List of the Paleozoic life of Utah

• †Acanthopecten • †Acanthopecten carboniferus • †Acanthopecten coloradoensis • †Achlysopsis • †Achlysopsis liokata – or unidentified comparable form • †Achlysopsis punctatum • †Acidiphorus • †Acidiphorus brevis – or unidentified comparable form • †Acidiphorus brevus • †Acidiphorus brighti • †Acidiphorus pseudobathurus • †Acidiphorus unicorna – type locality for species • †Acidiphorus wahwahensis • †Acidiphorus williamsi – type locality for species • †Acinocricus • †Acinocricus stichus • †Acodus • †Acodus similaris • †Acontiodus • †Acontiodus coniformis • †Acrothele • †Acrothele subsidua • †Acrotreta • †Adiantites • †Adiantites tenuifolius • †Aesiocrinus • †Aesiocrinus secundus – type locality for species • †Agnostus'' • †Agnostus neglectus • †Allorisma • †Allorynchus • †Alokistocare • †Alokistocare carnatum • †Alokistocare harrisi • †Alokistocare idahoense • †Alokistocare normale • †Alokistocare subcoronatum • †Alokistocarella • †Alokistocarella brighamensis • †Altiocculus • †Altiocculus concavus • †Altiocculus drumensis • †Amblycranium • †Amblycranium cornutum • †Amblycranium linearus – type locality for species • †Amblycranium variabile • †Amecephalus • †Amecephalus laticudum • †Ameura – tentative report • †Ammagnostus • †Ammagnostus beltensis • †Amphiscapha • †Amplexizaphrentis • †Amplexizaphrentis paucicinctus • †Amplexizaphrentis spinulosus • †Amplexizaphrentis subcrassus • †Amplexocarina • †Amplexus • †Anabarochilna • †Anabarochilna australis – or unidentified comparable form • †Ananias • †Ananias nevadensis – or unidentified related form • †Ancillotoechia • †Ancillotoechia perryi – type locality for species • †Anemonaria • †Anemonaria delicatula • †Angulotreta • †Angyomphalus • †Angyomphalus regularis • †Anidanthus • †Anidanthus echaris • †Anisopyge • †Anisotrypa • †Annularia • †Annularia stellata • †Annulispongia – type locality for genus • †Annulispongia interrupta – type locality for species • †Anomalocaris'' • †Anomalocaris nathorsti • †Anomalorthis • †Anomalorthis lambda • †Anomalorthis oklahomensis • †Anomalorthis utahensis • †Anomphalus • †Anomphalus rotulus • †Anthaspidella • †Anthracospirifer • †Anthracospirifer increbescens • †Anthracospirifer leidyi • †Anthracospirifer occiduus • †Antiquatonia • †Antiquatonia portlockianus • †Antiquatonia sulcatus – or unidentified comparable form • †Apachella • †Apatognathus • †Aphelaspis • †Aphelaspis haguei • †Aphelotoxon • †Aphelotoxon acuminata • †Apheoorthis • †Apheoorthis melita – or unidentified comparable form • †Apheorthis • †Apheorthis meeki – or unidentified comparable form • †Archaeocalamites • †Archaeocalamites scrobiculatus • †Archaeocothurnus – tentative report • †Archaeocothurnus bifida – type locality for species • †Archaeoscyphia • †Archaeoscyphia rossi • †Archeocalamites • †Archeocalamites radiatus • †Archeoschyphia • †Archimedes'' • †Archimedes macfarlani • †Archimedes owenanus • †Arcuolimbus • †Arenicolites • †Arroyocrinus • †Arroyocrinus stokesi – type locality for species • †Arthrophycus – tentative report • †Artisia • †Asaphelina • †Asaphellus – tentative report • †Asaphiscus'' • †Asaphiscus wheeleri • †Ascopora • †Ascopora macellata • †Astartella • †Astartella subquadrata • †Asterophyllites • †Asterophyllites charaeformis • †Asterophyllites equisetiformis • †Asterophyllites longifolius • †Athabaskia • †Athabaskia bithus • †Athabaskia wasatchensis • †Athyridacid • †Athyris • †Athyris lamellosa • †Atrypa'' • †Atrypa hedei • †Atrypa parva – or unidentified comparable form • †Atrypid • †Aulacoparia – tentative report • †Aulacoparia quadrata • †Aulacoparia venta • †Aulacotheca • †Aulacotheca campbellii • †Aulacotheca hemingwayi • †Aulopora – tentative report • †Aviculopecten • †Aviculopecten girtyi • †Aviculopecten kaibabensis – or unidentified comparable form • †Aviculopinna • †Aviculopinna peracuta – tentative report • †Aysheaia'' ==B==

