruckmani – or unidentified comparable form • †Acmaea tejonensis – or unidentified comparable form • †Acritohippus'' • †Acritohippus isonesus – or unidentified comparable form • †Acritohippus quinni – type locality for species • †Acritohippus stylodontus • †Acritohippus tertius – or unidentified comparable form • †Acritoparamys – or unidentified comparable form • Acteocina • †Acteocina culcitella • †Acteocina inculta • †Acteocina magdalensis • Acteon • †Acteon boulderanus • †Acteon lawsoni • †Acteon punctocaelatus • †Acteon traski • Actinemys • , or western pond turtle †Actinemys marmorata'' • †Acutostrea • †Acutostrea idriaensis • †Acutostrea miguelensis • Admete • †Admete rhyssa • Adula • †Adula californiensis • †Adula diegensis • Aechmophorus • †Aechmophorus elasson • †Aechmophorus occidentalis • †Aechomophorus • †Aechomophorus occidentalis • †Aeila • †Aeila decisa • †Aelurodon • †Aelurodon asthenostylus • †Aelurodon taxoides • , or the long-necked camel. Heinrich Harder (1920). †Aepycamelus'' • †Aepycamelus alexandrae • Aequipecten • †Aequipecten andersoni • Aesopus • †Aesopus chrysalloides • Aethia • †Aethia barnesi – type locality for species • †Aethia rossmoori – type locality for species • †Aethomylos • †Aethomylos simplicidens • Agaronia • †Agaronia mathewsoni – or unidentified comparable form • †Agaronia mathewsonii – or unidentified comparable form • †Agasoma • †Agasoma acuminatum • †Agasoma gravida • †Agasoma gravidum • †Agasoma kerrianum • †Agasoma sinuata • Agelaius • †Agelaius phoeniceuus • †Agriotherium'' • †Ailanthus • †Ailanthus lesquereuxi • Akera • †Akera maga • Alaba • †Alaba catalinensis • †Alaba jeannettae • Alabina • †Alabina io – or unidentified comparable form • †Alabina tenuisculpta • †Albicetus • †Albicetus oxymycterus – type locality for species • †Albireo • †Albireo savagei – type locality for species • Alca • †Alcodes • †Alcodes ulnulus – type locality for species • Aleochara • Aletes • †Aletes squamigerus • †Aletomeryx'' • †Aletomeryx occidentalis – type locality for species • †Alforjas • Aligena • †Aligena cerritensis • †Alilepus • †Alilepus hibbardi • †Alisea – type locality for genus • †Alisea grandis – type locality for species • †Allodelphis – type locality for genus • †Allodelphis pratti – type locality for species • †Allodelphis woodburnei – type locality for species • Allodesmus †Allodesmus • †Allodesmus gracilis – type locality for species • †Allodesmus kelloggi – type locality for species • †Allodesmus kernensis • †Alluvisorex • †Alluvisorex chasseae – type locality for species • Alnus • †Alnus corrallina • †Alnus operia • †Alopecocyon – type locality for genus • †Alopecocyon leardi – type locality for species • Alopias • †Alopias exigua – or unidentified comparable form • †Alopias latidens • , or common thresher †Alopias vulpinus'' – or unidentified comparable form • Alvania • †Alvania acutelirata • †Alvania compacta • †Alvania iliuliukensis – or unidentified related form • †Alveojunctus • †Alveojunctus bowni – type locality for species • Amaea • Amara • †Amara insignis • †Amaurellina • †Amaurellina caleocia • †Amaurellina martinezensis • †Amaurellina moragai • Amauropsis • †Amauropsis alveata • , or shadbush Amelanchier'' • Amiantis • †Amiantis – type locality for species informal • †Amiantis callosa • †Amiantis diabloensis • †Amiantis mathewsoni • Ammobaculites • †Ammobaculites cubensis • †Ammobaculites strathearnensis – type locality for species • Ammospermophilus • †Ammospermophilus fossilis • †Amorpha • †Amorpha condonii • †Amorpha oklahomensis • †Amphicyon • †Amphicyon ingens • †Amphimachairodus'' • †Amphimachairodus coloradensis – or unidentified comparable form • Amphimorphina • †Amphimorphina ignota • Amphissa • †Amphissa columbiana • †Amphissa reticulata • †Amphissa ventricosa • †Amphissa versicolor • Amphiura • †Amphiura santaecrucis • †Amphora • †Amphora ovalis • †Amphora perpusilla • †Ampullina • †Ampullina schencki – or unidentified comparable form • Amusium • †Amusium lompocensis • †Amussiopecten • †Amussiopecten vanvlecki • †Amynodon • †Amynodon advenus – or unidentified comparable form • †Amynodon reedi • †Amynodontopsis • †Amynodontopsis bodei – type locality for species • Anachis • †Anachis coronata • marine ark clams Anadara'' • †Anadara devincta • †Anadara obispoana • †Anadara osmonti • †Anadara perlabiata • †Anadara reinharti • †Anadara rivulata • †Anadara santana – type locality for species • †Anadara submontereyana • †Anadara trilineata • Anaphothrips • †Anaphothrips vitreus – type locality for species • Anas • †Anas americana • †Anas carolinense • †Anas clypeata • †Anas platyrhynchos • †Anchitheriomys – or unidentified comparable form • (left) †Anchitherium'' • †Anchitherium clarencei • †Anchura • †Anchura baptos • Ancilla • †Ancilla fishii • †Ancilla gabbi – tentative report • †Angelosquilla • †Angelosquilla altamirensis • Angulogerina • Angulus • †Angulus buttoni • †Angulus castacana • †Angulus joaquinensis • †Angulus jollaensis – or unidentified comparable form • †Angulus longa • †Angulus lutea – or unidentified comparable form • Anniella • Anodontia • †Anodontia edentuloides • †Anodontia inflata • †Anomalina • †Anomalina californiensis • †Anomalina garzaensis • Anomalinoides • †Anomalinoides globosa – or unidentified comparable form • Anomia • †Anomia mcgoniglensis • †Anomia peruviana • †Anomia vaquerosensis – type locality for species • †Ansen • †Ansen albifrons • Anser • †Anser albifrons • †Antecalomys • †Antecalomys valensis • †Antecalomys vasquezi • †Antiacodon • †Antiacodon venustus • Antigona • †Antigona undosa • †Antilla • †Antilla batequensis • , or pronghorn Antilocapra'' • Antrozous • †Antrozous pallidus • †Anzanycteris • †Anzanycteris anzensis • †Apataelurus – or unidentified comparable form • †Apatemys • †Apatemys bellus • †Apatemys downsi – type locality for species • †Apatemys uintensis • Aphelocoma • †Aphelocoma californica • †Aphelophlebodes – type locality for genus • †Aphelophlebodes stocki – type locality for species • †Aphelops'' • †Aphelops megalodus • Apiotoma • †Apiotoma californiana • Aplodontia • †Aplodontia rufa • Aprionodon • Apsena • †Apsena laticornis – type locality for species • †Apsena pubescens • †Apsena rufipes • Aquila • , or golden eagle Aquila chrysaetos'' • †Araeosteus • †Araeosteus rothi • Arbutus • †Arbutus matthesii • Arca • †Arca hornii – type locality for species • †Arca montereyana • †Arca pacifica – or unidentified comparable form • †Arca santaclarana • †Arca sisquocensis • †Arca terminumbonis • †Arceuthobium • †Archaeocyon'' • †Archaeocyon pavidus • †Archaeohippus • †Archaeohippus mourningi • †Archaeohippus ultimus • †Archaeolagus • †Archaeolagus acaricolus – type locality for species • †Archaeolithothamnion • †Archaeolithothamnion keenanii – or unidentified related form • Archaeolithothamnium • †Archaeolithothamnium keenani – type locality for species • †Archaeoparadoxia • †Archaeoparadoxia weltoni – type locality for species • †Archibuteo • †Archibuteo ferrugineus • staircase shell sea snail Architectonica'' • †Architectonica cognata • †Architectonica llajasensis – type locality for species • †Architectonica nobilis • †Architectonica tuberculata • †Architectonica ullreyana – or unidentified comparable form • †Archoheia – tentative report • Archoplites • †Archoplites interruptus • Arcinella • †Arcinella californica • Arctica – tentative report • †Arctica weaveri • Arctocephalus • , or short-faced bear, with a human to scale †Arctodus'' • †Arctodus simus – type locality for species • †Arctostaphylos • Ardea • †Ardea herodias • Arenaria • †Arenaria melanocephala • Arene • †Arene mcleani – type locality for species • †Argenna • †Argenna fossilis – type locality for species • Argobuccinum • †Argobuccinum katherineae – type locality for species • †Argobuccinum oregonensis • Argopecten • †Argopecten deserti • †Argopecten gibbus • †Argopecten mendenhalli • †Argopecten purpuratus • †Argopecten ventricosus • †Argyrocetus – type locality for genus • †Argyrocetus bakersfieldensis – type locality for species • †Argyrocetus joaquinensis – type locality for species • silver hatchetfish Argyropelecus'' • †Argyropelecus bullocki – type locality for species • †Argyropelecus bullockii • †Arnoldina – type locality for genus • †Arnoldina iniistia – type locality for species • Arossia • †Artocarpus • †Artocarpus lessigiana • †Asclepiadites • †Asclepiadites laterita – type locality for species • , or long-eared owl Asio'' • †Asio priscus • †Asio wilsonianus • Asterigerina • †Asterigerina crassaformis • Astraea • †Astraea biangulata – or unidentified comparable form • †Astraea gibbosa • †Astraea gradata • †Astraea morani – type locality for species • †Astraea undosa • Astrangia • †Astrangia grandis – type locality for species • †Astrangia insignifica – type locality for species • †Astrocoenia – tentative report • †Astrocoenta • †Astrodapsis • †Astrodapsis arnoldi – or unidentified comparable form • †Astrodapsis cuyamanus • †Astrodapsis fernandoensis • †Astrodapsis merriami – tentative report • †Astrodapsis spatiosus • †Astrodaspis • †Astrodaspis arnoldi • Astropecten • Astyris • †Astyris gausapata • Athene • †Athene cunicularia • Athleta • †Athleta roddai – type locality for species • †Atocetus'' • †Atocetus nasalis – type locality for species • †Atopotarus – type locality for genus • †Atopotarus courseni – type locality for species • Atrina • †Atrina alamedensis • †Aturia • †Aturia angustata • †Aturia dickersoni – type locality for species • †Aturia kerniana – type locality for species • †Aturia myrlae – type locality for species • †Aturoidea • †Aturoidea mathewsonii – type locality for species • Atys • †Aulophyseter'' – type locality for genus • †Aulophyseter morricei – type locality for species • Austrotrophon • †Auxides • †Auxides sanctaemonicae • †Avipeda • Aythya • †Aythya affinis • †Aythya valisineria • †Azalois – type locality for genus • †Azalois angelensis – type locality for species ==B==

• Baiomys • †Baiomys mowi • Balaenoptera • †Balaenoptera bertae – type locality for species • †Balaenoptera cortesi • †Balaenoptera davidsonii – type locality for species • †Balaenoptera physalus • †Balaenoptera ryani • †Balaenula'' • Balanophyllia • †Balanophyllia elegans • †Balanophyllia variabilis – type locality for species • Balanus • †Balanus crenatus • †Balanus gregarius • †Balanus nubilus – or unidentified comparable form • †Balanus rostratus • Balcis • †Balcis micans • †Balcis monicensis • †Balcis oldroydi • †Balcis rutila • †Balcis thersites • Bankia • †Bankia setacea – or unidentified comparable form • Barbarofusus • †Barbarofusus barbarensis • Barbatia • †Barbatia cliffensis • †Barbatia landesi – or unidentified related form • †Barbatia strongi – type locality for species • †Barbatia suzzalloi – or unidentified comparable form • †Barbourofelis'' • †Barbourofelis loveorum • †Barbourofelis whitfordi • Barleeia • †Barleeia marmorea • Barnea • †Barnea costata • †Basirepomys • †Basirepomys pliocenicus – type locality for species • Bassariscus • †Bassariscus antiquus • †Bassariscus astutus – or unidentified comparable form • †Bassariscus casei • †Bassariscus raptor • †Bathylagus – type locality for genus • †Bathylagus quiescens – type locality for species • †Bathylagus quisquilia – type locality for species • †Bathysiphon • †Bathysiphon eocenica • †Bathysiphon sanctaecrucis • Bathytoma • †Bathytoma pacifica • †Batodonoides • †Batodonoides powayensis • †Batodonoides walshi – type locality for species • ground beetle Bembidion'' • †Bembidion davidae – type locality for species • †Bembidion everestae – type locality for species • †Benoistia • †Benoistia cantonensis • †Bensonomys • †Bensonomys arizonae • †Bensonomys gidleyi • †Bensonomys meadensis • Beringraja • †Beringraja binoculata – or unidentified comparable form • †Bestiopeda • Betula • †Betula ashleyii • †Bifarina • †Bifarina eleganta • Bison • †Bison antiquus • , or long-horned bison †Bison latifrons'' • Bittium • †Bittium alternatum – or unidentified comparable form • †Bittium asperum • †Bittium casmaliense • †Bittium catalinense • †Bittium dumblei • †Bittium eschrichti • †Bittium eschrichtii • †Bittium inerfossa • †Bittium interfossa • †Bittium latum • †Bittium ornatissimum • †Bittium rugatum • †Bittium topangensis • Bivetopsia • †Bivetopsia bullata • †Boavus • †Boavus affinis – type locality for species • Boetica • †Boetica hertleini • (bottom) †Bolbocara'' • †Bolbocara gyrinus • Bolinichthys • Bolivina • †Bolivina gracilis • Bonasa • †Bonasa umbellus • †Bonellitia • †Bonellitia paucivaricata • †Bonellitia stantoni • Bornia • †Bornia retifera • genus Borophagus preying on a camel. Jay Matternes (1964). †Borophagus • †Borophagus diversidens • †Borophagus littoralis – type locality for species • †Borophagus parvus • †Borophagus secundus • †Borophryne • †Borophryne apogon • †Bouromeryx • †Bouromeryx americanus • †Bouromeryx submilleri – or unidentified comparable form • Brachidontes • †Brachidontes cowlitzensis • †Brachidontes dichotomus • †Brachidontes lawsoni – or unidentified comparable form • †Brachidontes ornatus • Brachiodontes • †Brachiodontes lawsoni • †Brachisphingus • †Brachisphingus gabbi • †Brachyallodesmus – type locality for genus • †Brachyallodesmus packardi • †Brachycrus'' • †Brachycrus buwaldi • †Brachycrus laticeps • †Brachyerix • †Brachyerix incertis • †Brachypsalis • †Brachypsalis obliquidens • †Brachypsalis pachycephalus – or unidentified comparable form • Brachyramphus • †Brachyramphus dunkeli – type locality for species • †Brachyramphus pliocenum – type locality for species • †Brachysphingus • †Brachysphingus liratus • †Brachysphingus mammilatus – type locality for species • †Brachysphingus sinuatus • , or black brant Branta'' • †Branta canadensis • †Branta nigricans – tentative report • †Branta woolfendeni – or unidentified comparable form • †Bretzia • †Brevirostrodelphis – Type locality for genus • †Brevirostrodelphis dividum - Type locality for species (synonym Delphinodon dividum) • †Brochopleurus – tentative report • †Bruclarkia • †Bruclarkia barkerianum • †Bruclarkia barkerium • †Bruclarkia columbiana • †Bruclarkia gravida • †Bruclarkia oregonensis – or unidentified comparable form • †Bruclarkia santacruzana • †Bruclarkia seattlensis • Bubo • †Bubo sinclairi – type locality for species • , or great horned owl †Bubo virginianus'' • Buccinum • †Buccinum strigillatum • Bucephala • †Bucephala albeola • †Bucida • †Bucida eocenica • Bufo • †Bulbiceps • †Bulbiceps raninus • †Bulbifusus • †Bulbifusus californicus – type locality for species • Bulimina • †Bulimina chirana • †Bulimina debilis • †Bulimina jacksonensis • †Bulimina ovata • †Bulimina ovula • †Bulimina rinconensis • †Bulimina socialis – or unidentified comparable form • Buliminella • †Buliminella curta • †Buliminella subfusiformis • Bulla • †Bulla clarki • , or the California bubble sea snail †Bulla gouldiana'' • †Bulla punctulata – or unidentified comparable form • †Bulla punctulatus • †Bulla striata • Bullia • †Bullia clarki • †Bullinula • †Bullinula subglobosa • †Bumelia • †Bumelia florissanti • Bursa • †Bursa califomica • Buteo • †Buteo borealis • , or red-tailed hawk †Buteo jamaicensis'' • †Buteo swainsoni ==C==

