List of the Cenozoic life of Wyoming

• †Aaptoryctes • †Aaptoryctes ivyi • †Absarokius • †Absarokius abbotti • †Absarokius gazini – type locality for species • †Absarokius metoecus – type locality for species • †Abuta – or unidentified related form • †Acacia • †Acacia lamarensis • †Acacia macrosperma • †Acacia wardii • †Acarictis • †Acarictis ryani – type locality for species • Accipiter • , or northern goshawk Accipiter gentilis'' • †Accipiter striatus • Acer • †Acer lesquereuxi • †Acer newberryi • †Acer silberlingii • †Acer vivarium • †Aceroryctes – type locality for genus • †Aceroryctes dulcis – type locality for species • †Achaenodon • †Achaenodon insolens – type locality for species • †Achaenodon robustus – type locality for species • †Acidomomys – type locality for genus • †Acidomomys hebeticus – type locality for species • †Acmeodon • †Acmeodon secans • †Acocephalus • †Acocephalus adae – type locality for species • †Acritoparamys • †Acritoparamys atavus • †Acritoparamys atwateri • †Acritoparamys francesi • †Acritoparamys wyomingensis • , or leather fernsAcrostichum'' • †Acrostichum hesperium • †Adilophontes – type locality for genus • †Adilophontes brachykolos – type locality for species • †Adjidaumo • †Adjidaumo burkei – tentative report • †Adjidaumo craigi – or unidentified comparable form • †Adjidaumo minimus • †Adocus'' • †Adunator • †Adunator fredericki • †Adunator ladae • †Adunator martinezi • Aegialia • †Aegialia rupta – type locality for species • Aegolius • †Aegolius acadicus • Aegolius funereus • , or the long-necked camel. Heinrich Harder (1920). †Aepycamelus'' • †Aerugoamnis – type locality for genus • †Aerugoamnis paulus – type locality for species • †Aesculus • †Aesculus antiquorum • †Aesculus hickeyi • †Afairiguana – type locality for genus • †Afairiguana avius – type locality for species • †Ageina • †Ageina tobieni • †Ageitodendron • †Ageitodendron matthewi • Agelaius • †Agelaius phoeniceus • †Agnotocastor • †Agnotocastor galushai – type locality for species • †Agriochoerus'' • †Agriochoerus maximus • †Agriochoerus minimus – or unidentified comparable form • Ailanthus • †Ailanthus lesquereuxi • †Alagomys • †Alagomys russelli – type locality for species • †Alastor • †Alastor solidescens – type locality for species • †Albertanella – or unidentified comparable form • †Albertanella minuta • Alces • †Alces alces • †Aletodon • †Aletodon conardae – type locality for species • †Aletodon gunnelli – type locality for species • †Aletodon quadravus • †Aletomeryx'' • †Aletomeryx gracilis • †Aletornis – type locality for genus • †Aletornis bellus – type locality for species • †Aletornis gracilis – type locality for species • †Aletornis nobilis – type locality for species • †Aletornis pernix – type locality for species • †Aletornis venustus – type locality for species • Aleurites • †Aleurites glandulosa • †Alismaphyllites • †Alismaphyllites grandifolius • †Allantodiopsis • †Allantoidiopsis erosa • †Allognathosuchus'' • †Allognathosuchus heterodon • †Allognathosuchus polyodon • †Allognathosuchus wartheni – type locality for species • †Allomys • †Allomys cristabrevis • †Allophylus • †Allophylus flexifolia • Alnus • †Alphagaulus • †Alphagaulus vetus • †Alticonus • †Alticonus gazini • †Alveojunctus • †Alveojunctus minutus • †Alveugena • †Alveugena carbonensis – type locality for species • †Amaramnis • †Amaramnis gregoryi – type locality for species • †Ambloctonus • †Ambloctonus major • †Ambloctonus priscus – or unidentified comparable form • †Ambloctonus sinosus • †Ameiseophis • †Ameiseophis robinsoni – type locality for species • †Amelotabes – type locality for genus • †Amelotabes simpsoni – type locality for species • , or catkin-yew Amentotaxus'' • †Amentotaxus campbelli • Amia • †Amia fragosa • †Amitabha – type locality for genus • †Amitabha urbsinterdictensis – type locality for species • †Ampelopsis • †Ampelopsis acerifolia • †Amphechinus • †Amphechinus ellicottae – type locality for species • †Amphigyion • †Amphigyion straitae • †Amphilemur • †Amphiplaga • Amphiuma • †Amphiuma jepseni – type locality for species • †Ampliconus • †Ampliconus antoni – type locality for species • Amyda'' • †Amyda egregia – type locality for species • †Amyda exquisita – type locality for species • †Amyda mira – type locality for species • †Amynodon • †Amynodon advenus • †Anacardites • †Anacardites schinoloxus • Anaclinia – tentative report • †Anacodon • †Anacodon nexus – type locality for species • †Anacodon ursidens • Anamirta – or unidentified comparable form • †Anamirta milleri • †Anaptomorphus • †Anaptomorphus aemulus – type locality for species • †Anaptomorphus westi – type locality for species • Anas • †Anas acuta • , or northern shoveler Anas clypeata'' • †Anas crecca • Anas platyrhynchos • †Anas schneideri – type locality for species • †Anatella • †Anatella tacita – type locality for species • †Anconodon • †Anconodon cochranensis • †Anconodon gidleyi • †Anemia • †Anemia elongata • †Anemorhysis • †Anemorhysis natronensis – type locality for species • †Anemorhysis pattersoni – type locality for species • †Anemorhysis sublettensis – type locality for species • †Anemorhysis wortmani – type locality for species • †Anilioides • †Anilioides nebraskensis • †Anisonchus • †Anisonchus sectorius • †Anisonchus willeyi – type locality for species • †Ankylodon • †Ankylodon annectens – or unidentified comparable form • †Anniealexandria – type locality for genus • †Anniealexandria gansi – type locality for species • Anobium • †Anobium deceptum – type locality for species • †Anobium lignitum – type locality for species • †Anobium ovale – type locality for species • †Anolbanolis – type locality for genus • †Anolbanolis banalis – type locality for species • †Anolbanolis geminus – type locality for species • †Anomoemys • †Anomoemys lewisi • †Anosteira'' • †Anosteira ornata • †Anosteira radulina – type locality for species • †Anosteira trionychoides • †Antherophagus • †Antherophagus priscus – type locality for species • Anthonomus • †Anthonomus revictus – type locality for species • †Anthonomus soporus – type locality for species • †Antiacodon • †Antiacodon pygmaeus – type locality for species • †Antiacodon vanvaleni – type locality for species • †Antiacodon venustus – type locality for species • , or pronghorn Antilocapra'' • †Antilocapra americana • Apalone • †Apalone extensa – type locality for species • †Apalone heteroglypta – type locality for species • †Apalone postera – type locality for species • †Apatemys • †Apatemys bellulus – type locality for species • †Apatemys bellus • †Apatemys chardini – or unidentified comparable form • †Apatemys hendryi – type locality for species • †Apatemys rodens • †Aphaena • †Aphaena rotundipennis – type locality for species • †Apheliscus – type locality for genus • †Apheliscus chydaeus – type locality for species • †Apheliscus insidiosus • †Apheliscus nitidus • †Apheliscus wapitiensis – type locality for species • †Aphelops • †Aphelops megalodus • †Aphronorus • †Aphronorus fraudator • †Aphronorus orieli – type locality for species • †Aphronorus ratatoski – type locality for species • †Apodosauriscus – type locality for genus • †Apodosauriscus minutus – type locality for species • †Apodosauriscus thermophilus – type locality for species • †Apriculus • †Apriculus praeteritus – type locality for species • †Apternodus • †Apternodus brevirostris – type locality for species • †Apternodus dasophylakas – type locality for species • †Apternodus gregoryi – type locality for species • †Apternodus iliffensis • †Apternodus major – type locality for species • Aquila • †Aquila antiqua – type locality for species • , or golden eagle Aquila chrysaetos'' • Aralia • †Aralia notata • †Aralia serrulata • †Aralia wrightii • †Araliophyllum • †Araliophyllum quina • Araneus • †Arapahovius • †Arapahovius advena – type locality for species • †Arapahovius gazini – type locality for species • Araucaria • †Araucaria longifolia • †Archaeocyon • †Archaeocyon falkenbachi • †Archaeocyon leptodus • †Archaeolagus • †Archaeolagus emeraldensis • †Archaeotherium'' • †Archaeotherium minimus • †Archaeotherium mortoni • †Archaeotherium palustris – type locality for species • †Archaerhineura – type locality for genus • †Archaerhineura mephitis – type locality for species • Arcoa • †Arcoa lindgreni – type locality for species • †Arctocyon • †Arctocyon ferox • †Arctocyon mumak • †Arctodontomys • †Arctodontomys nuptus • †Arctodontomys simplicidens • †Arctodontomys wilsoni – type locality for species • , or short-faced bear, with a human to scale †Arctodus'' • †Arctodus simus • †Arctostaphylos • †Arctostaphylos elliptica • †Arctostylops • †Arctostylops steini • †Arecipites • †Arecipites tenuiexinous • †Arenahippus • †Arenahippus aemulor – type locality for species • †Arenahippus pernix – type locality for species • †Arfia • †Arfia junnei • †Arfia opisthotoma • †Arfia shoshoniensis • †Arfia zele – type locality for species • Aristolochia • †Aristolochia mortua • †Armintodelphys • †Armintodelphys blacki • †Armintodelphys dawsoni • †Armintomys • †Armintomys tullbergi • †Arpadosaurus – type locality for genus • †Arpadosaurus gazinorum – type locality for species • †Arpadosaurus sepulchralis – type locality for species • †Artimonius • †Artimonius nocerai • †Artimonius witteri • Artocarpus – tentative report • †Artocarpus quercoides • †Asarkina • †Asarkina quadrata – type locality for species • †Asiabradypus – or unidentified comparable form • Asio • †Asio flammeus • Asio otus • †Asplenium • †Asplenium delicatula • †Asplenium eoligniticum • †Asplenium eolignitum • †Asplenium erosum • †Asplenium iddingsi • †Asplenium remotidens • †Astephus • †Asterotrygon • stingray †Asterotrygon maloneyi'' • Astronium • †Astronium truncatum • †Athyana • †Athyana balli • †Aulolithomys • †Aulolithomys bounites • †Aulolithomys vexilliames – type locality for species • †Auroralestes • †Auroralestes simpsoni • †Auxontodon • †Averrhoites • †Averrhoites affinis • †Avunculus • †Avunculus didelphodonti – or unidentified comparable form • †Axestemys – type locality for genus • †Axestemys byssina – type locality for species • †Axestemys cerevisia – type locality for species • †Axestemys salebrosa – type locality for species • †Axestemys uintaensis – type locality for species • †Aycrossia • †Aycrossia lovei • Aythya • Aythya collaris • Azolla • †Azolla cretacea • †Azygonyx • †Azygonyx ancylion – type locality for species • †Azygonyx grangeri • †Azygonyx xenicus – type locality for species ==B==