• †Babylonites • †Babylonites conoideus • †Bakevellia • †Baltagnostus • †Baltagnostus eurypyx • †Barrandia – tentative report • †Bathymyonia • †Bathymyonia nevadensis • †Bathyurellus • †Bathyurellus feitleri • †Bathyurellus pogonipensis • †Bathyurellus pogonopensis • †Bathyurellus teretus – type locality for species • †Bathyuriscus • †Bathyuriscus brighamensis • †Bathyuriscus elegans • †Bathyuriscus fimbriatus • †Bathyuriscus wasatchensis • †Bayfieldia • †Bearriverops • †Bearriverops alsacharovi – type locality for species • †Bearriverops borderinnensis – type locality for species • †Bearriverops deltaensis – type locality for species • †Bearriverops ibexensis – type locality for species • †Bearriverops loganensis • †Beckwithia • †Beckwithia typa • †Belemnospongia • †Belemnospongia neofascicularis – type locality for species • †Bellazona • †Bellazona bella • †Bellazona polita – type locality for species • †Bellefontia • †Bellefontia acuminiferentis • †Bellefontia chamberlaini • †Bellefontia ibexensis • †Benthamaspis • †Benthamaspis diminutiva • †Benthamaspis gibberula – type locality for species • †Benthamaspis obrepta • †Beyrichoceras • †Bighornia • †Billingsella • †Biscoia • †Blastoidocrinus • †Blastoidocrinus carchariaedens – or unidentified comparable form • †Blountia • †Bolaspidella • †Bolaspidella contracta • †Bolaspidella housensis • †Bolaspidella type locality for species – informal • †Bolaspidella wellsvillensis • †Bolbocephalus • †Bollandoceras • †Bollandoceras occidentale – type locality for species • †Bonneterrina • †Bourbonnella • †Bourbonnella jocelynae – type locality for species • †Bowmania • †Brachyaspidion • †Brachyaspidion microps • †Brachyaspidion sulcatum • †Brachyprion • †Brachyprion geniculata • †Brachythyris • †Branchiocaris'' • †Branchiocaris pretiosa • †Brassicicephalus • †Breckwithia • †Breckwithia typa • †Brodioptera • †Brodioptera stricklani – type locality for species • †Bromella • †Brooksella • †Bucania • †Bythicheilus • †Bythicheilus typicum ==C==

• †Cactocrinus • †Cactocrinus arnoldi • †Calamites'' • †Calamites cistii – or unidentified comparable form • †Calamites cistiiformis • †Calamites gigas • †Calamites hesperius • †Calamites infractus • †Calamites suckowii • †Calamostachys – tentative report • †Calathium • †Calathium yersini – type locality for species • †Callipteris – tentative report • †Callocladia • †Callocladia jensensis • †Calycocoelia • †Calygirtyoceras • †Calygirtyoceras arcticum • †Calygirtyoceras confusionense – type locality for species • †Camarotoechia • †Cambromedusa – type locality for genus • †Cambromedusa furcula – type locality for species • †Camerella • †Campbelloceras – tentative report • (left) †Canadaspis'' • †Canadaspis perfecta – or unidentified comparable form • †Canadia • †Canadiphyllum • †Cancrinella • †Cancrinella phosphatica – or unidentified comparable form • †Caninaphyllum • †Caninaphyllum incrussatum • †Caninia • †Caninia torquia • †Caninophyllum • †Canthylotreta • †Canthylotreta marjumensis • †Cardiomorpha • †Cardiopteris • †Cardiopteris hirta – or unidentified comparable form • †Carolinites • †Carolinites ekphymosus • †Carolinites genacinaca – type locality for species • †Carolinites killarnyensis • †Carolinites killaryensis • †Castericystis • †Castericystis sprinklei – type locality for species • †Castericystis vali – type locality for species • †Catoraphiceras • †Catoraphiceras colon • †Caulpsis • †Caulpsis punctata • †Cavusgnathus • †Cavusgnathus regularis • †Cavusgnathus unicornis • †Cedaria'' • †Cedaria minor • †Cedarina – tentative report • †Cenorhynchia • †Cenorhynchia type locality for species A – informal • †Cernuolimbus • †Cernuolimbus granulosus • †Chaenomya • †Chaetetes • †Chaetetes milleporaceous • †Chancelloria • †Chancelloria eros • †Chancelloria pentacta – type locality for species • †Chancia) • †Chancia ebdome – or unidentified comparable form • †Chanciaopsis – type locality for genus • †Chanciaopsis heteromorphos – type locality for species • †Chanciopsis • †Chanciopsis heteromorphos • †Cheilocephalus • †Chilotrypa • †Choia'' • †Choia carteri • †Choia hindei • †Choia ridleyi • †Choia utahensis • †Chondrites • †Chonetes • †Chonetina • †Chonetina flemingi • †Choristites • †Choristites fritschi – or unidentified comparable form • †Choristites pavlovi – or unidentified comparable form • †Cladochonus'' • †Clathrospira – tentative report • †Clavagnostus • †Clavagnostus repandus • †Cleiothyridina • †Cleiothyridina type locality for species A – informal • †Cleiothyridina type locality for species B – informal • †Clelandia • †Clelandia utahensis • †Cliothyridina • †Cliothyridina orbicularis • †Clonograptus • †Coelogasteroceras • †Coenites • †Colinispongia • †Colinispongia regularis • †Composita'' • †Composita argentea • †Composita mira • †Composita ovata • †Composita parasulcata • †Composita plana • †Composita subtilita • †Composita trilobata • †Composita trinuclea • †Condrathyris • †Condrathyris perplexa • †Conotreta • †Conotreta millardensis • †Coosella • †Coosina • †Cordaianthus • †Cordaianthus pseudofluitans • †Cordaicarpus • †Cordaicarpus binutus – type locality for species • †Cordaicarpus cordatus • †Cordaicarpus elongatus • †Cordaicarpus globosus – type locality for species • †Cordaicarpus jayshulerii – type locality for species • †Cordaicarpus manningcanensis – type locality for species • †Cordaites'' • †Cordaites angulosostriatus • †Cordaites principalis • †Cordaites Sp. A – informal • †Cordaites Sp. B – informal • †Cornucarpus • †Cornucarpus longicaudatus – type locality for species • †Corynepteris • †Corynepteris angustissima • †Costellarina • †Cotalagnostus • Crania • †Crania rowleyi • †Cravenoceras • †Crepicephalus • †Crossopteris – type locality for genus • †Crossopteris mcknightii – type locality for species • †Crossopteris undulata – type locality for species • †Crossopteris utahensis – type locality for species • †Crurithyris • †Crurithyris arcuatus – or unidentified comparable form • †Crurithyris expansa – tentative report • †Cruziana • †Ctenalosia • †Ctenalosia fixata • †Ctenocystis • †Ctenocystis utahensis • †Ctenospondylus • †Ctenospondylus casei – or unidentified related form • †Cyathaxonia • †Cyathocarpus • †Cyathocarpus arborescens • †Cyathocarpus cyatheus • †Cybeloides • †Cybelopsis • †Cybelopsis speciosa • †Cyclopteris'' • †Cyclopteris dilatata • †Cymatospira • †Cymatospira montfortianus • †Cymbiocrinus • †Cymbiocrinus anatonus – type locality for species • †Cymbiocrinus cuneatus – type locality for species • †Cyperites • †Cyperites bicarinatus • †Cyrtia • †Cyrtina • †Cyrtorostra • †Cystodictya • †Cystodictya astrepta ==D==

