List of the Mesozoic life of Montana

From Wikipedia, the free encyclopedia

This list of the Mesozoic life of Montana contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Montana and are between 252.17 and 66 million years of age.

A[]

  • †Achelousaurus – type locality for genus
    • †Achelousaurus horneri – type locality for species
  • Life restoration of the Late Cretaceous dromaeosaurid ("raptor") Acheroraptor
    †Acheroraptor – type locality for genus
    • †Acheroraptor temertyorum – type locality for species
  • Acipenser
    • †
  • †Acristavus – type locality for genus
    • †Acristavus gagslarsoni – type locality for species
  • †
    • †
  • †
    • †
  • †Adocus
  • †Albanerpeton
    • †Albanerpeton nexuosus
  • Life restoration of the Late Cretaceous horned dinosaur Albertaceratops
    †Albertaceratops
    • †Albertaceratops nesmoi
  • †
    • †
  • †Albertosaurus
  • †
    • † – type locality for species
    • †
    • †
  • †Allocrioceras
    • †
  • Life restoration of the Late Jurassic theropod dinosaur Allosaurus
    †Allosaurus
  • †
    • †
  • †Alphadon
    • †Alphadon attaragos
    • †Alphadon halleyi – type locality for species
    • †Alphadon marshi
    • †Alphadon wilsoni
  • †Altacreodus
    • †Altacreodus magnus
  • †Alzadasaurus – tentative report
  • † – type locality for genus
    • † – type locality for species
  • †
    • † – or unidentified comparable form
  • Amia
    • †
    • †
  • †Amphicoelias
  • †Anatotitan
    • †Anatotitan copei
  • † – tentative report
  • Image of restored specimen of a squat quadruped with knobby back
    Life restoration of the Late Cretaceous armored dinosaur Ankylosaurus
    †Ankylosaurus – type locality for genus
    • †Ankylosaurus magniventris – type locality for species
  • †
  • †
    • †
    • †
  • †
    • †
    • †
    • †
    • †
    • †
    • †
  • Life restoration of the Early Cretaceous primitive horned dinosaur Aquilops
    †Aquilops – type locality for genus
    • †Aquilops americanus – type locality for species
  • Aralia – or unidentified comparable form
    • †
  • †
    • †
  • †
    • † – or unidentified comparable form
  • †Araucarites
    • †
  • †
  • †Archaeolamna
    • †
  • †Archaeotriakis – type locality for genus
    • † – type locality for species
  • Fossilized shells of the Middle Jurassic ammonoid cephalopod Arcticoceras
    †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
  • † – type locality for genus
    • † – type locality for species
  • †
    • † – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †
  • † – or unidentified comparable form
    • †
  • †Asplenium
  • Shell of a modern Astarte bivalve
    Astarte
    • †
    • †
    • † – or unidentified comparable form
  • †
    • † – or unidentified comparable form
  • †Aublysodon
    • †Aublysodon mirandus
  • †
    • †
    • †
  • †Avaceratops – type locality for genus
    • †Avaceratops lammersi – type locality for species
  • Life restoration of the Late Cretaceous toothed bird Avisaurus perched on a crocodilian
    †Avisaurus – type locality for genus
    • †Avisaurus archibaldi – type locality for species
    • †Avisaurus gloriae – type locality for species
  • †Axestemys
    • † – type locality for species
  • Azolla
    • †
    • † – type locality for species
    • †
    • † – type locality for species
    • † – type locality for species
  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species

B[]

  • †
  • Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites
    †Baculites
    • †Baculites asper
    • †Baculites codyensis
    • †Baculites compressus
    • †Baculites mariasensis
  • †Baena
    • † – type locality for species
  • †
    • † – or unidentified comparable form
  • †
  • Diagram of the known fossil material of the Late Cretaceous dromaeosaurid ("raptor") Bambiraptor
    †Bambiraptor – type locality for genus
    • †Bambiraptor feinbergi – type locality for species
  • Barbourula – or unidentified comparable form
  • †Basilemys
    • † – type locality for species
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • Fossilized skeleton of the Late Cretaceous bony fish Belonostomus
    †Belonostomus
    • †Belonostomus longirostris
  • †Bernissartia
  • †
    • †
  • †Borealosuchus
    • †Borealosuchus sternbergii
  • †
    • †
  • †
    • †
  • Brachaelurus
    • †
  • †Brachyceratops – type locality for genus
    • †Brachyceratops montanensis – type locality for species
  • †Brachychampsa – type locality for genus
    • †Brachychampsa montana – type locality for species
    • †
  • Fossilized natural mummy of the Late Cretaceous duck-billed dinosaur Brachylophosaurus
    †Brachylophosaurus
    • †Brachylophosaurus canadensis – type locality for species
  • † – type locality for genus
    • † – type locality for species