• Cadulus • †Cadulus fusiformis • Caecum • †Caecum californicum • Calicantharus • †Calicantharus dalli • †Calicantharus fortis • †Calicantharus humerosus • †Calicantharus portolaensis – or unidentified comparable form • †Calicovatellus – type locality for genus • †Calicovatellus petrodytes – type locality for species • Calidris • †Calidris alba • Californiconus • †Californiconus californicus • †Calilampas • †Calilampas californiensis • †Calipepla • †Calipepla californica • Calliostoma • †Calliostoma annulata • , or purple-ring top sea snail †Calliostoma annulatum'' • †Calliostoma augustinensis • †Calliostoma canaliculatum • †Calliostoma costatum • †Calliostoma crassicostatus • †Calliostoma doliarium • †Calliostoma doliarum – tentative report • †Calliostoma gemmulatum • †Calliostoma ligatum • †Calliostoma nuttalli • †Calliostoma supragranosum • †Calliostoma tricolor • Callista • †Callista domenginica • †Callista vokesi • Callistochiton • †Callistochiton palmulatus • Callithaca • †Callithaca tenerrima • Callorhinus • †Callorhinus gilmorei – type locality for species • , or northern fur seal †Callorhinus ursinus'' • Calopsectra • †Calorebama • †Calorebama inornata • †Calorhadia – tentative report • Calosoma • †Calosoma semilaeve • †Calycites • †Calycites mikanoides • , or Chinese hat snails Calyptraea'' • †Calyptraea calabasasensis • †Calyptraea contorta • †Calyptraea costellata • †Calyptraea dalliana • †Calyptraea diegoana • †Calyptraea excentrica • †Calyptraea fastigiata • †Calyptraea filosa • †Calyptraea inornata • †Calyptraea mamillaris • †Calyptraea mammilaris – or unidentified comparable form • †Calyptranthes • †Calyptranthes myrtifolia – type locality for species • †Camelops'' • †Camelops hesternus • †Camelops minidokae • †Cammackacetus – Type locality for genus • †Cammackacetus hazenorum - Type locality for species • Campanile • †Campanile dilloni • Camponotus – type locality for genus • †Camponotus festinatus – type locality for species • †Canarium • †Canarium californicum • Cancellaria • †Cancellaria arnoldi • †Cancellaria dalliana • †Cancellaria fernandoensis • †Cancellaria obesa • †Cancellaria planospira • †Cancellaria posunculensis • †Cancellaria subtuberosa • †Cancellaria tritonidea • Cancer • Cancris • †Cancris mexicanus • Canis • , the grey wolf, to scale with a fossilized skeleton of the Pleistocene wolf Canis dirus, or dire wolf †Canis dirus'' • †Canis edwardii • †Canis latrans • †Canis lepophagus • †Canis lupus • †Canis rufus • Canthon • †Canthon praticola • †Canthon simplex • †Cantius • †Cantius actius • †Capricamelus – type locality for genus • †Capricamelus gettyi – type locality for species • †Capromeryx • †Capromeryx minor'' • Caracara • †Caracara cheriway • †Caracara plancus • Carcharhinus • Carcharias • †Carcharias clavatus • †Carcharinus • Carcharodon • †Carcharodon arnoldi • †Carcharodon carcharias • †Carcharodon hastalis • †Carcharodon leviathan • †Carcharodon morricei • †Carcharodon sulcidens • †Carcharodon tembloris – type locality for species • Cardium • †Cardium brewerii, alternative of Acanthocardia brewerii (see ) • Carpelimus • †Carpites • †Carpites egregia • †Carpocyon • †Carpocyon robustus • , or hickory tree Carya'' • †Carya bendirei • †Carya sessilis • Caryophyllia • †Caryophyllia arnoldi • †Caryophyllia californica – type locality for species • †Caryophyllia capayensis – type locality for species • †Caryophyllia pedroensis – type locality for species • Cassidulina • †Cassidulina crassipunctata • †Cassidulina diversa – or unidentified comparable form • †Cassidulina globosa • Castanea • †Castanea spokanensis • Castanopsis • †Castanopsis longipetiolatum • Castor • †Castor californicus – or unidentified comparable form • †Catharista • †Catharista shastensis – type locality for species • Cathartes • , or turkey vulture †Cathartes aura'' • Catoptrophorus • †Catoptrophorus semipalmatus • †Catoptrophus • †Catoptrophus inornatus • †Catostomus • †Catostomus occidentalis • Ceanothus • †Ceanothus tuolumnensis • †Ceanothus turlockensis • Cedrela • †Cedrela eolancifolia – type locality for species • †Cedrela trainii • †Celastrus • †Celastrus preangulata – type locality for species • Celtis • †Celtis kansana • †Centetodon • †Centetodon aztecus • †Centetodon bembicophagus – or unidentified comparable form • †Centetodon magnus – or unidentified comparable form • Centrifuga • †Centrifuga leeana • Cepphus • , or pigeon guillemot †Cepphus columba'' • †Cepphus olsoni – type locality for species • Cercidiphyllum • †Cercidiphyllum elongatum • †Cercocarpus • †Cercocarpus nevadensis • Cerithidea • †Cerithidea californica • Cerithiopsis • †Cerithiopsis antefilosa • †Cerithiopsis carpenteri • †Cerithiopsis columna – or unidentified comparable form • †Cerithiopsis cosmia • †Cerithiopsis halia – or unidentified related form • †Cerithiopsis paramoea • †Cerithiopsis pedroana • †Cerithiopsis rowelli • †Cerithiopsis stejnegeri – or unidentified comparable form • Cerithium • †Cerithium incisum • †Cerithium topangensis • †Cernictis • †Cernictis hesperus – type locality for species • †Cernina • †Cernina hannibali • †Cerorhinca • †Cerorhinca dubia – type locality for species • †Cerorhinca reai – type locality for species • Cervus • †Cervus elaphus • Cetorhinus • †Cetorhinus maximus • †Cetotherium'' • †Cetotherium furlongi – type locality for species • †Chaceia • †Chaceia fulcherae – type locality for species • †Chaenophryne • †Chaenophryne melanorhabdus • Chaetodipus • †Chaetodipus formosus – or unidentified comparable form • †Chaetoptelea • †Chaetoptelea pseudofulva • †Chalcidichthys – type locality for genus • †Chalcidichthys malacopterygius – type locality for species • Chama • †Chama arcana • †Chama frondosa • †Chama grunski • †Chamaecyparis • †Chamaecyparis cordillerae • Charadrius • †Charadrius semipalmatus • , or viperfish Chauliodus'' – type locality for genus • †Chauliodus eximias • †Chauliodus eximius – type locality for species • †Chedevillia • †Chedevillia saltonensis – type locality for species • †Chedevillia stewarti – type locality for species • Chelonia • †Chelonia californiensis – type locality for species • Chen • †Chen caerulescens • '', or Law's diving-goose †Chendytes – type locality for genus • †Chendytes lawi – type locality for species • Chilostomella • †Chilostomella hadleyi • †Chilostomelloides • †Chilostomelloides ovicula • †Chilostomelloides oviformis • Chione • †Chione californiensis • †Chione cryptolineata – or unidentified comparable form • †Chione latilaminosa • †Chione lineolata – or unidentified comparable form • †Chione panzana • †Chione schencki • †Chione securis • †Chione undatella • Chionista • †Chionista fluctifraga • Chionopsis • †Chionopsis gnidia • †Chionopsis richthofeni • †Chionopsis temblorensis • Chlamys • †Chlamys bartschi • †Chlamys branneri – or unidentified comparable form • †Chlamys corteziana – or unidentified comparable form • , or spear scallop †Chlamys hastata'' • †Chlamys hertleini • †Chlamys mediacostatus – type locality for species • †Chlamys rubida • †Chlamys sespeensis • †Chlamys swifti • Chlorostoma • †Chlorostoma gallina • †Chorizanthe • †Chrisodomus • †Chrysobalanus • †Chrysobalanus eoicaco • , or maned wolf †Chrysocyon'' • †Chrysocyon nearcticus • †Chrysodomus – report made of unidentified related form or using admittedly obsolete nomenclature • †Chrysodomus martini • †Chrysolepis • †Chrysolepis sonomensis • †Chumashius • †Chumashius balchi – type locality for species • Cibicides • †Cibicides cushmani • †Cibicides martinezensis • †Cibicides pseudoungerianus • Cibicidoides • †Cibicidoides midwayensis – or unidentified comparable form • Cicindela • †Cicindela haemorrhagica • †Cicindela oregona • Cidaris • †Cidaris martinezensis • , or cinnamon tree Cinnamomum'' • †Cinnamomum acrodromum • †Cinnamomum dilleri • Cissus • †Cissus pyriformis • †Citellus • †Citellus bensoni • Citharichthys • †Citharichthys stigmaeus • †Claibornites • †Claibornites diegoensis • †Claibornites muirensis • †Claibornites turneri • sea snails Clathrodrillia'' • †Clathrodrillia coalingensis • Clathurella • †Clathurella conradiana • Clavilithes • †Clavilithes tabulatus • Clavus • †Clavus hartleyensis – type locality for species • †Clavus hemphilli • †Clavus pallidus – or unidentified related form • †Clavus temblorensis • Clementia • †Clementia brioniana • †Clementia conradiana • †Clementia pertenius • †Clementia pertenuis • Clethrionomys • Cletocamptus • cockle Clinocardium'' • †Clinocardium meekianum • †Clinocardium nuttallii • Cliona • Clupea • †Clupea hadleyi – type locality for species • †Clupea tiejei – type locality for species • Clypeaster • †Clypeaster bowersi • †Clypeaster carrizoensis – type locality for species • †Clypeaster deserti • , or whip-tail lizard Cnemidophorus'' • †Coalingodea • †Coalingodea tuberculiformis • Coccodentalium • †Coccodentalium emersoni – type locality for species • †Cocconeis • †Cocconeis disculus • †Cocconeis placentula • †Cochlespiropsis – tentative report • †Cochlespiropsis jenkinsi – type locality for species • Cochliomyia – type locality for genus • †Cochliomyia macellaria – type locality for species • marine bivalve Codakia'' • †Codakia colpoica • †Codakia distinguenda • Colaptes • †Colaptes cafer • †Colodon • Coluber • †Coluber constrictor • Colubraria • Columba – or unidentified comparable form • †Columba fasciata • Columbarium • Colymbus • †Colymbus nigricollis • †Colymbus parvus • †Colymbus subparvus – type locality for species • Compsomyax • †Compsomyax subdiaphana • cone sea snail †Conasprelloides'' • †Conasprelloides planiliratus • Concavus • †Concavus concavus • †Conchocele • †Conchocele bisecta • Coniontis • †Coniontis abdominalis – type locality for species • †Coniontis elliptica • †Coniontis lamentabilis • †Coniontis puncticollis • †Coniontis remnans – type locality for species • †Coniontis robusta • †Coniontis rugosa • Conus • †Conus caleocius • †Conus fergusoni • †Conus hornii • †Conus owenana • †Conus owenianus • †Conus redmondii – or unidentified comparable form • , or regular cone sea snail †Conus regularis'' • †Conus remondii • †Conus scalaris • Cooperella • †Cooperella subdiaphana • †Copemys • †Copemys barstowensis – type locality for species • †Copemys esmeraldensis • †Copemys longidens – type locality for species • †Copemys pagei • †Copemys russelli • †Copemys tenuis – type locality for species • †Cophocara • †Cophocara stantoni • †Cophocetus – tentative report • scarab Copris'' • †Copris pristinus – type locality for species • Coragyps • Coralliophaga • Corbicula • †Corbicula dumblei • Corbula • †Corbula diaboli – type locality for species • †Corbula dickersoni • †Corbula dilatata • †Corbula fragilis • †Corbula hornii – or unidentified comparable form • †Corbula parilis • †Corbula tomulata – or unidentified comparable form • †Cormohipparion'' • †Cormohipparion occidentale – or unidentified comparable form • Cornus • †Cornus kelloggii • †Cornus ovalis – or unidentified comparable form • †Coronadus – type locality for genus • †Coronadus agilis – type locality for species • Coronula – tentative report • Corvus • †Corvus brachyrhynchos • †Corvus corax • †Cosomys • †Cosomys primus – type locality for species • †Cosoryx • †Cosoryx cerroensis – or unidentified comparable form • Costacallista • †Costacallista hornii – or unidentified comparable form • Cranioceras, a relative of modern deer, with anachronistic human to scale †Cranioceras • †Cranioceras teres • †Cranioceras unicornis – or unidentified comparable form • †Craseops • †Craseops sylvestris – type locality for species • Crassadoma • †Crassadoma gigantea • Crassatella • †Crassatella – type locality for species A informal • †Crassatella claytonensis • †Crassatella compacta • †Crassatella granti • †Crassatella meganosensis – type locality for species • †Crassatella unioides • †Crassatella uvasana • †Crassatella washingtonensis • Crassinella • †Crassinella nuculiformis • †Crassinella pacifica • sea snail Crassispira'' • †Crassispira montereyensis – or unidentified related form • †Crassispira zizyphus • Crassostrea • †Crassostrea ashleyi • †Crassostrea titan • †Crassostrea vaquerosensis • Crataegus • †Crataegus pacifica • Crawfordina • †Crawfordina weaveri • †Crenaturricula • †Crenaturricula crenatospira • Crepidula • †Crepidula adunca • †Crepidula coei – or unidentified comparable form • †Crepidula diminutiva – type locality for species • †Crepidula excavata • †Crepidula lessoni • †Crepidula nummaria • †Crepidula nunimaria • , or onyx slipper sea snail †Crepidula onyx'' • †Crepidula pileum – or unidentified comparable form • †Crepidula praerupta • †Crepidula princeps • †Crepidula ungana – or unidentified comparable form • Crepipatella • †Crepipatella lingulata • †Crommium • †Crommium andersoni • †Crommium pinyonensis • Crossata • †Crossata ventricosa • Crotalus • , or prairie rattlesnake †Crotalus viridis'' • Crucibulum • †Crucibulum spinosum • †Crypholestes • †Crypholestes vaughni • †Cryptocarya • †Cryptocarya praesamarensis • †Cryptoconus • †Cryptoconus cooperi • Cryptomya • †Cryptomya californica • Cryptonatica • †Cryptonatica affinis • †Cryptonatica aleutica • , or drywood termite Cryptotermes'' • †Cryptotermes ryshkoffi – type locality for species • Cryptotis • Ctenocardia • †Ctenocardia biangulata • Cucullaea • †Cucullaea mathewsoni • †Cucullaea mathewsonii • Culicoides • †Culicoides carri – type locality for species • †Culicoides fossilis – type locality for species • †Culicoides laurae – type locality for species • †Culicoides megacanthus – type locality for species • †Culicoides mioceneus – type locality for species • Cumingia • †Cumingia lamellosa • †Cunnolites – tentative report • †Cupania • †Cupania oregona • †Cupidinimus • †Cupidinimus avawatzensis • †Cupidinimus bidahochiensis – or unidentified comparable form • †Cupidinimus boronensis – type locality for species • †Cupidinimus halli • †Cupidinimus lindsayi – type locality for species • †Cupidinimus tertius • , or cypress tree †Cupressus'' • †Cupressus goveniana • †Cupressus mokelumnensis • Cuspidaria • †Cuspidaria hannibali • †Cuyamacamelus • †Cuyamacamelus jamesi • †Cuyamalagus • †Cuyamalagus dawsoni – type locality for species • Cyanocitta • †Cyanocitta stelleri • Cybocephalus • †Cybocephalus californicus – or unidentified comparable form • Cyclammina • †Cyclammina clarki • †Cyclammina incisa – or unidentified comparable form • Cyclinella • Cyclocardia • †Cyclocardia californica • †Cyclocardia montereyana – type locality for species • †Cyclocardia ventricosa • †Cyclocorystes • †Cyclocorystes aldersoni – type locality for species • †Cyclosthone – or unidentified comparable form • bristlemouth Cyclothone'' • Cygnus • †Cygnus columbianus • Cylichna • †Cylichna attonsa • Cylichnella • †Cylichnella attonsa • †Cylichnella culcitella • Cymatium • †Cymatium elsemerense • †Cymatium janetae – type locality for species • Cymatogaster • †Cymatogaster aggregata • †Cymbophora • †Cynarctoides • †Cynarctoides acridens • †Cynarctoides whistleri – type locality for species • †Cynarctus • †Cynarctus galushai – type locality for species • †Cynelos'' • †Cynelos malasi – type locality for species • †Cynelos sinapius – or unidentified comparable form • †Cynorca • †Cynorca occidentale • Cynoscion • †Cynoscion eprepes • Cyperus • Cypraea • Cyrena • †Cyrena dumblei • †Cyrena studleyi – or unidentified comparable form • quail Cyrtonyx'' • †Cyrtonyx tedfordi – type locality for species • Cystiscus • †Cystiscus subtrigona • Cythara • †Cythara cetolaca • †Cythara hecetae • †Cythara interlirata • Cytherea • †Cytherea mathewsoni ==D==