• †Dalmanellida • †Deiracephalus • †Delaria • †Delaria sevilloidia • †Delocrinus • †Delocrinus subhemisphericus • †Deltina – type locality for genus • †Deltina limba – type locality for species • Dentalium • †Derbyia • †Derbyia bennetti • †Derbyia crassa • †Derbyia sulca • †Derbyia wabashensis • †Desmoinesia • †Desmoinesia muricatina • †Diacanthaspis • †Diacanthaspis trispineus – type locality for species • †Diadectes'' • †Diagoniella • †Diagoniella cyathiformis • †Diagoniella hindei • †Diagoniella magna – type locality for species • †Diagoniella robisoni – type locality for species • †Diaphragmus • †Diaphragmus cestriensis • †Dicanthopyge • †Dicanthopyge convergens • †Dicranocaris • †Dicranocaris guntherorum • †Dictyoclostus • †Dictyoclostus burlingtonensis • †Dictyoclostus inflatus • †Dictyonema • †Dictyonema flabelliforme – or unidentified comparable form • †Didymograptus'' • †Didymograptus artus • †Didymograptus bifidus • †Didymograptus nitidus – or unidentified comparable form • †Dielasma • †Dielasma formosum • †Dielasma phosphoriense • †Dielasma spatulatum • †Dimegelasma • †Dimeropygiella • †Dimeropygiella blanda • †Dimeropygiella caudanodosa – type locality for species • †Dimeropygiella fillmorensis • †Dimeropygiella mccormicki • †Dimeropygiella ovata • †Dimorphoceras • †Dimorphoceras rileyi – type locality for species • †Dimorphoceras worki – type locality for species • †Dioxycaris • †Dioxycaris argenta • †Diparalasma • †Diparelasma • †Diparelasma pogonipensis – or unidentified comparable form • †Diparelasma rowelli • †Diparelasma transversum – or unidentified comparable form • †Diphyphyllum • †Diplagnostus • †Diplagnostus planicauda • †Diplorrhina • †Diplorrhina depressa • †Diplothmema • †Diplothmema arnoldi • †Diplothmema obtusiloba • †Diplothmema trifoliolata • †Diplotrypa – tentative report • †Ditomopyge • †Dolerorthis – tentative report • †Dolerorthis flabellites • †Donaldina • †Dorypyge • †Dorypyge swasii • †Dorypyge wellsvillensis • †Drepanodus • †Drepanodus homocurvatus • †Dresbachia • †Dresbachia amata • †Duartea • †Duartea bruntoni • †Dunbarinella – tentative report • †Dunderbergia • †Dunderbergia anyta • †Dunderbergia bigranulosa – tentative report • †Dyoros • †Dyoros type locality for species A – informal • †Dysoristus • †Dytremacephalus • †Dzhaprakoceras ==E==

• †Echinalosia • †Echinalosia type locality for species A – informal • †Echinaria • †Echinaria semipunctata – or unidentified related form • †Echinauris – or unidentified comparable form • †Echinauris subhorrida • †Echinoconchus • †Echinoconchus elegans • †Echinoconchus semipunctatus • †Echinocrinus • †Ectenonotus • †Ectenonotus progenitor • †Ectenonotus whittingtoni • †Ectosteorhachis'' – or unidentified related form • †Ectosteorhachis nitidus • †Edmondia • †Ehmaniella • †Ehmaniella quadrans – tentative report • †Ekvasophyllum • †Ekvasophyllum inclinatum • †Elburgia • †Elburgia granulosa • †Elburgia intermedia • †Eldonia • †Eldonia ludwigi • †Eleutherocentrus • †Eleutherocentrus petersoni • †Elrathella • †Elrathia'' • †Elrathia kingi • †Elrathiella • †Elrathiella dugwayensa – type locality for species • †Elrathina • †Elrathina spencei • †Elvinia • †Emeraldella • †Endelocrinus • †Endelocrinus matheri • †Endoceras • †Entogonites • †Entogonites acus • †Entogonites borealis • †Entogonites burbankensis – type locality for species • †Eoastarte • †Eoastarte subcircularis • †Eofletcheria • †Eoorthis • †Eriaster – type locality for genus • †Eriaster ibexensis – type locality for species • †Eridopora • †Eridotrypa • †Eridotrypa hindsi • †Eridotrypa subtilis • †Erixanium • †Erixanium carinatum • †Eryops'' • †Euconospira • †Eukrinaster – type locality for genus • †Eukrinaster ibexensis – type locality for species • †Eukteanochiton – type locality for genus • †Eukteanochiton milleri – type locality for species • †Euloma – report made of unidentified related form or using admittedly obsolete nomenclature • †Euloma cordilleri • †Eumetria • †Eumetria acuticosta • †Eumetria costata • †Euphemites • †Euphemites carbonarius • †Euphemitopsis • †Euphemitopsis subpapillosa – type locality for species • †Euptychaspis • †Eurekia • †Eurytreta • †Eurytreta bisecta – or unidentified comparable form • †Eurytreta fillmorensis – type locality for species ==F==

