This list of the Mesozoic life of Colorado contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Colorado and are between 252.17 and 66 million years of age.
A[edit]
- †Acanthichnus – tentative report
- Acila
- Acmaea
- †Acmaea genettae – type locality for species
- †Adocus
- †Albanerpeton
- †Albertosaurus – tentative report
- †Aletridelphys
- †Allantodiopsis
- †Allantodiopsis erosa
- †Allantodiopsis JC018 – informal
Life restoration of the Late Jurassic theropod dinosaur Allosaurus - †Allosaurus fragilis – type locality for species
- †Allosaurus lucasi – type locality for species
- †Amblotherium – type locality for genus
- Amia
- †Amphicoelias – type locality for genus
- †Amphicoelias altus – type locality for species
Fossilized skull of the Late Jurassic crocodile relative Amphicotylus - †Amphicotylus lucasii – type locality for species
- †Amplovalvata
- †Anaklinoceras
- †Anaklinoceras minutum – type locality for species
- †Anaklinoceras reflexum
- †Anisoceras
- †Anisomyon
- †Anomia
Fossil (right) of the Early Jurassic dinosaur footprint ichnogenus Anomoepus - †Apateodus
- †Apatopus
- †Apatosaurus – type locality for genus
- †Apatosaurus ajax – type locality for species
- †Apatosaurus laticollis – type locality for species. Junior synonym of A. louisae.
- †Apatosaurus louisae
- †Arcellites
- †Archaeolamna
- †Arenicolites
- Aspideretes
- †Aspideretes vagans – type locality for species
- †Aspideretoides
- Astarte
- †Atlantosaurus
- †Atlantosaurus immanis – type locality for species
- †Axonoceras
B[edit]
- †Baculites
- †Baculites aquilaensis
- †Baculites asper
- †Baculites clinolobatus – type locality for species
- †Baculites codyensis
- †Baculites compressus
- †Baculites cuneatus
- †Baculites grandis
- †Baculites haresi
- †Baculites mclearni
- †Baculites meeki – type locality for species
- †Baculites reesidei
Restoration of the Late Jurassic sauropod dinosaur Barosaurus rearing to defend itself against a pair of the theropod Allosaurus - †Basilemys
- †Basilemys sinuosa – or unidentified comparable form
- †Behuninia
- †Bellifusus
- †Bison
- †Bison alticornis – type locality for species
- †Borealosuchus
- †Brachauchenius – or unidentified comparable form
- †Brachiosaurus – type locality for genus
- †Brachiosaurus altithorax – type locality for species
- †Brachychampsa
- †Brachychirotherium
- †Brachyphyllum
- †Brachyphyllum rechtenii – type locality for species
Life restoration of a herd of the Late Jurassic sauropod dinosaur Brontosaurus
C[edit]
- †Calycoceras
Life restoration of a herd of the Late Jurassic sauropod dinosaur Camarasaurus - †Camarasaurus agilis – type locality for species
- †Camarasaurus grandis
- †Camarasaurus lewisi
- †Camarasaurus supremus – type locality for species
- †Camptosaurus – type locality for genus
- †Camptosaurus dispar – type locality for species
- Carcharias
- †Caririchnium
- †Caririchnium leonardii – type locality for species
- †Caririchnium leonaridii
- †Cataceramus
- †Cedrobaena
- †Ceratodus – type locality for genus
- †Ceratodus felchi – type locality for species
- †Ceratodus guentheri – type locality for species
Restoration of the Late Jurassic ceratosaur Ceratosaurus - †Ceratosaurus nasicornis – type locality for species
- Cerithiopsis
- †Champsosaurus
- Chara
- †Chelonipus
- †Chinlea
- †Chinlestegophis – type locality for genus
- †Chinlestegophis jenkinsi – type locality for species
- †Chirotherium
- †Cimolichthys
- †Cimolodon – or unidentified comparable form
Life restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys - †Cionichthys
- †Cionodon – type locality for genus
- †Cionodon arctatus – type locality for species
- †Cirroceras
- †Cladoceramus
- †Clidastes
- †Clioscaphites
