List of the Mesozoic life of Utah

• †Abrekopsis • †Abrekopsis depresispirus – type locality for species • †Abydosaurus – type locality for genus • †Abydosaurus mcintoshi – type locality for species • †Aclistochara • †Aclistochara bransoni • †Acristavus'' • †Acristavus gagslarsoni • †Adelodelphys • †Adelodelphys muizoni • †Adelolophus – type locality for genus • †Adelolophus hutchisoni – type locality for species • †Admetopsis • †Adocus • †Aenigmadelphys • †Aenigmadelphys archeri – type locality for species • , with an anachronistic human to scale †Alamosaurus'' • †Alamosaurus sanjuanensis • †Albanerpeton • †Albanerpeton cifellii – type locality for species • †Albanerpeton galaktion • †Albanerpeton gracilis • †Albanerpeton nexuosus • †Allocrioceras • †Allocrioceras annulatum • †Allosaurus'' • †Allosaurus fragilis • †Allosaurus jimmadseni – type locality for species • †Alphadon • †Alphadon attaragos • †Alphadon eatoni – type locality for species • †Alphadon halleyi • †Alphadon marshi – or unidentified comparable form • †Alphadon sahnii • †Alzadites • †Alzadites incomptus • †Amberleya – tentative report • †Amblotherium • †Amblotherium gracilis • †Ameribaatar – type locality for genus • †Ameribaatar zofiae – type locality for species • †Ameribataar • †Ameribataar zofiae • Amia • †Ampezzopleura • †Ampezzopleura rugosa – type locality for species • †Amplovalvata • †Anaflemingites • †Anaflemingites silberlingi – or unidentified related form • †Anasibirites • †Anasibirites angulosus • †Anasibirites bastini • †Anasibirites hircinus • †Anasibirites kingianus • †Anasibirites mojsisovicsi • †Anasibirites multiformis • †Anasibirites tenuistriatus • †Anawasatchites • †Anchisauripus • †Anchisauripus sillimani • †Anchistodelphys – type locality for genus • †Anchistodelphys archibaldi – type locality for species • †Anchistodelphys delicatus – type locality for species • †Anchura • †Anemia • †Anemia dakotensis • †Anemia dicksoniana • †Anemia fremontii • †Animantarx'' – type locality for genus • †Animantarx ramaljonesi – type locality for species • †Anisomyon • Anomia • †Anomoepus • †Apatopus • †Apatopus lineatus • †Apatosaurus • †Apatosaurus louisae – type locality for species • †Apistodon – report made of unidentified related form or using admittedly obsolete nomenclature • †Apistodon exiguus – or unidentified related form • †Aquiladelphis – tentative report • †Aquiladelphis laurae – type locality for species • †Araeodon • †Araeodon intermissus • †Araucariacites • †Araucariacites australis • †Araucariacites fissus • †Araucarioxylon'' • †Arcomya • †Arctoceras • †Arctoceras tuberculatum • †Arctoprionites • †Arctoprionites resseri • †Arvinachelys – type locality for genus • †Arvinachelys goldeni – type locality for species • †Aspenites • †Aspenites acutus • Astarte • †Astarte livingstonensis • †Astarte meeki • Asteriacites'' • †Asteriacites lumbricalis • †Astralopteris • †Astralopteris coloradica • †Astroconodon • †Astroconodon delicatus – type locality for species • †Atreipus • †Atreipus milfordensis • †Athenar – type locality for genus • †Athenar bermani – type locality for species • †Aublysodon – tentative report • †Aucellina • †Austrotindaria • †Austrotindaria canalensis • †Austrotindaria svalbardensis • †Avitotherium – type locality for genus • †Avitotherium utahensis – type locality for species ==B==

• †Baena • †Baibisha – or unidentified comparable form • †Bajarunia • †Bajarunia confusionensis – type locality for species • †Bakevellia • †Bakevellia costata • †Bakevellia costatus – or unidentified comparable form • †Bakevellia exporrecta • †Bakevellia silberlingi – type locality for species • †Barosaurus'' • †Barosaurus lentus • †Basilemys • †Batrachopus • †Battenizyga • †Battenizyga eotriassica – type locality for species • †Bernissartia • †Bicuspidon – type locality for genus • †Bicuspidon numerosus – type locality for species • †Bicuspidon smikros – type locality for species • †Borissiakoceras • †Bothriagenys – type locality for genus • †Bothriagenys mysterion – type locality for species • hunting a hesperornithiform bird †Brachauchenius'' • †Brachauchenius lucasi • †Brachiosaurus • †Brachychirotherium • †Brachychirotherium thuringiacum • †Brachyphyllum • †Brachyphyllum crassicaule • †Brasilichnium • †Brontomerus – type locality for genus • †Brontomerus mcintoshi – type locality for species • †Brontopodus • †Brontosaurus'' • †Brontosaurus parvus • †Brownichnus • †Brownichnus favosites – type locality for species • †Bryceomys • †Bryceomys fumosus – type locality for species • †Bryceomys hadrosus • †Bryceomys intermedius – type locality for species ==C==