• †Faberophyllum • †Falcatamacaris – type locality for genus • †Falcatamacaris bellua – type locality for species • †Fenestella • †Fenestella acarinata • †Fenestella crockfordae • †Fenestella dissepinodaria • †Fenestella hamithensis • †Fenestella incipiens • †Fenestella parallela • †Fenestella rarinodosa • †Fenestella regalis • †Fenestella serratula • †Fenestella tooelensis • †Fenestella trifurcata • †Fenestella utahensis • †Fenestralia • †Fenestralia sanctiludovici • †Fenestrellina • †Fistulipora • †Forteyops • †Forteyops sexapugia – type locality for species • †Fusulinella ==G==

• †Gattendorfia • †Genalaticurus • †Genalaticurus genalatus • †Genevievella'' • †Genevievella granulatus • †Girtyella – tentative report • †Girtyoceras • †Girtyoceras gordoni – type locality for species • †Girtyoceras hamiltonense • †Girtyoceras primum – type locality for species • †Girtypecten • †Girtyspira • †Girvanella • †Glabrocingulum • †Glabrocingulum coronatum • †Glabrocingulum granulosum – type locality for species • †Glabrocingulum mephitifontis – type locality for species • †Glaphyrites • †Glaphyrites nevadensis • †Globocrinus • †Globocrinus bulbus – type locality for species • †Glochinomorpha – type locality for genus • †Glochinomorpha stifeli – type locality for species • †Glosopleura • †Glossopleura • †Glossopleura boccar • †Glossopleura gigantea • †Glossopleura producta • †Glossopleura prona • †Glossopleura punctatum • †Glyphaspis • †Glyphaspis concavus – type locality for species • †Glyptospira • †Gnathodus • †Gnathodus texanus • †Gnetopsis • †Gnetopsis anglica • †Gogia'' • †Gogia granulosa • †Gogia guntheri • †Gogia kitchnerensis • †Gogia spiralis • †Goleocrinus • †Goleocrinus vadosus – type locality for species • †Goleocrinus vedosus • †Goniasma • †Goniatites • †Goniatites americanus • †Goniatites deceptus – type locality for species • †Goniatites eganensis • †Goniatites sowerbyi • †Goniophrys • †Goniophrys prima • †Goniotelena • †Goniotelena ensifer • †Goniotelina • †Goniotelina ensifer • †Goniotelina plicolabeonus – type locality for species • †Goniotelus – tentative report • †Goniotelus ludificatus • †Gonitelina • †Gothodus • †Gothodus communis • †Grammatodon • †Grammatodon politus • †Grandaurispina – or unidentified comparable form • †Grandaurispina type locality for species A – informal • †Gruntia – tentative report • †Guizhoupecten – tentative report • †Guizhoupecten tubicostata – or unidentified comparable form • †Gujocardita • †Gujocardita parviradiatus – type locality for species • †Gunterichthys – type locality for genus • †Gunterichthys lehiensis – type locality for species ==H==

• †Haimacystis • †Haimacystis rozhnovi • †Hammatocyclus • †Hammatocyclus brazerensis – type locality for species • †Hamptonia • †Hamptonia bowerbanki • †Hamptonia parva – type locality for species • †Haplistion • †Haplistion sphaericum • †Haplophrentis'' • †Haplophrentis carinatus • †Haplophrentis reesei • †Hardyoides • †Hazelia • †Hazelia palmata • †Heckethornia • †Heckethornia alticapitis – type locality for species • †Heckethornia ballionae – type locality for species • †Heckethornia bowiei – type locality for species • †Heckethornia hyndeae • †Heckethornia morrisseyi – type locality for species • †Heckethornia numani • †Heckethornia smithi – type locality for species • †Heintzella • †Heintzella whitneyi • †Helicoprion'' • †Helicospira • †Hematites • †Hematites barbarae – type locality for species • †Hematites burbankensis – type locality for species • †Hemiptychina • †Hemiptychina quadricostata • †Hemirhodon • †Hemirhodon amplipyge • †Hemitrypa • †Hemitrypa reticulata • †Hesperonomia • †Hesperonomia dinorthoides • †Hesperonomia fontinalis • †Hesperonomia frontinalis • †Hesperonomiella • †Hesperonomiella minor • †Heteralosia • †Heteropecten • †Heteropecten vanvleeti – or unidentified comparable form • †Hillyardina • †Hillyardina marginauctum • †Hillyardina semicylindrica – or unidentified comparable form • †Hindia • †Hindia sphaeroidalus • †Hintzecurus • †Hintzecurus paragenalatus • †Hintzeia • †Hintzeia aemula • †Hintzeia celsaora • †Hintzeia firmimarginis • †Hintzespongia – type locality for genus • †Hintzespongia bilamina – type locality for species • †Holcospermum • †Homagnostus • †Homalophyllites • †Hormotoma – tentative report • †Housia • †Howellella • †Hudsonospongia – tentative report • †Huronia • †Huronia vertebralis • †Hustedia • †Hustedia elongata • †Hustedia mormoni – type locality for species • †Hyattidina – tentative report • †Hyolithellus • †Hyolithes'' • †Hyolithes comptus • †Hypagnostus • †Hypagnostus parvifrons • Hyperammina • †Hyperbolochilus • †Hypselocrinus • †Hypselocrinus cavus – type locality for species • †Hypselocrinus defendus – type locality for species • †Hypselocrinus secundus • †Hypselocrinus superus – type locality for species • †Hystriculina • †Hystriculina fragilis • †Hystriculina wabashensis • †Hystricurus • †Hystricurus contractus • †Hystricurus oculilunatus • †Hystricurus robusta ==I==

• †Ianthinopsis • †Ibexella • †Ibexella multidiaphragmata • †Ibexicurus • †Ibexicurus parsonsi – type locality for species • †Iddingsia • †Idiognathodus • †Idiomesus • †Illaenurus • †Illaenus'' • †Illaenus utahensis • †Inflatia • †Inflatia bilobata • †Iphidella • †Irvingella • †Irvingella flohri – tentative report • †Irvingella major • †Ischyrotoma • †Ischyrotoma juabensis • †Ischyrotoma wahwahensis • †Isorthis • †Isoteloides • †Isoteloides flexus • †Isoteloides polaris • †Isoxyes ==J==