• †Babibasiliscus – type locality for genus • †Babibasiliscus alxi – type locality for species • †Baena • †Baena arenosa – type locality for species • †Bahndwivici – type locality for genus • †Bahndwivici ammoskius – type locality for species • †Baioconodon • †Baioconodon denverensis – or unidentified comparable form • †Baioconodon middletoni – type locality for species • †Baioconodon nordicus • †Baioconodon wovokae • †Baiotomeus • †Baiotomeus douglassi • †Baiotomeus lamberti • †Baltemys – type locality for genus • †Baltemys staurogastros – type locality for species • †Baptemys • †Baptemys wyomingensis – type locality for species • †Barbouromeryx – or unidentified comparable form • †Barylambda'' • †Barylambda churchilli – type locality for species • †Barylambda faberi • †Bathornis • †Bathornis fricki – type locality for species • †Bathygenys • †Bathygenys alpha • †Bathygenys hedlundae • †Bathyopsis • †Bathyopsis fissidens • †Batodonoides'' • †Batodonoides vanhouteni – type locality for species • †Batrachosauroides – tentative report • Bauhinia • †Bauhinia wyomingana • †Bauhinia wyomingiana • †Beilschmiedia • †Beilschmiedia eocenica • †Berchemiopsis • †Berchemiopsis paucidentata • †Beringiaphyllum • †Beringiaphyllum cupanioides • †Berosus • †Berosus sexstriatus – type locality for species • †Berosus tenuis – type locality for species • †Bessoecetor • †Bessoecetor septentrionalis • Betula • †Betula iddingsi • †Betula stevensoni • †Betula stevensonii • Biomphalaria • Bison • †Bison bison'' • †Bisonalveus – type locality for genus • †Bisonalveus browni – type locality for species • †Bisonalveus holtzmani – type locality for species • †Blechnum • †Blechnum anceps • Bledius • †Bledius adamus – type locality for species • †Bledius faecorum – type locality for species • †Blickomylus • †Blickomylus galushai • †Boavus'' – type locality for genus • †Boavus brevis – type locality for species • †Boavus idelmani – type locality for species • †Boavus occidentalis – type locality for species • Boletina • †Boletina paludivaga – type locality for species • †Boletina umbratica – type locality for species • †Bootherium • †Bootherium bombifrons • †Borealosuchus • †Borealosuchus formidabilis • †Borealosuchus wilsoni – type locality for species • †Botauroides – type locality for genus • †Botauroides parvus – type locality for species • †Bouromeryx • †Boverisuchus • †Boverisuchus vorax • †Bownomomys – type locality for genus • †Bownomomys americanus – type locality for species. Formerly known as Teilhardina americana. • †Bownomomys crassidens – type locality for species. Formerly known as Teilhardina crassidens. • †Boysia – or unidentified comparable form • †Boysia phenacodorum • †Brachianodon • †Brachianodon westorum – type locality for species • †Brachycrus'' • †Brachycrus rusticus • †Brachycrus sweetwaterensis • †Brachycrus vaughani • †Brachyerix • †Brachyerix macrotis • †Brachyhyops • †Brachyhyops viensis • †Brachyhyops wyomingensis – type locality for species • †Brachyrhynchocyon • †Brachyrhynchocyon dodgei • †Brachyrhynchocyon intermedius • †Brachyuranochampsa – type locality for genus • †Brachyuranochampsa eversolei – type locality for species • Bracon • †Bracon laminarum – type locality for species • Branta • , or Canada goose †Branta canadensis'' • †Bridgeremys • †Bridgeremys pusilla – type locality for species • †Brontops • †Browniea • †Browniea serrata • †Bryophyte – or unidentified related form • Bubo • †Bubo virginianus • †Bunophorus • †Bunophorus etsagicus • †Bunophorus grangeri • †Bunophorus macropternus • †Bunophorus robustus • †Bunophorus sinclairi – type locality for species • †Bunrsera • †Bunrsera inaequalateralis • Buteo • †Buteo jamaicensis • †Buteo lagopus • †Buteo regalis – or unidentified comparable form • Buteogallus'' ==C==

• †Caedocyon • †Caedocyon tedfordi – type locality for species • †Caenolambda – type locality for genus • †Caenolambda jepseni – type locality for species • †Caenolambda pattersoni – type locality for species • . Charles R. Knight (1890s). †Caenopus'' • †Caenopus yoderensis – type locality for species • †Caesalpinia • †Caesalpinia flumen-viridensis • †Caesalpinia pecorae • †Caesalpinites • †Caesalpinites falcata – type locality for species • †Calamagras • †Calamagras angulatus – or unidentified comparable form • †Calamagras platyspondyla • †Calamagras primus – type locality for species • †Calamagras weigeli • †Calamospiza • †Calamospiza melanocorys • †Calandrites • †Calandrites cineratius • †Calandrites defessus • †Calcardea – type locality for genus • †Calcardea junnei – type locality for species • Calidris • , or pectoral sandpiper †Calidris melanotos'' • †Callomyia • †Callomyia torporata – type locality for species • †Callospilopteron – type locality for genus • †Callospilopteron ocellatum – type locality for species • †Calycites • †Calycites ardtunensis • †Calycites hexaphylla • †Calycites mikanoides • †Calycites polysepala • †Calycites RR58 informal • †Calycites RR71 informal • †Camelops • †Camelops hesternus – or unidentified comparable form • †Canarium • †Canarium californicum • †Canavalia • †Canavalia diuturna • Canis • , the grey wolf, to scale with a fossilized skeleton of the Pleistocene wolf Canis dirus, or dire wolf †Canis dirus'' • †Canis latrans • †Canis lupus • †Cantius • †Cantius abditus – type locality for species • †Cantius frugivorus • †Cantius mckennai • †Cantius nunienus • †Cantius ralstoni • †Cantius simonsi – type locality for species • †Cantius torresi • †Cantius trigonodus – type locality for species • †Capacikala • †Capacikala parvus – type locality for species • Capella • †Capella gallinago • †Carabites • †Carabites kincaidi – type locality for species • Caracara • , or southern crested caracara †Caracara plancus'' • †Cardichelyon – type locality for genus • †Cardichelyon rogerwoodi – type locality for species • †Cardiolophus • †Cardiolophus radinskyi – type locality for species • †Cardiolophus semihians • Cardiospermum • leaf †Cardiospermum coloradensis'' • Carduelis • †Carpites • †Carpites newberryana • †Carpites pedunculatus • †Carpites verrucosus • †Carpodaptes • †Carpodaptes hazelae • †Carpodaptes hobackensis • †Carpodaptes jepseni • †Carpodaptes rosei • †Carpodaptes stonleyi • †Carpolestes • †Carpolestes dubius – type locality for species • †Carpolestes nigridens • †Carpolestes twelvemilensis – type locality for species • †Carpolestes simpsoni'' – type locality for species • †Carpolithes • †Carpolithes osseus • Carya • †Carya antiquorum • †Carya veripites • †Carya viridifluminipites • Castanea • †Castanea intermedia • †Castanea pulchella • Castor • †Castor peninsulatus • †Catopsalis • †Catopsalis alexanderi • †Catopsalis calgariensis • trees Cedrela'' • †Cedrela trainii • †Cedrelospermum • †Cedrelospermum lineatum • †Cedrelospermum nervosum • †Cedrobaena – type locality for genus • †Cedrobaena putorius • †Cedrocherus • †Cedrocherus aceratus – type locality for species • †Cedrocherus ryani – type locality for species • †Cedromus • †Cedromus wardi • , or staff vine †Celastrus'' • †Celastrus culveri • †Celastrus ellipticus • †Celastrus inaequalis • †Celastrus winchesteri • †Celliforma • †Celliforma spirifer • Celtis • †Celtis aspera • †Celtis newberryi • †Celtis peracuminata • †Celtis phenacodorum • †Centetodon • †Centetodon bacchanalis • †Centetodon bembicophagus • †Centetodon chadronensis • †Centetodon hendryi • †Centetodon magnus • †Centetodon marginalis • †Centetodon neashami – type locality for species • †Centetodon patratus • †Centetodon pulcher • †Centrinus • †Centrinus diruptus – type locality for species • †Centrocercus • †Centrocercus urophasianus • †Cephalogale • †Ceratophyllum • †Ceratophyllum muricatum • †Ceratosuchus'' • †Ceratosuchus burdoshi • Cercidiphyllum • †Cercidiphyllum arcticum • †Cercidiphyllum articum • †Cercidiphyllum BB21 informal • †Cercidiphyllum BB34-52 informal • †Cercidiphyllum genetrix • †Cercidiphyllum tiny winged seeds informal • †Cercidiphyllum tiny wingedseeds informal • froghopper †Cercopis'' • †Cercopis astricta – type locality for species • †Cercopites – type locality for genus • †Cercopites calliscens – type locality for species • †Cercopites umbratilis – type locality for species • †Ceutholestes • †Ceutholestes dolosus – type locality for species • †Ceutholestes acerbus – type locality for species • †Chadrolagus • †Chadrolagus emryi • †Chaetoptelea • †Chaetoptelea microphylla • †Chaetoptelea pseudofulva – tentative report • †Chalicomomys • †Chalicomomys willwoodensis – type locality for species • †Champsosaurus'' • †Champsosaurus gigas • †Chaneya • †Chaneya tenuis'' • Chara • Charadrius • †Charadrius montanus • †Charadrius vociferus • Charina • †Charina prebottae • Cheilosia • †Cheilosia ampla – type locality for species • †Cheilosia scudderi • †Chelomophrynus – type locality for genus • †Chelomophrynus bayi – type locality for species • †Chilostigma – tentative report • †Chilostigma ostracoderma • †Chiromyoides • †Chiromyoides caesor – type locality for species • †Chiromyoides kesiwah – type locality for species • †Chiromyoides major – type locality for species • †Chiromyoides minor – type locality for species • †Chiromyoides potior • Chironomus • †Chironomus septus – type locality for species • †Chisternon'' • †Chisternon hebraicum – type locality for species • †Chisternon undatum – type locality for species • †Chlororhysis • †Chlororhysis incomptus – type locality for species • †Chlororhysis knightensis – type locality for species • †Choctawius – or unidentified comparable form • †Cholula • †Cholula triguttata – type locality for species • †Choragus • †Choragus fictilis – type locality for species • †Chordeiles • , or common nighthawk †Chordeiles minor'' • †Chriacus • †Chriacus badgleyi • †Chriacus baldwini • †Chriacus gallinae • †Chriacus katrinae • †Chriacus oconostotae • †Chriacus pelvidens • †Chumashius • †Cicadula • †Cicadula saxosa – type locality for species • †Cimolestes • †Cinnamomophyllum • †Cinnamomophyllum RR19 informal • , or cinnamon tree Cinnamomum'' • †Cinnamomum sezannense • †Cinnamomum spectabilis • Circus • †Circus cyaneus • †Cissites • †Cissites rocklandensis • Cissus • †Cissus haguei • †Cissus marginata • †Cissus marginatus • †Cixius – tentative report • †Cixius hesperidum – type locality for species • , or yellowwood Cladrastis'' • †Cladrastis GR579 informal • †Cladrastis GR580 informal • †Claenodon • †Claenodon montanensis • †Cnemidaria • †Cnemidaria magna • †Coccothraustes • †Coccothraustes vespertinus • , or moonseed Cocculus'' • †Cocculus flabella • †Coelidia • †Coelidia wyomingensis – type locality for species • Colaptes • †Colaptes auratus • †Colodon • †Colodon woodi • †Colpocherus • †Colpoclaenus • †Colpoclaenus keeferi – type locality for species • †Colpoclaenus procyonoides – or unidentified comparable form • Colymbus • †Colymbus nigricollis • †Compsemys • †Compsemys victa • †Conacodon • †Conacodon cophater – or unidentified comparable form • †Conacodon delphae • . Othniel Charles Marsh (1892). †Coniophis'' • †Coniophis carinatus – type locality for species • †Coniophis platycarinatus – type locality for species • †Copecion • †Copecion brachypternus • †Copecion davisi • †Copedelphys • †Copedelphys stevensoni • †Copelemur • †Copelemur australotutus – type locality for species • †Copelemur praetutus • †Copelemur tutus • †Copemys • †Copemys longidens • †Coriphagus • †Coriphagus encinensis – or unidentified comparable form • †Coriphagus montanus • †Corizus – tentative report • †Corizus guttatus – type locality for species • Cormocyon †Cormocyon • †Cormocyon haydeni • Cornus • †Cornus hyperborea • †Cornus nebrascensis • †Cornus newberryi • †Cornus wrightii • Corvus • †Corvus brachyrhynchos • †Corvus corax • †Corylites • †Corylites FW01 informal • †Corylus • †Corylus insignis • †Corylus macquarryi • Corymbites • †Corymbites velatus – type locality for species • . Heinrich Harder (1920). †Coryphodon'' • †Coryphodon armatus • †Coryphodon eocaenus • †Coryphodon lobatus • †Coryphodon proterus • †Coryphodon radians • †Cranea • †Cranea wyomingensis • Crataegus • †Credneria • †Credneria daturaefolia – tentative report • †Credneria pachyphylla • †Cristadjidaumo • †Cristadjidaumo skinneri – type locality for species • Crocodylus • †Crocodylus affinis'' – type locality for species • †Crocodylus ziphodon – type locality for species • †Cryptocephalus • †Cryptocephalus vetustus – type locality for species • Cryptorhynchus • †Cryptorhynchus annosus – type locality for species • Cryptotis • Culex • †Culex damnatorum – type locality for species • †Cupanieidites • †Cupanieidites inaequalis • †Cupanieidites inaequatis • †Cupidinimus • †Cupidinimus whitlocki • †Cycadopites • †Cycadopites follicularis • Cyclocarya • †Cyclurus • †Cyclurus fragosus • †Cylindrodon • †Cylindrodon natronensis – type locality for species • †Cylindrodon solarborus – type locality for species • †Cynarctoides'' • †Cynarctoides acridens • †Cynarctoides harlowi • †Cynarctoides luskensis – type locality for species • †Cyperacites • †Cyperacites angustior • †Cyperacites filiferus • †Cyperacites giganteus • †Cyriacotherium • †Cyriacotherium argyreum – type locality for species • †Cyriacotherium psamminum – type locality for species • †Cyrilavis • †Cyrilavis olsoni – type locality for species • †Cyrtomenus • †Cyrtomenus concinnus – type locality for species ==D==