• †Callialasporites • †Callialasporites segmentatus • †Callialasporites turbatus • Callistina • †Callistina alta – or unidentified related form • †Calycoceras • †Calycoceras naviculare • †Camarasaurus'' – type locality for genus • †Camarasaurus lentus – type locality for species • Campeloma • †Camptonectes • †Camptonectes platessiformis • †Camptonectes stygius • †Camptosaurus • †Camptosaurus dispar • †Cantioscyllium – or unidentified comparable form • †Carmelopodus – type locality for genus • †Carmelopodus untermannorum – type locality for species • †Carycorbula • †Carycorbula nematophora • †Cassiope • †Cassiope utahensis • †Cedaromys • †Cedaromys bestia – type locality for species • †Cedaromys hutchisoni – or unidentified comparable form • †Cedaromys minimus – type locality for species • †Cedaromys parvus – type locality for species • †Cedarosaurus – type locality for genus • †Cedarosaurus weiskopfae – type locality for species • †Cedarpelta – type locality for genus • †Cedarpelta bilbeyhallorum – type locality for species • †Cedrorestes – type locality for genus • †Cedrorestes crichtoni – type locality for species • †Cedroxylon • †Ceratodus • †Ceratosaurus'' • †Ceratosaurus nasicornis • †Ceratosaurus dentisulcatus – type locality for species • †Cercomya • †Cercomya punctata • †Cerebropollenites • †Cerebropollenites macroverruesus • Cerithiopsis • †Chamops • †Chamops segnis • †Characichnos • †Chartronella • †Chartronella pagina – type locality for species • †Chartronella unicostata – type locality for species • †Chinlea'' – type locality for genus • †Chinlea sorenseni – type locality for species • †Chirotherium • †Chirotherium rex – or unidentified comparable form • Chlamys • †Chondrites • †Churkites • †Churkites noblei • †Cimexomys • †Cimexomys antiquus – or unidentified comparable form • †Cimexomys gregoryi – type locality for species • †Cimolodon • †Cimolodon electus • †Cimolodon nitidus – or unidentified comparable form • †Cimolodon similis • †Cimolodon wardi – type locality for species • †Cimolomys'' • †Cimolomys clarki • †Cimolomys milliensis – type locality for species • †Cionichthys – type locality for genus • †Cionichthys dunklei – type locality for species • Cladophlebis • †Cladophlebis constricta • †Cladophlebis parva • †Claraia • †Cnodontosaurus – type locality for genus • †Cnodontosaurus suchockii – type locality for species • †Coelophysis – tentative report • †Coelostylina • †Coelostylina angulifera – or unidentified comparable form • †Coelostylina costata – type locality for species • †Coelostylina virginensis – type locality for species • †Coelurus'' • †Coelurus fragilis • †Compsemys • †Confusionella • †Confusionella loczyi • †Coniophis • †Coniopteris • †Coniopteris hymenophylloides • †Contogenys • †Contogenys sloani – or unidentified comparable form • Corbula • †Cordillerites • †Cordillerites compressus • †Corviconodon • †Corviconodon utahensis – type locality for species • Cossmannea • †Cossmannea imayi • †Cossmannea imlayi • †Cossmannea kanabensis • †Costatoria • †Cowboyiceras – type locality for genus • †Cowboyiceras farwestense – type locality for species • †Cretorectolobus • †Crittendenia • †Ctenacodon • †Cteniogenys • †Ctenostreon • †Ctenostreon gikshanensis – or unidentified comparable form • Cucullaea • †Cucullaea haguei • †Culicolestes – type locality for genus • †Culicolestes kielanae – type locality for species • †Cycadeoidea'' • †Cycadeoidea cleavelandii • †Cycadeoidea medullara • Cylichna • †Cylindrobullina • †Cylindrobullina convexa – type locality for species • †Cymbophora • †Cynepteris • †Cynepteris lasiophora • †Cypellospongia – type locality for genus • †Cypellospongia fimbriartis – type locality for species • †Czekanowskia • †Czekanowskia turneri – type locality for species ==D==