- †Coahuilites
- †Cochlichnus
- †Codellaster – type locality for genus
- †Codellaster keepersae – type locality for species
- †Coelophysis – tentative report
Diagram illustrating the known fossil material of the Late Jurassic theropod dinosaur Coelurus - †Compsemys
- †Coniasaurus
- Corbula
- †Corydalites – type locality for genus
- †Corydalites fecundum – type locality for species
- Crassatella
- †Cremnoceramus
- †Crenella
- †Creonella
- †Cretodus
- †Cretolamna
- †Cretomanta
Restoration of the Late Cretaceous shark Cretoxyrhina, or the Ginsu shark - Cucullaea
- Cuspidaria
- †Czekanowskia
- †Czekanowskia turneri – tentative report
D[edit]
- †Diablophis
- †Diablophis gilmorei – type locality for species
- †Didymoceras
- †Didymoceras aurarium – type locality for species
- †Didymoceras cheyennense
- †Didymoceras draconis
- †Didymoceras stevensoni
- †Dinehichnus
- †Dinochelys
Diagram illustrating the Late Jurassic sauropod dinosaurs Diplodocus carnegii (green) and D. hallorum (orange) with an anachronistic human to scale. - †Diplodocus lacustris – type locality for species
- †Diplodocus longus – type locality for species
- Diplodonta
- †Diplosaurus
- †Diplosaurus felix – type locality for species
- Discinisca
- †Discoscaphites
- †Docodon
- †Docodon apoxys – type locality for species
- †Dorsetisaurus
Fossilized skull of the Late Jurassic-Early Cretaceous turtle Dorsetochelys - †Dorsetochelys buzzops – type locality for species
- †Drepanocheilus
- †Dryophyllum
- †Dryosaurus
E[edit]
- †Edmontonia
Skeletal reconstruction and restored soft tissue of the Late Cretaceous duck-billed dinosaur Edmontosaurus regalis with an anachronistic human to scale - †Edmontosaurus regalis – type locality for species
- Eilenodon – type locality for genus
- †Eilenodon robustus – type locality for species
- †Elopopsis
- †Enchodus
- †Enchodus gladiolus – or unidentified comparable form
- †Enchodus shumardi – or unidentified comparable form
- †Entolium
- †Eoacteon
- †Eomunidopsis
- †Eomunidopsis cobbani – type locality for species
- †Eosauropus
A living Equisetum, or horsetail - †Equisetum burchardtii – or unidentified comparable form
- †Etea
- †Eubrontes
- †Eucalycoceras
- †Euomphaloceras
- †Eutrephoceras
- †Eutretauranosuchus – type locality for genus
- †Eutretauranosuchus delfsi – type locality for species
- †Exiteloceras
- †Exogyra
- †Exogyra boveyensis – or unidentified related form
F[edit]
Fossilized shell of the Late Cretaceous ammonoid cephalopod Fagesia - Ficus
- †Forresteria
- †Forresteria hobsoni – type locality for species
- †Fruitachampsa – type locality for genus
- †Fruitachampsa callisoni – type locality for species
- †Fruitadens – type locality for genus
- †Fruitadens haagarorum – type locality for species
- †Fruitafossor – type locality for genus
- †Fruitafossor windscheffeli – type locality for species
G[edit]
Fossilized skull of the Late Jurassic sauropod dinosaur Galeamopus - †Glirodon
- †Glyptops
- †Glyptops plicatulus – type locality for species
- †Goniopholis
- †Goniopholis felchi – type locality for species
- †Grallator
- †Gryphaeostrea
- †Gwyneddichnium
- †Gypsonictops
- †Gyroides
H[edit]
Restoration of the Late Jurassic crocodile relative Hallopus - †Hallopus victor – type locality for species
- †Haplocanthosaurus – type locality for genus
- †Haplocanthosaurus delfsi – type locality for species
- †Haplocanthosaurus priscus – type locality for species
- †Harduinia
- †Haresiceras
- †Helopanoplia
- †Helopanoplia distincta – or unidentified comparable form
- †Hemicalypterus
- †Hermanophyton
Fossilized shell of the Late Cretaceous ammonoid cephalopod Herrickiceras - †Holaster
- †Holaster feralis – type locality for species
- †Homolopsis