• †Jeffersonia • †Jenkinsonia • †Jenkinsonia varga • †Juresania • †Juresania nebraskensis ==K==

• †Kainella • †Kanoshia • †Kanoshia depressus – type locality for species • †Kanoshia kanoshensis • †Kanoshia reticulata • †Kanoshopora • †Kanoshopora droserae • †Kawina • †Kawina webbi • †Kawina wilsoni • †Kazakhoceras • †Kazakhoceras bylundi – type locality for species • †Kindbladia • †Kindbladia affinis • †Kingstonia • †Kirkella • †Kirkella fillmorensis • †Kiwetinokia • †Kiwetinokia utahensis • †Kochina • †Kochina vestita • †Kochiproductus • †Komia • †Komiella • †Komiella ostiolata • †Kootenia'' • †Kootenia acicularis • †Kootenia mendosa • †Kootenia quadriceps • †Kootenia spencei • †Kootina • †Kootina pectenoides • †Kormagnostella • †Kormagnostella advena • †Kormagnostella insolita • †Kormagnostus • †Kozlowskia • †Kozlowskia capaci – or unidentified related form • †Kutorginella • †Kutorginella lasallensis • †Kuvelousia • †Kuvelousia leptosa ==L==

• †Lachnostoma • †Lachnostoma latucelsum – type locality for species • †Lagenospermum • †Lagenospermum discissium – type locality for species • †Lamellispira • †Lavadamia • †Lavadamia joplinae – type locality for species • †Leanchoila • †Leanchoila protogonia • †Leanchoila superlata • †Leanchoilia'' • †Leanchoilia hanceyi • †Leanchoilia superlata • †Lecanospira • †Leiorhynchoidea • †Leiorhynchus • †Leiostegium • †Leiostegium formosa • †Leiostegium manitouense – or unidentified comparable form • †Leiostegium manitouensis • †Lejopyge • †Lejopyge calva • †Leperditia • †Leperditia bivia • †Lepidocarpon • †Lepidocarpon linearifolium • †Lepidodendron'' • †Lepidodendron aculeatum • †Lepidodendron obovatum • †Lepidodendron volkmannianum • †Lepidophylloides • †Lepidophyllum • †Lepidophyllum longifolium • †Lepidostrobophyllum • †Lepidostrobophyllum majus • †Lepidostrobus • †Lepidostrobus obovatus • †Lepidostrobus variabilis • †Leptaena • †Leptalosia • †Leptalosia scintilla – or unidentified comparable form • †Leptanena • †Leptomitella • †Leptomitella metta – type locality for species • †Leptomitus • †Lesuerilla – tentative report • †Licnocephala • †Licnocephala bicornuta – tentative report • †Licnocephala cavigladius • Lima • †Limapecten • Limatula • †Limipecten • †Linevitus • †Linevitus billingsi • Lingula • †Lingula carbonaria • †Lingulella'' • †Lingulella incurvata • †Lingulella pogonipensis – or unidentified comparable form • †Linipalus • †Linipalus magnispinus • †Linnarssonella • †Linnarssonia • †Linnarssonia bellatula • †Linnarssonia ophirensis • †Linoproductus • †Linoproductus meniscus • †Linoproductus ovatus • †Linoproductus planiventralis – tentative report • †Linoproductus prattenians • †Linoproductus prattenianus • †Lissocoelia • †Lissocoelia cylindrica • †Lithostrontionella • †Lithostrotionella • †Lithostrotionella americana – or unidentified comparable form • †Llanoaspis • †Lobatospongia – type locality for genus • †Lobatospongia nodensis – type locality for species • †Lochriea • †Lochriea commutata • †Lonchocephalus • †Lophophyllidium • †Lophophyllidium profundum • †Loxonema • †Loxoplocus • †Lunulazona • †Lunulazona costata • †Lunulazona nodomarginata • †Lyracystis • †Lyracystis reesei ==M==

• †Macluritella • †Maclurites • †Macronotella • †Madaraspis • †Madaraspis magnifica • †Margaretia'' • †Margaretia dorus • †Marginifera • †Marginovatia • †Marginovatia catinulus • †Mariopteris • †Mariopteris muricata • †Marjumicystis • †Marjumicystis mettae – type locality for species • †Marpolia • †Matherella • †Matthevia • †Matthevia variabilis • †Matthevia wahwahensis – type locality for species • †Meekopora • †Meekospira • †Menomonia • †Menomonia semele • †Menoparia • †Menoparia genalunata • †Metabowmania • †Metabowmania braggi – type locality for species • †Metabowmania morgani • †Metacoceras'' • †Metadimorphoceras • †Metadimorphoceras mangeri – type locality for species • †Metadimorphoceras richardsi • †Meteoaspis – tentative report • †Meteoraspis • †Michelinia • †Microcardinalia • †Micromitra • †Micromitra pannula • †Millardicurus • †Millardicurus housensis – type locality for species • †Millardicurus millardensis • †Millardicurus paramillardensis – type locality for species • †Modiolopsis • Modiolus – report made of unidentified related form or using admittedly obsolete nomenclature • †Modocia • †Modocia brevispina • †Modocia laevinucha • †Modocia typicalis • †Modocia weeksensis – type locality for species • †Mollisonia • †Mollisonia symmetrica • †Morania • †Morania fragmenta • †Mourlonia • †Mourlonia venusta – type locality for species • †Myalina ==N==

