List of the Mesozoic life of Montana

• †Achelousaurus – type locality for genus • †Achelousaurus horneri – type locality for species • †Acheroraptor'' – type locality for genus • †Acheroraptor temertyorum – type locality for species • Acipenser • †Acipenser eruciferus • †Acristavus – type locality for genus • †Acristavus gagslarsoni – type locality for species • †Acrostichopteris • †Acrostichopteris longipennis • †Adiantites • †Adiantites montanensis • †Adocus • †Albanerpeton • †Albanerpeton nexuosus • †Albertaceratops'' • †Albertaceratops nesmoi • †Albertatherium • †Albertatherium primus • †Albertosaurus • †Allocrioceras • †Allocrioceras annulatum • †Allosaurus'' • †Alostera • †Alostera saskatchewanensis • †Alphadon • †Alphadon attaragos • †Alphadon halleyi – type locality for species • †Alphadon marshi • †Alphadon wilsoni • †Altacreodus • †Altacreodus magnus • †Alzadasaurus – tentative report • †Alzadites – type locality for genus • †Alzadites alzadensis – type locality for species • †Ambilestes • †Ambilestes cerberoides – or unidentified comparable form • Amia • †Amia fragosa • †Amia uintaensis • †Amphicoelias • †Anatotitan • †Anatotitan copei • †Anchura – tentative report • †Ankylosaurus'' – type locality for genus • †Ankylosaurus magniventris – type locality for species • †Anomozamites • †Aquiladelphis • †Aquiladelphis incus • †Aquiladelphis minor • †Aquilapollenites • †Aquilapollenites collaris • †Aquilapollenites conatus • †Aquilapollenites marmarthensis • †Aquilapollenites mtchedlishvilii • †Aquilapollenites quadrilobus • †Aquilapollenites turbidus • †Aquilops'' – type locality for genus • †Aquilops americanus – type locality for species • Aralia – or unidentified comparable form • †Aralia wellingtonia • †Araliaephyllum • †Araliaephyllum westonii • †Araliopsoides • †Araliopsoides cretacea – or unidentified comparable form • †Araucarites • †Araucarites longifolia • †Arcellites • †Archaeolamna • †Archaeolamna kopingensis • †Archaeotriakis – type locality for genus • †Archaeotriakis rochelleae – type locality for species • †Arcticoceras'' – tentative report • †Arctocephalites • †Arctocephalites gracilis – or unidentified comparable form • †Arctocephalites maculatus – or unidentified comparable form • †Arctocephalites platynotus – or unidentified comparable form • †Arctocephalites sawtoothensis • †Arctocephalites saypoensis • †Argaliatherium – type locality for genus • †Argaliatherium robustum – type locality for species • †Ariadnaesporites • †Ariadnaesporites fluviatilis – type locality for species • †Ascarinites – type locality for genus • †Ascarinites communis – type locality for species • †Aspideretoides • †Aspidophyllum – or unidentified comparable form • †Aspidophyllum trilobatum • †Asplenium • bivalve Astarte'' • †Astarte meeki • †Astarte morion • †Astarte packardi – or unidentified comparable form • †Athrotaxites • †Athrotaxites berryi – or unidentified comparable form • †Aublysodon • †Aublysodon mirandus • †Austrotindaria • †Austrotindaria canalensis • †Austrotindaria svalbardensis • †Avaceratops – type locality for genus • †Avaceratops lammersi – type locality for species • Avicula • with prey †Avisaurus'' – type locality for genus • †Avisaurus archibaldi – type locality for species • †Avisaurus gloriae – type locality for species • †Axestemys • †Axestemys splendida – type locality for species • Azolla • †Azolla barbata • †Azolla circinata – type locality for species • †Azolla distincta • †Azolla simplex – type locality for species • †Azolla spinata – type locality for species • †Azollopsis – type locality for genus • †Azollopsis coccoides – type locality for species • †Azollopsis tomentosa – type locality for species ==B==