• †Dalbergia • †Dalbergia rubra – type locality for species • Dallocardia • †Dallocardia quadragenarium • Damalichthys • †Damalichthys vacca • †Daphoenodon – or unidentified comparable form • †Daphoenus'' • †Daphoenus ruber – type locality for species • †Darbyella • Dardanus • †Dardanus arrosor • †Dasceles – type locality for genus • †Dasceles dassurus – type locality for species • Dasyatis • †Dasyatis dipterus • Dasyhelea • †Dasyhelea antiqua • †Dasyhelea browneae – type locality for species • †Dasyhelea dara – type locality for species • †Dasyhelea judithae – type locality for species • †Dasyhelea kanakoffi – type locality for species • †Dasyhelea stenoceras – type locality for species • , or mackerel scads †Decapterus'' • †Decapterus hopkinsi • Delectopecten • †Delectopecten lillisi • †Delectopecten peckhami • †Delphinavus – type locality for genus • †Delphinavus newhalli – type locality for species • Deltochilum – tentative report • Deltocyathus • †Deltocyathus whitei – type locality for species • Dendostrea • †Dendostrea vespertina • Dendragapus • †Dendragapus fuliginosus • , or dusky grouse †Dendragapus obscurus'' • Dendraster • †Dendraster coalingaensis – or unidentified comparable form • †Dendraster excentricus • †Dendraster gibbsi • Dendrophyllia • †Dendrophyllia californiana – type locality for species • †Dendrophyllia oldroydi – tentative report • †Dendrophyllia tejonensis – type locality for species • jumping spider Dendryphantes'' • Dentalina • †Dentalina approximata • †Dentalina consobrina • †Dentalina cooperensis • †Dentalina jarvisi • †Dentalina legumen – or unidentified comparable form • †Dentalina nasuta • †Dentalina pauperata • †Dentalina quadrulata • †Dentalina spinosa • Dentalium • †Dentalium conradi • †Dentalium cooperi • †Dentalium laneensis • †Dentalium mcganna – type locality for species • †Dentalium neohexagonum • †Dentalium radiolineata – or unidentified comparable form • †Dentalium rectius • †Dentalium stentor • †Dentalium stramineum • , or leatherback sea turtle Dermochelys'' – or unidentified related form • Deroceras • †Derrhias – type locality for genus • †Derrhias enantius – type locality for species • †Desmathyus – or unidentified related form • †Desmatippus • †Desmatippus avus • †Desmatochoerus • †Desmatochoerus hesperus • †Desmocyon • †Desmocyon thomsoni • †Desmodium • †Desmodium indentum – type locality for species • †Desmostylus'' • †Desmostylus hesperus – type locality for species • Diacria • †Diacria trispinosa • Diaphana • †Diaphana brunnea • †Diceratherium • Dichocoenia • †Dichocoenia merriami • †Dinohippus • †Dinohippus interpolatus • †Dinohippus leardi • †Dinohippus leidyanus • †Dinohippus mexicanus • †Dinohyus • †Dinohyus hollandi • Diodora • †Diodora arnoldi • †Diodora aspera • †Diodora inaequalis • †Diomeda • Diomedea • †Diomedea milleri – type locality for species • †Diomedia • †Diomedia albatrus • †Diomedia nigripes • †Dioplotherium • †Dioplotherium allisoni • , the tree genus including ebonies and persimmons †Diospyros'' • †Diospyros oregoniana • †Diospyros retinervis • Diplodonta • †Diplodonta buwaldana • †Diplodonta cretacea • †Diplodonta orbella • †Diplodonta pariiis • †Diplodonta parilis • †Diplodonta sericata • Diploria • †Diploria bowersi – type locality for species • Dipodomys • †Dipodomys agilis – or unidentified comparable form • †Dipodomys compactus • †Dipodomys deserti – or unidentified comparable form • †Dipodomys heermanni – or unidentified comparable form • †Dipodomys hibbardi • '', or Merriam's kangaroo rat †Dipodomys merriami • †Dipodomys minor • †Dipodomys ordii • †Dipoides • †Dipoides vallicula • †Diprionomys • †Diprionomys parvus – or unidentified comparable form • Discammina – tentative report • †Discammina eocenica • Discinisca • †Discinisca cumingi • sea snail †Discohelix'' • †Discohelix californicus • †Dissacus • Distorsio • Divalinga • †Divalinga eburnea • Divaricella • †Divaricella cumulata • †Domnina • †Domninoides • Donax • †Donax californicus • †Donax gouldii • †Dorothia • †Dorothia californica • Dosinia • †Dosinia conradi • †Dosinia dunkeri • †Dosinia jacalitosana • †Dosinia margaritana • †Dosinia mathewsoni • †Dosinia mathewsonii • †Dosinia merriami • †Dosinia milthoidea – tentative report • †Dosinia ponderosa • †Dosinia santana – type locality for species • †Dosinia semiobliterata – or unidentified comparable form • †Dosinia whitneyi • †Dosiniopsis • †Dosiniopsis stewartvillensis – type locality for species • †Drimys – type locality for genus • †Drimys defensor – type locality for species • †Dromomeryx • †Duchesneodus • †Duchesneodus uintensis • †Dusignathus – type locality for genus • †Dusignathus santacruzensis – type locality for species • †Dusignathus seftoni – type locality for species • †Dusisiren'' • †Dusisiren dewana • †Dusisiren jordani – type locality for species • †Dyseohyus – type locality for genus • †Dyseohyus fricki – type locality for species • †Dyseolemur • †Dyseolemur pacificus – type locality for species • Dytiscus • †Dytiscus marginicollis ==E==

• Echinarachnius • †Echinarachnius fairbanksi • shark Echinorhinus'' • †Echinorhinus blakei • Eclipes – type locality for genus • †Eclipes extensus • †Eclipes manni • †Eclipes santamonicae – type locality for species • †Eclipes veternus – type locality for species • †Ectasis – type locality for genus • †Ectasis proriger – type locality for species • †Ectinochilus • †Ectinochilus macilentus • †Ectopistes • , or passenger pigeon †Ectopistes migratorius'' • Eleodes • †Eleodes acuticaudus • †Eleodes giganteus • †Eleodes gracilis • †Eleodes grandicollis – type locality for species • †Eleodes laticollis • †Eleodes omissus • †Eleodes osculans – type locality for species • Elgaria • †Elgaria multicarinata • †Ellimma • †Ellimma barbarae – type locality for species • †Ellimma elmodenae – type locality for species • †Ellipsonodosaria • †Ellipsonodosaria alexanderi – or unidentified comparable form • †Ellipsonodosaria atlantisae • †Ellipsonodosaria recta • †Ellipsonodosaria spinulosa • Elliptotellina • †Elliptotellina townsendensis – or unidentified comparable form • being menaced by fellow-anthracothere Anthracotherium †Elomeryx'' • †Elomeryx armatus • †Emmachaere – type locality for genus • †Emmachaere rhachites – type locality for species • †Emmachaere rhomalea • †Enaliarctos • †Enaliarctos mealsi • †Enaliarctos mitchelli • †Enallagma – type locality for genus • †Enallagma kirkbyae – type locality for species • Encope • †Encope tenuis – type locality for species • Engelhardtia • †Engelhardtia nevadensis • Engina • †Engina strongi • †Engraulites – type locality for genus • †Engraulites remifer – type locality for species • Enhydra • , or sea otter †Enhydra lutris'' • †Enhydra macrodonta – type locality for species • †Enhydritherium • †Enhydritherium terraenovae • Ensis • †Ensis myrae • Entomobrya • †Entomobrya atrocincta • †Entomobrya kirkbyae – type locality for species • †Eocernia • †Eocernia hannibali • †Eocypraea • †Eocypraea castacensis – or unidentified comparable form • †Eocypraea maniobraensis – type locality for species • †Eogryphus • †Eogryphus tolmani – or unidentified comparable form • †Eohaplomys • †Eohaplomys matutinus – type locality for species • †Eohaplomys serus – type locality for species • †Eohaplomys tradux – type locality for species • †Eomellivora • †Eomellivora wimani – or unidentified comparable form • †Eopelobates'' • †Eopleurotoma • †Eopleurotoma whitakerpeakensis – type locality for species • †Eoscorpius – type locality for genus • †Eoscorpius primaevus – type locality for species • †Eosurcula • †Eosurcula inconstans – or unidentified related form • †Eotaria – type locality for genus • †Eotaria citrica – type locality for species • †Eotaria crypta – type locality for species • †Eotibia • †Eotibia llajasensis – type locality for species • †Eotylopus • †Epelichthys – type locality for genus • †Epelichthys michaelis – type locality for species • †Epicyon'' • †Epicyon haydeni • †Epicyon saevus • †Epihippus • Epilucina • †Epilucina californica • Epinephelus • †Epiphragmophora • †Epiphragmophora mormonum • †Epistomina • †Epistomina eocenica • wentletrap sea snail Epitonium'' • †Epitonium bellastriata • †Epitonium bellastriatum • †Epitonium clarki • †Epitonium condoni • †Epitonium cookii – or unidentified related form • †Epitonium cooperi • †Epitonium indianorum • †Epitonium insculptum • †Epitonium rugiferum – or unidentified comparable form • †Epitonium sawinae • Eponides • †Eponides keenani • †Eponides kleinpelli • †Eponides lodoensis • †Eponides umbonatus • Eptesicus • †Eptesicus fuscus – or unidentified comparable form • †Equisetum • Equus • †Equus conversidens • †Equus enormis • †Equus idahoensis • †Equus pacificus • †Equus scotti • , also known as the Hagerman horse or American zebra †Equus simplicidens'' • Eremophila • †Eremophila alpestris • Erethizon • †Erethizon bathygnathum • †Erethizon cascoensis – type locality for species • †Erethizon dorsatum • †Eriquius • †Eriquius plectrodes • †Erisceles – type locality for genus • †Erisceles pristinus – type locality for species • †Eritima • †Eritima evides – type locality for species • †Escharion – type locality for genus • †Escharion townleyi – type locality for species • Eschrichtius • †Eschrichtius robustus – or unidentified comparable form • †Etringus • †Etringus scintillans • Eubalaena – or unidentified comparable form • †Eucastor • , or the shrub ox. Robert Bruce Horsfall (1913). †Euceratherium'' – type locality for genus • †Euceratherium collinum – type locality for species • Eucrassatella • †Eucrassatella semidentata • †Eucrassatella subgibbosus – type locality for species • †Eucyon • †Eucyon davisi • Euleptorhamphus • †Euleptorhamphus peronides • Eumetopias • †Eumetopias jubata • †Euoplocyon • †Euoplocyon brachygnathus • Eupatagus • †Eupatagus stevensi • Euphagus • †Euphagus cyanocephalus • Eurytellina • †Eurytellina lorenzoensis • Euscelis • †Euscelis palmeri – type locality for species • stony coral Eusmilia'' • †Eusmilia carrizensis – type locality for species • Euspira • †Euspira gesteri • †Euspira hornii • †Euspira lewisii • †Euspira muriciformis • †Euspira nuciformis • †Euspirocromium • †Euspirocromium martinezensis • †Euspirocrommium • †Euspirocrommium martinezensis • chipmunk Eutamias'' • †Eutrephoceras • †Eutrephoceras hallidayi • †Eutrephoceras hannai • †Eutrephoceras marksi • †Eutrephoceras stephensoni – type locality for species • Euvola • †Euvola keepi • †Euvola vogdesi • †Evesthes • †Evesthes jordani • †Exaeretoptera – report made of unidentified related form or using admittedly obsolete nomenclature • †Exaeretoptera fosteri – type locality for species • †Exilia • †Exilia fausta • †Exilia talliaferroi – or unidentified comparable form ==F==