• †Dakotadens – type locality for genus • †Dakotadens morrowi – type locality for species • †Dakotadens pertritus – type locality for species • †Dakotamys • †Dakotamys malcolmi – type locality for species • †Dakotaseps – type locality for genus • †Dakotaseps gillettorum – type locality for species • †Dakotasuchus • †Dakotasuchus kingi • †Deinonychus • †Deinosuchus • †Deinosuchus hatcheri • †Denazinemys • †Denazinemys nodosa • Dentalium • †Dentalium sublineatum – or unidentified related form • †Diabloceratops'' – type locality for genus • †Diabloceratops eatoni – type locality for species • †Dicothodon – type locality for genus • †Dicothodon cifelli • †Dicothodon cifellii – type locality for species • †Dicothodon moorensis – type locality for species • †Dieneroceras • †Dieneroceras dieneri • †Dimekodontosaurus – type locality for genus • †Dimekodontosaurus madseni – type locality for species • †Dinehichnus – type locality for genus • †Dinehichnus socialis – type locality for species • †Dinochelys – type locality for genus • †Dinochelys whitei – type locality for species • †Dinophyton • †Dinophyton spinosus • †Dinosauropodes – type locality for genus • †Dinosauropodes bransfordii • †Dinosauropodes magrawii – type locality for species • †Dinosauropodes osborni • †Dinosauropodes wilsoni • †Diplochilus – tentative report • †Diplodocus'' • †Diplodocus hallorum • †Diplodocus longus • Discinisca – report made of unidentified related form or using admittedly obsolete nomenclature • †Docodon • †Doswellia • †Drepanocheilus • †Drepanocheilus ruidium • †Dryolestes • †Dryolestes priscus • †Dryosaurus • †Dryosaurus elderae – type locality for species • †Dystrophaeus – type locality for genus • †Dystrophaeus viaemalae – type locality for species ==E==

• †Elegantinia • Elliptio • , or the "saber-toothed herring" †Enchodus'' • †Enneabatrachus • †Entalophora • †Entalophora stokesi • †Entolioides • †Entolium • †Entradasuchus – type locality for genus • †Entradasuchus spinosus – type locality for species • †Eoalphadon • †Eoalphadon clemensi – type locality for species • †Eoalphadon lillegraveni – type locality for species • †Eoalphadon woodburnei – type locality for species • †Eocephalites • †Eocephalites primus • †Eodelphis • †Eoginkgoites • †Eolambia'' – type locality for genus • †Eolambia caroljonesa – type locality for species • †Eopolycotylus – type locality for genus • †Eopolycotylus rankini – type locality for species • †Equisetites • †Equisetum • †Equisetum burchardtii • †Equisetum UD006 – informal • †Eryma • †Eryma jungostrix • †Eucalyptus • †Eucalyptus dakotensis • †Eumorphotis • †Eumorphotis beneckei – or unidentified comparable form • †Eumorphotis ericius – type locality for species • †Eumorphotis hinnitidea • †Eumorphotis multiformis • †Eumorphotis venetiana • †Eumorphotis virginensis – type locality for species • †Eunaticina • †Eunaticina textilis • †Euomphaloceras • †Euspira • †Euspira concinna • †Euthlastus • †Euthlastus cordiformis • †Eutretauranosuchus • †Evazoum • †Exesipollenites • †Exesipollenites tumulosus • †Exogyra'' • †Exogyra acroumbonata • †Exogyra levis • †Exostinus – or unidentified comparable form ==F==

• †Fabrosaurus – tentative report • †Falcarius'' – type locality for genus • †Falcarius utahensis – type locality for species • Ficus • †Ficus daphnogenoides • †Flemingites • †Fona – type locality for genus • †Fona herzogae – type locality for species • †Frenelopsis • †Frenelopsis varians • †Frenelopsis variens ==G==