• †Nanorthis • †Nanorthis hamburgensis • †Nanorthis multicostata • †Naraoia'' • †Naraoia compacta • †Narynella • †Narynella sulcata • †Naticopis • †Naticopis altonensis – tentative report • †Naticopsis • †Natiria • †Neochonetes • †Neochonetes granulifer • †Neolenus • †Neolenus inflatus – type locality for species • †Neolenus intermedius – type locality for species • †Neolenus superbus • †Neoprioniodus • †Neoprioniodus scitulus • †Neoprioniodus varians • †Neospirifer'' • †Neospirifer cameratus • †Neospirifer kansasensis • †Neospirifer triplicatus • †Neozaphrentis – tentative report • †Nephalicephalus – type locality for genus • †Nephalicephalus beebei – type locality for species • †Nettapezoura • †Nettapezoura basilika • †Neuralethopteris • †Neuralethopteris pocahontas – or unidentified comparable form • †Neuropteris'' • †Neuropteris ampelina – type locality for species • †Neuropteris gigantea • †Neuropteris heterophylla • †Nieszkowskia – tentative report • †Niobe – tentative report • †Nisusia • †Norwoodia • †Norwoodia bellaspina • †Nothorthis • †Nuculavus • †Nuculopsis • †Nuia • †Nunnacrinus • †Nunnacrinus olsoni – type locality for species ==O==

• †Obolus • †Obolus ella • †Odontopteris • †Odontopteris osmundaeformis – or unidentified comparable form • †Odontopteris subcrenulata – or unidentified comparable form • †Odontospirifer • †Odontospirifer type locality for species A – informal • †Oepikodus • †Oepikodus quadratus • †Ogygopsis'' • †Ogygopsis typicalis • †Oistodus • †Oistodus lanceolatus • †Oistodus linguatus • †Oistodus longiramis • †Oistodus multicorrugatus – or unidentified related form • †Oistodus parallelus • †Olenellus • †Olenellus gilberti • †Olenoides • †Olenoides expansus • †Olenoides nevadensis • †Olenoides serratus • †Olenoides spencei • †Olenoides tricephalus • †Ophiacodon'' • †Ophiacodon navajovicus • †Ophileta • †Opsioryctocephalus • †Opsioryctocephalus opsis • †Orbiculoidea • †Orbiculoidea capuliformis • †Orbiculoidea missouriensis • †Orbiculoidea utahensis – type locality for species • †Orbipora • †Orbipora utahensis • †Orthambonites • †Orthambonites eucharis – or unidentified comparable form • †Orthambonites michaelis • †Orthambonites subulata • †Orthis • †Orthis subalata – or unidentified comparable form • †Orthis subulata • †Orthis swanensis • †Orthonema • †Orthonema socorroense – or unidentified comparable form • †Orthotetes • †Orthotetes kaskaskiensis • †Orthriochiton – type locality for genus • †Orthriochiton utahensis – type locality for species • †Oryctocare • †Oryctocare geikei • †Oryctocephalus • †Oryctocephalus walcotti • †Ottenbyella • †Ottenbyella ibexiana – type locality for species • †Ottoia'' • †Ottoia prolifica • †Ovatia • †Ovatia muralis • †Owenella • †Ozarkodina ==P==