• †Baculatisporites • †Baculites'' • †Baculites asper • †Baculites codyensis • †Baculites compressus • †Baculites mariasensis • †Baena • †Baena callosa – type locality for species • †Baioconodon • †Baioconodon nordicus – or unidentified comparable form • †Bakevellia • †Bambiraptor'' – type locality for genus • †Bambiraptor feinbergi – type locality for species • Barbourula – or unidentified comparable form • †Basilemys • †Basilemys sinuosa – type locality for species • †Batodon • †Batodon tenuis • †Belfria – type locality for genus • †Belfria microphylla – type locality for species • †Belonostomus'' • †Belonostomus longirostris • †Bernissartia • †Biretisporites • †Biretisporites deltoideus • †Borealosuchus • †Borealosuchus sternbergii • †Boremys • †Boremys pulchra • †Borissiakoceras • †Borissiakoceras orbiculatum • Brachaelurus • †Brachaelurus estesi • †Brachyceratops – type locality for genus • †Brachyceratops montanensis – type locality for species • †Brachychampsa – type locality for genus • †Brachychampsa montana – type locality for species • †Brachychampsa montanus • †Brachylophosaurus'' • †Brachylophosaurus canadensis – type locality for species • †Buccinammonites – type locality for genus • †Buccinammonites minimus – type locality for species ==C==

• †Camarasaurus'' • Campeloma • †Camptonectes • †Camptonectes platessiformis • †Camptonectes stygius • Carcharias • †Cardiaster • †Cardiaster curtus • †Carinalestes – type locality for genus • †Carinalestes murensis – type locality for species • †Cedrobaena • †Cedrobaena brinkman • †Celastrophyllum – or unidentified comparable form • †Centrosaurus'' • †Cerasinops – type locality for genus • †Cerasinops hodgskissi – type locality for species • †Ceratodus • †Ceratodus frazieri • †Ceratodus guentheri – or unidentified comparable form • †Ceratops – type locality for genus • †Ceratops montanus – type locality for species • †Cerberophis – type locality for genus • †Cerberophis robustus – type locality for species • †Cercomya • †Cercomya punctata • †Chamops • †Chamops segnis • †Champsosaurus • †Champsosaurus natator • †Chasmosaurus'' – or unidentified comparable form • Chiloscyllium • †Chiloscyllium missouriensis – type locality for species • †Chirostenotes • †Chirostenotes elegans • Chlamys • †Chondroceras • †Chondroceras allani – or unidentified comparable form • †Chondroceras oblatum • †Cimexomys • †Cimexomys minor • †Cimolestes • †Cimolestes incisus • †Cimolestes stirtoni • †Cimoliasaurus • †Cimolodon • †Cimolodon nitidus • †Cimolomys'' • †Cimolomys clarki – type locality for species • †Cimolomys gracilis • †Cimolopteryx • †Cimolopteryx maxima • †Cinnamomoides • Cladophlebis • †Cladophlebis alberta • †Cladophlebis constricta • †Cladophlebis heterophylla • †Cladophlebis inclinata • †Cladophlebis oblongifolia • †Cladophlebis oerstedi • †Cladophlebis virginiensis • †Claosaurus • †Claraia • †Claraia aurita • †Claraia clarai • †Claraia mulleri • †Claraia stachei • †Clidastes'' • †Clioscaphites • †Clioscaphites vermiformis • †Cobbanites • †Coelostylina • †Colpodontosaurus • †Colpodontosaurus cracens • †Componocancer • †Componocancer roberti • †Compsemys • †Compsemys victa • †Coniophis • †Coniophis precedens • †Coniopteris • †Coniopteris bella – or unidentified comparable form • †Coniopteris hymenophylloides • †Coniopteris simplex • †Continuoolithus • †Continuoolithus canadensis • †Contogenys – type locality for genus • †Contogenys sloani – type locality for species • †Coriops • †Coriops amnicolus • †Corviconodon • †Corviconodon montanensis – type locality for species • †Corythosaurus'' • †Corythosaurus casuarius • Crassatella • †Cremnoceramus • †Cremnoceramus deformis • †Cretolamna • †Cretolamna appendiculata • †Cretorectolobus – type locality for genus • †Cretorectolobus olsoni – type locality for species • †Crocodilus • †Crocodilus humilis • †Cryptometoicoceras • †Cryptometoicoceras mite • Cucullaea • †Cucullaea haguei • †Cucullaea rockymontana • †Cyathidites • †Cyathidites minor • †Cycadolepis • †Cycadopites • †Cycadopites fragilis • †Cyclurus • †Cyclurus fragosus ==D==