• †Gastonia'' – type locality for genus • †Gastonia burgei – type locality for species • †Gastonia lorriemcwhinneyae – type locality for species • †Geltena • †Geminiraptor • †Geminiraptor suarezarum • †Germanonautilus – tentative report • †Gervillaria • †Gervillaria montanaensis • †Gervillia • Gleichenia • †Gleichenia comptoniaefolia • †Gleichenia delicatula • †Glirodon – type locality for genus • †Glirodon grandis – type locality for species • Globularia – tentative report • †Glyptops • †Glyptops plicatulus – type locality for species • †Gondolella • †Gondolella planata • †Goniobasis – tentative report • †Goniobasis subtortuosa • †Goniodiscus • †Goniodiscus smithi • †Goniomya • †Goniomya montanaensis • †Goniopholis'' • †Grallator • †Grallator cursorius • †Grammatodon • †Grammatodon haguei • †Gryphaea • †Gryphaea planoconvexa • †Gryphaeostrea • †Gryposaurus'' • †Gryposaurus monumentensis – type locality for species • †Guodunites • †Guodunites hooveri • †Gwyneddichnium • †Gypsonictops ==H==

• †Hagryphus'' – type locality for genus • †Hagryphus giganteus – type locality for species • †Hamulus – tentative report • †Hamulus subquadratus • †Hanielites • †Harmodontosaurus – type locality for genus • †Harmodontosaurus emeryensis – type locality for species • †Hausmania • †Hausmania rigida • †Hedenstroemia • †Hedenstroemia kossmati • Hemiaster • †Hemiaster humphreysanus • †Hemicalypterus – type locality for genus • †Hemicalypterus weiri – type locality for species • †Heminajas – tentative report • †Heminajas balatonis – or unidentified comparable form • †Hemiprionites • †Hemiprionites typus • †Hippodraco'' – type locality for genus • †Hippodraco scutodens – type locality for species • †Hispanosauropus • †Hoernesia • †Holocrinus • †Holocrinus dubius – tentative report • †Holocrinus smithi • †Homalopoma • †Homalopoma sinbadensis – type locality for species • †Homomya • †Hoplitosaurus – or unidentified comparable form • †Hoplosuchus – type locality for genus • †Hoplosuchus kayi – type locality for species • †Hybodus'' • †Hyporosopora • †Hyporosopora nielsoni – type locality for species ==I==

• †Iani – type locality for genus • †Iani smithi – type locality for species • †Icacinoxylon • †Icacinoxylon pittiense – type locality for species • †Idahocolumbites • †Idahocolumbites cheneyi • †Iguanacolossus'' – type locality for genus • †Iguanacolossus fortis – type locality for species • †Iguanodon • †Iguanodon ottingeri – type locality for species • Ilex • †Ilex serrata • with a human indicating its size †Inoceramus'' • †Inoceramus albertensis – or unidentified comparable form • †Inoceramus flavus • †Inoceramus gilberti • †Inoceramus koeneni • †Inoceramus pictus • †Inoceramus tenuistriatus – tentative report • †Inoceramus undabundus • †Inyoites • †Inyoites beaverensis – type locality for species • †Inyoites oweni • †Iqualadelphis • †Iqualadelphis lactea • †Iridotriton – type locality for genus • †Iridotriton hechti – type locality for species • †Ischyrhiza – or unidentified comparable form • Isocrinus • †Isocrinus nicoleti • Isognomon'' • †Isognomon perplana – or unidentified comparable form • †Iugomortiferum – type locality for genus • †Iugomortiferum thoringtoni – type locality for species ==J==

• †Janumys – type locality for genus • †Janumys erebos – type locality for species • †Janumys erebros • †Jeanbesseiceras • †Jeanbesseiceras jacksoni • †Jugulator • †Jugulator amplissimus • †Juvenites • †Juvenites spathi – or unidentified related form • †Juvenites thermarum – or unidentified comparable form ==K==

• †Kallirhynchia'' • †Kallirhynchia myrina – type locality for species • †Kamerunoceras • †Kashmirites • †Kashmirites confusionensis • †Kashmirites meeki • †Kashmirites nivalis • †Kashmirites perrini • †Kashmirites seerleyi • †Kashmirites stepheni – type locality for species • †Kashmirites subarmatus • †Kashmirites utahensis – type locality for species • †Kayentapus • †Kokopellia – type locality for genus • †Kokopellia juddi – type locality for species • †Koparion – type locality for genus • †Koparion douglassi – type locality for species • †Koreanaornis • †Koreanaornis hamanensis – or unidentified comparable form • †Kosmoceratops'' – type locality for genus • †Kosmoceratops richardsoni – type locality for species • †Kouphichnium ==L==