• Falco • †Falco peregrinus • , or American kestrel †Falco sparverius'' • Falsifusus • Farrea • †Farrea rugosa – type locality for species • Fartulum • †Fartulum hemphilli • †Fartulum occidentale • Felaniella • †Felaniella harfordi • Felis • †Felis lacustris • †Felis rexroadensis • †Ficopsis • †Ficopsis cooperiana • †Ficopsis crescentensis • †Ficopsis horni • †Ficopsis meganosensis – type locality for species • †Ficopsis redmondii • †Ficopsis remondi • †Ficopsis remondii • , or fig tree Ficus'' • †Ficus decussata • †Ficus densifolia • †Ficus gesteri • †Ficus goshenensis • †Ficus modesta – or unidentified comparable form • †Ficus nodiferum • †Ficus ocoyana • †Ficus pyriformis • Fimbria • †Fimbria pacifica • †Fimbria susanensis – type locality for species • Fissurella • †Fissurella behri – or unidentified related form • †Fissurella volcano • Flabellipecten'' • †Flabellipecten carrizoensis • †Flabellipecten stearnsii • Flabellum • †Flabellum californicum • †Flabellum clarki – type locality for species • †Flabellum cuneiforme • †Flabellum stantoni • †Forestiera • †Forestiera buchananensis • †Forfex – type locality for genus • †Forfex hypuralis – type locality for species • Forreria • †Forreria belchei • †Forreria belcheri • †Forreria carisaensis • †Forreria coalingensis • †Fragilaria • †Fragilaria brevistriata • †Fragilaria construens • †Fragilaria pinnata • Fratercula • , or tufted puffin †Fratercula cirrhata'' • †Fratercula dowi – type locality for species • †Fraxinus • †Fraxinus yubaensis – type locality for species • Frondicularia • †Frondicularia tenuissima • Fulgoraria • †Fulgoraria prevostiana • †Fulgoraria zinsmeisteri – type locality for species • †Fulica • †Fulica americana • Fulmarus • †Fulmarus glacialis • †Fulmarus griseus • †Fulmarus hammeri – type locality for species • †Fulmarus miocaenus – type locality for species • Fusimitra – tentative report • †Fusimitra simplicissima – or unidentified comparable form • Fusinus • †Fusinus barbarensis • †Fusinus calabasensis • †Fusinus chehalisensis – or unidentified comparable form • †Fusinus hecoxi • †Fusinus lincolnensis – or unidentified related form • †Fusinus luteopictus • †Fusinus meganosensis – type locality for species • †Fusinus merriami – or unidentified related form • †Fusinus simiensis ==G==

• , or tiger shark Galeocerdo'' • †Galeocerdo aduncus • †Galeocerdo medius • Galeodea • †Galeodea calfornica • †Galeodea carinata – or unidentified related form • †Galeodea meganosensis • †Galeodea petersoni – or unidentified related form • †Galeodea susanae • †Galeodea sutterensis • school shark Galeorhinus'' • †Galeorhinus hannibali • †Galeorhinus latus – or unidentified comparable form • †Galeorhinus zopterus • †Ganolytes • †Ganolytes aratus • †Ganolytes cameo • †Ganolytes clepsydra – type locality for species • Gari • †Gari californica • †Gari diegoensis – or unidentified comparable form • †Gari furcata • †Gari hornii • †Gari texta • †Gasterosternus • †Gasterosternus aculeatus • Gasterosteus • , or three-spined stickleback †Gasterosteus aculeatus'' • Gastrochaena • †Gastrochaena dubitata – tentative report • Gaudryina • †Gaudryina laevigata • †Gaudryina triangularis – or unidentified comparable form • Gavia • †Gavia arctica • †Gavia brodkorbi – type locality for species • †Gavia concinna • †Gavia howardae – type locality for species • †Gavia immer • †Gavia pacifica • , or red-throated loon †Gavia stellata'' • †Gemelliporella – tentative report • †Gemelliporella punctata – or unidentified related form • Gemmula • †Gemmula diabloensis – type locality for species • †Gemmula wattsi • Genota • †Genota keepi • Genyonemus • †Genyonemus lineatus • Geochelone • †Geococcyx • , or greater roadrunner †Geococcyx californianus'' • Geomys • Geranoaetus • Gerrhonotus • Gibbolucina • †Gibbolucina gyrata • †Gibbolucina turneri • †Gila – tentative report • †Gilbertia • †Gisortia • †Gisortia clarki • Glans • †Glans carpenteri • Glaucidium • , or mountain pygmy owl †Glaucidium gnoma'' • Glebocarcinus • †Glebocarcinus amphioetus • Globigerina • †Globigerina bulloides • †Globigerina decepta • †Globigerina ouachitaensis • †Globigerina triloculinoides • Globorotalia • †Globorotalia crassata • Globularia • †Globularia hannabali – or unidentified comparable form • Glossus • †Glossus susukii – type locality for species • Glycimeris • , or bittersweet clam Glycymeris'' • †Glycymeris branneri • †Glycymeris gigantea • †Glycymeris major • †Glycymeris perrini • †Glycymeris rosecanyonensis • †Glycymeris sagittata • †Glycymeris septentrionalis • †Glycymeris veatchi • †Glycymeris veatchii • Glyptoactis • †Glyptoactis domenginica • †Glyptoactis keenae • †Glyptoactis mcmasteri • †Glyptoactis sandiegoensis • Glyptostrobus • †Glyptostrobus oregonensis • †Gnathamitermes • †Gnathamitermes rousei – type locality for species • Gnathotermes • †Golerdelphys – type locality for genus • †Golerdelphys stocki – type locality for species • †Goleremys – type locality for genus • †Goleremys mckennai – type locality for species • †Gomphotaria – type locality for genus • †Gomphotaria pugnax – type locality for species • †Gomphotherium'' • †Gomphotherium obscurum • †Goniobasis – tentative report • Goniopora • †Goniopora vaughani – type locality for species • Gopherus • †Gopherus agassizi • †Gopherus agassizii • †Gopherus mohavetus – type locality for species • †Gordonia • †Gordonia egregia • Granulina • †Granulina margaritula • †Gripholagomys – tentative report • †Griphomys • †Griphomys alecer – type locality for species • †Griphomys toltecus – type locality for species • Gymnogyps • , or California condor †Gymnogyps californianus'' – type locality for species • Gyroidina • †Gyroidina condoni • †Gyroidina orbicularis • †Gyroidina planulata • †Gyroidina soldanii ==H==

• †Hadrogyps – type locality for genus • †Hadrogyps aigialeus – type locality for species • Haliaeetus • †Haliaeetus leucocephalus • †Haliaetus • †Haliaetus leucocephalus • †Halonanus • †Halonanus horni • †Hamamelites • †Hamamelites voyana • bubble sea snail Haminoea'' • †Haminoea postangulata – type locality for species • †Haminoea vesicula • Hanetia • †Hanetia elegans • †Hantkenina • †Hantkenina alabamensis • Haplophragmoides • †Haplophragmoides flagleri • †Haplophragmoides obliquicameratus • †Harpagolestes'' – or unidentified comparable form • †Harrymys • †Harrymys magnus • Harvella • †Harvella elegans • †Hastigerinella • †Hastigerinella eocenica • †Hayia – type locality for genus • †Hayia daulica – type locality for species • †Heliscomys • †Heliscomys walshi – type locality for species • Heloderma • †Hemiacodon • †Hemiacodon gracilis • relative Hemiauchenia †Hemiauchenia • †Hemiauchenia macrocephala • Hemipristis • †Hemipristis heteropleurus • †Hemipristis serra • Hemitelia • †Hemitelia pinnata – type locality for species • Hemitoma • †Hemitoma cantonensis – type locality for species • †Hercoglossa • †Hercoglossa merriami – type locality for species • †Hercoglossa simiensis – type locality for species • Here • †Here excavata • †Herpetocetus • †Herpetocetus bramblei – type locality for species • †Herpetocetus morrowi – type locality for species • †Herpetotherium'' • †Herpetotherium innominatum – or unidentified comparable form • †Herpetotherium knighti – or unidentified comparable form • †Herpetotherium valens • †Hesperaletes • †Hesperaletes borineyi – type locality for species • †Hesperaletes walshi – type locality for species • Hespererato • †Hespererato columbella • †Hesperhys • †Hesperhys vagrans • †Hesperocamelus – or unidentified comparable form • †Hesperocetus – type locality for genus • †Hesperocetus californicus – type locality for species • †Hesperolagomys • Hesperomys • †Hesperomys nematodon • †Hesperotestudo • †Hesperotestudo orthopygia • , or bullhead shark Heterodontus'' • †Heterodontus francisi – or unidentified comparable form • †Heteropliohippus • †Heteropliohippus hulberti – type locality for species • Heterosilpha • †Heterosilpha ramosa • Heteroterma • †Heteroterma striata • †Heteroterma trochoidea • †Hexacanthus • Hexagrammos • †Hexagrammos achrestus – type locality for species • , or sixgill shark Hexanchus'' • †Hexanchus aus • †Hexanchus bus • Hiatella • †Hiatella arctica • †Hilgardia – tentative report • †Hilgardia parkei • †Hiltonius • †Hiltonius australis – type locality for species • . Heinrich Harder (1920). †Hipparion'' • †Hipparion forcei • †Hipparion tehonense • †Hippidion • †Hippipeda • †Hippnoe • †Hippnoe californica • Hipponix • †Hipponix craniodes • †Hipponix tumens • †Hipponoe • †Hipponoe californica • †Hippotherium • Histrionicus • †Histrionicus histrionicus – tentative report • Hodomys • Homalopoma • †Homalopoma carpenteri • †Homalopoma domenginensis • †Homalopoma pacifica • †Homalopoma wattsi • Homo • †Homo sapiens • †Homomya • , or scimitar cat †Homotherium'' • †Homotherium serum – or unidentified comparable form • †Hopkinsina • †Hopkinsina compressa • †Hoplictis • †Hoplictis grangerensis – or unidentified comparable form • †Hoplophoneus • †Hoplophoneus cerebralis • †Humilaria • †Humilaria perlaminosa • †Hyaenodon'' • †Hyaenodon venturae • †Hyaenodon vetus – type locality for species • Hyalina • †Hyalina californica • †Hyalinonetrion • †Hyalinonetrion clavatum • Hydrangea • †Hydrangea californica – type locality for species • †Hydrodamalis • †Hydrodamalis cuestae – type locality for species • '', or Steller's sea cow †Hydrodamalis gigas • Hydrophilus • Hyla • †Hyopsodus – or unidentified comparable form • †Hyperbaena • †Hyperbaena diforma • †Hypertragulus • †Hypertragulus calcaratus • †Hypertragulus hesperius • †Hypohippus • †Hypolagus • †Hypolagus edensis – type locality for species • †Hypolagus fontinalis • †Hypolagus furlongi • †Hypolagus gidleyi • †Hypolagus parviplicatus – or unidentified comparable form • †Hypolagus tedfordi • †Hypolagus vetus • †Hyrachyus ==I==

• †Ibarus • †Ibarus ignotus – or unidentified comparable form • †Idiophyseter – type locality for genus • †Idiophyseter merriami – type locality for species • †Ignacius • †Ignacius frugivorus • †Ilingoceros • †Imagotaria'' – type locality for genus • †Imagotaria downsi – type locality for species • †Indarctos • †Inga • †Inga ionensis – type locality for species • †Interchlamys • †Interchlamys interlineata – or unidentified comparable form • †Ioscion • †Ioscion morgani • Ischnochiton • †Ischnochiton sanctaemonicae • †Ischyrocyon • †Ischyrocyon gidleyi • †Ischyromys'' • Iselica • †Iselica fenestrata • Isognomon • †Isognomon clarki • Isurus • †Isurus aus • †Isurus benedini • †Isurus bus • †Isurus oxyrhynchus • †Isurus oxyrinchus • †Isurus planus ==J==

• †Jacobsomys • †Jacobsomys dailyi – type locality for species • †Jamilcotatus • †Jamilcotatus boreios – type locality for species • Jaton • †Jaton eldridgei • †Jaton festivus • †Johannsenomyia • †Johannsenomyia hotchkissae – type locality for species • Jouannetia • Juliacorbula • †Juliacorbula luteola • †Julus • †Julus cavicola – type locality for species • †Julus occidentalis – type locality for species • †Jumaraina • †Jumaraina rinconensis – type locality for species • †Juncus • , or juniper tree Juniperus'' ==K==

• Kalolophus • †Kalolophus antillarum – or unidentified comparable form • †Kampholophos – type locality for genus • †Kampholophos serrulus – type locality for species • Karreriella • †Karreriella barbati • †Karreriella mediaaquaensis • Katherinella • Kelletia • †Kelletia kelletii • Kellia • †Kellia suborbicularis • †Kentriodon'' – type locality for genus • †Kentriodon obscurus – type locality for species • †Keteleeria • †Keteleeria heterophylloides • †Kewia – tentative report • †Kewia fairbanksi – or unidentified comparable form • †Kingena • †Kingena simiensis • †Kirkomys – or unidentified comparable form • †Knightomys – or unidentified comparable form • †Kummelonautilus • Kurtiella • †Kurtiella tumida • Kurtzia • †Kurtzia arteaga • Kurtziella • †Kurtziella plumbea ==L==