• †Daspletosaurus • †Daspletosaurus horneri – type locality for species • †Deinodon – type locality for genus • †Deinodon horridus – type locality for species • †Deinonychus'' – type locality for genus • †Deinonychus antirrhopus – type locality for species • †Deinosuchus – type locality for genus • †Deinosuchus rugosus – type locality for species • †Deltoidospora • †Deltoidospora cascadensis – type locality for species • †Deltoidospora diaphana • †Deltoidospora hallii – type locality for species • Dentalium • †Derrisemys • †Derrisemys sterea • †Diclonius • †Dictyothykalos • †Didelphodon'' • †Didelphodon vorax • †Didymoceras • †Didymoceras cheyennense • †Didymoceras nebrascense • †Didymoceras stevensoni • †Diettertia • †Diettertia montanensis • †Diplodocus'' • †Doratodon – or unidentified comparable form • †Dromaeosaurus • †Dromaeosaurus albertensis • †Dryophyllum – report made of unidentified related form or using admittedly obsolete nomenclature • †Dryophyllum subfalcatum • †Dunveganoceras • †Dunveganoceras albertense • †Dunveganoceras parvum – type locality for species • †Dunveganoceras pondi • †Dyadonapites • †Dyadonapites reticulatus • †Dyoplosaurus'' • †Dyoplosaurus acutosquameus ==E==

• †Echinatisporis • †Ectocentrocristus • †Ectocentrocristus foxi – type locality for species • †Ectoconodon • †Ectoconodon montanensis – type locality for species • †Edgarosaurus • †Edgarosaurus muddi • †Edmontonia • †Edmontonia longiceps • †Edmontonia rugosidens – type locality for species • †Edmontosaurus • †Edmontosaurus annectens'' • †Einiosaurus – type locality for genus • †Einiosaurus procurvicornis – type locality for species • †Elasmodus • †Elasmodus greenoughi – or unidentified comparable form • †Emarginachelys – type locality for genus • †Emarginachelys cretacea – type locality for species • †Entolioides • †Entolioides utahensis • †Eodelphis • †Eopelobates – or unidentified comparable form • , or horsetail †Equisetum'' • †Equisetum cascadensis – type locality for species • †Equisetum laterale • †Equisetum montanensis • †Erdtmanipollis • †Erdtmanipollis procumbentiformis • †Essonodon – type locality for genus • †Essonodon browni – type locality for species • †Eubaena • †Eubaena cephalica • †Eucrossorhinus • †Eucrossorhinus microcuspidatus – type locality for species • †Eumorphotis • †Eumorphotis amplicostata – type locality for species • †Eumorphotis ericius – or unidentified comparable form • †Eumorphotis multiformis • †Euomphaloceras • †Euomphaloceras septemseriatum • †Euoplocephalus'' • †Euoplocephalus tutus • †Eutrephoceras • †Eutrephoceras montanensis – type locality for species • †Exiteloceras • †Exiteloceras jenneyi • †Exogyra • †Exogyra columbella • †Exostinus • †Exostinus lancensis ==F==

• †Falepetrus • †Falepetrus barwini • Ficus – or unidentified comparable form • †Ficus ovatifolia • †Fletcherithyris – report made of unidentified related form or using admittedly obsolete nomenclature • †Fletcherithyris margaritovi • †Foraminisporis • †Foraminisporis undulates ==G==