• †Pachycranium • †Pachycranium faciclunis • †Pagetia'' • †Pagetia fossula – or unidentified comparable form • †Paladin • †Palaeacis • Palaeoaplysina • †Palaeoaplysina laminaeformis • †Palaeobotryllus • †Palaeoneilo • †Palaeoneilo parvaradiatus • †Palaeoscolex • †Palaeoscolex ratcliffei • †Paleococrinus • †Palmerocrinus • †Palmerocrinus profundus • †Paltodus • †Paltodus jeffersonensis • †Parabellefontia • †Parabellefontia concinna • †Parabolinoides • †Paracosmetocrinus • †Paracosmetocrinus lundi – type locality for species • †Parahystricurus • †Parahystricurus bispicatus • †Parahystricurus fraudator • †Parajuresania • †Parajuresania nebrascensis • †Parallelodon • †Parapilekia – tentative report • †Paraplethopeltis • †Paraplethopeltis genacurvus • †Paraplethopeltis genarectus • †Parkaspis • †Parkaspis drumensis • †Peelerophon – tentative report • †Pelagiella • †Peniculauris • †Peniculauris bassi • †Peniculauris ivesi • †Penniretepora • †Pentameroides • †Pentamerus • †Pericyclus • †Permophorus • †Permophorus albequus • †Permophorus occidentalis • , until recently known as Peronopsis interstricta †Peronopsis'' • †Peronopsis acadica • †Peronopsis amplaxis • †Peronopsis bonnerensis • †Peronopsis brighamensis • †Peronopsis fallax • †Peronopsis interstricata • †Peronopsis interstricta • †Peronopsis montis • †Peronopsis scutalis • †Peronopsis segmenta • †Peronopsis sermenta • †Perspicaris • †Perspicaris ellipsopelta • †Petasmatherus • †Petasmatherus type locality for species A – informal • †Petigurus • †Petigurus inexpectatus • †Pharkidonotus • †Pharkidonotus percarinatus • †Phillipsia • †Phosphannulus • †Phrenophoria • †Phrenophoria type locality for species A – informal • †Phricodothyris • †Phyllograptus • †Pilekia • †Pilekia trio – tentative report • Pinna – report made of unidentified related form or using admittedly obsolete nomenclature • †Plagioglypta • †Platycrinites • †Platycrinus • †Platycrinus graphicus – or unidentified comparable form • †Platyhystrix'' – or unidentified comparable form • †Platyhystrix rugosus • †Platyworthenia • †Plectelasma • †Plectelasma type locality for species A – informal • †Plectelasma type locality for species B – informal • †Plethospira • †Pleurosiphonella • †Pleurosiphonella virginica • †Pliomerops • †Pliomerops insolita • †Polidevcia • †Polidevcia bellistriata • †Polidevcia obesa • †Politicurus • †Politicurus politus • †Polypora • †Polypora cestriensis • †Polypora debilis • †Polypora micronodosa • †Polypora stansburyensis • †Ponticulocarpus – type locality for genus • †Ponticulocarpus robisoni – type locality for species • †Praedaraelites • †Praedaraelites loeblichi • †Prehousia • †Prehousia alata • †Prehousia diverta • †Presbynileus • †Presbynileus elongatus • †Presbynileus ibexensis • †Presbynileus utahensis • †Probolionia • †Prodentalium • †Prodentalium canna • †Productella • †Productus – report made of unidentified related form or using admittedly obsolete nomenclature • †Proehmaniella • †Proehmaniella basilica • †Prohedinia • †Prohedinia spencei • †Prolecanites – tentative report • †Prolecanites lyoni • †Prosaukia • †Protoblechnum • †Protoblechnum bradyi – type locality for species • †Protopliomerella • †Protopliomerella contracta • †Protopliomerops • †Protopliomerops quattuor – type locality for species • †Protopresbynileus • †Protopresbynileus willdeni • †Protoretepora • †Protospongia • †Protospongia elongata • †Prototreta • †Protowentzelella • †Protowentzelella cystosa • †Psalikilus • †Psalikilus likum • †Psalikilus paraspinosum • †Psalikilus spinosum • †Psalikilus typicum • †Psephosthenaspis • †Psephosthenaspis glabrior • †Psephosthenaspis microspinosa • †Psephosthenaspis pseudobathyurus • †Pseudagnostus • †Pseudoarctolepis • †Pseudoarctolepis sharpi • †Pseudoarctolepsis • †Pseudoarctolepsis sharpi • †Pseudoclelandia • †Pseudoclelandia fluxafissura – or unidentified related form • †Pseudocybele • †Pseudocybele altinasuta • †Pseudocybele lemurei • †Pseudocybele nasuta – type locality for species • †Pseudodoriodotis • †Pseudohystricurus • †Pseudokainella – tentative report • †Pseudokainella armatus • †Pseudomera • †Pseudomera arachnopyge • †Pseudomera barrandei – or unidentified comparable form • †Pseudomera insolita • †Pseudomonotis • †Pseudomonotis equistriata • †Pseudomphalotrochus • †Pseudomphalotrochus incrustatus • †Pseudoolenoides • †Pseudoolenoides acicaudus • †Pseudoolenoides aspinosus • †Pseudoolenoides dilectus • †Pseudopermophorus • †Pseudopermophorus annettae • †Pseudoperonopsis • †Pseudorthoceras • †Pseudosaratogia – tentative report • †Pseudoschwagerina • †Pterocephalia • †Pteronites • †Ptychagnostus • †Ptychagnostus aculeatus • †Ptychagnostus atavus'' • †Ptychagnostus cassis • †Ptychagnostus germanus • †Ptychagnostus intermedius • †Ptychagnostus occultatus • †Ptychagnostus punctuosus • †Ptychagnostus richmondensis • †Ptychagnostus seminula • †Ptychomphalus • †Ptychoparella • †Ptylopora • †Ptylopora condrai • †Ptylopora eliasi • †Ptyocephalus • †Ptyocephalus accliva • †Ptyocephalus declevita – type locality for species • †Ptyocephalus declivita • †Ptyocephalus versini • †Ptyocephalus vigilans • †Pugnax • †Pugnax utah – type locality for species • †Pugnoides • †Punctospirifer • †Punctospirifer campestris • †Punctospirifer kentuckensis • †Punka • †Punka nitida – or unidentified comparable form ==Q==

• †Quadratia • †Quadrisonia – tentative report • †Quadrisonia lavadamensis • †Quadrochonetes • †Quadrochonetes type locality for species A – informal ==R==

• †Ramiporalia • †Raphistoma – tentative report • †Raphistomina • †Ratcliffespongia – type locality for genus • †Ratcliffespongia perforata – type locality for species • †Ratcliffespongia sheeleri • †Ratcliffespongia wheeleri – type locality for species • †Rayonnoceras • †Rayonnoceras solidiorme • †Receptaculites'' • †Receptaculites elongatus • †Receptaculites mammilaris • †Receptaculites mammillaris • †Rectifenestella • †Rectifenestella tenax • †Regispongia • †Regispongia contorta • †Remopleuridiella • †Remopleuridiella angularis – type locality for species • †Remopleuridiella caudalimbata • †Reticulatia • †Reticulatia americana • †Retispira • †Retispira cincta – type locality for species • †Retispira textilis – or unidentified comparable form • †Rhabdomeson • †Rhabdomeson artum • †Rhipidomella • †Rhipidomella missouriensis • land snail †Rhodea'' • †Rhodea vespertina • †Rhombopora • †Rhombopora tenuirama • †Rhynchopora • †Ribeiria • †Ribeiria lucan • †Rigbyocarpus – type locality for genus • †Rigbyocarpus ebracteatus – type locality for species • †Rodea • †Rodea vespertina – or unidentified comparable form • †Rossaspis • †Rossaspis superciliosa • †Rossicurus • †Rossicurus lepidus • †Rugatia • †Rugatia occidentalis • †Rugosochonetes • †Rugosochonetes loganensis • †Rusophycus'' • †Rylstonia – tentative report ==S==