• land snail †Labyrinthus'' • †Labyrinthus obtusus – type locality for species • Lacuna • †Lacuna carinata • †Lacuna porrecta • †Lacuna solidula • †Lacuna unifasciata • †Lacunaria • †Lacunaria striata – or unidentified related form • Laevicardium • , or giant egg cockle †Laevicardium elatum'' • †Laevicardium substriatum • Lagena • †Lagena isabella • †Lagena strumosa • †Lagena substriata • †Lagena sulcata • †Lagena vulgaris • Lamelliconcha • †Lamelliconcha clarki • Lamna • Lampanyctus • †Lampris – type locality for genus • †Lampris zatima'' – type locality for species • †Lamprolithax – type locality for genus • †Lamprolithax annectens – type locality for species • †Lamprolithax simulans – type locality for species • Lampropeltis • †Lampropeltis getulus • †Lantanotherium • †Lantanotherium dehmi • †Lantanotherium sawini • †Lapparia • †Lapparia eomagna • Larus • , or California gull †Larus californicus'' • †Larus delawarensis • †Larus glaucescens • †Larus philadelphia • Latirus • †Latirus buwaldana • †Latirus nightingalei – or unidentified comparable form • †Latirus roseburgensis – or unidentified comparable form • †Laurophyllum • †Laurophyllum fremontensis • †Laurophyllum litseaefolia • †Laytonia – type locality for genus • †Laytonia californica – type locality for species • Lechytia • Leda • †Leda gabbi • †Legionarictis – type locality for genus • †Legionarictis fortidens – type locality for species • †Leidymys • †Lembicus – type locality for genus • †Lembicus meiklejohni – type locality for species • Lenticulina • †Lenticulina convergens • Lepeta • †Lepeta concentrica • chiton Lepidochitona'' • †Lepidochitona keepiana • †Lepidogobias • †Lepidogobias lepidus • Lepidozona • †Lepidozona pectinulatus • Lepisosteus • †Lepisosteus spatula – or unidentified comparable form • †Leptacanthichthys • †Leptacanthichthys gracilispinis • †Leptarctus • †Leptarctus ancipidens • †Leptarctus wortmani • †Leptocyon'' • †Leptocyon leidyi • †Leptocyon tejonensis – type locality for species • †Leptocyon vafer • †Leptocyon vulpinus • †Leptodontomys • †Leptodontomys stirtoni • †Leptomeryx • †Leptomeryx blacki • Leptopecten • †Leptopecten andersoni • , or kelp scallop †Leptopecten latiauratus'' • †Leptoreodon • †Leptoreodon edwardsi – type locality for species • †Leptoreodon golzi – type locality for species • †Leptoreodon leptolophus – type locality for species • †Leptoreodon major – type locality for species • †Leptoreodon marshi – or unidentified comparable form • †Leptoreodon pusillus – type locality for species • †Leptoreodon stocki – type locality for species • †Leptotomus • †Leptotomus caryophilus • Lepus • †Lepus americanus • †Lepus californicus • †Lepus callotis • Leukoma • †Leukoma staminea • Lima • Limaria • †Limaria hemphilli • †Limnocyon'' • †Limnoecus • †Limnoecus tricuspis – type locality for species • †Limosa • †Limosa fedoa • †Limosa vanrossemi – type locality for species • Linga • †Linophryne • †Linophryne indica • †Liolithax – type locality for genus • †Liolithax kernensis – type locality for species • Liquidambar • †Liquidambar californicum • Lirobittium – tentative report • †Lirosceles • †Lirosceles elegans – type locality for species • Lirularia • †Lirularia funiculata • †Lirularia lirulata • Lissodelphis – or unidentified comparable form • †Lithocarpus • †Lithocarpus klamathensis • †Lithocarpus nevadensis • Lithophaga • †Lithophaga plumula • Lithophyllum • †Lithophyllum sierraeblancae – type locality for species • †Lithornis'' – or unidentified comparable form • Lithothamnion • †Lithothamnion grahami • †Lithothamnion laminosum – type locality for species • †Lithothamnion luxurum • †Lithothamnion manni • †Lithothamnion meganosium • †Lithothamnion validum – or unidentified related form • †Lithothamnion wallisium • †Litorhadia • †Litorhadia washingtonensis – or unidentified comparable form • Littorina • †Littorina petricola • †Littorina planaxis • †Littorina scutulata • †Lituyapecten • †Lituyapecten purisimaensis • †Lompoquia'' – type locality for genus • †Lompoquia retropes – type locality for species • †Lonchodelphis • †Lonchodelphis occiduus – type locality for species • Lontra • †Lontra canadensis • †Lophar – type locality for genus • †Lophar miocaenus – type locality for species • †Lophocetus • †Lophocetus repenningi – type locality for species • †Lophortyx • †Lophortyx californica • †Lora • †Losinia • Lottia • †Lottia limatula • , or rough limpet †Lottia scabra'' • †Loxolithax – type locality for genus • †Loxolithax sinuosa – type locality for species • †Loxotrema • †Loxotrema turritum • Lucapinella • †Lucapinella callomarginata • Lucina • †Lucina gaylordi • †Lucina wattsi • Lucinisca • †Lucinisca nuttalli • Lucinoma • †Lucinoma acutilineata • †Lucinoma annulatum • Luidia • †Luidia etchegoinensis – type locality for species • †Luidia sanjoaquinensis – type locality for species • †Lutianus • †Lutianus hagari – type locality for species • †Lycophocyon'' – type locality for genus • †Lycophocyon hutchisoni – type locality for species • †Lygisma – type locality for genus • †Lygisma tenax – type locality for species • Lygodium • †Lygodium kaulfussi • Lynx • †Lynx fasciatus • †Lynx rufus • Lyonsia • †Lyonsia califomica • †Lyonsia venturaensis – type locality for species • Lyria • †Lyria andersoni • †Lyrischapa • †Lyrischapa lajollaensis • †Lyropecten • †Lyropecten bowersi • †Lyropecten crassicardo • †Lyropecten magnolia • †Lyropecten miguelensis • †Lyropecten perrini • †Lyrosurcula – tentative report ==M==

• †Machaeromeryx – tentative report • †Machaeromeryx tragulus • †Machairodus'' • Macoma • †Macoma andersoni • †Macoma calcarea • †Macoma carlottensis • †Macoma copelandi • †Macoma diabloensis • †Macoma expansa • †Macoma indentata • †Macoma inquinata • †Macoma moesta • , or the bent-nosed clam †Macoma nasuta'' • †Macoma pabloensis – or unidentified comparable form • †Macoma panzana • †Macoma planiuscula – or unidentified comparable form • †Macoma secta • †Macoma viticola • Macrarene • Macrocallista • †Macrocallista furlongi – or unidentified comparable form • †Macrocallista horni – or unidentified comparable form • †Macrocallista meganosensis – type locality for species • †Macrocallista pittsburgensis • †Macrocallista squalida • †Macrocallista squalidus • †Macrocallista weaveri • †Macrochlamis • †Macrochlamis magnolia • (background) †Macrodelphinus'' – type locality for genus • †Macrodelphinus kelloggi – type locality for species • †Macrotarsius • †Macrotarsius roederi – type locality for species • Mactromeris • †Mactromeris abbotti • †Mactromeris acutirostrata – or unidentified comparable form • †Mactromeris albaria • †Mactromeris bisculpturata – or unidentified comparable form • †Mactromeris brevirostrata • †Mactromeris catilliformis • †Mactromeris hemphillii • †Mactromeris mercedensis – or unidentified comparable form • †Mactromeris merriami • †Mactromeris montereyana – type locality for species • †Mactromeris muliniaformis – type locality for species • †Mactromeris pittsburgensis – or unidentified comparable form • †Mactromeris polynyma • †Mactromeris ramonensis • †Mactromeris rushi • †Mactromeris sectoris • †Mactromeris tejonensis • Mactrotoma • †Mactrotoma californica • †Mactrotoma nasuta • Madracis • †Madracis wellsi – type locality for species • Madrepora • †Madrepora solida – type locality for species • flower Magnolia'' • †Magnolia corrallina • †Magnolia dayana • Mahonia • †Mahonia macginitiei • †Mahonia reticulata • †Mahonia simplex • Makaira • Malea • †Malea ringens • Malletia • Mallotus • †Mallotus riparius • †Mambrinia • †Mambrinia gallica – type locality for species • †Mammut • †Mammut americanum – all local specimens previously referred to this species have since been reclassified in the new species M. pacificus. • †Mammut cosoensis • †Mammut matthewi • †Mammut pacificus – type locality for species. Many specimens were previously regarded as specimens of M. americanum. • †Mammuthus • †Mammuthus columbi • †Mammuthus exilis • †Mammuthus hayi • , or wooly mammoths †Mammuthus primigenius'' • †Mancalla – type locality for genus • †Mancalla californiensis – type locality for species • †Mancalla cedrosensis – or unidentified comparable form • †Mancalla diegenesis • †Mancalla diegensis – type locality for species • †Mancalla emlongi – type locality for species • †Mancalla lucasi – type locality for species • †Mancalla milleri – type locality for species • †Mancalla vegrandis • †Mancalla vergrandis – type locality for species • †Mangelia • †Mangelia variegata • †Margaritana • †Margaritana falcata – or unidentified comparable form • Margarites • †Margarites pupillus • margin sea snail Marginella'' • Marginulina • †Marginulina adunca – or unidentified comparable form • †Marginulina dubia • †Marginulina eximia • †Marginulina munda • Marmota • †Marshochoerus • †Marshochoerus socialis • , or marten Martes'' • Martesia • †Martesia meganosensis – type locality for species • †Martinogale • †Martinogale faulli – type locality for species • Martinottiella • †Martinottiella eocenica • Maxwellia • †Maxwellia gemma • †Mayena – tentative report • †Mayena kewi – or unidentified comparable form • †Mealanitta • †Mealanitta deglandi • †Mediochoerus • †Mediochoerus mohavensis • †Megacamelus • †Megacamelus merriami • Megachasma • †Megachasma applegatei – type locality for species • Megachile • †Megachile gentilis • †Megahippus • †Megahippus matthewi • †Megahippus mckennai – type locality for species • †Megalonyx'' • †Megalonyx jeffersonii • †Megalonyx mathisi – type locality for species • †Megalonyx wheatleyi • Megalops – tentative report • †Megalops vigilax • †Megapaloelodus • †Megapaloelodus connectens • †Megapetalus • Megaptera • †Megaptera miocaena – type locality for species • Megatebennus • †Megatebennus bimaculata • †Megatebennus bimaculatus • Megathura – tentative report • †Megatylopus • †Megatylopus matthewi – or unidentified comparable form • †Megistostoma • †Megistostoma gabbiana – or unidentified comparable form • Melampus • †Melampus olivaceous • †Melampus olivaceus • Melanella • †Melanella hastata • †Melanella micans • Melanitta • †Melanitta ceruttii – type locality for species • †Melanitta deglandi – tentative report • †Melanitta fusca • †Melanitta perspicillata • Melanoplus • †Melanoplus differentialis • Melanthrips • Meleagris • †Meleagris richmondi – type locality for species • †Meliosma • †Meliosma truncata – type locality for species • †Melosira • †Melosira solida • Melospiza • †Melospiza melodia • †Meniscomys • †Meniscotherium • †Meniscotherium tapiacitum • †Menoceras'' • †Menoceras barbouri • Mephitis • †Mephitis mephitis • †Mercyhippus – report made of unidentified related form or using admittedly obsolete nomenclature • †Mercyhippus brevidontus • Meretrix • †Meretrix californica • †Meretrix conradi • †Meretrix hornii • †Meretrix lorenzana • †Meretrix palmeri – type locality for species • †Meretrix stantoni • †Meretrix uvasana – type locality for species • Mergus • †Mergus serrator • Merluccius • †Merluccius productus • †Merriamina – type locality for genus • †Merriamina ectenes – type locality for species • with an anachronistic human to scale †Merriamoceros'' • †Merriamoceros coronatus – type locality for species • †Merychippus • †Merychippus brevidontus – type locality for species • †Merychippus californicus – type locality for species • †Merychippus relictus – or unidentified comparable form • †Merychippus stevensi • †Merychyus • †Merychyus elegans • †Merychyus minimus • †Merychyus novomexicanus • †Merychyus smithi • †Merycobunodon • †Merycobunodon littoralis – type locality for species • †Merycodus'' • †Merycodus joraki • †Merycodus necatus • Mesalia • †Mesalia clarki – type locality for species • †Mesalia martinezensis • †Mesocyon • †Mesocyon brachyops • †Mesocyon coryphaeus • †Mesodma – tentative report • †Mesohippus • Mesophyllum • †Mesophyllum californicum • †Mesophyllum fructiferum • †Mesophyllum obsitum • †Mesophyllum schenckii – type locality for species • †Mesophyllum schenki • mammal Mesoreodon †Mesoreodon • †Mesoreodon chelonyx • †Metacerithium • †Metacerithium packardi • †Metalopex • †Metalopex merriami • †Metanoiamys • †Metanoiamys agorus – type locality for species • †Metanoiamys fantasma • †Metanoiamys korthi – type locality for species • †Metanoiamys marinus – type locality for species • †Metarhinus • †Metarhinus pater – type locality for species • †Metatomarctus • †Metatomarctus canavus • †Metaxytherium'' • †Metaxytherium arctodites • †Metechinus • †Metechinus amplior • †Miacis • †Miacis hookwayi – type locality for species • †Michenia • †Michenia agatensis • †Michenia mudhillsensis • Micranellum • †Micranellum crebricinctum • †Microcosmodon – or unidentified comparable form • Microdipodops • , or tomcod Microgadus'' – tentative report • †Micropallus • †Micropallus whitneyi • †Microparamys • †Microparamys minutus – or unidentified comparable form • †Microparamys tricus – type locality for species • †Microparamys woodi – type locality for species • †Microsula • †Microsyops • †Microsyops annectens – or unidentified comparable form • †Microsyops kratos – type locality for species • †Microtomarctus • †Microtomarctus conferta • Microtus • , or California vole †Microtus californicus'' • †Microtus meadensis • †Microtus miguelensis – type locality for species • Mictomys • †Mictomys kansasensis • †Mictomys vetus • Miltha • †Miltha meganosensis – type locality for species • †Miltha packi • †Miltha sanctaecrucis • †Miltha xantusi • †Mimomys • †Mimotricentes • †Mimotricentes tedfordi – type locality for species • †Miochlorotettix – type locality for genus • †Miochlorotettix gibroni – type locality for species • †Miochlorotettix kirkbyi – type locality for species • †Miocryptorhopalum – type locality for genus • †Miocryptorhopalum kirkbyae – type locality for species • †Miocyon • †Miocyon scotti – or unidentified comparable form • †Miodelphis – type locality for genus • †Miodelphis californicus – type locality for species • †Miogonates – type locality for genus • †Miogonates subimpunctatus – type locality for species • †Miohierax – type locality for genus • †Miohierax stocki – type locality for species • †Miohippus • †Miohippus annectens • †Miolabis • †Miolabis californicus – type locality for species • †Miolabis fricki – type locality for species • compared with the skull of a Holocene Pinguinus impennis, or great auk †Miomancalla'' • †Miomancalla howardi – type locality for species • †Miomancalla wetmorei – type locality for species • †Miomesamia – type locality for genus • †Miomesamia juliae – type locality for species • †Miomonalonion – type locality for genus • †Miomonalonion conoidifrons – type locality for species • †Miomustela • †Mionictis • †Mionictis angustidens • †Miospermophilus • †Miospermophilus wyomingensis – or unidentified comparable form • †Miosula – type locality for genus • †Miosula media – type locality for species • †Miotapirus • †Miotomodon • †Miotomodon mayi – type locality for species • †Miotroctes – type locality for genus • †Miotroctes rousei – type locality for species • †Miotylopus • †Miotylopus gibbi • , or American cheetah †Miracinonyx'' • †Miracinonyx studeri – tentative report • Mirounga • †Mirounga angustirostris – or unidentified comparable form • Mitra • †Mitra fultoni • †Mitra idae • †Mitra idea • †Mitra simplicissima • Mitrella • †Mitrella carinata • †Mitrella gausapata • †Mitrella gouldi • †Mitrella tuberosa • †Mixocetus – type locality for genus • †Mixocetus elysius – type locality for species • Modiolatus • †Modiolatus rectus • Modiolus • , or fat horsemussel †Modiolus capax'' – or unidentified comparable form • †Modiolus carpenteri • †Modiolus multiradiatus • †Modiolus ornatus • †Modiolus veronensis • †Modiolus ynezianus • Modulus • †Modulus unidens • †Mojavemys • †Mojavemys alexandrae – type locality for species • †Mojavemys lophatus • †Mojavemys wilsoni • †Molopophorus • †Molopophorus aequicostatus – or unidentified comparable form • †Molopophorus antiquatus • †Molopophorus biplicatus • †Molopophorus californicus – type locality for species • †Molopophorus dalli • †Molopophorus tejonensis • Moniliopsis • †Moniliopsis incisa • triton sea snail Monoplex'' • †Monoplex amictus • †Monosaulax • †Monosaulax pansus • Montipora • †Mookomys • †Mookomys formicarum • †Mookomys subtilis • Mopalia • †Mopalia acuta • †Mopalia ciliata • †Mopalia lignosa – or unidentified comparable form • †Moropus'' • Morula • †Morula lugubris • Morus – or unidentified comparable form • Morus • †Morus humeralis – type locality for species • †Morus lompocanus – type locality for species • †Morus magnus – type locality for species • †Morus recentior – type locality for species • †Morus reyana – type locality for species • †Morus reyma • †Morus reyna • †Morus vagabundus – type locality for species • Mulinia • †Mulinia pallida • Murex – or unidentified related form • †Murex mansfieldi – or unidentified related form • Musculus • Mustela • †Mustela americana – type locality for species • †Mustela frenata • †Mya • †Mya dickersoni • †Mya fujiei • †Mya truncata • †Myadesma • †Myadesma pacifica • Myctophum • Myliobatis • †Myliobatis californicus • †Mylohyus'' • †Mylohyus fossilis • †Mylopharodon • †Mylopharodon conocephalus • Mysella • †Mysella aleutica • Mytilimeria • Mytilimeria nuttalli • Mytilus • †Mytilus arnoldi • , or california mussels †Mytilus californianus'' • †Mytilus edulis • †Mytilus expansus • †Mytilus loeli • †Mytilus mathewsoni • †Mytilus mathewsonii • †Mytilus middendorffi • †Mytonolagus • †Mytonomys • †Mytonomys burkei – type locality for species • †Mytonomys mytonensis – or unidentified comparable form • Myurella • †Myurella martini ==N==