• †Gastopoda • †Gervillia • †Gervillia ussurica – or unidentified comparable form • †Gilmoremys • †Gilmoremys lancensis • Ginkgo'' • †Ginkgo pluripartita • †Ginkgoites • †Ginkgoites cascadensis • †Ginkgoites pluripartita • †Glasbius • †Glasbius twitchelli – type locality for species • †Glishades – type locality for genus • †Glishades ericksoni – type locality for species • †Glyptops • †Glyptops pervicax – type locality for species • Glyptostrobus – or unidentified comparable form • †Gobiconodon'' – type locality for genus • †Gobiconodon ostromi – type locality for species • †Goniobasis • †Goniobasis subtortuosa • †Gorgosaurus • †Gorgosaurus libratus – type locality for species • †Grammatodon • †Grewipollenites • †Grewipollenites radiatus • †Gryphaea'' • †Gryphaea – type locality for species – informal • †Gryphaea impressimarginata • †Gryposaurus • †Gryposaurus latidens – type locality for species • †Gryposaurus notabilis • †Gypsonictops • †Gypsonictops hypoconus • †Gypsonictops illuminatus • †Gypsonictops lewisi – type locality for species • Gyrodes • †Gyrodes conradi ==H==

• †Habrosaurus • †Habrosaurus dilatus • †Hadrosaurus • †Hadrosaurus breviceps – type locality for species • †Hadrosaurus paucidens – type locality for species • †Hamites • †Hamites cimarronensis • †Haptosphenus • †Haptosphenus placodon • †Hausmannia • †Hausmannia fisheri • †Hausmannia montanensis • †Helopanoplia • †Helopanoplia distincta • †Hesperornis'' • †Hesperornis montana – type locality for species • †Heteropecten – tentative report • †Holocrinus • †Hoploscaphites • †Hoploscaphites macer – type locality for species • †Hummelichelys • †Hummelichelys beecheri • †Hummelichelys foveatus – type locality for species • †Hybodus • †Hybodus montanensis – type locality for species • †Hybodus storeri – type locality for species • †Hypacrosaurus • †Hypacrosaurus stebingeri – type locality for species • †Hypotodus • †Hypotodus grandis – type locality for species ==I==

• †Idiohamites • †Idiohamites bispinosus – type locality for species • †Idiohamites pulchellus – type locality for species • with a human indicating its size †Inoceramus'' • †Inoceramus arnoldi • †Inoceramus canaliculatus • †Inoceramus cancellatus • †Inoceramus cardissoides - or unidentified loosely related form • †Inoceramus cordiformis – or unidentified comparable form • †Inoceramus erectus • †Inoceramus fragilis – or unidentified related form • †Inoceramus frechi – or unidentified comparable form • †Inoceramus gibbosus • †Inoceramus gilli – type locality for species • †Inoceramus glacierensis – type locality for species • †Inoceramus koeneni • †Inoceramus latisulcatus – or unidentified comparable form • †Inoceramus lesginensis • †Inoceramus lingua – or unidentified comparable form • †Inoceramus lundbreckensis • †Inoceramus sokolovi – type locality for species • †Inoceramus undabundus • †Inoceramus walterdorfensis • †Iqualadelphis • †Iqualadelphis lactea • †Ischyodus'' • †Ischyodus bifurcatus • †Ischyrhiza • †Ischyrhiza avonicola • †Ischyrhiza mira • †Isocyprina – or unidentified comparable form • †Isocyprina iddingsi ==J==

• †Judiceratops'' – type locality for genus • †Judiceratops tigris – type locality for species • †Judithemys • †Judithemys backmani ==K==

• †Kastanoceras – type locality for genus • †Kastanoceras spiniger – type locality for species • †Klukia • †Klukia canadensis • †Kritosaurus'' • †Kritosaurus breviceps – or unidentified comparable form • †Krokolithes ==L==

• †Labrodioctes – type locality for genus • †Labrodioctes montanensis – type locality for species • †Laevigatosporites • †Laevigatosporites haardtii • †Lepidotes'' • †Lepidotes haydeni – type locality for species • †Lepidotes occidentalis – type locality for species • †Lepismatina – report made of unidentified related form or using admittedly obsolete nomenclature • †Lepismatina mansfieldi • Lepisosteus • †Lepisosteus occidentalis • †Leptalestes • †Leptalestes cooki • †Leptalestes krejcii • †Leptalestes prokrejcii • †Leptalestes toevsi – type locality for species • †Leptoceratops'' • †Leptoceratops gracilis • †Leptochamops • †Leptochamops denticulatus • †Leptochondria • †Leptochondria occidanea • †Leptopecopites • †Leptopecopites pocockii • †Leptorhynchos – tentative report • †Lesterwardia – type locality for genus • †Lesterwardia palustris – type locality for species • †Liliacidites • †Lingula • †Lingularia • †Lingularia borealis • †Lioplacodes • †Lioplacodes judithensis • †Lioplacodes williamsi • †Liostrea • †Liostrea strigilecula • †Lisserpeton – type locality for genus • †Lisserpeton atlantes • †Lisserpeton bairdi – type locality for species • †Lonchidion • †Lonchidion selachos • Lopha'' • †Lucina • Lunatia • †Lunatia dakotensis – or unidentified comparable form • †Lygobius – type locality for genus • †Lygobius knowltoni – type locality for species ==M==