• †Ladinaticella • †Ladinaticella striatocostata • †Lanceolites • †Lanceolites bicarinatus • †Lanceolites compactus • †Lasalichthys – type locality for genus • †Lasalichthys hillsi – type locality for species • †Latochara • †Latochara latitruncata • †Laubopsis – tentative report • †Legumen • †Leidyosuchus'' • †Lenticidaris – type locality for genus • †Lenticidaris utahensis – type locality for species • †Lepidotes • †Lepidotes walcotti – type locality for species • Lepisosteus • †Leptalestes • †Leptochamops • †Leptochamops denticulatus • †Leptochondria • †Leptochondria curtocardinalis • †Leptochondria nuetzeli – type locality for species • †Leptochondria occidanea – type locality for species • †Leptochondria xijinwulanensis • Lima • †Lingularia • †Lingularia borealis • †Liopistha • †Liopistha meeki • †Liostrea • †Liostrea strigilecula • †Liriophyllum • †Liriophyllum UD012 – informal • †Lissodus • †Litakis • †Litakis gilmorei • †Lonchidion • Lopha • †Lopha engelmanni – or unidentified related form • Lucina • †Lyosoma • †Lyosoma enoda • †Lyosoma powelli • †Lythronax'' – type locality for genus • †Lythronax argestes – type locality for species ==M==

• †Machairoceratops'' – type locality for genus • †Machairoceratops cronusi – type locality for species • †Macroelongatoolithus • †Macroelongatoolithus carlylei – type locality for species • †Mactromya – tentative report • †Magadiceramus • †Magadiceramus crenelatus • †Magadiceramus crenistriatus • †Magadiceramus soukupi • Magnolia • †Magnolia boulayana • †Mammites • †Mammites nodosoides • †Marshosaurus'' – type locality for genus • †Marshosaurus bicentesimus – type locality for species • †Martharaptor – type locality for genus • †Martharaptor greenriverensis – type locality for species • †Matonidium • †Matonidium brownii • †Matonidium lancipinnulum • †Meekoceras • †Meekoceras davisi • †Meekoceras gracilitatis • †Meekoceras millardense – type locality for species • †Meekoceras olivieri – type locality for species • †Megalosauripus • †Megasphaeroceras • †Megasphaeroceras rotundum – or unidentified comparable form • †Melvius • †Melvius chauliodous – or unidentified comparable form • †Meniscoessus'' • †Meniscoessus intermedius • †Meniscognathus • †Meniscognathus altmani – or unidentified comparable form • †Meniscognathus molybrochoros – type locality for species • †Mesembrioxylon • †Mesembrioxylon stokesi • †Mesembrioxylon stokesii • †Mesembryoxylon • †Mesodma • †Mesodma formosa – or unidentified comparable form • †Mesodma hensleighi – or unidentified comparable form • †Mesodma minor – or unidentified comparable form • †Mesodma thompsoni – or unidentified comparable form • †Mesostoma • †Metoicoceras • †Metoicoceras geslinianum • †Microcachrydites • †Microconchus • †Microconchus utahensis • †Microeciella • †Microeciella duoflavina • †Microeciella pollostos – type locality for species • †Minersvillites – type locality for genus • †Minersvillites farai – type locality for species • †Miocidaris • †Miocidaris utahensis • †Moabosaurus'' – type locality for genus • †Moabosaurus utahensis – type locality for species • Modiolus • †Modiolus isonemus • †Modiolus subimbricatus • †Monanthesia • †Monocnemodon – type locality for genus • †Monocnemodon syphakos – type locality for species • †Moros – type locality for genus • †Moros intrepidus – type locality for species • †Myalina • †Myledaphus • †Myledaphus bipartitus • †Myoconcha • †Myoconcha plana – or unidentified comparable form • †Myopholas • †Myopholas hardyi • †Myophorella'' • †Myophorella livinigstonensis • †Myophorella monatanaensis • †Myophorella yellowstonensis • †Myophoria • †Mytiloides • †Mytiloides submytiloides – or unidentified related form • †Mytilus • †Mytilus whitei – or unidentified comparable form ==N==