• †Nannippus'' • †Nannocetus – type locality for genus • †Nannocetus eremus – type locality for species • †Nannolithax – type locality for genus • †Nannolithax gracilis – type locality for species • †Nanotragulus • †Nanotragulus ordinatus – tentative report • Narona • †Narona clavatula • Nassa • †Nassa cerritensis • †Nassa delosi • †Nassa fossata • †Nassa mendica • †Nassa perpinguis • †Nassa tegula • Nassarius • †Nassarius californianus • †Nassarius cerritensis • , or channeled basket snail †Nassarius fossatus'' • †Nassarius grammatus • †Nassarius hamlini • †Nassarius inquus • †Nassarius mendicus • †Nassarius perpinguis • †Nassarius stocki • †Nassarius tegula • †Nassarius whitneyi • Natica • †Natica lewisi – or unidentified related form • †Natica recluziana • †Natica uvasana • Naticarius • †Naticarius unifasciata • , or American mountain deer †Navahoceros'' • Nectandra • †Nectandra presanguinea • Negaprion • †Negaprion antiquus • †Negaprion elongata – or unidentified comparable form • †Nekrolagus • †Nelumbium • †Nelumbium lacunosum – type locality for species • Nemocardium • †Nemocardium centifilosum • †Nemocardium linteum • †Neobernaya • †Neobernaya fernandoensis • †Neobernaya spadicea • †Neoculicoides – type locality for genus • †Neoculicoides jeanneae – type locality for species • †Neogyps • †Neogyps errans • †Neohipparion • †Neohipparion eurystyle • †Neohipparion gidleyi – type locality for species • †Neohipparion leptode • †Neohipparion trampasense • †Neoliotomus – or unidentified comparable form • †Neolitsea • †Neolitsea lata – type locality for species • †Neoparadoxia'' – type locality for genus • †Neoparadoxia cecilialina – type locality for species • †Neoparadoxia repenningi – type locality for species • Neophrontops • †Neophrontops americanus • †Neoplagiaulax • Neotamias • †Neotamias senex • †Neotherium – type locality for genus • †Neotherium mirum – type locality for species • Neotoma • †Neotoma cinerea – type locality for species • †Neotoma fossilis • †Neotoma fuscipes • †Neotoma lepida • †Neotoma quadriplicata • †Neotoma sawrockensis • †Neotoma taylori • Neptunea • †Neptunea andersoni • †Neptunea eurekaensis • †Neptunea lawsoni • †Neptunea lirata • †Neptunea mucronata • †Neptunea pulchra • †Neptunea scotiaensis • †Neptunea tabiilata – or unidentified comparable form • †Neptunea tabulata • Nerita • †Nerita beali – tentative report • or nerite snails Neritina'' • †Neritina picta • †Nerium • †Nerium hinoidea – type locality for species • †Nerterogeomys • †Nerterogeomys anzensis • †Nerterogeomys garbanii • Neverita • †Neverita alta • †Neverita callosa • †Neverita globosa • †Neverita reclusiana • †Neverita reclusianus • †Neverita recluziana • †Neverita recluzianus • †Neverita secta – or unidentified comparable form • †Neverita thomsonae • Nicrophorus • †Nicrophorus guttula • †Nicrophorus marginatus – type locality for species • †Nicrophorus nigrita • †Nimravides • †Nimravides thinobates • †Nimravus'' • Niso – tentative report • †Niso antiselli • †Nitzschia • †Nitzschia reinholdi • †Nitzschia romana • Nodipecten • †Nodipecten cerrosensis • †Nodipecten estrellanus • †Nodipecten subnodosus • Nodogenerina • †Nodogenerina adolphina • †Nodogenerina advena • †Nodogenerina sanctaecrucis • †Nodogenerina wegemanni • Nodosaria • †Nodosaria holserica • †Nodosaria longiscata • †Nodosaria pyrula • Nonion • †Nonion incisum • †Nonomys • †Nonomys gutzleri – type locality for species • Norrisia • †Norrisia norrisii • †Nothroptheriops • †Nothroptheriops shastense – or unidentified comparable form • †Nothrotheriops'' • †Nothrotheriops texanus • †Nothrotherium • †Nothrotherium shastense – type locality for species • Notiosorex • †Notiosorex crawfordi • †Notiosorex jacksoni • Notoacmea • †Notoacmea inessa • Notorhynchus • †Nototamias • Nucella • †Nucella elsmerensis • †Nucella emarginata • †Nucella lamellosa • †Nucella lima • †Nucella spirata • †Nucella trancosana • Nucula • †Nucula exigua • †Nucula gabbiana • †Nucula washingtonensis • Nuculana • †Nuculana gabbi – or unidentified comparable form • †Nuculana ochsneri • †Nuculana ramonensis • Numenius • , or whimbrel †Numenius phaeopus'' • Nutricola • †Nutricola cymata • †Nutricola ovalis • †Nutricola salmonea • †Nutricola tantilla • Nuttallia • †Nuttallia nuttallii • †Nyctitherium – or unidentified comparable form • Nyctoporis • †Nyctoporis carinata • †Nyssa • †Nyssa californica • †Nyssa copeana ==O==

• †Ocajila – or unidentified comparable form • Oceanodroma • , or fork-tailed storm petrel †Oceanodroma furcata'' • †Oceanodroma homochroa • †Oceanodroma hubbsi – type locality for species • †Ocenbra • †Ocenbra topangensis – or unidentified comparable form • Ocenebra • †Ocenebra barbarensis – or unidentified comparable form • †Ocenebra circumtexta • †Ocenebra foveolata • †Ocenebra interfossa • †Ocenebra lurida • †Ocenebra poulsoni • †Ocenebra tenuisculpta • †Ocenebra topangensis • Ocotea • †Ocotea ovoidea • †Ocotea perseaformis • †Ocystias • †Ocystias sagitta • †Odaxosaurus • Odobenus • , or walrus †Odobenus rosmarus'' • Odocoileus • †Odocoileus hemionus • †Odocoileus virginianus – or unidentified comparable form • Odontaspis • †Odontaspis ferox • †Odontogryphaea – tentative report • †Odontogryphaea haleyi • Odostomia • †Odostomia avellana • †Odostomia beringi – or unidentified comparable form • †Odostomia californica – or unidentified comparable form • †Odostomia callimene – or unidentified related form • †Odostomia columbiana – or unidentified comparable form • †Odostomia diaboli • pyram shell sea snail †Odostomia donilla'' • †Odostomia eugena • †Odostomia farallonensis • †Odostomia fetella • †Odostomia gravida • †Odostomia helena • †Odostomia minutissima – or unidentified comparable form • †Odostomia nemo • †Odostomia nota • †Odostomia stephensae • †Odostomia tacomoensis • †Odostomia tenuisculpta – or unidentified comparable form • †Oedolithax – type locality for genus • †Oedolithax mira – type locality for species • Oenopota • †Oenopota fidicula • sea snail †Oenopota tabulata'' • Ogmodontomys • †Ogmodontomys sawrockensis • †Olequahia • †Olequahia domenginica • †Olequahia lorenzana • †Oligoryctes • Oliva • †Oliva californica • †Oliva meganosensis – type locality for species • †Oliva spicata • Olivella • †Olivella baetica • †Olivella biplicata • †Olivella gracilis • †Olivella mathewsoni • †Olivella mathewsonii • †Olivella pedroana • †Olivella santana – type locality for species • †Omomys • †Omomys carteri – or unidentified comparable form • Oncorhynchus • , or saber-toothed salmon †Oncorhynchus rastrosus'' • Ondatra • †Ondatra idahoensis • †Ondatra minor • Oneirodes • Onthophagus • †Onthophagus everestae – type locality for species • Onychomys • †Onychomys gidleyi • †Onychomys torridus • Ophiodermella • †Ophiodermella graciosana • †Ophiodermella inermis • †Ophiomys • †Ophiomys parvus • †Opisima – tentative report • †Opisima pacifica – or unidentified comparable form • †Opisthonema • †Opisthonema palosverdensis – type locality for species • Oreamnos • †Oreamnos americanus • Oreortyx • †Oreortyx picta • Orthemis • †Orthemis ferruginea • Orthodon • †Osbornodon • †Osbornodon fricki • †Osteodontornis'' – type locality for genus • †Osteodontornis orri – type locality for species • Ostrea • †Ostrea angelica • †Ostrea atwoodii • †Ostrea bourgeosi • †Ostrea conchaphila • †Ostrea hertleini • †Ostrea lincolnensis – or unidentified related form • †Ostrea lurida • †Ostrea subtitan • †Ostrea weaveri • †Otodus'' • †Otodus angustidens • †Otodus megalodon • †Ottoceros • †Ottoceros peacevalleyensis – type locality for species • Otus • †Otus asio • †Ourayia • Ovibos • †Ovibos moschatus • Ovis • †Ovis canadensis • †Oxyrhina • †Oxyrhina crassa • †Oxyura • , or ruddy duck †Oxyura jamaicensis'' • †Ozymandias – type locality for genus • †Ozymandias gilberti – type locality for species ==P==