• †Magadiceramus • †Magadiceramus soukupi • †Magnuviator – type locality for genus • †Magnuviator ovimonsensis – type locality for species • †Maiasaura – type locality for genus • †Maiasaura peeblesorum – type locality for species • †Marchantiolites • †Marchantiolites blairmorensis • †Marmarthia • †Marmarthia trivialis • †Medusaceratops – type locality for genus • †Medusaceratops lokii – type locality for species • †Meleagrinella • †Meleagrinella curta • †Melvius – type locality for genus • †Melvius thomasi – type locality for species • †Meniscoessus • †Meniscoessus major • †Meniscoessus robustus – type locality for species • †Meniscognathus • †Meniscognathus altmani • †Mercuriceratops'' – type locality for genus • †Mercuriceratops gemini – type locality for species • †Mesodma • †Mesodma formosa • †Mesodma hensleighi • †Mesodma primaeva • †Mesodma thompsoni • †Metoicoceras • †Metoicoceras geslinianum • †Metoicoceras mosbyense – type locality for species • †Metoicoceras muelleri • †Metzgeriites • †Metzgeriites montanensis – type locality for species • †Micrabacia • †Micrabacia radiata • †Microsulcatoceras – type locality for genus • †Microsulcatoceras puzosiiforme – type locality for species • †Microvenator'' – type locality for genus • †Microvenator celer – type locality for species • †Minerisporites • †Minerisporites pseudorichardsonii • †Miocidaris • †Modiolus • †Modiolus rosii • †Monoclonius – type locality for genus • †Monoclonius crassus – type locality for species • †Monoclonius recurvicornis – type locality for species • †Monoclonius sphenocerus – type locality for species • †Monosulcites • †Monosulcites riparius • †Montanalestes • †Montanalestes keeblerorum • †Montanazhdarcho'' – type locality for genus • †Montanazhdarcho minor – type locality for species • †Montania – type locality for genus • †Montania glandulosa – type locality for species • †Montanoceratops • †Montanoceratops cerorhynchus – type locality for species • †Montanoolithus – type locality for genus • †Montanoolithus strongorum – type locality for species • †Moremanoceras • †Moremanoceras costatum • †Moremanoceras montanaense – type locality for species • †Moremanoceras straini • †Mosasaurus • †Mosasaurus missouriensis • †Myalina • †Myalina postcarbonica • †Myledaphus • †Myledaphus bipartitus • mussels †Mytilus'' ==N==

• †Nannometoicoceras • †Nannometoicoceras nanos – type locality for species • , possibly a juvenile Tyrannosaurus rather than a distinct genus †Nanotyrannus'' • †Nanotyrannus lancensis – type locality for species • †Naomichelys – type locality for genus • †Naomichelys speciosa – type locality for species • †Necrocarcinus • †Nelumbo • †Nelumbo peltata – type locality for species • †Neocardioceras • †Neocardioceras juddii • †Neocardioceras minutum • †Neogastroplites • †Neogastroplites haasi • †Neoplagiaulax • †Neoplagiaulax burgessi – type locality for species • †Neoschizodus • †Neurankylus – type locality for genus • †Neurankylus eximius – type locality for species • †Nezpercius – type locality for genus • †Nezpercius dodsoni – type locality for species • †Nidimys – type locality for genus • †Nidimys occultus – type locality for species • †Nilsonia • †Nilsonia compta – or unidentified comparable form • †Normannites – tentative report • †Normannites crickmayi – or unidentified comparable form • †Nortedelphys – type locality for genus • †Nortedelphys jasoni – type locality for species • †Nortedelphys minimus – type locality for species • †Notogoneus'' • †Notogoneus montananesis – type locality for species • †Notogoneus montenensis – type locality for species • Nucula • †Nymphaeites ==O==

