List of the prehistoric life of Colorado
Appearance
This list of the prehistoric life of Colorado contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Colorado.
Precambrian
The Paleobiology Database records no known occurrences of Precambrian fossils in Colorado.
Paleozoic
Selected Paleozoic taxa of Colorado
- †Actinoceras
- †Aglaocrinus
- †Amorphognathus
- †Amplexus
- †Archaeocidaris
†Astraspis – type locality for genusLife restoration of the Middle-Late Ordovician jawless fish Astraspis - †Astraspis desiderata – type locality for species
- †Athyris
- †Aviculopecten
- †Calamites
- †Callipteris
- †Callipteris lyratifolia – or unidentified comparable form
- †Camarotoechia
- †Caninia
†CateniporaFossil of the Ordovician-Silurian tabulate coral Catenipora - †Ceraurinus
- †Charactoceras – tentative report
- †Chirognathus
- †Composita
- †Conocardium
- †Cordaites
- †Cornulites
- †Crania
- †Ctenacanthus
- †Cupressocrinites
†Cutleria – type locality for genusRestoration of the Permian synapsid (mammal precursor) Cutleria - †Cutleria wilmarthi – type locality for species
- †Cyclopteris
- †Cyrtogomphoceras
- †Cyrtospirifer
- †Echinosphaerites – tentative report
- †Edestus
- †Endoceras
- †Eretmocrinus
†EryopsLife restoration of the Carboniferous-Permian amphibian Eryops - †Euomphalus
- †Girvanella
- †Halysites
- †Isalaux – type locality for genus
- †Isonema
- †Kionoceras
- †Lambeoceras
- †Lepidodendron
- †Lepidostrobus
- †Limnoscelis
- †Lingula
- †Meristella
- †Neospirifer
- †Neuropteris
- †Neuropteris auriculata
- †Neuropteris gigantea – tentative report
- †Neuropteris heterophylla
†OphiacodonRestoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon - †Oradectes
- †Ormoceras
- †Orthoceras
- †Oulodus
- †Paladin – tentative report
- †Pecopteris
- †Plaesiomys
- †Platyceras
†PlatyhystrixLife restoration of the Carboniferous-Permian sail-backed amphibian Platyhystrix - †Pugnax
- †Receptaculites
- †Samaropsis
- †Sandia
- †Seymouria
- †Sigillaria
- †Sigillaria elegans – or unidentified comparable form
- †Sphenophyllum
- †Sphenopteris
- †Spirifer
- Spirorbis
- †Spyroceras
- †Stigmaria
- †Strepsodiscus – type locality for genus
- †Strophomena
- †Syringopora
†TaxocrinusFossil of the Silurian-Carboniferous crinoid ("sea lily") Taxocrinus (right) - †Walchia
- †Westonoceras
Mesozoic
Selected Mesozoic taxa of Colorado
- Acmaea
- †Adocus
- †Albanerpeton
- †Albertosaurus – tentative report
†Allosaurus – type locality for genusLife restoration of the Late Jurassic theropod dinosaur Allosaurus - †Allosaurus fragilis – type locality for species
- †Amblotherium – type locality for genus
- Amia
- †Amphicoelias – type locality for genus
- †Amphicoelias altus – type locality for species
- †Amphicotylus
- †Amphicotylus lucasii – type locality for species
- †Anaklinoceras
- †Anisoceras
- †Anomia
- †Anomoepus – tentative report
- †Apateodus
- †Apatopus
†Apatosaurus – type locality for genusComparison of A. ajax (orange) and A. louisae (red) with a human (blue) and Brontosaurus parvus (green) - †Apatosaurus ajax – type locality for species
- †Apatosaurus louisae – type locality for species
- †Arenicolites
- Aspideretes
- Astarte
- †Atlantosaurus
- †Atlantosaurus immanis – type locality for species
- †Axonoceras
†BaculitesFossilized shell of the Late Cretaceous ammonoid cephalopod 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
- †Barosaurus
†BasilemysFossilized skeleton of the Cretaceous turtle Basilemys - †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
- †Brachyphyllum
†BrontosaurusLife restoration of a herd of the Late Jurassic sauropod dinosaur Brontosaurus - †Calycoceras
- †Camarasaurus – type locality for genus
- †Camarasaurus grandis
- †Camarasaurus lewisi
- †Camarasaurus supremus – type locality for species
- †Camptosaurus – type locality for genus
- †Camptosaurus dispar – type locality for species
- Carcharias
- †Caririchnium
- †Cedrobaena
- †Ceratodus – type locality for genus
†Ceratosaurus – type locality for genusRestoration of the Late Jurassic ceratosaur Ceratosaurus - †Ceratosaurus nasicornis – type locality for species
- Cerithiopsis
- †Champsosaurus
- Chara
- †Chelonipus
- †Chinlea
- †Chirotherium
- †Cimolichthys
- †Cimolodon – or unidentified comparable form
†CimolomysLife restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys - †Cionodon – type locality for genus
- †Cionodon arctatus – type locality for species
- †Cirroceras
- †Clidastes
- †Coelophysis – tentative report
- †Coelurus
- †Compsemys
- †Coniasaurus
- Corbula
- †Crenella
- †Cretolamna
- †Cretoxyrhina
- Cucullaea
- Cuspidaria
- †Didymoceras
- †Dinehichnus
- †Dinochelys
†Diplodocus – type locality for genusDiagram 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
- †Diplosaurus
- Discinisca
- †Discoscaphites
- †Docodon
- †Dorsetisaurus
- †Dorsetochelys
- †Dryosaurus
- †Edmontonia
†EdmontosaurusSkeletal 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
- †Elopopsis
- †Enchodus
- †Enchodus gladiolus – or unidentified comparable form