C[]

  • Life restoration of a herd of the Late Jurassic sauropod dinosaur Camarasaurus
    †Camarasaurus
  • Campeloma
  • †
    • †
    • †
  • Carcharias
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †Cedrobaena
    • †
  • † – or unidentified comparable form
  • Life restoration of the Late Cretaceous horned dinosaur Centrosaurus
    †Centrosaurus
  • †Cerasinops – type locality for genus
    • †Cerasinops hodgskissi – type locality for species
  • †Ceratodus
    • †
    • †Ceratodus guentheri – or unidentified comparable form
  • †Ceratops – type locality for genus
    • †Ceratops montanus – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • †Chamops
    • †
  • †Champsosaurus
    • †
  • Life restoration of the Late Cretaceous horned dinosaur Chasmosaurus
    †Chasmosaurus – or unidentified comparable form
  • Chiloscyllium
    • † – type locality for species
  • †Chirostenotes
    • †Chirostenotes elegans
  • Chlamys
  • †Chondroceras
    • † – or unidentified comparable form
    • †
  • †Cimexomys
    • †Cimexomys minor
  • †Cimolestes
    • †Cimolestes incisus
    • †Cimolestes stirtoni
  • †Cimoliasaurus
  • †Cimolodon
    • †Cimolodon nitidus
  • Life restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys
    †Cimolomys
    • †Cimolomys clarki – type locality for species
    • †Cimolomys gracilis
  • †Cimolopteryx
    • †Cimolopteryx maxima
  • †
  • 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
  • Life restoration of the Late Cretaceous mosasaurid Clidastes
    †Clidastes
  • †Clioscaphites
    • †
  • †Cobbanites
  • †
  • †
    • †
  • †Componocancer
    • †Componocancer roberti
  • †Compsemys
    • †Compsemys victa
  • †Coniophis
    • †
  • †Coniopteris
    • † – or unidentified comparable form
    • †
    • †
  • †Continuoolithus
    • †
  • † – type locality for genus
    • † – type locality for species
  • †Coriops
    • †Coriops amnicolus
  • †
    • † – type locality for species
  • Mounted fossilized skeleton of the Late Cretaceous duck-billed dinosaur Corythosaurus
    †Corythosaurus
    • †Corythosaurus casuarius
  • Crassatella
  • †Cremnoceramus
    • †
  • †Cretolamna
    • †Cretolamna appendiculata
  • †Cretorectolobus – type locality for genus
    • †Cretorectolobus olsoni – type locality for species
  • †Crocodilus
    • †
  • †
    • †
  • Cucullaea
    • †
    • †
  • †
    • †
  • †
  • †
    • †
  • †
    • †

D[]

  • †Daspletosaurus
    • †Daspletosaurus horneri – type locality for species
  • †Deinodon – type locality for genus
    • †Deinodon horridus – type locality for species
  • Life restoration of the Early Cretaceous dromaeosaur ("raptor") Deinonychus
    †Deinonychus – type locality for genus
  • †Deinosuchus – type locality for genus
    • †Deinosuchus rugosus – type locality for species
  • †
    • † – type locality for species
    • †
    • † – type locality for species
  • Dentalium
  • †Derrisemys
    • †
  • †Diclonius
  • †
  • Mounted fossilized skeleton of the Late Cretaceous marsupial relative Didelphodon
    †Didelphodon
    • †
  • †Didymoceras
  • †
    • †
  • Life restoration of the Late Jurassic long-necked dinosaur Diplodocus
    †Diplodocus
  • †Doratodon – or unidentified comparable form
  • †Dromaeosaurus
    • †Dromaeosaurus albertensis
  • † – report made of unidentified related form or using admittedly obsolete nomenclature
    • †
  • †
    • †
    • † – type locality for species
    • †
  • †
    • †
  • Illustration of the fossilized pelvis and tail of the Late Cretaceous armored dinosaur Dyoplosaurus
    †Dyoplosaurus
    • †Dyoplosaurus acutosquameus