• †Obamadon – type locality for genus • †Obamadon gracilis – type locality for species • †Odaxosaurus • †Odaxosaurus piger • Odontaspis • †Odontaspis sanguinei – type locality for species • †Oklatheridium • †Oklatheridium wiblei – type locality for species • †Onchosaurus • †Onchosaurus avonicolus • †Oohkotokia'' – type locality for genus • †Oohkotokia horneri – type locality for species • †Ophioglypha • †Ophioglypha bridgerensis • †Ophiomorpha • †Opisthotriton • †Opisthotriton kayi • †Orbicoelia • †Ornithomimus • †Ornithomimus grandis – type locality for species • †Ornithomimus tenuis – type locality for species • †Orodromeus – type locality for genus • †Orodromeus makelai – type locality for species • in a burrow †Oryctodromeus'' – type locality for genus • †Oryctodromeus cubicularis – type locality for species • Ostrea • †Oxybeloceras • †Oxybeloceras crassum • †Oxytoma • †Oxytoma mclearni ==P==

• butting heads †Pachycephalosaurus'' – type locality for genus • †Pachycephalosaurus wyomingensis – type locality for species • †Pagiophyllum • †Palaeobatrachus • †Palaeobatrachus occidentalis • †Palaeolabrus • †Palaeolabrus montanensis • †Palaeosaniwa • †Palaeosaniwa canadensis • †Palaeoscincus – type locality for genus • †Palaeoscincus costatus – type locality for species • †Palatobaena • †Palatobaena bairdi • †Paleopsephurus – type locality for genus • †Paleopsephurus wilsoni – type locality for species • †Paleoungulatum – type locality for genus • †Paleoungulatum hooleyi – type locality for species • †Panoplosaurus'' • †Pappotherium • †Pappotherium pattersoni • †Parachondroceras • †Parachondroceras andrewsi • †Parachondroceras filicostatum • †Paracimexomys • †Paracimexomys judithae – type locality for species • †Paracimexomys magnus – type locality for species • †Paracimexomys priscus • †Paracimexomys propriscus – type locality for species • †Paracimexomys robisoni – or unidentified comparable form • †Paraderma • †Paraderma bogerti • †Paralbula • †Paralbula casei • †Paramacellodus – or unidentified comparable form • †Paramacellodus keebleri – type locality for species • †Paranecturus – type locality for genus • †Paranecturus garbanii – type locality for species • †Paranyctoides • †Paranyctoides maleficus • with a human indicating its size †Parapuzosia'' • †Parapuzosia bradyi – type locality for species • †Parasaniwa • †Parasaniwa wyomingensis • †Parataxodium • †Parazolla – type locality for genus • †Parazolla heterotricha – type locality for species • †Parazollopsis – type locality for genus • †Parazollopsis cascadensis – type locality for species • †Paronychodon • †Paronychodon lacustris • †Pectinodon'' – or unidentified comparable form • †Pediomys • †Pediomys elegans • †Peneteius – type locality for genus • †Peneteius aquilonius – type locality for species • †Penetetrapites • †Penetetrapites inconspicuous • †Pentacrinus • †Pentacrinus