• †Naomichelys • †Nasutoceratops'' – type locality for genus • †Nasutoceratops titusi – type locality for species • †Naticopsis • †Naticopsis depressispira • †Naticopsis fenestravella – type locality for species • †Naticopsis utahensis – type locality for species • †Natiria • †Natiria aequicostata – type locality for species • †Natiria costata – or unidentified comparable form • †Nedcolbertia – type locality for genus • †Nedcolbertia justinhoffmanni – type locality for species • †Nemodon • †Neocardioceras • †Neocardioceras juddii • †Neocrioceras • †Neoschizodus • †Neoschizodus laevigatus • †Neoschizodus orbicularis – or unidentified comparable form • †Neoschizodus praeorbicularis • †Neoschizodus thaynesianus – type locality for species • †Neridomus – tentative report • †Nerinea'' – tentative report • †Neritaria • †Neritaria costata – type locality for species • Neritina • †Neritina phaseolaris • †Neurankylus • †Nezpercius • †Nezpercius dodsoni • †Nilsonia • †Nilsonia lewisii – type locality for species • †Nilssoniopteris • †Nododelphinula – tentative report • †Normannites – tentative report • †Normannites crickmayi – or unidentified related form • †Nothronychus'' • †Nothronychus graffami – type locality for species • Nucula • Nuculana • †Nuculana mutuata – or unidentified comparable form • †Nymphalucina • †Nymphalucina linearia – or unidentified related form ==O==

• †Obnixia – type locality for genus • †Obnixia thaynesiana • †Odaxosaurus • †Odaxosaurus piger – or unidentified comparable form • †Odaxosaurus priscus • †Odaxosaurus roosevelti – type locality for species • †Omphaloptycha • †Omphaloptycha hormolira – type locality for species • †Omphaloptychia • †Omphaloptychia laevisphaera – type locality for species • Oncousoecia – tentative report • †Ooliticia – tentative report • †Ophioglypha • †Ophioglypha utahensis – type locality for species • †Opisthias • †Ornithomimus • †Osteocallis • †Osteocallis mandibulus • Ostrea • †Ostrea occidentalis • †Ostrea strigulecula • †Othnielosaurus'' • †Othnielosaurus consors • †Otozoum • †Ovaloolithus • †Ovaloolithus tenuisus – type locality for species • †Ovaloolithus utahensis – type locality for species • †Owenites • †Owenites carpenteri • †Owenites koeneni ==P==