E[]

  • †
  • †
    • † – type locality for species
  • †
    • † – type locality for species
  • †Edgarosaurus
    • †Edgarosaurus muddi
  • †Edmontonia
    • †Edmontonia longiceps
    • †Edmontonia rugosidens – type locality for species
  • †Edmontosaurus
  • †Einiosaurus – type locality for genus
    • †Einiosaurus procurvicornis – type locality for species
  • †
    • † – or unidentified comparable form
  • †Emarginachelys – type locality for genus
    • †Emarginachelys cretacea – type locality for species
  • †
    • †
  • †Eodelphis
  • †Eopelobates – or unidentified comparable form
  • A living Equisetum, or horsetail
    †Equisetum
    • † – type locality for species
    • †
    • †
  • †
    • †
  • †Essonodon – type locality for genus
    • †Essonodon browni – type locality for species
  • †
    • †
  • †Eucrossorhinus
    • † – type locality for species
  • †
    • † – type locality for species
    • † – or unidentified comparable form
    • †
  • †Euomphaloceras
    • †
  • Life restoration of the Late Cretaceous armored dinosaur Euoplocephalus
    †Euoplocephalus
    • †Euoplocephalus tutus
  • †Eutrephoceras
    • † – type locality for species
  • †Exiteloceras
    • †
  • †Exogyra
    • †
  • †
    • †

F[]

  • †
    • †
  • Ficus – or unidentified comparable form
    • †
  • † – report made of unidentified related form or using admittedly obsolete nomenclature
    • †
  • †
    • †

G[]

  • †
  • †Gervillia
    • † – or unidentified comparable form
  • †Gilmoremys
    • †Gilmoremys lancensis
  • Fossilized leaf of the Permian-modern tree Ginkgo
    Ginkgo
    • †
  • †Ginkgoites
    • †
    • †
  • †
    • † – type locality for species
  • †Glishades – type locality for genus
    • †Glishades ericksoni – type locality for species
  • †Glyptops
    • † – type locality for species
  • Glyptostrobus – or unidentified comparable form
  • Mounted fossilized skeleton of the Middle Jurassic-Late Cretaceous mammal Gobiconodon
    †Gobiconodon – type locality for genus
    • †Gobiconodon ostromi – type locality for species
  • †Goniobasis
    • †
  • †Gorgosaurus
    • †Gorgosaurus libratus – type locality for species
  • †
  • †
    • †
  • Interior and exterior of a fossilized shell of the Late Triassic-Eocene marine bivalve Gryphaea
    †Gryphaea
    • † – informal
    • †Gryphaea impressimarginata
  • †Gryposaurus
    • †Gryposaurus latidens – type locality for species
    • †Gryposaurus notabilis
  • †Gypsonictops
    • †
    • †
    • † – type locality for species
    • †

H[]

  • †Habrosaurus
    • †Habrosaurus dilatus
  • †Hadrosaurus
    • †Hadrosaurus breviceps – type locality for species
    • †Hadrosaurus paucidens – type locality for species
  • †Hamites
    • †
  • †
    • †
  • †
    • †
    • †
  • †
    • †
  • Life restoration of the Late Cretaceous toothed bird Hesperornis
    †Hesperornis
    • † – type locality for species
  • † – tentative report
  • †
  • †Hoploscaphites[1]
    • † – type locality for species[1]
  • †
    • †
    • † – type locality for species
  • †Hybodus
    • †Hybodus montanensis – type locality for species
    • † – type locality for species
  • †Hypacrosaurus
    • †Hypacrosaurus stebingeri – type locality for species
  • †
    • † – type locality for species

I[]