• †Pachycrommium • †Pachycrommium clarki • †Paciculus • †Pacifichelys • †Pacifichelys hutchisoni – type locality for species • †Pacipecten • †Pacipecten discus • †Pacipecten pabloensis – or unidentified comparable form • †Palaeolagus • †Palaeolama • †Palaeolama mirifica – or unidentified related form • †Palaeopsammia • †Palaeopsammia zitteli • †Palaeoxantusia • †Palaeoxantusia allisoni • †Palaeoxantusia kyrentos • †Paleoparadoxia'' • †Paleoparadoxia tabatai • †Paleosula – type locality for genus • †Paleosula stocktoni – type locality for species • Palpomyia – type locality for genus • †Palpomyia freyi – type locality for species • †Palpomyia multispinosa – type locality for species • †Palpomyia ryshkoffi – type locality for species • †Palpomyia shilo – type locality for species • Pandora • †Pandora punctata • †Pandora wardiana • †Panolax • †Panolax sanctaefidei • Panomya • †Panomya ampla • Panopea • †Panopea abrupta • †Panopea estrellana – or unidentified related form • †Panopea ramonensis • †Panopea smithii • †Panopea tenuis • Panthera • , or lion †Panthera leo'' • †Panthera onca – or unidentified comparable form • †Parabalaenoptera – type locality for genus • †Parabalaenoptera baulinensis – type locality for species • Paraconcavus • †Paraconcavus margaritanus • †Paraconcavus pacificus • †Paracontogenys • †Paracontogenys estesi • †Paracosoryx • †Paracosoryx alticornis • †Paracosoryx furlongi • †Paraculicoides – type locality for genus • †Paraculicoides rouseae – type locality for species • Paracyathus • †Paracyathus pedroensis – type locality for species • †Paracyathus stearnsii • †Paracynarctus • †Paracynarctus kelloggi • †Paradjidaumo • †Paradjidaumo reynoldsi – type locality for species • †Paradomnina • †Paradomnina relictus – or unidentified comparable form • †Parafundulus • †Parafundulus erdisi • †Parahippus'' • †Parahippus maxsoni – type locality for species • †Parahippus pawniensis • †Parahyus • †Paralichthyes • Paralichthys – type locality for genus • †Paralichthys antiquus • †Paramerychyus • †Paramerychyus harrisonensis • †Paramerychyus relictus • †Paramiolabis • †Paramiolabis minutus – type locality for species • †Paramiolabis singularis – or unidentified comparable form • †Paramiolabis taylori • †Paramiolabis tenuis • Paramylodon †Paramylodon • †Paramylodon harlani • †Paramys • †Paramys compressidens – or unidentified comparable form • †Paramys leptodus – or unidentified comparable form • †Parapavo • †Parapavo californica • †Parapavo californicus • †Parapliohippus • †Parapliohippus carrizoensis – type locality for species • (top) †Parapontoporia'' • †Parapontoporia sternbergi – type locality for species • †Parapontoporia wilsoni – type locality for species • †Parasauromalus • †Parasauromalus olseni • Paraseraphs • †Paraseraphs erraticus • †Parastylotermes • †Parastylotermes calico – type locality for species • †Parastylotermes frazieri – type locality for species • †Paratomarctus • †Paratomarctus temerarius • †Pareumys • †Pareumys grangeri • †Pareumys milleri • and calf †Parietobalaena'' • †Parietobalaena securis – type locality for species • †Paromomys • †Paromomys depressidens • †Paronychomys • †Parribacus • †Parribacus caesius – type locality for species • Parvamussium • †Parvicornus – type locality for genus • †Parvicornus occidentalis – type locality for species • Parvilucina • †Parvilucina approximata • †Parvilucina tenuisculpta • †Parvisipho – tentative report • †Parvisipho meganosensis – type locality for species • limpet Patelloida'' • †Patelloida tejonensis • †Patelloida triquetrus • Patinopecten • †Patinopecten caurinus • †Patinopecten coosensis • †Patinopecten healeyi • †Patinopecten healyi • †Patinopecten lohri • †Patinopecten propatulus • †Patriolestes • †Patriolestes novaceki – type locality for species • †Pauromys • †Pauromys lillegraveni – type locality for species • †Pecoripeda • Pecten • †Pecten bellus • †Pecten bowersi • †Pecten dickersoni • †Pecten estrellanis • †Pecten magnolia • †Pecten nevadensis • †Pecten perrini • †Pecten sespeensis • †Pedalion • †Pedalion panzana – or unidentified comparable form • †Pediomeryx • †Pediomeryx hemphillensis • †Pedipes • †Pedipes liratus • †Pedipes unisulcatus • †Pelagiarctos – type locality for genus • †Pelagiarctos thomasi – type locality for species • , with close-up insets of its pseudo-teeth †Pelagornis'' • Pelecanus • †Pelecanus erythrorhynchus – or unidentified comparable form • †Pelecanus occidentalis • †Peltosaurus • †Peltosaurus macrodon – type locality for species • Penitella • †Penitella penita • †Peraceras • †Peraceras superciliosum • †Peradectes • †Peradectes californicus • †Periaster • Pericosmus • †Peridiomys • †Peridiomys oregonensis – or unidentified comparable form • venus clam Periglypta'' • †Periglypta multicostata • Periploma • †Periploma planiuscula • †Periploma stewartvillensis – type locality for species • †Peripolocetus – type locality for genus • †Peripolocetus vexillifer – type locality for species • †Perissitys • †Perissitys stewarti • †Perissolax • †Perissolax blakei • †Perissolax tricarinatus • †Perognathoides • †Perognathoides eurekensis • pocket mouse Perognathus'' • †Perognathus furlongi • †Perognathus minutus • Peromyscus • †Peromyscus baumgartneri • †Peromyscus boylei • †Peromyscus complexus – type locality for species • †Peromyscus dentalis • †Peromyscus hagermanensis • †Peromyscus irvingtonensis – type locality for species • †Peromyscus maximus – type locality for species • †Peromyscus truei – or unidentified comparable form • †Perse • †Perse lincolnensis • Persea • †Persea coalingensis • †Persea praelingue • †Persea pseudocarolinensis • Persististrombus'' • †Persististrombus obliteratus – type locality for species • †Petauristodon • †Petauristodon jamesi • †Petauristodon mathewsi • †Petauristodon minimus • †Petauristodon uphami • Petricola • †Petricola carditoides • †Petricola cognata • †Petricola denticulata • †Petricola parallela • Petrophyllia • †Petrophyllia clarki • †Petrophyllia weaveri • †Pewelagus • †Pewelagus dawsonae • Phacoides • †Phacoides actulineatus • †Phacoides sactaecrucis – tentative report • Phalacrocorax • , or double-crested cormorant †Phalacrocorax auritus'' • †Phalacrocorax femoralis – type locality for species • †Phalacrocorax kennelli – type locality for species • †Phalacrocorax pelagicus • †Phalacrocorax penicillatus • †Phalacrocorax penincillatus • †Phalacrocorax penincullatus • †Phalacrocorax rogersi – type locality for species • Phalaropus • †Phalaropus fulicaria • †Phalaropus lobatus • †Phanaeus • †Phanaeus labreae – type locality for species • †Phelosaccomys • †Phelosaccomys shotwelli – type locality for species • †Phenacolemur • †Phenacolemur shifrae • †Phlaocyon'' • †Phlaocyon taylori • †Phlepsius • †Phlepsius weissmanae – type locality for species • Phloeodes • †Phloeodes diabolicus • †Phloeodes plicatus • †Phoberogale • †Phoberogale shareri – type locality for species • Phoca • †Phoca vitulina – or unidentified comparable form • Phocoena – or unidentified comparable form • †Phoebastria • †Phoebastria albatrus – type locality for species • †Phoebastria anglica – type locality for species • , or flamingos Phoenicopterus'' – or unidentified comparable form • Pholadidea • Pholadomya • †Pholadomya mounti • †Pholadomya nasuta • Pholas • †Pholas gabbi • Phos • †Phos blakianus – or unidentified comparable form • †Phos dumbleanus • †Photinia • †Photinia miocenica • , or horned lizard Phrynosoma'' • †Phyllites • †Phyllites californica • †Phyllites coalingensis • †Phyllites cordiaefolia – type locality for species • †Phyllites daturaefolia – type locality for species • †Phyllites domenginensis • †Phyllites ellipticus • †Phyllites laurinea • †Phyllites temblorensis • Phyllonotus • †Phyllonotus hippocastanum • †Phyllonotus radix • Physa'' • †Physiculua • Phytocrene • †Phytocrene sordida • Picea • †Picea lahontense • †Picea magna • †Picea sonomensis • †Pimelometopodon • †Pimelometopodon pulchrum – or unidentified comparable form • Pimelometopon • †Pimelometopon pulchrum • Pinna • †Pinna alamedaensis • †Pinna latrania – type locality for species • †Pinna lewisi • †Pinna llajasensis – type locality for species • †Pinna mendenhalli – type locality for species • †Pinnarctidion – type locality for genus • †Pinnarctidion bishopi – type locality for species • Pinus • †Pinus carmelensis – type locality for species • †Pinus muricata • †Pinus prelambertiana – or unidentified comparable form • †Pinus radiata • †Pinus sturgisii • †Pinus temblorensis • Piranga • †Piranga ludoviciana • †Piscolithax • venus clam Pitar'' • †Pitar avenalensis – tentative report • †Pitar behri • †Pitar california – or unidentified comparable form • †Pitar californiana • †Pitar campi – or unidentified comparable form • †Pitar dalli • †Pitar joaquinensis • †Pitar newcombianus • †Pitar quadratus • †Pitar stantoni – or unidentified comparable form • †Pitar tejonensis – or unidentified comparable form • †Pitar uvasana • †Pitar uvasanus • †Pithanodelphis • †Pithanotaria – type locality for genus • †Pithanotaria starri – type locality for species • Pituophis • , or pine snake †Pituophis melanoleucus'' • Pitymys • †Pitymys mcnowni – or unidentified comparable form • Placunanomia • †Placunanomia granti • Planularia • †Planularia caribbeana • †Platanophyllum • †Platanophyllum angustiloba • †Platanophyllum whitenyi • †Platanophyllum whitneyi • Platanus • †Platanus angustilobus – type locality for species • †Platanus appendiculata • †Platanus coloradensis • †Platanus dissecta – or unidentified comparable form • †Platanus paucidentata • of the genus Platygonus. Charles R. Knight (1922). †Platygonus • †Platygonus bicalcaratus • †Platygonus vetus • †Platylithax – type locality for genus • †Platylithax robusta – type locality for species • Platynus • †Platynus funebris – or unidentified comparable form • Platyodon • †Platyodon cancellata • †Platyodon cancellatus • †Platyoptera • †Platyoptera pacifica • Platytrochus • †Platytrochus diabloensis – type locality for species • †Platytrochus merriami – type locality for species • †Plectina • †Plectina garzaensis • †Plectina ruthenica – or unidentified comparable form • Plectofrondicularia • †Plectofrondicularia kerni • †Plectofrondicularia miocenica • †Plectofrondicularia packardi • †Plectofrondicularia trinitatensis • †Plectofrondicularia vaughani • †Plectrites • †Plectrites classeni • Plegadis • †Plegadis chihi • †Pleiolama • †Pleiolama vera • †Plesiadapis'' • †Plesiadapis anceps – or unidentified comparable form • †Plesiadapis churchilli – or unidentified comparable form • †Plesiogulo • †Plesiogulo lindsayi • †Plesiogulo marshalli • Pleurofusia • †Pleurofusia fresnoensis • †Pleurofusia lindavistaensis – or unidentified related form • †Pleuroncodes • †Pleuronichthys • †Pleuronichthys veliger • †Pliauchenia • †Pliauchenia magnifontis – or unidentified comparable form • †Plioceros • †Pliocyon • †Pliocyon medius • †Pliohippus'' • †Pliohippus coalingensis – type locality for species • †Pliohippus fairbanksi – type locality for species • †Pliohippus spectans – tentative report • †Pliometanastes • †Pliometanastes protistus • †Plionarctos • †Plionarctos edensis – type locality for species • †Plionictis • †Plionictis ogygia – or unidentified comparable form • †Pliopedia'' – type locality for genus • †Pliopedia pacifica – type locality for species • †Pliotaxidea • †Pliotaxidea garberi – type locality for species • †Pliotomodon • †Pliotomodon primitivus – type locality for species • †Plithocyon • †Plithocyon barstowensis • †Plotopterum – type locality for genus • †Plotopterum joaquinensis – type locality for species • Pluvialis • †Pluvialis squatarola • Pneumatophorus • †Pneumatophorus grex – or unidentified comparable form • †Poabromylus – tentative report • †Poabromylus robustus • , or cauliflower coral Pocillopora'' • Podiceps • †Podiceps arndti • †Podiceps auritus • †Podiceps discors • †Podiceps nigricolis • †Podiceps parvus • †Podiceps subparvus • Podilymbus • †Podilymbus podiceps • Pododesmus • †Pododesmus macrochisma • †Poebrodon • †Poebrodon californicus – type locality for species • †Pogonodon'' • †Pogonodon brachyops • Polinices • †Polinices – type locality for species informal • †Polinices draconis • †Polinices horni – or unidentified comparable form • †Polinices hornii • †Polinices lewisii • †Polinices pinyonensis – or unidentified comparable form • †Polinices recluzianys • †Polinices rectus – or unidentified related form • †Polinices susanaensis • †Polinices uber • †Polinices washingtonensis – or unidentified comparable form • Polydora • basket clam Polymesoda'' • †Polymesoda tenuis – or unidentified comparable form • Polystira • †Polystira barretti • †Pongamia • †Pongamia ovata – type locality for species • †Pontolis – or unidentified comparable form • †Pontolis magnus • Populus • †Populus alexanderii • †Populus bonhamii • †Populus coalingensis • †Populus garberii • Porichthys • †Porichthys myriaster • , or plainfin midshipman †Porichthys notatus'' • Porites • †Porites carrizensis – type locality for species • †Portunites • †Portunites insculpta • †Potamides • †Potamides carbonica – or unidentified comparable form • †Potamides sespeensis • †Praemancalla – type locality for genus • †Praemancalla lagunensis – type locality for species • †Presbychen – type locality for genus • †Presbychen abavus – type locality for species • †Presbymys • †Presbymys lophatus – type locality for species • Priene • †Priene amoldi • †Priene oregonensis • †Priene scotiaensis • Prionace • , or blue shark †Prionace glauca'' • †Priscoficus • †Priscoficus caudata • †Priscofusus • †Priscofusus carlsoni – tentative report • †Priscofusus hecoxi • †Priscofusus lincolnensis • †Priscofusus robustus • †Pristichampsus • Pristiophorus • †Pristophorus • †Proboscipeda • †Procamelus • †Procamelus grandis – or unidentified comparable form • †Procymophyes – type locality for genus • †Procymophyes lithax – type locality for species • †Procynodictis • †Procynodictis progressus • Procyon • †Procyon lotor • †Procyon psora • †Prodipodomys • †Prodipodomys idahoensis • †Prodipodomys riversidensis – type locality for species • †Prodipodomys timoteoensis – type locality for species • †Prodipoides • †Prodipoides lecontei – type locality for species • Progabbia • †Proharrymys – or unidentified comparable form • †Proheteromys • †Proheteromys maximus • †Proheteromys sulculus • †Promartes • †Pronotolagus • †Pronotolagus apachensis – or unidentified comparable form • †Protadjidaumo • †Protanthias – type locality for genus • †Protanthias fossilis – type locality for species • †Protepicyon • †Protepicyon raki – type locality for species • †Proterixoides • †Proterixoides davisi – type locality for species • †Prothomomys • †Prothomomys warrenensis – type locality for species • †Protitanops'' • †Protitanops curryi – type locality for species • †Protoarrenurus • †Protoarrenurus convergens – type locality for species • †Protochlorotettix – type locality for genus • †Protochlorotettix calico – type locality for species • †Protohepialus – type locality for genus • †Protohepialus comstocki – type locality for species • †Protolabis • †Protolabis barstowensis – type locality for species • †Protomarctus • †Protomarctus optatus • †Protoreodon • †Protoreodon pacificus – type locality for species • †Protoreodon parvus – or unidentified comparable form • †Protoreodon pumilus • †Protoreodon transmontanus • †Protoreodon walshi • †Protosciurus • †Protosciurus tecuyensis • †Protosegestes – report made of unidentified related form or using admittedly obsolete nomenclature • †Protosegestes lloydi – type locality for species • †Protospermophilus • †Protospermophilus quatalensis – type locality for species • †Protostrix • †Protostrix californiensis – type locality for species • †Protosurcula – tentative report • Protothaca • †Protothaca staleyi • †Protothore – type locality for genus • †Protothore explicata – type locality for species • †Protylopus'' • †Protylopus pearsonensis – type locality for species • †Protylopus petersoni – or unidentified comparable form • †Protylopus robustus – type locality for species • †Protylopus stocki – type locality for species • Proximitra – tentative report • †Proximitra cretacea • Prunus • †Prunus turlockensis • Psammacoma • †Psammacoma acolasta • †Psammacoma arctata • †Psammacoma yoldiformis • Psammotreta • †Psammotreta dombei • †Psammotreta obesa • †Psammotreta rostellata • †Psammotreta viridotincta • †Psephophorus'' • †Psephophorus calvertensis – or unidentified comparable form • †Pseudaelurus • †Pseudaelurus intrepidus • †Pseudaelurus marshi • †Pseudoblastomeryx • †Pseudoblastomeryx advena • Pseudochama • †Pseudochama exogyra • †Pseudoglandulina • †Pseudoglandulina conica • †Pseudoglandulina ovata • †Pseudoglandulina turbinata • Pseudoliva • †Pseudoliva dilleri • †Pseudoliva inornata – or unidentified comparable form • sea snail Pseudomelatoma'' • †Pseudomelatoma penicillata • †Pseudoparablastomeryx • †Pseudoparablastomeryx scotti – or unidentified comparable form • †Pseudoparella • †Pseudoperrisolax • †Pseudoperrisolax blakei • †Pseudoseriola – type locality for genus • †Pseudoseriola gillilandi – type locality for species • †Pseudotheridomys • †Pseudotheridomys cuyamensis – type locality for species • †Pseudotomus • †Pseudotomus californicus • †Pseudotomus littoralis – type locality for species • , or Douglas firs †Pseudotsuga'' • †Pseudotsuga sonomensis • Pteria • †Pteria berryi • †Pteria hertleini • †Pteria pellucida • †Pteroplatea • †Pteroplatea lapislutosa – type locality for species • Pteropurpura • †Pteropurpura festiva • †Pteropurpura trialatus • Pterostichus • Pterynotus • †Pterynotus petri • †Pterynotus washingtonicus • †Ptilodus'' • Ptinus • †Ptinus priminidi – type locality for species • Ptychoramphus • †Ptychoramphus aleuticus • Puffinus • †Puffinus barnesi – type locality for species • †Puffinus calhouni – type locality for species • †Puffinus diatomicus – type locality for species • †Puffinus felthami – type locality for species • †Puffinus gilmorei – type locality for species • †Puffinus gresus • †Puffinus grisesus • †Puffinus griseus • †Puffinus inceptor – type locality for species • †Puffinus kanakoffi • †Puffinus mitchelli – type locality for species • †Puffinus opisthomelas • †Puffinus priscus – type locality for species • †Puffinus tenuirostris • Pullenia • †Pullenia eocenica • †Pullenia quinqueloba • †Puma'' • †Puma concolor – type locality for species • Puncturella • †Puncturella galeata • †Puncturella multistriata • Pupillaria • †Pupillaria optabilis • †Pupillaria pupilla • Purpura • †Purpura barbarensis • †Purpura festiva • †Purpura lima • †Purpura lurida • †Purpura milicentana – type locality for species • †Purpura nuttallii • †Purpura poulsoni • †Purpura topangensis • false cowrie sea snail Pusula'' • †Pusula californiana • †Pusula solandri • Pycnodonte • †Pycnodonte eldridgei • †Pycnodonte heermanni • †Pycnodonte pacifica – or unidentified comparable form • †Pycnodonte stewarti – or unidentified related form • Pyramidella • †Pyramidella adamsi – or unidentified comparable form • †Pyramidella mucronis • †Pyramidella preblei • Pyrene • †Pyrene carinata ==Q==