• †Dalbergia • †Daphoenictis • †Daphoenodon'' • †Daphoenodon falkenbachi – type locality for species • †Daphoenodon niobrarensis • †Daphoenodon skinneri – type locality for species • †Daphoenodon superbus • †Daphoenus • †Daphoenus lambei • †Dartonius • †Dartonius jepseni • stingray Dasyatis'' • †Davidia • †Davidia antiqua • †Dawsonicyon – type locality for genus • †Dawsonicyon isami – type locality for species • †Dawsonomys • †Dawsonomys woodi • †Dawsonophis – type locality for genus • †Dawsonophis wyomingensis – type locality for species • †Debeya • †Decatoma • †Decatoma antiqua – type locality for species • †Delotrochanter • †Delotrochanter major – type locality for species • Dendragapus • , or dusky grouse †Dendragapus obscurus'' • †Dendropanax • †Dendropanax latens • †Dennstaedia • †Dennstaedia americana • †Dennstaedtia • †Dennstaedtia americana • †Dennstaedtiopsis • †Dennstaedtiopsis aerenchymata • †Desmatippus • †Desmatippus tyleri • †Desmatochoerus • †Desmatochoerus hatcheri • †Desmatochoerus megalodon • †Desmatoclaenus • †Desmatoclaenus mearae • †Desmatolagus • †Desmatolagus schizopetrus • †Desmatotherium • †Desmatotherium intermedius • †Desmocyon • †Desmocyon thomsoni • †Devallia – tentative report • †Devallia montana • †Diacocherus • †Diacocherus meizon – type locality for species • †Diacocherus minutus • †Diacodexis • †Diacodexis ilicis • †Diacodexis kelleyi • †Diacodexis kellyi • †Diacodexis metsiacus • †Diacodexis minutus • †Diacodexis primus • †Diacodexis secans • †Diacodexis woltonensis – type locality for species • †Diacodon • †Diacodon celatus • †Diaplegma • †Diaplegma obdormitum – type locality for species • †Diatryma – type locality for genus • †Diatryma gigantea – type locality for species • Diceratherium. Robert Bruce Horsfall (1913). †Diceratherium • †Diceratherium annectens • †Diceratherium armatum • †Diceratherium tridactylum • Dicotylophyllum • †Dicotylophyllum anomalum • †Dicotylophyllum mercerensis • Dicranomyia • †Dicranomyia primitiva • †Dicranomyia rhodolitha – type locality for species • Dicrostonyx • †Didelphodontine • †Didelphodus • †Didelphodus absarokae • †Didelphodus altidens • †Didymictis • †Didymictis altidens • †Didymictis leptomylus • †Didymictis protenus • †Didymictis proteus • †Didymictis vancleveae – or unidentified comparable form • †Dillerlemur • †Dillerlemur pagei • †Dillerlemur robinettei – type locality for species • †Dilophodon • †Dilophodon destitutus – type locality for species • †Dilophodon minusculus • . Robert Bruce Horsfall (1913). †Dinictis'' • †Dinictis felina • †Dinohyus • †Diospyros • †Diospyros brachysepala • †Diospyros haguei • †Diospyros lamarensis • †Dipassalus • †Dipassalus oryctes • †Diplobunops • †Diplobunops matthewi • †Diplocynodon • †Diplolophus • †Diplolophus insolens – type locality for species • preserved in the act of swallowing another fish †Diplomystus'' • †Diplomystus dentatus • †Dipoides • †Dipoides stirtoni • †Dipsalidictis • †Dipsalidictis aequidens • †Dipsalidictis krausei – type locality for species • †Dipsalidictis platypus – type locality for species • †Dipsalidictis transiens • †Dipsalodon • †Dipsalodon churchillorum • †Dipsalodon matthewi – type locality for species • tree Dipteronia'' • †Dipteronia GR551 informal • †Dipteronia insignis • Discus • †Dissacus • †Dissacus argenteus – type locality for species • †Dissacus longaevus • †Dissacus navajovius • †Dissacus praenuntius • †Distylium • †Distylium eocenica • †Dithelysia • †Dithelysia amorensis • fly Dolichopus'' • †Dombeya • †Dombeya novimundi • †Domnina • †Domnina gradata – or unidentified comparable form • †Domninoides • †Domninoides valentinensis – or unidentified comparable form • †Dorraletes • †Dorraletes diminutivus • †Douglassciurus • †Douglassciurus jeffersoni • †Drimys • Dryocoetes • †Dryocoetes carbonarius – type locality for species • †Dryocoetes impressus • †Dryomomys – type locality for genus • †Dryomomys dulcifer – type locality for species • †Dryomomys szalayi – type locality for species • , or wood fern Dryopteris'' • †Dryopteris lakesi • †Dryopteris longipetiolatum • †Dryopteris meeteetseana • †Dryopteris serrata • †Dryopteris weedii • †Dryopteris xantholithensis • †Dunnophis • †Dunnophis microechinis – type locality for species • †Dunnophis microechinus • †Dysagrion – type locality for genus • †Dysagrion fredericii – type locality for species • †Dysagrion lakesii – type locality for species • †Dysagrion packardii – type locality for species ==E==

• †Echmatemys'' • †Echmatemys haydeni • †Echmatemys lativertebralis • †Echmatemys megaulax • †Echmatemys rivalis – type locality for species • †Echmatemys septaria • †Echmatemys testudinea • †Echmatemys wyomingensis • †Eclytus • †Eclytus lutatus – type locality for species • †Ectocion'' • †Ectocion cedrus – type locality for species • †Ectocion collinus – type locality for species • †Ectocion major – or unidentified comparable form • †Ectocion mediotuber – type locality for species • †Ectocion osbornianus • †Ectocion parvus • †Ectocion superstes • †Ectoconus • †Ectoconus cavigellii – type locality for species • †Ectoconus ditrigonus • †Ectoganus • †Ectoganus bighornensis • †Ectoganus copei • †Ectoganus gliriformes • †Ectoganus gliriformis • †Ectoganus lobdelli • †Ectopistes • , or passenger pigeon †Ectopistes migratorius'' • †Ectopocynus • †Ectopocynus antiquus – type locality for species • †Ectopocynus intermedius – type locality for species • †Ectypodus • †Ectypodus aphronorus • †Ectypodus childei – or unidentified comparable form • †Ectypodus hazeni – type locality for species • †Ectypodus laytoni – type locality for species • †Ectypodus lovei • †Ectypodus musculus • †Ectypodus powelli – type locality for species • †Ectypodus simpsoni • †Ectypodus szalayi • †Ectypodus tardus • †Elaeodendron • †Elaeodendron polymorphum • †Ellipsodon • †Ellipsodon lemuroides – or unidentified comparable form • †Elphidotarsius • †Elphidotarsius florencae – or unidentified comparable form • †Elphidotarsius shotgunensis • †Elpidophorus • †Elpidophorus elegans • †Elpidophorus minor – or unidentified comparable form • †Elwynella – type locality for genus • †Elwynella oreas – type locality for species • †Enhydrocyon • †Enhydrocyon basilatus • †Enhydrocyon crassidens • †Enhydrocyon pahinsintewakpa • Enochrus • †Enochrus primaevus – type locality for species • . Charles R. Knight. †Entelodon'' • †Entelodon coarctatus – or unidentified comparable form • †Entomolestes – type locality for genus • †Entomolestes grangeri – type locality for species • †Entomolestes westgatei – type locality for species • †Entomophontes – type locality for genus • †Entomophontes hutchisoni – type locality for species • †Entomophontes incrustatus – type locality for species • †Entoptychus • . Charles R. Knight (1890s). †Eobasileus'' • †Eobasileus cornutus • †Eobucco • †Eobucco brodkorbi • †Eocalopteryx • †Eocalopteryx atavina – type locality for species • †Eoceornis – type locality for genus • †Eoceornis ardetta – type locality for species • †Eoconodon • †Eoconodon copanus • †Eocrex – type locality for genus • †Eocrex primus – type locality for species • †Eodiploglossus – type locality for genus • †Eodiploglossus borealis – type locality for species • †Eoerianthus • †Eoerianthus multispinosa • †Eoformica • †Eoformica pinguis – type locality for species • †Eofringillirostrum – type locality for genus • †Eofringillirostrum boudreauxi – type locality for species • †Eoglyptosaurus • †Eoglyptosaurus donohoei – type locality for species • Eohiodon • . Heinrich Harder (1920). †Eohippus'' • †Eohippus cristatus • †Eoictops – type locality for genus • †Eoictops novaceki – type locality for species • †Eoliarus – tentative report • †Eoliarus lutensis – type locality for species • †Eomoropus • †Eomoropus amarorum • †Eomoropus anarsius • †Eopodagrion – type locality for genus • †Eopodagrion abortivum – type locality for species • †Eopodagrion scudderi – type locality for species • †Eorhinophrynus • †Eorhinophrynus septentrionalis – type locality for species • †Eoryctes – type locality for genus • †Eoryctes melanus – type locality for species • †Eostangeria • †Eostangeria pseudopteris • †Eostrix • †Eostrix martinellii – type locality for species • †Eotitanops'' • †Eotitanops borealis • †Eotylopus • †Eotylopus reedi – type locality for species • †Eozygodactylus – type locality for genus • †Eozygodactylus americanus – type locality for species • †Epicaerus • †Epicaerus dilapsus – type locality for species • †Epicaerus effossus – type locality for species • †Epicaerus exanimis – type locality for species • †Epicaerus fodinarum • †Epicaerus saxatilis – type locality for species • †Epicaerus subterraneus • †Epicaerus terrosus – type locality for species • †Epihippus'' • †Epihippus gracilis • †Epitriplopus • †Epitriplopus uintensis • †Epoicotherium • †Epoicotherium unicum • †Equisetum • †Equisetum canaliculatum • †Equisetum deciduum • †Equisetum FW21 informal • †Equisetum haguei • Equus • †Equus conversidens • Eremophila • †Eremophila alpestris • inflorescences, Brazil Erythrina'' • †Erythrina roanensis – type locality for species • Esox • †Esox kronneri – type locality for species • †Esthonyx • †Esthonyx acutidens • †Esthonyx bisulcatus • †Esthonyx gunnelli • †Esthonyx spatularius • †Eucastor • †Eucommia • †Eucommia serrata • †Eudaemonema • †Eudaemonema cuspidata • Eugenia'' • †Eugenia americana • †Eugnamptus • †Eugnamptus decemsatus – type locality for species • †Eugnamptus grandaevus • †Euhapsis • †Euhapsis ellicottae • †Eumys • †Eumys elegans • †Euparius • †Euparius elusus – type locality for species • †Euparius repertus – type locality for species • Euphagus • †Euphagus cyanocephalus • †Euphagus magnirostris • †Euproteaciphyllum • †Euproteaciphyllum minutum • †Eusmilus'' • †Eusmilus sicarius • Eutamias • †Eutypomys • †Eutypomys parvus • †Exostinus • †Exostinus lancensis – or unidentified comparable form ==F==

• Fagus • †Fagus antipofii • †Fagus undulata • Falco • †Falco columbarius • †Falco falconella – type locality for species • , or prairie falcon †Falco mexicanus'' • †Falco rusticolus • †Falco sparverius • †Ficarasites – type locality for genus • †Ficarasites stigmaticum – type locality for species • Ficus • †Ficus affinis • †Ficus artocarpoides • †Ficus asiminaefolia • †Ficus deformata • †Ficus densifolia • †Ficus haguei • †Ficus planicostata • †Ficus shastensis – tentative report • †Ficus subtruncata • †Ficus tiliaefolia – tentative report • †Ficus ungeri • †Firmianites – type locality for genus • †Firmianites aterrimus – type locality for species • †Florentiamys • †Florentiamys kinseyi – type locality for species • †Florentiamys loomisi – type locality for species • †Fluvioviridavis'' – type locality for genus • †Fluvioviridavis platyrhamphus – type locality for species • †Foekenia • †Foekenia catenulata • †Fortuna • †Fortuna marsilioides – or unidentified comparable form • †Franimys • †Franimys ambos • †Franimys amherstensis – type locality for species • †Franimys buccatus • †Fraxinoipollenis • †Fraxinoipollenis variabilis • †Fraxinoipollenites • †Fraxinoipollenites pachyexinous • †Fraxinoipollenites variabilis • †Fraxinopollenites • †Fraxinopollenites variabilis • , or ash tree, with insets further detailing its anatomy †Fraxinus'' • †Fraxinus eocenica • †Fraxinus eocinica • †Fraxinus wrightii • †Fulgora • †Fulgora granulosa – type locality for species • †Fulgora populata – type locality for species ==G==