  • †
    • † – type locality for species
    • † – type locality for species
  • Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus 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
  • †
    • †
  • Fossilized skeleton of the Middle Jurassic-Miocene Chimaera relative Ischyodus
    †Ischyodus
    • †Ischyodus bifurcatus
  • †Ischyrhiza
    • †Ischyrhiza avonicola
    • †Ischyrhiza mira
  • † – or unidentified comparable form
    • †

J[]

  • Life restoration of the Late Cretaceous horned dinosaur Judiceratops
    †Judiceratops – type locality for genus
    • †Judiceratops tigris – type locality for species
  • †
    • †

K[]

  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • Life restoration of the Late Cretaceous duck-billed dinosaur Kritosaurus
    †Kritosaurus
    • † – or unidentified comparable form
  • †Krokolithes

L[]

  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • Fossilized skeleton of the Early Jurassic-Late Cretaceous bony fish Lepidotes
    †Lepidotes
    • †Lepidotes haydeni – type locality for species
    • †Lepidotes occidentalis – type locality for species
  • † – report made of unidentified related form or using admittedly obsolete nomenclature
    • †
  • Lepisosteus
    • †
  • †Leptalestes
    • †Leptalestes cooki
    • †Leptalestes krejcii
    • †Leptalestes prokrejcii
    • †Leptalestes toevsi – type locality for species
  • Life restoration of the Late Cretaceous primitive horned dinosaur Leptoceratops
    †Leptoceratops
    • †Leptoceratops gracilis
  • †
    • †
  • †
    • †
  • †
    • †
  • †Leptorhynchos – tentative report
  • † – type locality for genus
    • † – type locality for species
  • †
  • †Lingula
  • †
    • †
  • †
    • †
    • †
  • †Liostrea
    • †
  • †Lisserpeton – type locality for genus
    • †Lisserpeton atlantes
    • †Lisserpeton bairdi – type locality for species
  • †Lonchidion
    • †
  • Fossilized shell of the Triassic-modern marine bivalve Lopha
    Lopha
  • †Lucina
  • Lunatia
    • † – or unidentified comparable form
  • † – type locality for genus
    • † – type locality for species

M[]

  • †
    • †
  • †Magnuviator – type locality for genus
    • † – type locality for species
  • †Maiasaura – type locality for genus
    • †Maiasaura peeblesorum – type locality for species
  • †
    • †
  • †
    • †
  • †Medusaceratops – type locality for genus
    • †Medusaceratops lokii – type locality for species
  • †
    • †
  • †Melvius – type locality for genus
    • † – type locality for species
  • †Meniscoessus
    • †Meniscoessus major
    • †Meniscoessus robustus – type locality for species
  • †
    • †
  • Life restoration of the Late Cretaceous horned dinosaur Mercuriceratops
    †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
    • † – type locality for species
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • Life restoration of the Early Cretaceous oviraptorosaur Microvenator
    †Microvenator – type locality for genus
    • †Microvenator celer – type locality for species
  • †
    • †
  • †
  • †Modiolus
    • †
  • †Monoclonius – type locality for genus
    • †Monoclonius crassus – type locality for species
    • †Monoclonius recurvicornis – type locality for species
    • †Monoclonius sphenocerus – type locality for species
  • †
    • †
  • †Montanalestes
    • †
  • Mounted fossilized skeletons of the Late Cretaceous pterosaur Montanazhdarcho
    †Montanazhdarcho – type locality for genus
    • †Montanazhdarcho minor – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †Montanoceratops
    • †Montanoceratops cerorhynchus – type locality for species
  • †Montanoolithus – type locality for genus
    • † – type locality for species
  • †
    • †
    • † – type locality for species
    • †
  • †Mosasaurus
    • †Mosasaurus missouriensis
  • †
    • †
  • †Myledaphus
    • †Myledaphus bipartitus
  • Shells washed ashore of Mytilus mussels
    †Mytilus

N[]