• †Pachyomphalus • †Pachyomphalus americanus – type locality for species • †Pagiophyllum'' • †Paiutemys – type locality for genus • †Paiutemys tibert – type locality for species • †Palaeophycus – or unidentified comparable form • †Palaeopiceoxylon • †Palaeopiceoxylon thinosu • †Palaeopiceoxylon thinosus • †Palaeoscincosaurus • †Palaeoscincosaurus pharkidodon – type locality for species • †Paleoaster • †Paleoaster inquirenda • †Palmulasaurus – type locality for genus • †Palmulasaurus quadratus – type locality for species • †Parachondroceras • †Parachondroceras andrewsi • †Parachondroceras filicostatum – or unidentified comparable form • †Paracimexomys • †Paracimexomys judithae – or unidentified comparable form • †Paracimexomys magnus • †Paracimexomys perplexus – type locality for species • †Paracimexomys priscus – or unidentified comparable form • †Paracimexomys robisoni – type locality for species • †Paraglyphanodon – type locality for genus • †Paraglyphanodon gazini – type locality for species • †Paraglyphanodon utahensis – type locality for species • †Parallelodon – tentative report • †Parallelodon beyrichii – or unidentified related form • †Paramacellodus • †Paramacellodus oweni – or unidentified comparable form • †Paranyctoides • †Paraphyllanthoxylon • †Paraphyllanthoxylon utahense • †Parasaniwa • †Parasaniwa cynochoros – type locality for species • †Parasaniwa wyomingensis – or unidentified comparable form • being preyed upon by the tyrannosaur Teratophoneus †Parasaurolophus'' • †Parasaurolophus cyrtocristatus • †Pariadens • †Pariadens kirklandi – type locality for species • †Pariadens mckennai – type locality for species • †Parmicorbula • †Paronychodon – or unidentified comparable form • †Parotosuchus • †Parotosuchus nov. spec. – informal • †Parussuria • †Parussuria compressa • †Patulopora • †Patulopora cutleri • †Paullia • †Pediomys – report made of unidentified related form or using admittedly obsolete nomenclature • †Pegmavalvula • †Pegmavalvula triassica • †Pelecypodichnus • †Peloroplites – type locality for genus • †Peloroplites cedrimontanus – type locality for species • †Peneteius – type locality for genus • †Peneteius saueri – type locality for species • †Pentasauropus • †Periallus • †Periallus woodsidensis • †Perissoptera • †Permophorus • †Permophorus bregeri – or unidentified comparable form • †Permophorus triassicus • †Pernopecten • †Phelopteria • †Phelopteria minuta – or unidentified comparable form • †Phlebopteris • Pholadomya'' • †Pholadomya inaequiplicata • †Pholadomya kingi • †Piarorhynchella • †Piarorhynchella triassica • †Piarorhynchella triassicus • †Picopsis • †Pinacosuchus – type locality for genus • †Pinacosuchus mantiensis – type locality for species • Pinna • †Pinna kingi • †Pistia – report made of unidentified related form or using admittedly obsolete nomenclature • †Pistia corrugata • †Pityoxylon • †Placenticeras'' • †Placenticeras cumminsi • Placopsilina • †Plagioglypta • †Plagiostoma • †Plagiostoma occidentalis • †Plagiostoma ziona • †Planicoxa – type locality for genus • †Planicoxa venenica – type locality for species • †Planolites • †Plataninium • †Plesiopinna • †Pleuromya • †Pleuromya musculoides – or unidentified comparable form • †Pleuromya prima – type locality for species • †Pleuromya subcompressa • †Pleuronautilus • †Pleuronectites • Pleurotomaria – tentative report • Plicatula • †Plicatula ferryi – or unidentified comparable form • †Podozamites • †Polyacrodus – tentative report • †Polyglyphanodon – type locality for genus • †Polyglyphanodon sternbergi – type locality for species • †Polygyrina • with an anachronistic human to scale †Poposaurus'' • †Poposaurus gracilis • †Preflorianites • †Preflorianites toulai • †Preprismatoolithus • †Preprismatoolithus coloradensis • †Priacodon • †Primaderma – type locality for genus • †Primaderma nessovi – type locality for species • †Prismatoolithus • †Prismatoolithus jenseni – type locality for species • †Procerithium – tentative report • †Promathildia • †Promathildia spirocostata – type locality for species • †Promyalina • †Promyalina putiatinensis • †Promyalina spathi • †Promysidiella • †Pronoella • †Pronoella cinnabarensis – or unidentified comparable form • †Pronoella uintahensis • †Proplacenticeras • †Proplacenticeras stantoni • †Prorokia • †Prorokia fontenellensis • †Protalphadon • †Protocardia • †Protogusarella • †Protogusarella smithi • †Protolambda • †Protolambda hatcheri - North Horn Formation • †Protopis • †Protopis waageni – or unidentified related form • †Protovirgularia • †Psalandon – tentative report • †Pseudaspidoceras • †Pseudocalycoceras • †Pseudocorbula • †Pseudohypolophus • sea snail †Pseudomelania'' • †Pseudomyoconcha – tentative report • †Pseudoptera • †Pseudosageceras • †Pseudosageceras multilobatum • †Pseudosaurillus – or unidentified comparable form • †Pseudotetrasauropus • †Pseudotritonium • †Pseudotritonium sciaphosterum – type locality for species • †Psilomya • †Psilomya concentrica – or unidentified related form • †Psilomya elongata – or unidentified related form • †Pteraichnus • †Pteraichnus saltwashensis – or unidentified comparable form • †Pteraichnus stokesi – or unidentified comparable form • †Ptychotrigon • Pycnodonte'' • †Pycnodonte newberryi ==Q==

• †Quenstedtia • †Quenstedtia bathonica – or unidentified related form ==R==

• †Radioceras • †Radioceras evolvens – or unidentified related form • †Redondasaurus'' • †Redondasaurus gregorii • Rhabdocolpus • †Rhabdocolpus viriosus • †Rhadinosteus – type locality for genus • †Rhadinosteus parvus – type locality for species • †Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature • †Rhynchosauroides • †Rhynchosauroides schochardti • †Rhynchostreon • †Rhynchostreon levis • †Richardoestesia'' • †Richardoestesia isosceles – or unidentified comparable form • Rogerella • †Rotodactylus • †Rotodactylus cursorius – type locality for species ==S==