• †Gagadon • †Gagadon minimonstrum • †Galbreathia • †Galbreathia novellus • †Galecyon • †Galecyon mordax • Galerita • †Galerita marshii – type locality for species • †Gallinuloides'' – type locality for genus • †Gallinuloides wyomingensis – type locality for species • Gastrocopta • Gastrodonta • †Gaultia – type locality for genus • †Gaultia silvaticus – type locality for species • †Gazinius • †Gazinius amplus • †Gazinius bowni – type locality for species • †Gazinocyon • †Gazinocyon vulpeculus • †Gelastops • †Gelastops joni – type locality for species • †Gelastops parcus • †Geranoides – type locality for genus • †Geranoides jepseni – type locality for species • †Geringophis • †Geringophis depressus • Gerrhonotus – or unidentified comparable form • Ginkgo • †Ginkgo adiantoides'' • †Gleditsia – or unidentified related form • †Gleditsia RR29 informal • †Gleicheniidites • †Glypta • †Glypta transversalis – type locality for species • †Glyptosaurus – type locality for genus • †Glyptosaurus agmodon – type locality for species • †Glyptosaurus obtusidens – type locality for species • †Glyptosaurus rhodinos – type locality for species • †Glyptosaurus sphenodon – type locality for species • †Glyptosaurus sylvestris – type locality for species • Glyptostrobus • †Glyptostrobus europaeus'' • †Glyptostrobus nordenskioldi • †Goinophis – tentative report • †Gomphochelys – type locality for genus • †Gomphochelys nanus – type locality for species • †Goniacodon • †Goniacodon levisanus – type locality for species • †Goniodontomys • †Goniodontomys disjunctus • Gopherus • †Gopherus laticuneus • †Gracilocyon • †Gracilocyon rosei • †Gracilocyon winkleri • †Grangerella • †Gregorymys • †Gregorymys formosus • †Gregorymys riggsi – type locality for species • †Grewiopsis – tentative report • †Grewiopsis aldersoni • †Griphomys • Grus • †Grus canadensis • †Grus marshi – type locality for species • Gulo • , or wolverine †Gulo gulo'' • †Gymnetron • †Gymnetron lecontei – type locality for species • †Gymnocladus • †Gymnocladus hesperia • Gyraulus – or unidentified comparable form ==H==

• †Habrosaurus • †Habrosaurus dilatus • †Hadrianus • †Hadrianus allabiatus – type locality for species • †Hadrianus quadratus – type locality for species • †Hammapteryx – type locality for genus • †Hammapteryx reticulata – type locality for species • †Hapalodectes'' • †Hapalodectes anthracinus • †Hapalodectes leptognathus • †Hapalorestes • †Hapalorestes lovei – type locality for species • †Haplaletes • †Haplaletes disceptatrix • †Haplaletes pelicatus – type locality for species • †Haploconus • †Haplodontosaurus • †Haplodontosaurus excedens • †Haplolambda • †Haplolambda quinni • †Haplomylus • †Haplomylus bozemanensis – type locality for species • †Haplomylus palustris • †Haplomylus scottianus – type locality for species • †Haplomylus simpsoni • †Haplomylus speirianus • †Haplomylus zalmouti • †Harpagolestes'' • †Harpagolestes macrocephalus – type locality for species • †Harpalodon • †Harpalodon sylvestris – or unidentified comparable form • †Harrymys • †Harrymys irvini • †Harrymys woodi • †Helaletes – type locality for genus • †Helaletes nanus – type locality for species • †Heliscomys • †Heliscomys hatcheri • †Heliscomys mcgrewi • †Heliscomys ostranderi • †Heliscomys vetus – or unidentified comparable form • †Helix • †Helix evanstonensis • †Helix sinclairi • †Helodermoides'' • †Helodermoides tuberculatus • †Helohyus • †Helohyus lentus • †Helohyus milleri – type locality for species • †Helohyus plicodon – type locality for species • †Hemiacodon • †Hemiacodon casamissus – type locality for species • †Hemiacodon engardae – type locality for species • †Hemiacodon gracilis • relative Hemiauchenia †Hemiauchenia • †Hemipsalodon • †Hemipsalodon grandis • Hemitelia • †Hemitelia magna • †Hemithlaeus • †Hemithlaeus harbourae • †Hemithlaeus josephi • †Hendryomeryx • †Hendryomeryx wilsoni • †Heptacodon • †Heptodon • †Heptodon calciculus • †Heptodon posticus • †Herpetotherium'' • †Herpetotherium innominatum – type locality for species • †Herpetotherium knighti • †Herpetotherium youngi – or unidentified comparable form • †Hesperocyon • †Hesperocyon gregarius • †Hesperopetes • †Hesperopetes thoringtoni – type locality for species • †Hesperosorex • †Hesperosorex lovei – type locality for species • †Heteraletes • †Heteraletes leotanus • †Hexacodus • †Hexacodus pelodes • †Hexacodus uintensis • †Hicoria • †Hicoria antiqua • †Hicoria crescentia • †Hicoria culveri • Hirundo – or unidentified comparable form • †Hirundo pyrrhonota • †Holospira • †Homacodon • †Homacodon vagans – type locality for species • †Homalota • †Homalota recisa – type locality for species • †Homogalax • †Homogalax protapirinus • †Honrovits – type locality for genus • †Honrovits tsuwape – type locality for species • . Robert Bruce Horsfall (1913). †Hoplophoneus'' • †Hoplophoneus mentalis • †Hoplophoneus primaevus • †Hovenia • †Hovenia oregonensis – or unidentified comparable form • †Huerfanodon • †Huerfanodon polecatensis – type locality for species • †Hummelichelys • †Hummelichelys annae – type locality for species • †Hummelichelys ellipticus • †Hummelichelys grangeri – type locality for species • †Hummelichelys guttatus – type locality for species • †Hutchemys • †Hutchemys rememdium • †Hyaenodon'' • †Hyaenodon crucians • †Hyaenodon horridus • †Hyaenodon megaloides • †Hyaenodon montanus • †Hyaenodon mustelinus • †Hyaenodon venturae • †Hyaenodon vetus • Hydrangea • †Hydrangea antica • †Hydrangea GR537 informal • Hydrobia – report made of unidentified related form or using admittedly obsolete nomenclature • water scavenger beetle Hydrobius'' • †Hydrobius confixus – type locality for species • †Hydrobius decineratus – type locality for species • †Hydrochus • †Hydrochus relictus – type locality for species • †Hydromystria • †Hydromystria expansa • †Hylobius • †Hylobius packardii – type locality for species • †Hylobius provectus – type locality for species • †Hyopsodus'' • †Hyopsodus aemulor • †Hyopsodus latidens • †Hyopsodus lepidus – type locality for species • †Hyopsodus loomisi • †Hyopsodus lysitensis • †Hyopsodus mentalis • †Hyopsodus minor • †Hyopsodus minusculus – type locality for species • †Hyopsodus miticulus • †Hyopsodus paulus – type locality for species • †Hyopsodus pauxillus – type locality for species • †Hyopsodus powellianus • †Hyopsodus simplex • †Hyopsodus tonksi – type locality for species • †Hyopsodus uintensis • †Hyopsodus walcottianus • †Hyopsodus wortmani • †Hypertragulus • †Hypertragulus calcaratus • †Hypisodus • †Hypisodus alacer • †Hypisodus minimus • . Heinrich Harder (1920). †Hypohippus'' • †Hypohippus affinis • †Hypolagus • †Hypolagus parviplicatus – or unidentified comparable form • †Hyporhina • †Hyporhina tertia • †Hypsiops • †Hypsiops breviceps • †Hyrachyus • †Hyrachyus eximius • †Hyrachyus modestus – type locality for species • . Charles R. Knight (1896). †Hyracodon'' • †Hyracodon nebraskensis • †Hyracodon petersoni • †Hyracodon priscidens • †Hyracotherium • †Hyracotherium vasacciense ==I==

• †Icaronycteris'' – type locality for genus • †Icaronycteris index – type locality for species • †Ignacius • †Ignacius clarkforkensis – type locality for species • †Ignacius fremontensis • †Ignacius frugivorus • †Ignacius graybullianus • †Iguanavus – type locality for genus • †Iguanavus exilis – type locality for species • †Indusia • †Indusia calculosa – type locality for species • †Insulapollenites • †Insulapollenites leboensis • †Insulapollenites rugulatus • †Intyrictis • †Intyrictis vanvaleni • †Iridodon – type locality for genus • †Iridodon datzae – type locality for species • †Ischyromys'' • †Ischyromys typus • †Ischyromys veterior • †Isectolophus • †Isectolophus latidens • †Isectolophus radinskyi – type locality for species • †Isoetites • †Isoetites horridus • †Iulus • †Iulus telluster – type locality for species ==J==

• †Jepsenella • †Jepsenella praepropera • †Jepsibaena • †Jepsibaena minor – type locality for species • †Joffrea • †Joffrea BB20 informal • †Joffrea FW50 informal • †Judithemys • †Judithemys backmani – or unidentified comparable form • †Juglandicarya • †Juglandiphyllites • †Juglandiphyllites glabra • Juglans • †Juglans crescentia • †Juglans laurifolia • †Juglans rugosa • †Juglans schimperi • †Juncitarsus'' – type locality for genus • †Juncitarsus gracillimus – type locality for species • Junco – or unidentified comparable form • †Junco hyemalis • †Junglandaceae ==K==

• †Kalmia • †Kalmia elliptica • †Kalobatippus • †Kalobatippus agatensis • †Kalobatippus avus • †Knightia'' • †Knightia eocaena • †Knightomys • †Knightomys cremneus • †Knightomys cuspidatus • †Knightomys depressus • †Knightomys huerfanensis • †Knightomys minor • †Knightomys senior • Koelreuteria • †Koelreuteria viridifluminis • †Koniaryctes • †Koniaryctes paulus – type locality for species • †Kydia – or unidentified related form • †Kydia FW61 informal ==L==

• †Labidolemur • †Labidolemur kayi • †Labidolemur major – type locality for species • †Labidolemur serus • †Labidolemur soricoides • Laccobius • †Laccobius elongatus – type locality for species • †Laevigatosporites • , or ptarmigan †Lagopus'' • †Lagopus leucurus – or unidentified comparable form • †Lambdotherium • †Lambdotherium popoagicum • †Lambertocyon • †Lambertocyon eximius • †Lambertocyon gingerichi – type locality for species • Lanius • †Lanius ludovicianus • Larus – or unidentified comparable form • †Lastrea • †Lastrea goldiana • Lathrobium • †Lathrobium abscessum – type locality for species • †Laurinoxylon • †Laurinoxylon pulchellum • †Laurophyllum • †Laurophyllum caudatum • †Laurophyllum perseanum • , or laurel trees Laurus'' • †Laurus californica • †Laurus grandis • †Laurus montana • †Laurus perdita • †Laurus primigenia – tentative report • †Laurus princeps • †Laurus socialis • †Leguminosites • †Leguminosites coloradensis • †Leguminosites lamarensis • †Leguminosites lesquereuxiana • †Leguminosites regularis – type locality for species • Leiocephalus • †Leipsanolestes • †Leipsanolestes siegfriedti • , or gar Lepisosteus'' • †Lepisosteus glaber – or unidentified comparable form • †Lepisosteus occidentalis • †Leptacodon • †Leptacodon donkroni • †Leptacodon munusculum • †Leptacodon packi – type locality for species • †Leptacodon tener • †Leptarctus – or unidentified comparable form • †Leptauchenia'' • †Leptauchenia decora • †Leptauchenia major • †Leptictis • †Leptictis dakotensis • †Leptocyon • †Leptocyon gregorii • †Leptolambda • †Leptolambda schmidti • †Leptomeryx'' • †Leptomeryx esulcatus • †Leptomeryx evansi • †Leptomeryx mammifer • †Leptomeryx semicinctus • †Leptomeryx speciosus • †Leptomeryx yoderi – type locality for species • †Leptoreodon • †Leptotomus • †Leptotomus guildayi • †Leptotomus parvus – type locality for species • †Leptotragulus • †Leptotragulus clarki – or unidentified comparable form • †Leptotragulus medius • †Leptotragulus ultimus • Lepus • Lepyrus – tentative report • †Lepyrus evictus – type locality for species • †Lestophis • †Lestophis anceps – type locality for species • †Lestophis crassus – type locality for species • †Leucosticte • †Leucosticte arctoa • †Limaconyssus – type locality for genus • †Limaconyssus habrus – type locality for species • †Limalophus • †Limalophus compositus • †Limalophus contractus – type locality for species • †Limnocyon'' • †Limnocyon cuspidens – type locality for species • †Limnocyon medius • †Limnocyon potens – type locality for species • †Limnocyon velox – type locality for species • †Limnocyon verus – type locality for species • †Limnoecus • †Limnofregata'' – type locality for genus • †Limnofregata azygosternon – type locality for species • †Limnofregata hutchisoni – type locality for species • Lindera • †Lindera obtusata • †Lindera varifolia – type locality for species • †Lisserpeton • †Lisserpeton bairdi • †Listronotus • †Listronotus muratus – type locality for species • †Litaletes • †Litaletes disjunctus • †Litaletes ondolinde • †Lithexorista – type locality for genus • †Lithexorista scudderi – type locality for species • †Lithohypoderma • larva †Lithohypoderma ascarides'' - type locality for species • †Lithophis – type locality for genus • †Lithophis sargenti – type locality for species • †Lithophysa – type locality for genus • †Lithophysa tumulta – type locality for species • †Lithopsis – type locality for genus • †Lithopsis elongata – type locality for species • †Lithopsis fimbriata – type locality for species • †Lithornis'' • †Lithornis plebius – type locality for species • †Lithornis promiscuus – type locality for species • †Lithotorus – type locality for genus • †Lithotorus cressoni – type locality for species • †Litocherus • †Litocherus lacunatus – type locality for species • †Litocherus notissimus • †Litocherus zygeus – type locality for species • †Litolagus • †Litolagus molidens • †Litolestes • †Litolestes ignotus – type locality for species • †Litomylus • †Litomylus dissentaneus – type locality for species • †Litomylus ishami – type locality for species • †Litomylus scaphicus – type locality for species • †Litoyoderimys • †Litoyoderimys auogoleus • †Lophiotherium • †Lophiotherium vasacciensis – type locality for species • †Lophiparamys • †Lophiparamys debequensis • †Lophiparamys murinus • †Lophiparamys woodi • †Lophocion • †Lophocion grangeri – type locality for species • †Loveina – type locality for genus • †Loveina minuta • †Loveina sheai • †Loveina wapitiensis • †Loveina zephyri – type locality for species • †Loxolophus • †Loxolophus criswelli • †Loxolophus faulkneri – type locality for species • †Loxolophus hyattianus – or unidentified comparable form • †Loxolophus priscus • †Lucashyus – type locality for genus • †Lucashyus coombsae – type locality for species • †Lyctocoris – tentative report • †Lyctocoris terreus – type locality for species • Lygodium • †Lygodium coloradense • †Lygodium kaulfussi • Lynx • , or Eurasian lynx †Lynx lynx'' – tentative report • †Lystra – tentative report • †Lystra leei – type locality for species • †Lystra richardsoni – type locality for species ==M==