  • †
    • † – type locality for species
  • Fossilized skull of the Late Cretaceous tyrannosaur Nanotyrannus, possibly a juvenile Tyrannosaurus rather than a distinct genus
    †Nanotyrannus
    • †Nanotyrannus lancensis – type locality for species
  • †Naomichelys – type locality for genus
    • † – type locality for species
  • †
  • †Nelumbo
    • † – type locality for species
  • †Neocardioceras
    • †Neocardioceras juddii
    • †Neocardioceras minutum
  • †
    • †
  • †Neoplagiaulax
    • †Neoplagiaulax burgessi – type locality for species
  • †
  • †Neurankylus – type locality for genus
    • † – type locality for species
  • †Nezpercius – type locality for genus
    • † – type locality for species
  • †Nidimys – type locality for genus
    • † – type locality for species
  • †
    • † – or unidentified comparable form
  • †Normannites – tentative report
    • † – or unidentified comparable form
  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species
  • Fossilized skeleton of the Late Cretaceous-Eocene bony fish Notogoneus
    †Notogoneus
    • † – type locality for species
    • † – type locality for species
  • Nucula
  • †

O[]

  • †Obamadon – type locality for genus
    • †Obamadon gracilis – type locality for species
  • †Odaxosaurus
    • †Odaxosaurus piger
  • Odontaspis
    • †Odontaspis sanguinei – type locality for species
  • †Oklatheridium
    • † – type locality for species
  • †Onchosaurus
    • †
  • Fossilized partial cranium of the Late Cretaceous armored dinosaur Oohkotokia
    †Oohkotokia – type locality for genus
    • †Oohkotokia horneri – type locality for species
  • †
    • †
  • †Ophiomorpha
  • †Opisthotriton
    • †
  • †
  • †Ornithomimus
    • †Ornithomimus grandis – type locality for species
    • †Ornithomimus tenuis – type locality for species
  • †Orodromeus – type locality for genus
    • †Orodromeus makelai – type locality for species
  • Life restoration of the Late Cretaceous herbivorous dinosaur Oryctodromeus in a burrow
    †Oryctodromeus – type locality for genus
    • †Oryctodromeus cubicularis – type locality for species
  • Ostrea
  • †
    • †
  • †Oxytoma
    • †

P[]

  • Life restoration of subadults of the Late Cretaceous dome-headed dinosaur Pachycephalosaurus butting heads
    †Pachycephalosaurus – type locality for genus
    • †Pachycephalosaurus wyomingensis – type locality for species
  • †Pagiophyllum
  • †Palaeobatrachus
    • †
  • †
    • †
  • †Palaeosaniwa
    • †Palaeosaniwa canadensis
  • †Palaeoscincus – type locality for genus
    • †Palaeoscincus costatus – type locality for species
  • †Palatobaena
    • †
  • †Paleopsephurus – type locality for genus
    • †Paleopsephurus wilsoni – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • Illustration of a fossilized skull of the Late Cretaceous armored dinosaur Panoplosaurus
    †Panoplosaurus
  • †Pappotherium
    • †
  • †
    • †
    • †
  • †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
  • †
    • †
  • †Paralbula
    • †
  • †Paramacellodus – or unidentified comparable form
    • † – type locality for species
  • †Paranecturus – type locality for genus
    • †Paranecturus garbanii – type locality for species
  • †
    • †
  • Fossilized shell of the Late Cretaceous ammonoid cephalopod Parapuzosia with a human indicating its size
    †Parapuzosia
  • †
    • †
  • †
  • † – type locality for genus
    • † – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †Paronychodon
    • †Paronychodon lacustris
  • Micrograph of a fossilized tooth of the Late Cretaceous troodontid Pectinodon
    †Pectinodon – or unidentified comparable form
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • †
    • †
  • †
    • †
  • †
  • Pholadomya
    • †
    • †Pholadomya kingi
  • Shells in differing orientations of Physa freshwater bladder snails
    Physa
    • † – or unidentified comparable form
  • †Piceoerpeton
    • † – type locality for species
  • †Piksi – type locality for genus
    • †Piksi barbarulna – type locality for species
  • †Pinna
    • †
  • †Pistia
    • †
  • †
  • †
    • †
  • †
    • †
  • †
  • †
    • †
  • †
    • †
  • †
  • †
    • †
  • †
    • †
  • †Plesiobaena
    • †
  • †
    • † – or unidentified comparable form
    • †
  • †Pleuronautilus
  • † – tentative report
  • †
    • †
  • †Podozamites
    • †
  • †
    • †
  • Mounted fossilized skeleton of the Late Cretaceous primitive horned dinosaur Prenoceratops
    †Prenoceratops – type locality for genus
    • †Prenoceratops pieganensis – type locality for species
  • †Prismatoolithus
    • † – type locality for species
    • †
  • †
    • †
  • †Proamphiuma
    • †
  • †
  • †Prodesmodon
    • †
  • †
    • † – type locality for species
  • Mounted fossilized skeleton of the Late Cretaceous duck-billed dinosaur Prosaurolophus
    †Prosaurolophus
    • †Prosaurolophus blackfeetensis – type locality for species
  • †Protalphadon
    • † – type locality for species
    • †
  • †
  • †Protocaiman
  • †Protocardia
    • †
  • †
    • † – type locality for species
  • †Protolamna
    • †
  • †
    • †
  • † – or unidentified comparable form
  • † – type locality for genus
    • † – type locality for species
  • †Protoscaphirhynchus – type locality for genus
    • † – type locality for species
  • Fossilized mandible of the Late Cretaceous-Paleocene mammal Protungulatum
    †Protungulatum
    • † – type locality for species
    • †
  • †
    • † – type locality for species
  • †
    • † – type locality for species
  • †
  • †Pseudomelania
    • †
  • †Pteria – tentative report
    • † – or unidentified comparable form
  • †Pteropelyx – type locality for genus
    • †Pteropelyx grallipes – type locality for species
  • †Ptychotrygon
    • †Ptychotrygon blainensis – type locality for species
    • †
    • †Ptychotrygon triangularis
  • Assemblage of fossilized shells of the Cretaceous-Pleistocene oyster Pycnodonte
    Pycnodonte