- †Hoploscaphites[1]
- †Hulettia – report made of unidentified related form or using admittedly obsolete nomenclature
- †Hulettia hawesi – type locality for species
- †Hypsirophus – type locality for genus
- †Hypsirophus discurus – type locality for species
I[edit]
- †Ichthyodectes
- †Ignotornis – type locality for genus
- †Ignotornis mcconnelli – type locality for species
Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size - †Inoceramus altus
- †Inoceramus altusiformis
- †Inoceramus anomalus
- †Inoceramus arnoldi
- †Inoceramus balticus
- †Inoceramus brancoiformis
- †Inoceramus bueltenensis
- †Inoceramus cordiformis
- †Inoceramus crippsi – or unidentified related form
- †Inoceramus deformis
- †Inoceramus erectus
- †Inoceramus flavus
- †Inoceramus grandis
- †Inoceramus longealatus
- †Inoceramus muelleri - or unidentified loosely related form
- †Inoceramus oblongus
- †Inoceramus pictus
- †Inoceramus prefragilis
- †Inoceramus rutherfordi – or unidentified comparable form
- †Inoceramus tenuistriatus – tentative report
- †Ischyrhiza
- †Ischyrhiza avonicola – or unidentified comparable form
J[edit]
Fossilized shell of the Late Cretaceous ammonoid cephalopod Jeletzkytes - †Jensensispermum
- Jupiteria
K[edit]
- †Kepodactylus – type locality for genus
- †Kepodactylus insperatus – type locality for species
L[edit]
- †Laosaurus – report made of unidentified related form or using admittedly obsolete nomenclature
- Laternula
- Lepisosteus – tentative report
- †Leptalestes – tentative report
Restoration of a school of the Middle Triassic-Early Cretaceous bony fish Leptolepis - †Lewyites
- Lima
- †Lima janetae – type locality for species
- †Lingula
- †Lioestheria
- †Lioestheria tendagurensis – or unidentified comparable form
- †Lisserpeton
- †Lonchidion
- †Lucina
- †Lyropecten
M[edit]
Diagram illustrating the known fossil material of two specimens of the Late Jurassic crocodile relative Macelognathus - †Magadiceramus
- †Magadiceramus complicatus
- †Magadiceramus crenelatus
- †Magadiceramus soukupi - or unidentified loosely related form
- †Magadiceramus subquadratus
- †Magnoavipes
- †Magnoavipes caneeri – type locality for species
- †Marmarthia – or unidentified comparable form
- †Marshosaurus – or unidentified comparable form
Fossilized skull of the Late Cretaceous multituberculate mammal Meniscoessus - †Meniscoessus collomensis – type locality for species
- †Meniscoessus conquistus
- †Meniscoessus robustus – or unidentified comparable form
- †Mesadactylus – type locality for genus
- †Mesadactylus ornithosphyos – type locality for species
- †Mesembrioxylon
- †Mesembrioxylon carterii – type locality for species
- †Mesodma
- †Mesodma formosa – or unidentified comparable form
- †Mesojassoides – type locality for genus
- †Mesojassoides gigantea – type locality for species
- †Mesolanistes
- †Metengonoceras
- †Metoicoceras
- †Micrabacia
- †Micropycnodon
- †Modiolus
- †Modiolus kremmlingensis – type locality for species
- †Modiolus meeki
- †Moremanoceras
- †Morosaurus
- †Morosaurus laticollis – type locality for species
- †Morrolepis
- †Morrolepis schaefferi – type locality for species
- †Myledaphus
Mounted fossilized skeleton of the Late Jurassic armored dinosaur Mymoorapelta - †Mymoorapelta maysi – type locality for species
- Myrica
- †Mytiloides
- †Mytiloides duplicostatus – or unidentified related form
- †Mytiloides latus – or unidentified comparable form
- †Mytiloides mytiloides
- †Mytiloides opalensis
- †Mytiloides stantoni – or unidentified comparable form
- †Mytiloides submytiloides – or unidentified related form
N[edit]
- †Nanosaurus – type locality for genus
- †Nanosaurus agilis – type locality for species
- †Nanosaurus rex