• †Maceopolipollenites • †Maceopolipollenites amplus • †Maceopolipollenites leboensis • †Maceopolipollenites rotundus • †Maceopolipollenites tenuipolus • †Maceopolipollenites triorbicularis • †Macginitiea • †Macginitiea gracilis • †Macginitiea wyomingensis • †Machaeroides • †Machaeroides eothen • †Machaeroides simpsoni – type locality for species • †Machaerosaurus • †Machaerosaurus torrejonensis • Macrocranion • †Macrocranion junnei – type locality for species • †Macrocranion nitens • †Macrocranion robinsoni • †Macrotarsius • †Macrotarsius siegerti – type locality for species • flower Magnolia'' • †Magnolia borealis • †Magnolia californica • †Magnolia culveri • †Magnolia magnifica • †Magnolia magnifolia • †Magnolia microphylla • †Magnolia pollardi • †Magnolia spectabilis • †Maiorana • †Maiorana ferrisensis – type locality for species • †Maiorana noctiluca • †Malapoenna • †Malapoenna cuneata • †Malapoenna lamarensis • †Malaquiferus • †Malaquiferus tourteloti – type locality for species • †Malfelis – type locality for genus • †Malfelis badwaterensis – type locality for species • †Mammacyon • †Mammacyon ferocior – type locality for species • †Mammuthus • , or Columbian mammoths. The extent of the fur depicted is hypothetical. Charles R. Knight (1909). †Mammuthus columbi'' • Marmota • †Marsholestes • †Marsholestes dasypelix – type locality for species • †Mattimys • †Mattimys kalicola • †Megacerops • †Megacerops osborni – type locality for species • †Megadelphus • †Megadelphus lundeliusi • †Megalagus • †Megalagus brachyodon • †Megalagus primitivus • †Megalagus turgidus • †Megalesthonyx • †Megalesthonyx hopsoni • †Megalictis'' • †Megalictis ferox • †Megalictis petersoni • †Melanosaurus – type locality for genus • †Melanosaurus maximus – type locality for species • †Melastomites • †Melastomites montanensis • †Meliakrouniomys • †Meliakrouniomys skinneri • †Meliosma • †Meliosma flexuosa • †Meliosma longifolia • . Robert Bruce Horsfall (1913). †Meniscotherium'' • †Meniscotherium chamense • †Meniscotherium priscum • †Meniscotherium tapiacetum • †Meniscotherium tapiacitum • †Menisperimites • †Menisperimites parvareolatus • †Menispermites • †Menispermites limacioides – type locality for species • †Menispermites parvareolatus • †Menoceras'' • †Menoceras arikarense • †Menoceras barbouri • †Menops • †Menops heloceras • †Menops marshi – or unidentified comparable form • †Mentoclaenodon • †Mentoclaenodon acrogenius – type locality for species • Mergus • †Mergus merganser • †Merychippus'' • †Merychippus coloradense • †Merychippus insignis – or unidentified comparable form • †Merychippus primus • †Merychyus • †Merychyus arenarum • †Merychyus crabilli • †Merychyus elegans – or unidentified comparable form • †Merychyus minimus • †Merycobunodon – tentative report • †Merycobunodon walshi – type locality for species • †Merycochoerus • †Merycochoerus chelydra • †Merycochoerus magnus • †Merycochoerus matthewi • †Merycodus'' • †Merycodus sabulonis – or unidentified comparable form • †Merycodus warreni – or unidentified comparable form • †Merycoides • †Merycoides longiceps • †Merycoides pariogonus • †Merycoidodon • †Merycoidodon culbertsoni – type locality for species • †Merycoidodon major • †Merycoidodon presidioensis – or unidentified comparable form • †Mesatirhinus • †Mesatirhinus megarhinus • †Mesocyon – report made of unidentified related form or using admittedly obsolete nomenclature • †Mesocyon temnodon • †Mesodma • †Mesodma ambigua – type locality for species • †Mesodma formosa • †Mesodma garfieldensis – or unidentified comparable form • †Mesodma hensleighi • †Mesodma pygmaea • . Heinrich Harder (c. 1920). †Mesohippus'' • †Mesohippus bairdi • †Mesohippus westoni – or unidentified comparable form • †Mesomeryx – or unidentified comparable form • †Mesomeryx grangeri • †Mesonyx • †Mesonyx obtusidens – type locality for species • †Mesoreodon • †Mesoreodon chelonyx • †Mesoreodon minor – type locality for species • †Mesoscalops • †Mesoscalops scopelotemos • †Metacheiromys'' • †Metacheiromys dasypus – type locality for species • †Metacheiromys marshi – type locality for species • †Metadjidaumo • †Metadjidaumo hendryi – type locality for species • †Metamynodon • †Metamynodon planifrons – or unidentified comparable form • †Metanoiamys • †Metanoiamys paradoxus • †Metarhinus • Metasequoia • †Metasequoia occidentalis • †Metatomarctus • †Metatomarctus canavus • †Miacis'' • †Miacis deutschi • †Miacis exiguus • †Miacis latidens • †Miacis medius • †Miacis parvivorus – type locality for species • †Miacis petilus • †Miacis vorax • †Michenia • Micrasema – tentative report • †Micrasema tessellatum – type locality for species • †Microclaenodon • †Microclaenodon assurgens • †Microcosmodon • †Microcosmodon conus – type locality for species • †Microcosmodon rosei – type locality for species • †Micromomys • †Micromomys antelucanus • †Micromomys silvercouleei – type locality for species • †Microparamys • †Microparamys cheradius • †Microparamys dubius • †Microparamys hunterae • †Microparamys minutus • land snail Microphysula'' – or unidentified comparable form • †Micropternodus • †Micropternodus borealis • †Microsus • †Microsus cuspidatus – type locality for species • †Microsyops • †Microsyops angustidens – type locality for species • †Microsyops annectens • †Microsyops cardiorestes • †Microsyops elegans – type locality for species • †Microsyops knightensis • †Microsyops latidens • †Microsyops scottianus • Microtus • , or meadow vole †Microtus pennsylvanicus'' • Mictomys • †Mictomys vetus • †Mimatuta • †Mimatuta makpialutae • †Mimatuta minuial – type locality for species • †Mimetodon • †Mimetodon churchilli – type locality for species • †Mimetodon silberlingi • †Mimoperadectes • †Mimoperadectes houdei – type locality for species • †Mimoperadectes labrus – type locality for species • †Mimosites • †Mimosites coloradensis • †Mimotricentes • †Mimotricentes fremontensis – type locality for species • †Miniochoerus'' • †Miniochoerus affinis – type locality for species • †Miniochoerus chadronensis – type locality for species • †Miniochoerus forsythae • †Miniochoerus gracilis • †Minippus • †Minippus index • †Mioclaenus • †Mioclaenus opisthacus – or unidentified comparable form • †Mioclaenus turgidus • †Miocyon • †Miocyon major – or unidentified comparable form • †Mioheteromys • †Mioheteromys amplissimus • †Miohippus • †Miohippus obliquidens • †Miolabis • †Miolabis fissidens • †Miomustela • †Mioplosus'' • †Miospermophilus • †Miospermophilus wyomingensis • †Miotapirus • †Miotapirus harrisonensis – type locality for species • †Miotylopus • †Miotylopus gibbi • †Miotylopus leonardi • †Miotylopus taylori – type locality for species • , or American cheetah †Miracinonyx'' • †Miracinonyx studeri • †Mithrandir • †Mithrandir gillianus • †Mitostylus • †Mitostylus seculorum – type locality for species • †Mixodectes • †Mixodectes malaris • Mnemosyne • †Mnemosyne terrentula – type locality for species • †Mojavemys • †Mojavemys magnumarcus • †Monosaulax • †Monosaulax curtus – or unidentified comparable form • †Moropus • †Moropus hollandi • Morus • †Morus montanensis • †Musophyllum • †Musophyllum complicatum • Mustela • †Mustela americana • †Mustela nigripes • Mycetobia – tentative report • †Mycetobia terricola – type locality for species • †Mylanodon – type locality for genus • †Mylanodon rosei – type locality for species • , or firetree Myrica'' • †Myrica lamarensis • †Myrica scottii • †Myrica wardii • †Myrmecoboides • †Myrmecoboides montanensis • Myrmica • †Myrtophyllum • †Myrtophyllum torreyi • †Mysops • †Mysops fraternus • †Mysops minimus – type locality for species • †Mysops parvus – type locality for species • †Mytonolagus • †Mytonolagus petersoni • †Mytonolagus wyomingensis – type locality for species • †Mytonomys • †Mytonomys coloradensis • †Mytonomys wortmani ==N==

• †Namatomys • †Namatomys erythrus – type locality for species • †Namatomys lloydi • †Nannodectes • †Nannodectes gazini – type locality for species • †Nannodectes gidleyi • †Nannodectes intermedius – type locality for species • †Nannodectes simpsoni – type locality for species • †Nanodelphys • †Nanodelphys hunti • †Nanomomys • †Nanomomys thermophilus • †Nanotragulus • †Nanotragulus loomisi – type locality for species • †Nanotragulus ordinatus • †Naocephalus – type locality for genus • †Naocephalus porrectus – type locality for species • †Navajovius • †Navajovius kohlhaasae • †Neanis • †Neanis schucherti • †Necrocydnus • †Necrocydnus gosiutensis – type locality for species • †Necygonus – type locality for genus • †Necygonus rotundatus – type locality for species • †Nelumbago • †Nelumbago montanum • lotus †Nelumbo'' • †Neocathartes • †Neocathartes grallator • †Neodiacodexis • †Neodiacodexis emryi • †Neoliotomus • †Neoliotomus conventus • †Neoliotomus ultimus • Neophrontops'' • †Neophrontops americana • †Neophrontops americanus • †Neoplagiaulax • †Neoplagiaulax grangeri – tentative report • †Neoplagiaulax hunteri • †Neoplagiaulax jepi – type locality for species • †Neoplagiaulax mckennai – type locality for species • †Neoplagiaulax nelsoni • †Neothanes • †Neothanes testeus – type locality for species • Neotoma • †Neovulpavus • †Neovulpavus washakius • †Nexuotapirus • †Nexuotapirus marslandensis • †Niglarodon • †Niptomomys • †Niptomomys doreenae • †Niptomomys favorum – type locality for species • †Niptomomys thelmae • †Nonomys • †Nonomys simplicidens • †Nordenskioldia • †Nordenskioldia borealis • †Nosodendron • †Nosodendron tritavum – type locality for species • †Notharctus • †Notharctus robinsoni – type locality for species • †Notharctus robustior • †Notharctus tenebrosus'' – type locality for species • †Notharctus venticolus • †Notogoneus • †Notomorpha – type locality for genus • †Notomorpha garmanii – type locality for species • †Notomorpha gravis – type locality for species • †Notomorpha testudinea – type locality for species • †Notoparamys – tentative report • †Notoparamys blochi – type locality for species • †Nototamias – or unidentified comparable form • †Nucifraga • †Nucifraga columbiana • Numenius • †Numenius americanus • , or Eskimo curlew †Numenius borealis'' • †Nyctea • †Nyctea scandiaca • †Nyctitherium • †Nyctitherium christopheri • †Nyctitherium gunnelli – type locality for species • †Nyctitherium serotinum – type locality for species • †Nyctitherium velox • †Nyssa • †Nyssa alata • †Nyssa borealis ==O==