• †Sabalites • †Sabalites NE008 – informal • Salix • †Salix newberryana • †Sauropelta'' – or unidentified comparable form • †Scalamagnus • †Scalamagnus tropicensis – type locality for species • †Scapherpeton • †Schillerosaurus – type locality for genus • †Schillerosaurus utahensis – type locality for species • †Sciponoceras • †Sciponoceras gracile • †Scotiophryne • †Scotiophryne pustulosa • †Scoyenia • †Seitaad'' – type locality for genus • †Seitaad ruessi – type locality for species • †Sementiconcha – type locality for genus • †Sementiconcha recuperator – type locality for species • †Semionotus • †Semionotus kanabensis – type locality for species • Serpula • †Serpula intrica • †Serpula large • †Sexta • †Sexta navicula – or unidentified related form • †Siats'' – type locality for genus • †Siats meekerorum – type locality for species • †Simplicidium • †Sinbadelphys • †Sinbadelphys schmidti • †Sinbadiella – type locality for genus • †Sinbadiella pygmaea – type locality for species • †Skolithos • †Sohlites • †Sohlites spinosus • Solemya • †Solemya obscura • †Soleniscus • †Spalacolestes • †Spalacolestes cretulablatta • †Spalacolestes inconcinnus – type locality for species • †Spalacotheridium – type locality for genus • †Spalacotheridium mckennai – type locality for species • †Spalacotheridium noblei • †Spheroolithus'' • †Spheruprismatoolithus – type locality for genus • †Spheruprismatoolithus condensis • †Spheruprismatoolithus condensus – type locality for species • Spirorbis – report made of unidentified related form or using admittedly obsolete nomenclature • †Spirorbis valvata – or unidentified comparable form • †Spongioolithus – type locality for genus • †Spongioolithus hirschi – type locality for species • †Squatirhina • †Squatirhina americana • †Stagonolepis • †Stegopodus – type locality for genus • †Stegopodus czerkasi – type locality for species • †Stegosaurus'' • †Stegosaurus stenops – or unidentified comparable form • †Stegosaurus ungulatus • †Stellatochara • †Stellatochara obovata • †Stemmatoceras • †Stemmatoceras albertense – or unidentified related form • †Stemmatoceras arcicostum • †Stephanoceras • †Stephanoceras nodosum – or unidentified related form • †Stokesosaurus'' – type locality for genus • †Stokesosaurus clevelandi – type locality for species • Stomatopora • †Stomohamites • †Strobeus • †Strobeus batteni • †Submeekoceras • †Submeekoceras mushbachanum • †Symmetrocapulus – tentative report • †Symmetrocapulus corrugatus • †Symmetrodontoides • †Symmetrodontoides foxi – type locality for species • †Symmetrodontoides oligodontos – type locality for species • †Syncyclonema • †Synorichthys • †Synorichthys stewarti ==T==

• †Talos'' – type locality for genus • †Talos sampsoni – type locality for species • †Tancredia – tentative report • †Tanycolagreus • †Tanycolagreus topwilsoni • †Teinostomopsis – tentative report • †Tempskya • †Tempskya jonesii – type locality for species • †Tempskya knowltoni • †Tempskya minor • †Tempskya superba • †Tempskya whiteheadi – type locality for species • †Tenontosaurus • †Teratophoneus'' – type locality for genus • †Teratophoneus curriei – type locality for species • Teredolites • †Teredolites clavatus • †Tethyaster • †Tethyaster jurassicus – type locality for species • †Tetrasauropus • †Thalassinoides • †Therangopodus – tentative report • †Therangospodus – type locality for genus • †Therangospodus pandemicus – type locality for species • †Theretairus • †Thescelus • †Thescelus insiliens • Thracia • †Thracia weedi • †Tirolites • †Tirolites carniolicus – tentative report • †Tirolites smithi – or unidentified related form • †Torvosaurus'' • †Toxolophosaurus – or unidentified comparable form • †Trachodon • †Torosaurus • †Torosaurus utahensis • †Triconolestes – type locality for genus • †Triconolestes curvicuspis – type locality for species • †Trigonia • †Trigonia americana • †Trigonia elegantissima • †Trigonia montanaensis • †Trigonodus • †Trigonodus orientalis – or unidentified comparable form • †Trigonodus sandbergeri – or unidentified comparable form • †Trigonodus sandbergi – or unidentified comparable form • †Trinacromerum'' • †Trinacromerum bentonianum – tentative report • †Tripennaculus – type locality for genus • †Tripennaculus eatoni – type locality for species • †Trisauropodiscus • †Trisauropodiscus moabensis – type locality for species • Trochocyathus • †Trochosmilia • †Trochosmilia moorei – type locality for species • †Tulotomops • †Tulotomops laevibasalis • †Turgidodon – type locality for genus • †Turgidodon lillegraveni – type locality for species • †Turgidodon madseni – type locality for species • †Turgidodon russelli – or unidentified comparable form • Turritella • †Turritella whitei • †Tylostoma – tentative report • †Tyrannosauripus'' – type locality for genus • †Tyrannosauripus petersoni – type locality for species • †Tyrannosaurus ==U==