Q[]

  • † – tentative report
  • Quercus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †
  • Life restoration of a flock of the Late Cretaceous pterosaur Quetzalcoatlus feeding on the ground
    †Quetzalcoatlus – or unidentified comparable form

R[]

  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • †Rhaeboceras
    • † – type locality for species
    • † – type locality for species
    • †
    • †
    • †
  • †Rhamnus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †
  • †Richardoestesia
    • †Richardoestesia gilmorei
    • †Richardoestesia isosceles
  • † – tentative report
  • Life restoration of the Late Cretaceous horned dinosaur Rubeosaurus
    †Rubeosaurus
    • †Rubeosaurus ovatus – type locality for species
  • †Rugocaudia – type locality for genus
    • †Rugocaudia cooneyi – type locality for species

S[]

  • †Sagenopteris
    • †Sagenopteris elliptica
    • †Sagenopteris mclearni
    • †Sagenopteris williamsii
  • Life restoration of the Early Cretaceous armored dinosaurs Sauropelta
    †Sauropelta – type locality for genus
    • †Sauropelta edwardsorum – type locality for species
  • †Saurornitholestes
    • †Saurornitholestes langstoni
  • †
    • †
  • †Scapherpeton
    • †
  • †Scaphites
    • †Scaphites impendicostatus
    • †
    • †Scaphites preventricosus
    • †Scaphites ventricosus
  • †
    • †
  • †
  • †
    • †
  • †
    • †
  • †
    • †
  • Fossilized cranium in multiple views of the Late Cretaceous armored dinosaur Scolosaurus
    †Scolosaurus
    • †Scolosaurus cutleri
  • †Scotiophryne – type locality for genus
    • † – type locality for species
  • †Sequoia
  • †
    • †
  • †
    • †
  • †
    • †
  • †
    • †
  • Sphaerium
    • †
  • †Sphaerotholus
    • †Sphaerotholus buchholtzae – type locality for species
  • †Sphenopteris
    • †Sphenopteris brulensis
    • †Sphenopteris geopperti
    • †
    • †Sphenopteris latiloba
    • †Sphenopteris mclearni
  • †Spheroolithus
    • †Spheroolithus albertensis
    • †Spheroolithus choteauensis – type locality for species
    • †Spheroolithus maiasauroides
  • Life restoration of the Late Cretaceous horned dinosaur Spiclypeus
    †Spiclypeus – type locality for genus
    • †Spiclypeus shipporum – type locality for species
  • †Spiriferina – report made of unidentified related form or using admittedly obsolete nomenclature
  • †
    • † – type locality for species
  • Squalicorax
    • †Squalicorax kaupi
    • †Squalicorax pristodontus
  • †Squatirhina
    • †Squatirhina americana
  • † – type locality for genus
    • † – type locality for species
  • †Stegoceras
    • †Stegoceras validum
  • Restoration of the Late Jurassic stegosaur Stegosaurus
    †Stegosaurus
  • †
    • † – or unidentified related form
    • †
    • † – or unidentified related form
  • † – type locality for genus
    • † – type locality for species
  • †
  • †Suuwassea – type locality for genus
    • †Suuwassea emilieae – type locality for species
  • †
    • †
  • †Synechodus
    • † – type locality for species
    • † – type locality for species