• Ochotona • , or American pika †Ochotona princeps'' • Ocotea • †Ocotea coloradensis • †Ocotea FW03 informal • †Odaxosaurus • †Odaxosaurus jepseni – or unidentified comparable form • †Odaxosaurus piger • †Ogmophis • †Ogmophis microcompactus – or unidentified comparable form • †Ogmophis voorhiesi • †Oligodontosaurus – type locality for genus • †Oligodontosaurus wyomingensis – type locality for species • †Oligoryctes • †Oligoryctes altitalonidus • †Oligoryctes cameronensis • †Oligoscalops – tentative report • †Oligospermophilus • †Oligotheriomys • †Oligotheriomys senrudi • †Oliveremys • †Oliveremys uintaensis – type locality for species • †Omalodiscus • †Omomys • †Omomys carteri • †Omomys lloydi • Ondatra • †Ondatra meadensis • †Onoclea • †Onoclea hesperia • †Onychonycteris'' – type locality for genus • †Onychonycteris finneyi – type locality for species • †Oodectes • †Oodectes herpestoides – type locality for species • †Oodectes jepseni • Ophryastes • †Ophryastes compactus – type locality for species • †Opisthotriton • †Opisthotriton kayi • , or mountain goat Oreamnos'' • †Oreoconus • †Oreodontoides • †Oreodontoides oregonensis • Oreohelix • †Oreohelix megarche • †Oreolagus • †Oreolagus colteri • †Oreolagus nebrascensis • †Oreopanax • †Oreopanax elongatum • †Ormiscus • †Ormiscus partitus – type locality for species • †Orohippus'' • †Orohippus major – type locality for species • †Orohippus proteros • †Orohippus pumilus – type locality for species • †Orohippus sylvaticus • †Orthogenysuchus – type locality for genus • †Orthogenysuchus olseni – type locality for species • †Osbornodon • †Osbornodon brachypus – type locality for species • †Osmanthus • †Osmanthus praemissa • ferns †Osmunda'' • †Osmunda affinis • †Osmundacidites • †Otarocyon • †Otarocyon cooki • †Otiorhynchites • †Otiorhynchites fossilis – type locality for species • †Otiorhynchites tysoni • †Otiorhynchus • †Otiorhynchus dubius – type locality for species • †Otiorhynchus perditus – type locality for species • †Ototriton – type locality for genus • †Ototriton solidus – type locality for species • †Ourayia • †Ourayia hopsoni • †Ourayia uintensis • Ovis • , or bighorn sheep †Ovis canadensis'' • †Oxyacodon • †Oxyacodon agapetillus • †Oxyacodon apiculatus • †Oxyacodon priscilla • †Oxyaena • †Oxyaena forcipata • †Oxyaena gulo • †Oxyaena intermedia • †Oxyaena lupina • †Oxyclaenus • †Oxyclaenus cuspidatus • . Robert Bruce Horsfall (1913). †Oxydactylus'' • †Oxydactylus longipes – or unidentified comparable form • †Oxydactylus lulli – type locality for species • †Oxydactylus wyomingensis • †Oxyprimus • †Oxyprimus galadrielae – type locality for species • †Oxyprimus putorius ==P==