Multiple views of a fossilized shell belonging to a Natica moon snail - †Nemodon
- †Nemodon adkinsi
- †Nemodon harriesi – type locality for species
- †Neocardioceras
- †Neocardioceras densicostatum – type locality for species
- †Neocardioceras juddii
- †Neocardioceras laevigatum
- †Neocardioceras minutum
- †Neocardioceras uptonense
- †Neocrioceras
- †Neoptychites
- †Neurankylus
- †Nigericeras
- †Nigericeras scotti – type locality for species
- †Nonactaeonina
- †Nortedelphys
Restoration of several species of the Late Cretaceous ammonoid cephalopod Nostoceras - †Nostoceras approximans – or unidentified comparable form
- †Nostoceras larimerense – type locality for species
- †Nostoceras monotuberculatum
- †Nostoceras obtusum – or unidentified comparable form
- †Nostoceras splendidum – or unidentified comparable form
- Nucula
- Nuculana
- †Nymphalucina
- †Nymphalucina bourni – type locality for species
- †Nymphalucina cleburni
O[edit]
- †Octopodichnus
- †Odaxosaurus
- †Oligoptycha
- †Opertochasma
- †Opisthias
- †Opisthotriton
- †Ornitholestes – tentative report
- †Ornithomimipus
- †Ornithomimipus angustus – or unidentified comparable form
Fossilized skeleton of the Late Cretaceous ostrich dinosaur Ornithomimus - †Ornithomimus velox – type locality for species
- Ostrea
- †Othnielia – tentative report
- †Othnielosaurus
- †Oxybeloceras
- †Oxytoma
P[edit]
Fossilized skull of the Late Cretaceous dome-headed dinosaur Pachycephalosaurus - †Pachyrhizodus
- †Palaeobalistum
- †Palaeopteryx – type locality for genus
- †Paleonelumbo
- †Parabrontopodus – type locality for genus
- †Parabrontopodus mcintoshi – type locality for species
- †Parallelodon
- †Paramacellodus
- †Parapleurites
- †Parapleurites morrisonensis – type locality for species
- †Paressonodon – type locality for genus
- †Paressonodon nelsoni – type locality for species
- †Parikimys – type locality for genus
- †Parikimys carpenteri – type locality for species
- †Parviraptor
Life restoration of the Late Cretaceous horned dinosaur Pentaceratops - †Pentasauropus
- †Petropteron – type locality for genus
- †Petropteron mirandum – type locality for species
- †Phelopteria
- †Phelopteria linguaeformis
- †Phelopteria ruppii – type locality for species
- †Phlycticrioceras
- †Pinna
- †Placenticeras
- †Plastomenus – tentative report
- †Plastomenus insignis – type locality for species
- †Plastomenus punctulatus – type locality for species
- †Platanites
Fossilized shell of the Cretaceous marine bivalve Platyceramus - †Platyceramus ahsenensis
- †Platyceramus cycloides
- †Platyceramus mantelli - or unidentified loosely related form
- †Platyceramus platinus
- †Platyognathus
- †Plesiobaena
- †Plesiobaena antiqua – or unidentified comparable form
- †Polyonax – type locality for genus
- †Polyonax mortuarius – type locality for species
- †Preprismatoolithus
- †Priacodon
- †Priacodon fruitaensis – type locality for species
- †Prionocyclus
- †Probaena
- †Probaena sculpta – type locality for species
Fossilized skull of the Late Cretaceous mosasaur Prognathodon - †Prognathodon overtoni
- †Prognathodon stadtmani – type locality for species
- Propeamussium
- †Protalphadon
- †Protexanites
- †Protocardia
- †Protocardia barneyi – type locality for species
- †Protocupressinoxylon
- †Protocupressinoxylon medlynii – type locality for species
Life restoration of the Late Cretaceous bony fish Protosphyraena - Prunus
- †Pseudaspidoceras
- †Pseudobaculites
- †Pseudocalycoceras
- †Pseudoisurus
- †Pseudoisurus tomosus – or unidentified comparable form
- †Pseudoperna
- †Pseudoperna bentonensis
- †Pseudoperna congesta
- †Pseudoperna inflatum – type locality for species
- †Pseudotetrasauropus – tentative report