• †Saffordotaxis • †Sanguinolites • †Sanguinolites elongatus – type locality for species • †Saukia • †Saukiella'' • †Scandodus • †Scandodus furnishi • †Scaphellina – tentative report • †Scenella • †Scenella radians • †Schizambon • †Schizambon obtusus – type locality for species • †Schizodus • †Schizodus bifidus • †Schizodus subovatus – type locality for species • †Schizophoria • †Schmalenseeia • †Schuchertella • †Schuchertella lens • †Schwagerina • †Scolicia • †Scolopodus • †Scolopodus gracilis • †Scolopodus pseudoquadratus • †Scolopodus quadraplicatus • †Scolopodus rex • †Seelyia • †Selenocoryphe – type locality for genus • †Selenocoryphe platyura – type locality for species • †Selkirkia'' • †Selkirkia columbia – or unidentified comparable form • †Selkirkia spencei • †Selkirkia willoughby • †Sentinelia – tentative report • †Sentinelia draco – or unidentified comparable form • †Septimyalina • †Septimyalina burmai – tentative report • †Septopora • †Septopora ulrichi • †Shoshonorthis • †Shoshonorthis michaelis • †Shoshonorthis swanensis • †Shumardia • †Shumardia exopthalmus • †Sidneyia'' • †Sigillaria • †Sigillaria brardii • †Sinuella – tentative report • †Siphonobolus – tentative report • †Spathognathus • †Spathognathus cristulus • †Spathognathus scitulus • †Spencella • †Spencella utahensa – type locality for species • †Spencella utahensis • Sphenacodon'' • †Sphenacodon ferocior – or unidentified comparable form • †Sphenophyllostachys – tentative report • †Sphenophyllum • †Sphenophyllum angustifolium • †Sphenophyllum verticillatum • †Sphenopteridium • †Sphenopteridium dissectum • †Sphenopteridium zaitzeffii – type locality for species • †Sphenopteris • †Sphenopteris diphlebia – type locality for species • †Sphenosteges • †Sphenosteges hispidus • †Spinilingula • †Spinilingula prisca – type locality for species • †Spinofacia – type locality for genus • †Spinofacia pectinatus – type locality for species • †Spirifer'' • †Spirifer centronatus • †Spirifer opimus • †Spirifer rockymountanus • †Spiriferina • †Spirinella • †Spirinella pauciplicata • Spirorbis • †Squamaria • †Squamularia – report made of unidentified related form or using admittedly obsolete nomenclature • †Stenolobulites • †Stenolobulites simulator • †Stenolobulites sinuosus • †Stenopora • †Stenopora confusionensis • †Stenoporella • †Stenoporella mineriensis • †Stenorhachis – tentative report • †Stenorhachis genalticurvatus • †Stibaraster – type locality for genus • †Stibaraster ratcliffei – type locality for species • rhizome system †Stigmaria'' • †Stigmaria ficoides • †Stigmariopsis • †Stigmariopsis anglica • †Stolodus – or unidentified related form • †Stolodus stola • †Straparollus • †Streblochondria • †Strebloplax • †Strebloplax pertusa • †Streblopteria • †Streblopteria montpelierensis • †Streblotrypa • †Streblotrypa angulatum • †Streptelasma • †Striatifera • †Striatifera brazeriana • †Strigambitus • †Strigambitus utahensis • †Strobeus – or unidentified related form • †Sulcoretepora • †Supaia • †Supaia rigida • †Symphysurina • †Symphysurina cleora – or unidentified comparable form • †Symphysurina globocapitella • †Symphysurina illaenoides • †Symphysurina spicata – or unidentified comparable form • †Symphysurina uncaspicata • †Symphysurina walcotti • †Symphysurus – tentative report • †Synarmocrinus • †Synarmocrinus depressus – type locality for species • †Syntrophina • †Syntrophina campbelli – or unidentified comparable form • †Syntrophina carinifera • †Syntrophopsis • †Syntrophopsis polita • †Syntrophopsis transversa • †Syringopora'' • †Syringopora aculeata • †Syringopora surcularia • †Syringothyris • †Syringothyris textus ==T==

• †Tabulipora • †Tabulipora atacta • †Tabulipora carbonaria • †Tabulipora ricta • †Tabulipora sarcinula • †Tabulipora stragula • †Taeniopteris • †Talpaspongia • †Talpaspongia clavata • †Teichichnus'' – tentative report • †Telangium • †Telangium affine • †Terranovella • †Tesselacauda • †Tesselacauda depressa – or unidentified comparable form • †Testiispongia – type locality for genus • †Testiispongia venula – type locality for species • †Testispongia • †Testispongia venula • †Tetragraptus • †Tetragraptus quadribrachiatus – or unidentified comparable form • †Thalassinoides'' – tentative report • †Thamniscus • †Thamniscus raribifurcatus • †Thamnosia – or unidentified comparable form • †Thamnosia arctica – tentative report • †Timania • †Timaniella • †Timaniella pseudocamerata • †Tingia • †Tingia placida – type locality for species • †Tomagnostella • †Tomagnostella exsculpta • †Tonkinella • †Tonkinella breviceps • †Tonkinella valida • †Torynifer • †Totiglobus – tentative report • †Totiglobus lloydi • †Trace • †Trace fossil • †Trachycheilus • †Trachycheilus granulosus • †Trachycheilus whirlwindensis • †Trematorthis – tentative report • †Tricitictes • †Tricrepicephalus • †Tricrepicephalus teres • †Trigonocarpus • †Trigonocarpus noeggerathii • †Trigonocerca • †Trigonocerca typica • †Trigonocercella • †Trigonocercella acuta • †Trinodus'' • †Triplagnostus • †Triplagnostus gibbus • †Triplophylites • †Triplophylites compressus • †Triplophylites ellipticus • †Triplophylites subcrassus • †Triticites • †Tritoechia • †Tritoechia loganensis • †Tritoechia sinuata • †Trocholites • †Trochophyllum – tentative report • †Trymataspis • †Trymataspis depressa • †Tseajaia'' • †Tseajaia campi – type locality for species • †Tulepyge • †Tulepyge tulensis – type locality for species • †Tumicephalus • †Tumicephalus depressus • †Tuzoia • †Tuzoia argenta • †Tuzoia guntheri • †Tuzoia retifera • †Tympanuella • †Tympanuella transversa ==U==