• †Pachyaena'' • †Pachyaena gigantea • †Pachyaena gracilis • †Pachyaena ossifraga • Pachycondyla • †Pachycondyla labandeirai – type locality for species • †Pachylobius • †Pachylobius compressus • †Palaeanodon • †Palaeanodon ignavus • †Palaeanodon Ignavus • †Palaeanodon nievelti • †Palaeanodon parvulus – tentative report • †Palaearctonyx • †Palaearctonyx meadi – type locality for species • †Palaechthon • †Palaechthon alticuspis – or unidentified comparable form • †Palaechthon woodi • †Palaeictops • †Palaeictops bicuspis • †Palaeictops bridgeri • †Palaeictops multicuspis • †Palaeocarpinus • †Palaeocarpinus aspinosa • †Palaeocarya • †Palaeocarya clarnensis • †Palaeogale • †Palaeogale sanguinarius • †Palaeogale sectoria • relative Palaeolagus †Palaeolagus • †Palaeolagus burkei • †Palaeolagus haydeni • †Palaeolagus hypsodus – type locality for species • †Palaeolagus intermedius • †Palaeolagus philoi • †Palaeolagus primus – type locality for species • †Palaeolagus temnodon • †Palaeonictis • †Palaeonictis occidentalis • †Palaeonictis peloria – type locality for species • †Palaeonictis wingi – type locality for species • †Palaeophasianus – type locality for genus • †Palaeophasianus meleagroides – type locality for species • †Palaeorallus – type locality for genus • †Palaeorallus troxelli – type locality for species • †Palaeoryctes • †Palaeoryctes cruoris – type locality for species • †Palaeoryctes puercensis • †Palaeoryctes punctatus • †Palaeosinomenium – or unidentified comparable form • †Palaeosinomenium venablesii • †Palaeosinopa • †Palaeosinopa didelphoides • †Palaeosinopa dorri – type locality for species • †Palaeosinopa incerta – type locality for species • †Palaeosinopa lacus – type locality for species • †Palaeosinopa lutreola • †Palaeosinopa veterrima • †Palaeosyops'' • †Palaeosyops fontinalis • †Palaeosyops paludosus – type locality for species • †Palaeosyops robustus – type locality for species • †Palaeotheca • †Palaeotheca terrestris – type locality for species • †Palaeoxantusia – type locality for genus • †Palaeoxantusia amara – type locality for species • †Palaeoxantusia fera – type locality for species • †Palatobaena – type locality for genus • †Palatobaena bairdi – type locality for species • †Palatobaena gaffneyi – type locality for species • †Palecphora • †Palecphora patefacta – type locality for species • †Palenochtha • †Palenochtha minor • †Palenochtha weissae – type locality for species • †Paleoamphiuma – type locality for genus • †Paleoamphiuma tetradactylum – type locality for species • †Paleomyrtinaea • †Paleomyrtinaea FW66 informal • †Paleonelumbo • †Paleonelumbo macroloba • †Paleonuphar • †Paleonuphar hesperium • †Paleotomus • †Paleotomus carbonensis – type locality for species • †Paleotomus milleri – type locality for species • †Paleotomus radagasti • †Palepidophyma – type locality for genus • †Palepidophyma lilliputiana – type locality for species • †Palepidophyma paradisa – type locality for species • Paliurus • †Paliurus colombi • †Palmocarpon • †Palmocarpon subcylindricum • †Pandaniidites • †Pandaniidites radicus • Panthera • , or lion †Panthera leo'' • †Pantolambda • †Pantolambda cavirictus • †Pantolambda intermedius – or unidentified comparable form • †Pantolestes • †Pantolestes longieundus – type locality for species • †Pantolestes natans – or unidentified comparable form • †Paracathartes • †Paracathartes howardae • †Paracosoryx • †Paracosoryx wilsoni • †Paracynarctus • †Paracynarctus kelloggi • †Paradjidaumo • †Paradjidaumo hypsodus • †Paradjidaumo trilophus • †Paraenhydrocyon • †Paraenhydrocyon josephi • †Paraenhydrocyon robustus • †Paraenhydrocyon wallovianus • †Paraepicrates • †Paraepicrates brevispondylus – type locality for species • †Paraglyptosaurus • †Paraglyptosaurus princeps – type locality for species • †Parahippus • †Parahippus pawniensis • †Parahippus pristinus – tentative report • †Parahippus wyomingensis – type locality for species • †Paralatindia • †Paralatindia saussurei – type locality for species • †Paramerychyus • †Paramerychyus harrisonensis • †Paramerychyus relictus • †Paramys • †Paramys adamus – type locality for species • †Paramys compressidens • †Paramys copei • †Paramys delicatior • †Paramys delicatus • †Paramys excavatus • †Paramys leptodus • †Paramys pycnus • †Paramys relictus • †Paramys taurus • †Parandrita • †Parandrita vestita – type locality for species • †Paranolis – type locality for genus • †Paranolis delicatus – type locality for species • †Paranymphaea • †Paranymphaea crassifolia • †Paranymphea • †Paranymphea crassifolia • †Parapliosaccomys • †Parapliosaccomys transversus • †Paraprionosaurus – type locality for genus • †Paraprionosaurus wyomingensis – type locality for species • †Parapternodus • †Parapternodus antiquus – type locality for species • †Pararyctes • †Pararyctes pattersoni – type locality for species • †Parasauromalus – type locality for genus • †Parasauromalus olseni – type locality for species • †Paraternstroemia • †Paraternstroemia hyphovenosa • †Paratomarctus • †Paratomarctus temerarius • (upper right) †Paratylopus'' • †Paratylopus labiatus • †Paratylopus primaevus • †Parectypodus • †Parectypodus clemensi • †Parectypodus lunatus • †Parectypodus sinclairi • †Parectypodus sylviae • †Pareumys • †Pareumys grangeri • †Parictis • †Parictis dakotensis • †Parictis gilpini • †Parictis parvus • †Parictis personi • †Paromomys • †Paromomys depressidens • †Paromomys maturus • †Parophisaurus • †Parophisaurus pawneensis • †Parvericius • †Parvericius montanus • †Parvileguminophyllum • †Parvileguminophyllum coloradensis • †Parvitragulus • †Parvitragulus priscus • . Charles R. Knight (1896). †Patriofelis • †Patriofelis ferox – type locality for species • †Patriofelis ulta • †Patriomanis • †Patriomanis americanus • †Pauromys • †Pauromys schaubi – type locality for species • †Peltosaurus • †Pelycodus • †Pelycomys • †Pelycomys placidus • †Penetrigonias • †Penetrigonias dakotensis • †Penosphyllum • †Penosphyllum cordatum • †Pentacemylus – tentative report • †Pentacodon • †Pentacosmodon • †Pentacosmodon pronus – type locality for species • †Peradectes • †Peradectes californicus • †Peradectes chesteri • †Peradectes elegans – type locality for species • †Peradectes protinnaminatus • †Peradectes protinnominatus • †Peratherium'' • †Peratherium comstocki • †Peratherium edwardi • †Peratherium marsupium • †Perchoerus • †Perchoerus minor • †Periptychus • †Periptychus carinidens • †Periptychus coarctatus • Perognathus • †Perognathus furlongi • , or deer mouse Peromyscus'' • Persea • †Persea brossiana • †Persea coriacea – type locality for species • †Persea pseudocarolinensis • †Perseoxylon • †Perseoxylon aromaticum • †Persites • †Persites argutus • †Petauristodon • †Phalaenoptilus • †Phalaenoptilus nuttallii • †Phareodus • †Phareodus encaustus • †Phareodus testis • †Phenacocoelus • †Phenacocoelus typus • †Phenacodaptes • †Phenacodaptes sabulosus – type locality for species • †Phenacodontid • . Charles R. Knight (1898). †Phenacodus'' • †Phenacodus bisonensis – type locality for species • †Phenacodus grangeri • †Phenacodus intermedius • †Phenacodus magnus • †Phenacodus matthewi • †Phenacodus trilobatus • †Phenacodus vortmani • †Phenacolemur • †Phenacolemur fortior – type locality for species • †Phenacolemur mcgrewi – type locality for species • †Phenacolemur praecox • †Phenacolemur shifrae • †Phenacolemur simonsi • †Phenacolemur cavatus – type locality for species • Phenacomys • †Phenacomys longicaudus • †Phenolia • †Phenolia incapax – type locality for species • Philhydrus • †Philodendron – or unidentified related form • †Philodendron RR61 informal • †Philotrox • †Philotrox condoni • †Phlaocyon'' • †Phlaocyon annectens • †Phlaocyon leucosteus • †Phlaocyon minor • †Phlaocyon multicuspus • †Phoebe • Phragmites – tentative report • †Phragmites latissima • †Phyllites • †Phyllites crassifolia • †Phyllites demoresi • weevil Phyllobius'' • †Phyllobius avus • Physa • Phytocrene • †Phytocrene sordida • Pica • †Pica pica • †Piceoerpeton – type locality for genus • †Piceoerpeton willwoodense – type locality for species • †Picrodus • †Picrodus calgariensis • †Picrodus canpacius • †Picrodus silberlingi • †Picromomys • †Picromomys petersonorum – type locality for species • , or pine tree Pinus'' • †Pinus balli • †Pinus florissanti • †Pinus GR542 informal • †Pinus gracilistrobus • †Pinus iddingsi • †Pinus Lesquereux • †Pinus macrolepis • †Pinus premurrayana • †Pinus wardii • †Pipestoneomys • †Pipestoneomys bisulcatus – or unidentified comparable form • Pipilo • , or green-tailed towhee †Pipilo chlorurus'' • †Plagioctenodon • †Plagioctenodon krausae • †Plagioctenodon rosei • †Plagioctenodon savagei • †Plagioctenodon thewisseni – type locality for species • †Plagioctenodon dawsonae – type locality for species • †Plagioctenodon goliath – type locality for species • †Plagioctenoides • †Plagioctenoides microlestes – type locality for species • †Plagioctenoides tombowni – type locality for species • †Plagioctenoides cryptos – type locality for species • †Plagiomene • †Plagiomene accola • †Plagiomene multicuspis • †Planatus • †Planatus raynoldsi • , or water elm tree †Planera'' • †Planera longifolia • †Planetetherium • †Planetetherium mirabile • †Planetochelys • †Planetochelys dithyros • †Planorbina • †Planorbina pseudoammonius • †Plastomenoides • †Plastomenoides lamberti • †Plastomenus • †Plastomenus molopinus • †Plastomenus oedemius – type locality for species • †Plastomenus tantillus – type locality for species • †Plastomenus thomasi • †Plastomenus visendus – type locality for species • †Plataninium • †Plataninium haydeni • †Platanophyllum • †Platanophyllum whitneyi • , or plane tree Platanus'' • †Platanus brownii • †Platanus GR552 informal • †Platanus gracilis • †Platanus guillelmae • †Platanus montana • †Platanus raynoldsi • †Platanus raynoldsii • †Platanus wyomingensis • Platycarya • †Platycarya americana • †Platycarya BB09 informal • †Platycarya castaneopis • †Platycarya castaneopsis • Platynus • †Platynus caesus – type locality for species • †Platynus senex – type locality for species • Plecia • †Plecia dejecta – type locality for species • †Plecia pealei – type locality for species • †Plesiadapis'' • †Plesiadapis anceps – type locality for species • †Plesiadapis churchilli • †Plesiadapis cookei • †Plesiadapis dubius • †Plesiadapis fodinatus – type locality for species • †Plesiadapis gingerichi • †Plesiadapis praecursor • †Plesiadapis rex • †Plesiadapis simonsi – type locality for species • †Plesiolestes • †Plesiolestes problematicus – type locality for species • †Pliophenacomys • †Pliophenacomys meadensis • †Pliophenacomys primaevus • †Poabromylus • †Poabromylus golzi • †Poebrodon • †Poebrotherium'' • †Poebrotherium eximium • †Poebrotherium wilsoni • †Poliomyia – type locality for genus • †Poliomyia recta – type locality for species • †Pollyosbornia • †Pollyosbornia altidens – or unidentified comparable form • Polygyra • †Pontifactor • †Pontifactor bestiola – type locality for species • , or poplar tree Populus'' • †Populus balsamoides • †Populus cinnamomoides • †Populus daphnogenoides • †Populus FW60 informal • †Populus glandulifera • †Populus meigsii • †Populus nebraskana • †Populus speciosa • †Populus vivaria • †Populus wilmattae • †Populus wyomingiana • †Populus xantholithensis • Porzana • †Porzana carolina • †Potamogeton • †Premnoides • †Premnoides douglassi • †Presbyornis'' • †Primobucco • †Primobucco kistneri • †Primobucco mcgrewi • †Princetonia • †Princetonia yalensis • †Priscacara • †Priscachara • †Pristichampsus • †Probathyopsis • †Probathyopsis harrisorum • †Probathyopsis lysitensis • †Probathyopsis praecursor • †Problastomeryx • †Problastomeryx primus – type locality for species • †Procaimanoidea • †Procaimanoidea kayi – type locality for species • †Procamelus • †Procamelus grandis • †Procerberus • †Procerberus formicarum – or unidentified comparable form • †Procerberus grandis – or unidentified comparable form • †Prochetodon • †Prochetodon cavus – type locality for species • †Prochetodon foxi • †Prochetodon taxus – type locality for species • †Procydnus – tentative report • †Procydnus mamillanus – type locality for species • †Procynodictis • †Procynodictis vulpiceps • †Prodiacodon • †Prodiacodon concordiarcensis – type locality for species • †Prodiacodon furor – or unidentified comparable form • †Prodiacodon puercensis – or unidentified comparable form • †Prodiacodon tauricinerei • †Proharrymys • †Proharrymys schlaikjeri • †Prolimnocyon • †Prolimnocyon antiguus • †Prolimnocyon antiquus • †Prolimnocyon atavus • †Prolimnocyon eerius • †Prolimnocyon haematus – type locality for species • †Promartes • †Promartes lepidus • †Promartes olcotti • †Promartes vantasselensis • -like oreodont Promerycochoerus both onshore and in the water. Robert Bruce Horsfall (1913). †Promerycochoerus • †Promerycochoerus carrikeri • †Promerycochoerus superbus • †Promioclaenus • †Promioclaenus acolytus • †Promioclaenus pipiringosi – type locality for species • †Pronemobius • †Pronemobius induratus – type locality for species • †Pronemobius tertiarius – type locality for species • †Pronothodectes • †Pronothodectes jepi – type locality for species • †Propalaeanodon – type locality for genus • †Propalaeanodon schaffi – type locality for species • †Proscalops • †Proscalops miocaenus • †Proscalops secundus – or unidentified comparable form • †Prosciurus • †Prosciurus vetustus • †Protadjidaumo – tentative report • †Protadjidaumo typus • †Protagras – type locality for genus • †Protagras lacustris – type locality for species • †Protamphipteryx – type locality for genus • †Protamphipteryx basalis – type locality for species • †Prothryptacodon • †Prothryptacodon furens • †Prothryptacodon hilli – type locality for species • †Protictis • †Protictis agastor – type locality for species • †Protictis aprophatos • †Protictis haydenianus • †Protictis microlestes • †Protictis paralus • †Protoboysia • †Protoboysia complicata • . Charles R. Knight (1896). †Protoceras'' • †Protoceras neatodelpha – type locality for species • †Protochelydra • †Protochelydra zangerli – or unidentified comparable form • †Protochriacus • †Protochriacus simplex – or unidentified comparable form • †Protohippus • †Protohippus perditus – or unidentified comparable form • †Protolabis • †Protolabis heterodontus – or unidentified comparable form • †Protomarctus • †Protomarctus optatus • †Protopsalis • †Protoptychus • †Protoptychus hatcheri • †Protoreodon • †Protoreodon parvus – or unidentified comparable form • †Protoreodon petersoni – or unidentified comparable form • †Protoreodon pumilus • †Protorohippus'' • †Protorohippus montanum • †Protorohippus venticolum • †Protoselene – tentative report • †Protoselene novissimus – type locality for species • †Protospermophilus • †Protospermophilus kelloggi • †Protostrix • †Protostrix leptosteus • †Protostrix saurodosis – type locality for species • †Prototomus • †Prototomus deimos – type locality for species • †Prototomus martis – type locality for species • †Prototomus phobos • †Prototomus robustus • †Prototomus secundarius • †Protungulatum • †Protungulatum donnae • †Protungulatum gorgun • †Protungulatum sloani • †Protylopus'' • †Protylopus petersoni • †Provaranosaurus – type locality for genus • †Provaranosaurus acutus – type locality for species • †Provaranosaurus fatuus – type locality for species • †Proviverroides • †Proviverroides piercei • †Proxestops • †Proxestops silberlingii – type locality for species • Prunus • †Prunus corrugis • †Prunus stewarti • †Pseudaelurus'' • †Pseudaelurus intrepidus • †Pseudhipparion • †Pseudhipparion retrusum • †Pseudoblastomeryx • †Pseudoblastomeryx advena • †Pseudocemophora • †Pseudocemophora antiqua – or unidentified comparable form • †Pseudocrypturus – type locality for genus • †Pseudocrypturus cercanaxius – type locality for species • †Pseudocylindrodon • †Pseudocylindrodon medius • †Pseudocylindrodon tobeyi • †Pseudodesmatochoerus – type locality for genus • †Pseudodesmatochoerus hoffmani – type locality for species • †Pseudolabis • †Pseudolabis dakotensis • †Pseudopalaeocastor • †Pseudopalaeocastor osmagnus • †Pseudoprotoceras'' • †Pseudoprotoceras longinaris • †Pseudoprotoceras minor – type locality for species • †Pseudoprotoceras taylori • †Pseudotetonius • †Pseudotetonius ambiguus • †Pseudotheridomys • †Pseudotheridomys pagei – or unidentified comparable form • †Pseudotomus • †Pseudotomus hians – type locality for species • †Pseudotomus horribilis – type locality for species • †Pseudotomus robustus – type locality for species • †Psilosemys – type locality for genus • †Psilosemys wyomingensis – type locality for species • †Psilota • †Psilota tabidosa – type locality for species • †Psittacotherium'' • †Psittacotherium multifragum • Ptelea • †Ptelea cassioides • Pteris – or unidentified related form • †Pteris silvicola • Pterocarya • †Pterocarya glabra • †Pterocarya hispida • †Pterocarya macginitii • †Pteromogoplistes • †Pteromogoplistes smithii – type locality for species • †Pterospermites • †Pterospermites haguei • †Ptilodus'' • †Ptilodus fractus • †Ptilodus gnomus • †Ptilodus kummae • †Ptilodus mediaevus • †Ptilodus montanus – or unidentified comparable form • †Ptilodus tsosiensis – or unidentified comparable form • †Ptilodus wyomingensis – type locality for species • †Pulverflumen • †Pulverflumen magnificum – type locality for species • Puma • †Puma concolor • Pupilla – or unidentified comparable form • †Pyramidula • †Pyramidula ralstonensis • †Pyrocyon • †Pyrocyon dioctetus ==Q==

• †Quadratomus • †Quadratomus grandis • †Quadratomus grossus • †Quadratomus sundelli • †Quercinium • †Quercinium knowltoni • †Quercinium lamarense • , or oak tree Quercus'' • †Quercus consimilis – tentative report • †Quercus culveri • †Quercus cuneatus – type locality for species • †Quercus drymeja • †Quercus furcinervis • †Quercus GR522 informal • †Quercus GR575 informal • †Quercus greenlandica • †Quercus grosidentata • †Quercus hesperia • †Quercus magnifolia • †Quercus olafseni • †Quercus petros – type locality for species • †Quercus sullyi • †Quercus weedii • †Quercus yanceyi • †Quereuxia • †Quereuxia angulata • , or grackle Quiscalus'' – or unidentified comparable form ==R==

• and Cosoryx. Robert Bruce Horsfall (1913). †Ramoceros'' • †Rapamys • †Rapamys wilsoni • †Raphictis • †Raphictis gausion – type locality for species • †Reithroparamyine • †Reithroparamys • †Reithroparamys delicatissimus – type locality for species • †Reithroparamys huerfanensis • †Restes – type locality for genus • †Restes rugosus – type locality for species • †Reticuloidosporites • †Reticuloidosporites pseudomurii • †Rhamnacinium • †Rhamnacinium radiatum • †Rhamnus • †Rhamnus cleburni • †Rhamnus hirsuta • †Rhamnus rectinervis • Rhineura – type locality for genus • †Rhineura hatcherii – type locality for species • Rhinoclemmys – report made of unidentified related form or using admittedly obsolete nomenclature • †Rhinoclemmys terrestris • Rhus • †Rhus mixta – tentative report • leaf †Rhus nigricans'' • †Rhyssa • †Rhyssa juvenis – type locality for species • †Robinia'' • †Robinia wardi • Rosa • †Rosa hilliae • †Rymosia • †Rymosia strangulata – type locality for species ==S==