- †Pteraichnus
- †Ptychodus
- †Puebloites
- Pycnodonte
R[edit]
- †Rhaeboceras
- †Rhaeboceras coloradoense – type locality for species
- †Rhaeboceras halli
- †Rhaeboceras subglobosum
A living Rhinobatos guitar fish - †Rhynchosauroides
- †Rosselia
- †Rotodactylus
S[edit]
- †Sabalites
- †Sabalites JC016 – informal
- †Sabalites LA042 – informal
- †Saurillodon
- †Scapherpeton
Fossilized shell of the Late Cretaceous ammonoid cephalopod Scaphites - †Scaphites binneyi
- †Scaphites depressus
- †Scaphites hippocrepis – or unidentified comparable form
- †Scaphites nodosus
- †Schadipes – type locality for genus
- †Schadipes crypticus – type locality for species
- †Sciponoceras
- †Scoyenia
- †Selaginella
- †Selaginella JC023 – informal
Fossilized skeleton of the Late Triassic-Early Jurassic bony fish Semionotus - †Solenoceras
- †Solenoceras larimerense
- †Solenoceras reesidei – or unidentified comparable form
- †Solenoceras texanum
- †Sphenodiscus
- †Spiroxybeloceras
- Squalicorax
- †Squatirhina
Restoration of the Late Jurassic stegosaur Stegosaurus - †Stegosaurus armatus – type locality for species
- †Stegosaurus stenops – type locality for species
- †Stegosaurus ungulatus
- †Steinerocaulis
- †Stenomyti – type locality for genus
- †Stenomyti huangae – type locality for species
- †Stokesosaurus – or unidentified comparable form
- †Stramentum
- Sulcoretusa
- †Sulcoretusa dominici – type locality for species
- †Sumitomoceras
Restoration in multiple views of the Late Jurassic sauropod dinosaur Supersaurus with an anachronistic human to scale - †Supersaurus vivianae – type locality for species
- †Syncyclonema
- †Synorichthys – type locality for genus
- †Synorichthys stewarti – type locality for species
T[edit]
- †Tanaocrossus – type locality for genus
- †Tanaocrossus kalliokoskii – type locality for species
- †Tanocrossus
- Tellina
- †Tenea
- Teredo
- †Texanites
Fossilized skeleton of the Late Cretaceous plesiosaur Thalassomedon - †Thalassomedon hanningtoni – type locality for species
- †Theiophytalia – type locality for genus
- †Theiophytalia kerri – type locality for species
- †Therangospodus – or unidentified comparable form
- †Thescelosaurus
- †Tibiaporrhais
- †Titanosaurus
- †Titanosaurus montanus – type locality for species
Fossilized skulls of the Late Cretaceous horned dinosaurs Torosaurus (A) and Triceratops (B) to scale - †Torvosaurus – type locality for genus
- †Torvosaurus tanneri – type locality for species
- †Trachybaculites
- †Trachybaculites columna – or unidentified comparable form
- †Treptichnus
- †Triceratops
- †Triceratops galeus – type locality for species
- †Triceratops horridus
- †Trinacromerum – or unidentified comparable form
- Trochocyathus
- †Turbinopsis
- Turritella
- †Turseodus
- †Turseodus dolorensis – type locality for species
- †Tylosaurus
Fossilized skeleton of the Late Cretaceous tyrannosaur Tyrannosaurus
V[edit]
- †Vanikoropsis
Fossilized shell of the Late Cretaceous ammonoid cephalopod Vascoceras - Viviparus
- †Volviceramus
- †Voysa
W[edit]
- †Walteria – type locality for genus
- †Walteria jeffersonensis – type locality for species
- †Walteria jeffersoni – type locality for species
- †Watinoceras
- †Watinoceras coloradoense – type locality for species
- †Websteria
- †Worthoceras
X[edit]
- †Xenoxylon
- †Xenoxylon moorei – type locality for species
Life restoration of the Cretaceous bony fish Xiphactinus
Z[edit]
- †Zyziphus
- †Zyziphus fibrillosus
- †Zyziphus LA007 – informal
- †Zyziphus LA032 – informal
References[edit]
- ^ 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. 2019 (427): 1–72. doi:10.1206/0003-0090.427.1.1. hdl:2246/6926. S2CID 91263199.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