T[]

  • †
    • † – or unidentified comparable form
  • †
    • †
  • †Tatankacephalus – type locality for genus
    • †Tatankacephalus cooneyorum – type locality for species
  • †
    • †
  • Life restoration of the Early Cretaceous Iguanodon relative Tenontosaurus
    †Tenontosaurus – type locality for genus
    • †Tenontosaurus tilletti – type locality for species
  • †Terminonaris – type locality for genus
    • † – 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
  • †
    • †
  • † – tentative report
  • †
    • † – or unidentified comparable form
  • †Toxolophosaurus – type locality for genus
    • † – type locality for species
  • †Trachodon – type locality for genus
    • †Trachodon altidens
    • †Trachodon marginatus
    • †Trachodon mirabilis – type locality for species
  • †
    • † – informal
  • Mounted fossilized skeleton of the Late Cretaceous horned dinosaur Triceratops
    †Triceratops
  • †Trigonia
    • † – or unidentified comparable form
    • †Trigonia montanaensis
    • † – or unidentified comparable form
  • †
    • †
  • Trionyx
  • †Triprismatoolithus – type locality for genus
    • † – type locality for species
  • †
    • †
  • †
  • Illustration of fossilized teeth of the Late Cretaceous Troodon
    †Troodon – type locality for genus
    • †Troodon formosus – type locality for species
  • †Tubercuoolithus – type locality for genus
    • † – type locality for species
  • †
    • †
  • †
    • †
  • †
    • †
    • †
    • †
  • Turritella
  • †Tylosaurus
    • †Tylosaurus proriger
  • Fossilized skeleton of the Late Cretaceous tyrannosaur Tyrannosaurus
    †Tyrannosaurus – type locality for genus

U[]

  • †Ugrosaurus – type locality for genus
    • †Ugrosaurus olsoni – type locality for species
  • Unio
  • †
    • †

V[]

  • †Valenopsalis
    • †
  • Valvata – tentative report
    • †
  • †
    • †
  • †
  • Vitis – report made of unidentified related form or using admittedly obsolete nomenclature
    • †
  • Viviparus
    • †
  • Life restorations of the Late Cretaceous marine bivalve Volviceramus
    †Volviceramus
    • †
    • †

W[]

  • † – type locality for genus
    • † – type locality for species
  • †
  • †
    • †
  • †Woodwardia – report made of unidentified related form or using admittedly obsolete nomenclature
    • †

X[]

  • †Xenocephalites – tentative report
  • A view of the fossil shell of Xenophora infundibulum
    Xenophora

Y[]

  • †Yezoites
    • †

Z[]

  • Fossil of the Early Triassic-Eocene cycad-like frond Zamites
    †Zamites
    • †Zamites arcticus
  • †Zapsalis – or unidentified comparable form
  • †Zephyrosaurus – type locality for genus
    • †Zephyrosaurus schaffi – type locality for species
  • †
    • †
  • †
    • †

References[]

  1. ^ a b Neil H. Landman; W. James Kennedy; Neal L. Larson; Joyce C. Grier; James W. Grier; Tom Linn (2019). "Description of two species of Hoploscaphites (Ammonoidea, Ancyloceratina) from the Upper Cretaceous (Lower Maastrichtian) of the U.S. Western Interior". Bulletin of the American Museum of Natural History. 427: 1–72. doi:10.1206/0003-0090.427.1.1. hdl:2246/6926.
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