• , or palmettos Sabal'' • †Sabal grayana • †Sabal powelli • †Sabalitesamesoneuron • †Sabalitesamesoneuron RR34 informal • †Saccoloma • †Saccoloma gardneri • †Sackenia • †Sackenia gibbosa – type locality for species • †Salilx • †Salilx longiacuminata • , or willow Salix'' • †Salix angusta • †Salix aquilina • †Salix cockerelli • †Salix elongata – tentative report • †Salix lavateri • †Salix varians • †Salpinctes – or unidentified comparable form • †Salpinctes obsoletus • †Salvinia • †Salvinia preauriculata • †Sanctimus • †Sanctimus simonisi – type locality for species • †Sanctimus stouti – type locality for species • †Sanctimus stuartae • †Saniwa'' – type locality for genus • †Saniwa ensidens – type locality for species • †Saniwa major – type locality for species • †Saniwa stenodon • †Sapindaceous • †Sapindus • †Sapindus alatus • †Sapindus grandifolioloides • †Sapindus grandifoliolus • †Sapindus wardii • Sassafras • †Sassafras thermale • †Scalopoides • †Scapherpeton • †Scapherpeton tectum • †Scenopagus • †Scenopagus curtidens • †Scenopagus edenensis • †Scenopagus hewettensis – type locality for species • †Scenopagus priscus • †Schaubeumys • †Schaubeumys sabrae • †Schizodontomys • †Schizodontomys harkseni • †Schizodontomys sulcidens • †Schoepfia'' • †Schoepfia republicensis • Sciara • †Sciara scopuli – type locality for species • †Scincoideus • †Scincoideus grassator – type locality for species • Sciomyza – tentative report • †Sciomyza disjecta – type locality for species • †Sciomyza manca – type locality for species • †Sciophila • †Sciophila hyatti – type locality for species • †Sciuravus • †Sciuravus bridgeri – type locality for species • †Sciuravus nitidus – type locality for species • †Sciuravus popi – or unidentified comparable form • †Sciuravus wilsoni • †Scottimus • †Scottimus ambiguus – or unidentified comparable form • †Scottimus kellamorum – type locality for species • †Scottimus viduus • †Selenaletes • †Selenaletes scopaeus • Sequoia • †Sequoia couttsiae • †Sequoia langsdorfii • †Sequoia magnifica • †Sespia'' • †Sespia nitida • †Shoshonius • †Shoshonius bowni • †Shoshonius cooperi • †Sialia • †Sifrhippus • †Sifrhippus grangeri • †Sifrhippus sandrae • †Sigynorum – type locality for genus • †Sigynorum magnadivisus – type locality for species • †Simoedosaurus • †Simpsonictis • †Simpsonictis jaynanneae – type locality for species • †Simpsonictis pegus – type locality for species • †Simpsonictis tenuis • †Simpsonlemur • †Simpsonlemur citatus • †Simpsonlemur jepseni – or unidentified comparable form • †Sinclairella • †Sinomenium – or unidentified related form • †Sinomenium RR08 informal • †Sinopa'' • †Sinopa agilis – type locality for species • †Sinopa major – type locality for species • †Sinopa minor • †Sinopa rapax – type locality for species • †Sinopa viverrinus • †Siphonophoroides • †Siphonophoroides antiqua – tentative report • Siren • †Siren dunni – type locality for species • Sitona • †Sitona grandaevus – type locality for species • †Sitona paginarum • Sloanea – or unidentified related form • †Sloanea RR18 informal • †Smilax • †Smilax GR550 informal • †Smilax lamarensis • †Smilodectes'' • †Smilodectes gibossus – type locality for species • †Smilodectes gracilis – type locality for species • †Smilodectes mcgrewi – type locality for species • †Smilodectes sororis – type locality for species • Sorex • †Sorex hoyi • †Sparganium • †Sparganium stygium • †Spathorhynchus – type locality for genus • †Spathorhynchus fossorium – type locality for species • †Spathorhynchus natronicus • Spermophilus • †Spermophilus primitivus • †Spermophilus variegatus • †Sphacorhysis • †Sphacorhysis burntforkensis – type locality for species • †Sphenocoelus'' • †Sphenocoelus hyognathus • †Sphenocoelus uintensis • Spirodela • †Spirodela magna • †Spiza • †Spiza americana • †Spurimus • †Spurimus scotti • †Spurimus selbyi • Stagnicola • †Staphylinites • †Staphylinites obsoletum – type locality for species • †Stegobium • †Stegobium defunctus – type locality for species • †Steinius • †Steinius annectens – type locality for species • †Steinius vespertinus • †Steneofiber • †Steneofiber fossor • †Steneofiber gradatus • †Stenocinclis – type locality for genus • †Stenocinclis anomala – type locality for species • †Stenogomphus • †Stenogomphus scudderi – type locality for species • †Stenomylus'' • †Stenomylus gracilis • †Stenomylus hitchcocki • †Stenomylus keelinensis • †Stenopelta • †Stenopelta punctulata – type locality for species • Sterculia • †Sterculia coloradensis • †Stibarus • †Stibarus quadricuspis • †Stibarus yoderensis • †Stillingia • †Stillingia casca • †Straitopollis • †Straitopollis tectatus • †Strigorhysis – type locality for genus • †Strigorhysis bridgerensis – type locality for species • †Strigorhysis rugosus • Sturnella • †Sturnella neglecta • †Stygimys • †Stygimys gratus • †Stygimys kuszmauli • †Stylemys'' • †Stylemys nebrascensis • †Stylinodon • †Stylinodon mirus – type locality for species • †Styrax • †Styrax transversa • †Subhyracodon • †Subhyracodon mitis • †Subhyracodon occidentalis • Surnia • †Surnia ulula • †Suzanniwana – type locality for genus • †Suzanniwana patriciana – type locality for species • †Suzanniwana revenanta – type locality for species • †Swaindelphys • †Swaindelphys cifellii – type locality for species • †Swainiguanoides – type locality for genus • †Swainiguanoides milleri – type locality for species • †Swartzia • †Swartzia wardelii – type locality for species • Sylvicola – type locality for genus • †Sylvicola cadaver – type locality for species • Sylvilagus • Symplocos • †Symplocos exilis • Synaptomys • †Syncolporites • †Syncolporites minimus • †Syndyoceras'' • †Syndyoceras cooki • †Syntomostylus • †Syntomostylus fortis – type locality for species • Syrphus • †Systemodon • †Systemodon tapirinus • †Syzygioides • †Syzygioides americana ==T==

• Tachycineta – or unidentified comparable form • †Tachycineta bicolor • †Taeniolabis'' • †Taeniolabis taoensis • †Talpavoides • †Talpavoides dartoni – type locality for species • †Talpavus • †Talpavus duplus • †Talpavus nitidus • †Talpavus sullivani – type locality for species • Tamias • †Tamias ateles – or unidentified comparable form • †Tanymykter • †Tanymykter brachyodontus • †Tapocyon'' • †Tapocyon robustus – or unidentified comparable form • †Tarka • †Tarka stylifera • †Tatmanius – type locality for genus • †Tatmanius szalayi – type locality for species • Taxidea • †Taxidea taxus • †Taxites • †Taxites olriki • Taxodium • †Taxodium olriki • †Taxodium olrikii • †Taxonus • †Taxonus nortoni – type locality for species • †Taxymys • †Taxymys lucaris • †Teilhardina'' • †Teilhardina americana – type locality for species. Late reclassified in the new genus Bownomomys as the species B. americanus. • †Teilhardina brandti – type locality for species • †Teilhardina crassidens – type locality for species. Later reclassified as Bownomomys crassidens. • †Teilhardina demissa – type locality for species • †Teilhardina gingerichi • †Teilhardina mathewi • †Teilhardina tenuicula • †Teleoceras • †Telmatherium • †Telmatherium validum – or unidentified comparable form • †Telmatherium validus – type locality for species • †Telmatrechus • †Telmatrechus parallelus – type locality for species • †Temnocyon • †Temnocyon macrogenys – type locality for species • †Temnotrionyx – type locality for genus • †Temnotrionyx manducans – type locality for species • †Teretrum • †Teretrum quiescitum – type locality for species • †Ternstroemites • †Ternstroemites aureavallis • †Tetigonia • †Tetigonia priscomarginata – type locality for species • †Tetigonia priscovariegata – type locality for species • †Tetonius • †Tetonius matthewi – type locality for species • †Tetonoides • †Tetonoides pearcei • †Tetraclaenodon • †Tetraclaenodon puercensis • †Tetrapassalus • †Tetrapassalus proius – type locality for species • †Thamnotettix • †Thamnotettix gannetti – type locality for species • †Thamnotettix mutilata – type locality for species • , or maiden fern Thelypteris'' • †Thelypteris iddingsi • †Thelypteris iddingsii • †Thinocyon • †Thisbemys • †Thisbemys brevicrista • †Thisbemys corrugatus – type locality for species • †Thisbemys perditus • †Thouinia • †Thouinia eocenica • †Thryptacodon • †Thryptacodon antiquus • †Thryptacodon australis • †Thryptacodon barae • †Thryptacodon orthogonius – type locality for species • †Thryptacodon pseudarctos • †Thuites • †Thuites interruptus • †Thuja • †Thuja interrupta • †Thuja interruptus • †Thylacaelurus • †Thylacaelurus montanus – or unidentified comparable form • †Thylacodon • †Thylacodon pusillus • , the genus including the lindens and basswoods Tilia'' • †Tilia populifolia • †Tillodon • †Tillodon fodiens – type locality for species • †Tillomys • †Tillomys parvidens – type locality for species • †Tillomys senex • †Tinimomys • †Tinimomys graybulliensis • †Tinimomys loomisi • †Tinimomys tribos – type locality for species • Tinosaurus – type locality for genus • †Tinosaurus pristinus – type locality for species • †Tinosaurus stenodon – type locality for species • Tipula • †Tipula sepulchri – type locality for species • †Tipula spoliata – type locality for species • †Titanoides'' • †Titanoides gidleyi – type locality for species • †Titanoides major • †Titanoides nanus – type locality for species • †Titanoides primaevus • †Titanomyrma • with a rufous hummingbird for scale †Titanomyrma lubei'' – type locality for species • †Torrejonia • †Torrejonia sirokyi – type locality for species • †Toxotherium • †Toxotherium hunteri • Trapa • †Trapa angulata • †Trapa paulula • †Tremanotus • †Tremanotus angustata • †Triatriopollenites • †Triatriopollenites granulatus • †Triatriopollenites granulus • †Tricalpites • †Tricalpites parvus • †Tricentes • †Tricentes subtrigonus • †Tricolpites • †Tricolpites anguloluminosus + bathyreticulatus • †Tricolpites anguloluminosus + bothyreticulatus • †Tricolpites angulolumonosus + bathyreticulatus • †Tricolpites mutabilis • †Tricolpites parvus • †Trigenicus • †Trigenicus profectus • †Trigonias • †Trigonias osborni • †Trigonorhinus • †Trigonorhinus pristinus – type locality for species • Trionyx • †Trionyx concentricus – type locality for species • †Trionyx thomasii – type locality for species • †Triplopus • †Triplopus cubitalis – type locality for species • †Triplopus implicatus – type locality for species • †Triplopus obliquidens – or unidentified comparable form • †Tritemnodon'' • †Tritemnodon strenuus • †Tritoma • †Tritoma binotata – type locality for species • †Triumfetta • †Triumfetta ovata • †Trochodendroides • †Trochodendroides flabella • †Trogolemur • †Trogolemur amplior – type locality for species • †Trogolemur fragilis – type locality for species • †Trogolemur myodes – type locality for species • †Trogosus • †Trogosus castoridens – type locality for species • †Trogosus gazini – type locality for species • †Trogosus latidens • †Tropideres • †Tropideres remotus – type locality for species • †Tropisternus • †Tropisternus saxialis – type locality for species • †Tropisternus sculptilis – type locality for species • †Trypodendron • †Trypodendron impressus – type locality for species • †Tsoabichi – type locality for genus • †Tsoabichi greenriverensis – type locality for species • †Tubulodon • †Tubulodon atopum • †Tubulodon pearcei • †Tubulodon taylori • †Tubulodon woodi • Turdus – or unidentified comparable form • †Turdus migratorius • †Tuscahomys • †Tuscahomys ctenodactylops – type locality for species • †Tuscahomys major – or unidentified comparable form • †Tuscahomys walshi – type locality for species • †Tuscahomys worlandensis • †Tylocephalonyx • †Tylocephalonyx skinneri • Tympanuchus • , or sharp-tailed grouse †Tympanuchus phasianellus'' • Typha – or unidentified related form • †Tytthaena • †Tytthaena lichna • †Tytthaena parrisi – type locality for species ==U==