asteriscus • †Permophorus • †Permophorus triassicus • †Phelopteria • Pholadomya • †Pholadomya inaequiplicatus • †Pholadomya kingi • freshwater bladder snails Physa'' • †Physa copei – or unidentified comparable form • †Piceoerpeton • †Piceoerpeton naylori – type locality for species • †Piksi – type locality for genus • †Piksi barbarulna – type locality for species • †Pinna • †Pinna kingi • †Pistia • †Pistia corrugata • †Pityocladus • †Pityophyllum • †Pityophyllum lindstromi • †Pityosporites • †Pityosporites constrictus • †Placunopsis • †Plastomenus • †Plastomenus costatus • †Platacodon • †Platacodon nanus • †Platanophyllum • †Plesiacanthoceras • †Plesiacanthoceras wyomingense • †Plesiacanthoceratoides • †Plesiacanthoceratoides alzadense • †Plesiobaena • †Plesiobaena antiqua • †Pleuromya • †Pleuromya oblongata – or unidentified comparable form • †Pleuromya subcompressa • †Pleuronautilus • †Pleuronectites – tentative report • †Plicatolamna • †Plicatolamna arcuata • †Podozamites • †Podozamites lanceolatus • †Polycingulatisporites • †Polycingulatisporites reduncus • †Prenoceratops'' – type locality for genus • †Prenoceratops pieganensis – type locality for species • †Prismatoolithus • †Prismatoolithus hirschi – type locality for species • †Prismatoolithus levis • †Pristinuspollenites • †Pristinuspollenites microsaccus • †Proamphiuma • †Proamphiuma cretacea • †Procerberus • †Prodesmodon • †Prodesmodon copei • †Promyalina • †Promyalina spathi – type locality for species • †Prosaurolophus'' • †Prosaurolophus blackfeetensis – type locality for species • †Protalphadon • †Protalphadon foxi – type locality for species • †Protalphadon lulli • †Protexanites • †Protocaiman • †Protocardia • †Protocardia schucherti • †Protolambda • †Protolambda mcgilli – type locality for species • †?Protolambda clemensi – type locality for species • †Protolambda florencae • †Protolambda hatcheri • †Protolamna • †Protolamna sokolovi • †Protophyllocladus • †Protophyllocladus subintegrifolius • †Protophyllum – or unidentified comparable form • †Protoplatyrhina – type locality for genus • †Protoplatyrhina renae – type locality for species • †Protoscaphirhynchus – type locality for genus • †Protoscaphirhynchus squamosus – type locality for species • †Protungulatum'' • †Protungulatum coombsi – type locality for species • †Protungulatum gorgun • †Psammorhynchus • †Psammorhynchus longipinnis – type locality for species • †Pseudocycas • †Pseudocycas douglasii – type locality for species • †Pseudohypolophus • †Pseudomelania • †Pseudomelania hendricksoni • †Pteria – tentative report • †Pteria ussurica – or unidentified comparable form • †Pteropelyx – type locality for genus • †Pteropelyx grallipes – type locality for species • †Ptychotrygon • †Ptychotrygon blainensis – type locality for species • †Ptychotrygon hooveri • †Ptychotrygon triangularis • Pycnodonte'' ==Q==