• †Quercophyllum • †Quercophyllum platanoides – type locality for species • , or oak tree Quercus'' • †Quercus acorns • †Quercus coalingensis • †Quercus dispersa • †Quercus distincta • †Quercus domenginensis • †Quercus douglasoides • †Quercus eoxalapensis – type locality for species • †Quercus hannibali • †Quercus hannibalii • †Quercus lakevillensis • †Quercus merriami • †Quercus nevadensis • †Quercus pasadorii – type locality for species • †Quercus pliopalmerii • †Quercus pollardiana • †Quercus pseudolyrata • †Quercus remingtonii • †Quercus sayana • †Quercus simulata • †Quercus temblorensis • †Quercus wislizenoides ==R==

• Raja • †Rakomeryx • †Rakomeryx sinclairi – type locality for species • Rallus • †Rallus limicola • and Cosoryx. Robert Bruce Horsfall (1913). †Ramoceros'' • †Ramoceros brevicornis – type locality for species • †Rana • †Ranellina • †Ranellina pilsbry – or unidentified related form • Raninoides • †Raninoides slaki – type locality for species • †Rapamys • †Rapamys fricki – type locality for species • Rapana • †Rapana vaquerosensis • †Rectoguembelina • †Rectoguembelina trinitatensis – or unidentified comparable form • , or avocet Recurvirostra'' • Reithrodontomys • †Reithroparamys – or unidentified comparable form • Reophax • †Reophax pilulifer – or unidentified comparable form • †Repomys • †Repomys gustelyi – type locality for species • †Repomys maxumi – type locality for species • Reticulitermes • †Reticulitermes laurae – type locality for species • †Reticulitermes tibalis • Reticutriton • †Reticutriton elsmerensis • †Retipirula • †Retipirula crassitesta • barrel bubble sea snail Retusa'' • †Retusa carinata • †Retusa culcitella • †Retusa harpa • †Retusa tantilla • †Reynoldsomys • †Reynoldsomys timoteoensis – type locality for species • †Rhabdammina • †Rhabdammina eocenica • †Rhamnidium • †Rhamnidium chaneyi • †Rhamnus • †Rhamnus calyptus • †Rhamnus moragensis • †Rhamnus plenus • †Rhamnus precalifornica • †Rhomarchus – type locality for genus • †Rhomarchus ensiger – type locality for species • †Rhomurus • †Rhomurus fulcratus • Rhus • †Rhus diablana • †Rhus mixta • †Rhynchotherium'' • †Rhynchotherium falconeri • †Rhynconella – tentative report • †Rhyssomatus • †Rhyssomatus miocenae – type locality for species • †Rhythmias • †Rhythmias gaviotae – type locality for species • †Rhythmias slarri • Rimella • †Rimella macilentus • †Rimella supraplicata • †Rimella supraplicatus • Rissa • †Rissa estesi – type locality for species • †Rissa tridactyla • Rissoina • †Rissoina pleistocena • †Robinia'' • †Robinia californica • Robulus • †Robulus alatolimbatus • †Robulus arcuatostriatus • †Robulus clericii • †Robulus clypeiformis – or unidentified comparable form • †Robulus inornatus • †Robulus insuetus • †Robulus kincaidi • †Robulus mayi • †Robulus mexicanus • †Robulus nikobarensis • †Robulus propinquus • †Robulus simplex • †Robulus terryi – or unidentified comparable form • †Robulus warmani • †Robulus welchi • †Rogenio • †Rogenio bowersi • †Rogenio solitudinis • †Rogenio vanclevei – type locality for species • †Rotularia • †Rotularia tejonense • †Russellagus ==S==

• , or palmettos Sabal'' • †Sabal miocenica • †Sabalites • †Sabalites californicus • Saccella • †Saccella alaeformis • †Saccella gabbi • †Saccella taphria • Sagmatias • †Sainguinolaria • †Sainguinolaria toulai – or unidentified comparable form • Salix • †Salix boisiensis • †Salix edenensis • †Salix hesperia • †Salix ionensis • †Salix laevigatoides • †Salix pelviga • †Salix storeyana • †Salix wildcatensis • †Salumiphocaena • †Salumiphocaena stocktoni – type locality for species • †Saniwa'' • †Saniwa ensidens – type locality for species • †Sapindus • †Sapindus oklahomensis • Saracenaria – tentative report • †Saracenaria acutiauricularis – or unidentified comparable form • †Sarda • †Sarda stockii – type locality for species • Sassia • †Sassia bilineata • Saxidomus • †Saxidomus gigantea • †Saxidomus giganteus • †Saxidomus nuttalli • †Saxidomus vaquerosensis • †Saxolucina • †Scaldicetus'' • †Scaldicetus grandis – or unidentified comparable form • †Scalopoides • Scapanus • †Scapanus latimanus • †Scapanus malatinus • †Scapanus shultzi – type locality for species • Scaphander • †Scaphander costatus • †Scaphander jugularis • Scapharca • †Scapharca obispoana • Scaphinotus • †Scaphinotus interruptus • †Scaphohippus'' • †Scaphohippus intermontanus – type locality for species • †Scaphohippus sumani – type locality for species • Sceloporus • †Sceloporus occidentalis • †Scenopagus • †Scenopagus curtidens • †Scenopagus priscus – or unidentified comparable form • †Schaubeumys • †Schedocardia – tentative report • †Schistomerus – type locality for genus • †Schistomerus californense – type locality for species • Schizaster • †Schizaster diabloensis • †Schizaster lecontei • †Schizaster martinezensis • †Schizodontomys • †Sciuravus • †Sciuravus powayensis • Sciurus • Scomber • †Scomber sanctaemonicae • †Scomberesox • †Scomberesox acutillus – type locality for species • †Scomberesox edwardsi – type locality for species • ridgehead Scopelogadus'' • †Scopelogadus mizolepis • †Scutella • †Scutella fairbanksi • †Scutella fairbanski • †Scutella merriami • †Scutella norrisi • †Scutella vaquerosensis • †Scutellaster • catsharks Scyliorhinus'' • †Scymnorhinus • †Scymnorhinus occidentalis • Searlesia • †Searlesia dira • †Sebastavus – type locality for genus • †Sebastavus vertebralis – type locality for species • †Sebastodes • †Sebastodes apostates • †Sebastodes haroldi – type locality for species • †Sebastodes ineziae • †Sebastodes porteousi • †Sebastodes porteus • †Sebastodes rosae • Seila • †Seila montereyensis • Semelangulus • †Semelangulus tenuilirata • Semele – tentative report • Semele • †Semele decisa • †Semele diabloi • †Semele morani • †Semele packardi • †Semele pulchra • †Semele rubropicta • †Semele venusta • Semicassis • †Semicassis louella – type locality for species • †Semicassis tuberculiformis • Semicossyphus • †Semirostrum – type locality for genus • †Semirostrum ceruttii – type locality for species • Septifer • †Septifer bifurcatus • †Sequoiadendron'' • †Sequoiadendron chaneyi • †Serbelodon • †Serbelodon burnhami • Serica • †Serica kanakoffi – type locality for species • Seriola • †Seriola sanctaebarbarae • Seriphus • †Seriphus politus • Serpula • †Serpula coreyi • Serpulorbis • †Serpulorbis llajasensis • †Sespedectes • †Sespedectes singularis – type locality for species • †Sespedectes stocki • †Sespemys • †Sespemys thurstoni – type locality for species • †Sespia'' • †Sespia californica – type locality for species • †Sespia nitida • Siderastrea • †Siderastrea clarki – type locality for species • †Siderastrea mendenhalli – type locality for species • Sigmodon • †Sigmodon lindsayi • †Sigmodon minor • Sigmoilina – tentative report • Siliqua • †Siliqua lucida • †Siliqua media – or unidentified comparable form • †Siliqua patula – or unidentified related form • †Simiacritomys • †Simiacritomys whistleri – type locality for species • †Simidectes • †Simidectes medius – or unidentified comparable form • †Simidectes merriami – type locality for species • †Simimeryx • †Simimeryx hudsoni – type locality for species • †Simimys • †Simimys landeri – type locality for species • †Simimys simplex • Simomactra • †Simomactra dolabriformis • †Simomactra falcata • †Simomactra planulata • †Sinomactra • †Sinomactra falcata • moon snail Sinum'' • †Sinum debile – or unidentified comparable form • †Sinum obliquum • †Sinum scopulosum • Siphonalia • †Siphonalia andersoni • †Siphonalia lineata • †Siphonalia merriami • †Siphonalia sutterensis – or unidentified comparable form • Skenea • †Skenea californica • †Smilax • †Smilax diforma • †Smilax labidurommae • †Smilax magna – or unidentified comparable form • †Smilax remingtonii • †Smilodon'' • †Smilodon fatalis • †Smilodon gracilis • †Smilodonichthyes • †Smilodonichthyes rastrosus • †Smilodonichthys • †Smilodonicthyes • †Smilodonicthyes rastrosus • †Smithites – type locality for genus • †Smithites elegans – type locality for species • Solariella • †Solariella hartleyensis – type locality for species • †Solariella peramabilis • †Solariella walkeri – type locality for species • Solemya'' • †Solemya ventricosa • Solen • †Solen curtis – or unidentified comparable form • †Solen rosaceus • †Solen sicarius • Solena • †Solena conradi • †Solena gravidus • †Solena lorenzana • †Solena parallelus – or unidentified comparable form • †Solena perrini • †Solena stantoni • †Solena subverticala • Solenastrea • †Solenastrea fairbanksi • Solenosteira • †Solenosteira anomala • , or long-tailed shrew Sorex'' • †Sorex leahyi • Spathipora • Spermophilus • †Spermophilus argonautus • †Spermophilus beecheyi • †Spermophilus lateralis • †Sphaeroidina • †Sphaeroidina gredalensis • Sphenia – tentative report • †Sphenia meganosensis – type locality for species • †Sphenophalos – tentative report • hammerhead shark Sphyrna'' • †Sphyrna aus • †Sphyrna bus • Spilogale • †Spilogale putorius • †Spirocrypta • †Spirocrypta inornata • †Spirocrypta pileum • Spiroglyphus • †Spiroglyphus lituella • †Spiroglyphus tinajasensis • Spiroloculina • †Spiroloculina lamposa • Spiroplectammina • †Spiroplectammina coreyi – type locality for species • †Spiroplectammina eocenica • †Spiroplectammina kewi – type locality for species • Spirotropis • †Spirotropis bulimoides • †Spirotropis perversa • , or surf clam Spisula'' • †Spisula coosensis • †Spisula densatum – type locality for species • †Spisula meganosensis – type locality for species • †Spisula pabloensis • †Spisula packardi • †Spisula panzanum • Spondylus • †Spondylus bostrychites • †Spondylus calcifer • †Spondylus carlosensis • †Spondylus perrini • †Spondylus vaquerosensis • , or spurdog Squalus'' • †Squalus sericulus • †Squalus serriculus • Squatina • †Squatina californica – or unidentified comparable form • †Squatina claifornica • †Squatina lerichei • Squilla • †Squilla laingae • †Starrias – type locality for genus • †Starrias ischyrus – type locality for species • †Stegomastodon'' • †Stegomastodon mirificus – or unidentified comparable form • Stenella • †Stenomylus • †Stenomylus hitchcocki – or unidentified comparable form • Stenoplax • †Stenoplax conspicua • †Stenoplax magdalenensis • Stephanodiscus • †Stephanodiscus asteroides • †Stephanodiscus carconensis • †Stephanodiscus excentricus • †Stephanodiscus hantzchii • †Stephanodiscus hantzschii • †Stephanophyllia • †Stephanophyllia californica – type locality for species • †Stephanophyllia vacavillensis • Stercorarius • Sterna • †Sterna neglecta • †Sternbergia – type locality for genus • †Sternbergia waitei – type locality for species • Sthenictis • †Stichocassidulina • †Stichocassidulina thalmanni • †Stictocarbo • †Stictocarbo kumeyaay – type locality for species • †Stockia – type locality for genus • †Stockia powayensis – type locality for species • †Stockoceros'' – or unidentified comparable form • Stomias • †Stomias affinis • Stramonita • †Stramonita biserialis • †Stramonita canaliculata • †Stramonita imperialis • †Strepsidura • †Strepsidura diabloensis – type locality for species • †Strepsidura ficus – tentative report • †Strepsidura lincolnensis • †Streptochetus • †Streptochetus californiana – type locality for species • †Striatolamia'' • †Striatolamia macrota • †Striostrea • †Striostrea freudenbergi • Strioterebrum • †Strioterebrum gausapatum • †Strobilites • †Strobilites temblorensis • Strombiformis • †Strombiformis raymondi • Strombus • †Strombus galeatus • †Strombus gracilior • †Strongyliscus – type locality for genus • †Strongyliscus robustus – type locality for species • Strongylocentrotus • †Strongylodon • †Strongylodon falcata • Strophocardia • †Strophocardia megastropha • Sturnella • †Sturnella negecta • †Stylemys • †Stylemys neglectus – type locality for species • Subcancilla • †Subcancilla sulcata • . Charles R. Knight (1890s). †Subhyracodon'' • †Subhyracodon kewi • Succinea • †Suggrunda • Sula • †Sula clarki – type locality for species • †Sula pohli – type locality for species • †Sula willetti – type locality for species • †Sulcocypraea • †Sulcocypraea moumieti • Sulcoretusa • †Sulcoretusa xystrum • Surculites • †Surculites aequilateralis • †Surculites carpentaria • †Surculites carpenteriana • †Surculites carpenterianus • †Surculites isoformis • †Surculites keepi – or unidentified comparable form • †Surculites mathewsoni • †Surculites mathewsonii • †Surculites remondi • †Surculites remondii • †Surculities – tentative report • †Syllomus – or unidentified comparable form • †Syllomus aegyptiacus • Sylvilagus • †Sylvilagus audubonii • †Sylvilagus bachmani • †Sylvilagus floridanus • †Sylvilagus hibbardi • Syncera • †Syncera translucens • pipefish Syngnathus'' • †Syngnathus avus – type locality for species • †Synthiboramphus • †Synthiboramphus antiquus • Synthliboramphus • †Synthliboramphus antiquus • †Synthliboramphus hypoleucas • †Synthliboramphus hypoleucus • †Synthliboramphus rineyi – type locality for species • †Synthliboraramphus • †Synthliboraramphus antiquus ==T==