• †Quenstedtia – tentative report • Quercus – report made of unidentified related form or using admittedly obsolete nomenclature • †Quercus stantoni • feeding on the ground †Quetzalcoatlus'' – or unidentified comparable form ==R==

• †Retinovena – type locality for genus • †Retinovena fluvialis – type locality for species • †Retitricolpites • †Retitricolpites microreticulatus • Rhabdocolpus • †Rhaeboceras • †Rhaeboceras burkholderi – type locality for species • †Rhaeboceras cedarense – type locality for species • †Rhaeboceras coloradoense • †Rhaeboceras halli • †Rhaeboceras subglobosum • †Rhamnus – report made of unidentified related form or using admittedly obsolete nomenclature • †Rhamnus cleburni • †Richardoestesia • †Richardoestesia gilmorei • †Richardoestesia isosceles • †Rostellites – tentative report • †Rugocaudia – type locality for genus • †Rugocaudia cooneyi – type locality for species ==S==

• †Sagenopteris • †Sagenopteris elliptica • †Sagenopteris mclearni • †Sagenopteris williamsii • †Sauropelta'' – type locality for genus • †Sauropelta edwardsorum – type locality for species • †Saurornitholestes • †Saurornitholestes langstoni • †Scabrastephanocolpites • †Scabrastephanocolpites lepidus • †Scapherpeton • †Scapherpeton tectum • †Scaphites • †Scaphites impendicostatus • †Scaphites mariasensis • †Scaphites preventricosus • †Scaphites ventricosus • †Scaphotrigonia • †Scaphotrigonia naviformis • †Schizolepis • †Schizosporis • †Schizosporis laevigatus • †Sciponoceras • †Sciponoceras gracile • †Scollardius • †Scollardius propalaeoryctes • †Scolosaurus'' • †Scolosaurus cutleri • †Scotiophryne – type locality for genus • †Scotiophryne pustulosa – type locality for species • †Sequoia • †Siberiapollis • †Siberiapollis montanensis • †Sohlites • †Sohlites spinosus • †Solenoceras • †Solenoceras bearpawense • †Spalacotheridium • †Spalacotheridium mckennai • Sphaerium • †Sphaerium planum • †Sphaerotholus • †Sphaerotholus buchholtzae – type locality for species • †Sphenopteris • †Sphenopteris brulensis • †Sphenopteris geopperti • †Sphenopteris goepperti • †Sphenopteris latiloba • †Sphenopteris mclearni • †Spheroolithus • †Spheroolithus albertensis • †Spheroolithus choteauensis – type locality for species • †Spheroolithus maiasauroides • †Spiclypeus'' – type locality for genus • †Spiclypeus shipporum – type locality for species • †Spiriferina – report made of unidentified related form or using admittedly obsolete nomenclature • †Sporonites • †Sporonites montanensis – type locality for species • Squalicorax • †Squalicorax kaupi • †Squalicorax pristodontus • †Squatirhina • †Squatirhina americana • †Stantoniella – type locality for genus • †Stantoniella cretacea – type locality for species • †Stegoceras • †Stegoceras validum • †Stegosaurus'' • †Stemmatoceras • †Stemmatoceras albertense – or unidentified related form • †Stemmatoceras arcicostum • †Stemmatoceras palliseri – or unidentified related form • †Stygiochelys – type locality for genus • †Stygiochelys estesi – type locality for species • †Styracosaurus • †Styracosaurus ovatus – type locality for species • †Sumitomoceras • †Suuwassea – type locality for genus • †Suuwassea emilieae – type locality for species • †Symmetrodontoides • †Symmetrodontoides canadensis • †Synechodus • †Synechodus andersoni – type locality for species • †Synechodus striatus – type locality for species ==T==

• †Tancredia • †Tancredia inornata – or unidentified comparable form • †Tarrantoceras • †Tarrantoceras cuspidum • †Tatankacephalus – type locality for genus • †Tatankacephalus cooneyorum – type locality for species • †Taxodiaceaepollenites • †Taxodiaceaepollenites hiatus • †Tenontosaurus'' – type locality for genus • †Tenontosaurus tilletti – type locality for species • †Terminonaris – type locality for genus • †Terminonaris browni – type locality for species • †Terminonaris robusta – type locality for species • †Thalassomedon – type locality for genus • †Thalassomedon hanningtoni – type locality for species • †Thescelosaurus • †Thescelosaurus garbanii – type locality for species • †Thescelosaurus neglectus • †Thescelus • †Thescelus insiliens • †Thlaeodon – tentative report • †Todisporites • †Todisporites dubius – or unidentified comparable form • †Toxolophosaurus – type locality for genus • †Toxolophosaurus cloudi – type locality for species • †Trachodon – type locality for genus • †Trachodon altidens • †Trachodon marginatus • †Trachodon mirabilis – type locality for species • †Trachytriton • †Trachytriton – type locality for species – informal • †Triceratops'' • †Triceratops horridus • †Triceratops maximus – type locality for species • †Triceratops prorsus • †Trigonia • †Trigonia conradi – or unidentified comparable form • †Trigonia montanaensis • †Trigonia trafalgarensis – or unidentified comparable form • †Trigonocallista • †Trigonocallista orbiculata • Trionyx • †Triprismatoolithus – type locality for genus • †Triprismatoolithus stephensi – type locality for species • †Trochicola • †Trochicola scollardiana • †Trochodendroides • †Troodon'' – type locality for genus • †Troodon formosus – type locality for species • †Tubercuoolithus – type locality for genus • †Tubercuoolithus tetonensis – type locality for species • †Tubulifloridites • †Tubulifloridites aedicula • †Tullochelys • †Tullochelys montana • †Turgidodon • †Turgidodon praesagus • †Turgidodon rhaister • †Turgidodon russelli • Turritella • †Tylosaurus • †Tylosaurus proriger • †Tyrannosaurus'' – type locality for genus • †Tyrannosaurus rex – type locality for species ==U==