- †Enchodus shumardi – or unidentified comparable form
- †Equisetum
- †Eubrontes
- †Eucalycoceras
- †Euomphaloceras
- †Eutrephoceras
- †Eutretauranosuchus – type locality for genus
- †Eutretauranosuchus delfsi – type locality for species
- †Exiteloceras
- †Exogyra
†FagesiaFossilized shell of the Late Cretaceous ammonoid cephalopod Fagesia - Ficus
- †Forresteria
- †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
- †Galeamopus
- †Glirodon
- †Glyptops
†GoniopholisRestoration of the Late Jurassic-Early Cretaceous crocodile relative Goniopholis - †Grallator
- †Hallopus
- †Hallopus victor – type locality for species
- †Haplocanthosaurus – type locality for genus
- †Haplocanthosaurus delfsi – type locality for species
- †Haplocanthosaurus priscus – type locality for species
- †Hemicalypterus
- †Herrickiceras
- †Hoploscaphites
- †Hulettia – report made of unidentified related form or using admittedly obsolete nomenclature
- †Hypsirophus – type locality for genus
- †Ichthyodectes
- †Ignotornis – type locality for genus
†InoceramusFossilized 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
†JeletzkytesFossilized shell of the Late Cretaceous ammonoid cephalopod Jeletzkytes - †Kepodactylus – type locality for genus
- †Kepodactylus insperatus – type locality for species
- †Laosaurus – report made of unidentified related form or using admittedly obsolete nomenclature
- Lepisosteus – tentative report
- †Leptalestes – tentative report
- †Leptolepis – or unidentified comparable form
- Lima
- †Lingula
- †Lioestheria
- †Lisserpeton
- †Lonchidion
- †Lucina
- †Macelognathus
- †Magnoavipes
- †Marshosaurus – or unidentified comparable form
†MeniscoessusFossilized skull of the Late Cretaceous multituberculate mammal Meniscoessus - †Meniscoessus collomensis – type locality for species
- †Meniscoessus robustus – or unidentified comparable form
- †Mesadactylus – type locality for genus
- †Mesadactylus ornithosphyos – type locality for species
- †Mesodma
- †Mesodma formosa – or unidentified comparable form
- †Mesojassoides – type locality for genus
- †Mesojassoides gigantea – type locality for species
- †Metoicoceras
- †Micropycnodon
- †Modiolus
- †Morosaurus
- †Morrolepis
- †Myledaphus
†Mymoorapelta – type locality for genusFossilized skeleton of the Late Jurassic armored dinosaur Mymoorapelta - †Mymoorapelta maysi – type locality for species
- Myrica
- †Nanosaurus – type locality for genus
- †Nanosaurus agilis – type locality for species
- †Nanosaurus rex
- Natica
- †Neocardioceras
- †Neocardioceras densicostatum – type locality for species
- †Neocardioceras juddii
- †Neocardioceras laevigatum
- †Neocardioceras minutum
- †Neocardioceras uptonense
- †Neoptychites
†NostocerasRestoration 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
- †Odaxosaurus
- †Opisthias
- †Opisthotriton
- †Ornitholestes – tentative report
- †Ornithomimipus
- †Ornithomimus – type locality for genus
- †Ornithomimus velox – type locality for species
- Ostrea
- †Othnielia – tentative report
- †Othnielosaurus
- †Oxytoma
†PachycephalosaurusFossilized skull of the Late Cretaceous dome-headed dinosaur Pachycephalosaurus - †Pachyrhizodus
- †Palaeobalistum
- †Palaeopteryx – type locality for genus
- †Parabrontopodus – type locality for genus
- †Paramacellodus
- †Paressonodon – type locality for genus
- †Parikimys – type locality for genus
- †Parviraptor
- †Pentaceratops
- †Pinna
- †Placenticeras
†PlatyceramusFossilized shell of the Cretaceous marine bivalve Platyceramus - †Platyceramus ahsenensis
- †Platyceramus cycloides
- †Platyceramus mantelli - or unidentified loosely related form
- †Platyceramus platinus
- †Platyognathus
- †Plesiobaena
- †Polyonax – type locality for genus
- †Polyonax mortuarius – type locality for species
- †Preprismatoolithus
- †Priacodon
- †Priacodon fruitaensis – type locality for species
†PrognathodonFossilized skull of the Late Cretaceous mosasaur Prognathodon - †Prognathodon overtoni
- †Prognathodon stadtmani – type locality for species
- Propeamussium
- †Protocardia
- †Protosphyraena
- Prunus
- †Pseudoperna
- †Pseudotetrasauropus – tentative report
- †Pteraichnus
- †Ptychodus
- Pycnodonte
- Rhinobatos
- †Rosselia
- †Saurillodon
- †Scapherpeton
†ScaphitesFossilized shell of the Late Cretaceous ammonoid cephalopod Scaphites - †Scaphites binneyi
- †Scaphites depressus
- †Scaphites hippocrepis – or unidentified comparable form
- †Scaphites nodosus
- †Scoyenia
- †Selaginella
- †Semionotus
- †Sphenodiscus
- Squalicorax
- †Squatirhina
†Stegosaurus – type locality for genusRestoration of the Late Jurassic stegosaur Stegosaurus - †Stegosaurus armatus – type locality for species
- †Stegosaurus stenops – type locality for species
- †Stegosaurus ungulatus
- †Stenomyti – type locality for genus
- †Stenomyti huangae – type locality for species
- †Stokesosaurus – or unidentified comparable form
- †Supersaurus – type locality for genus
- †Supersaurus vivianae – type locality for species
- Tellina
- †Tenea
- Teredo
- †Thalassomedon – type locality for genus
- †Thalassomedon hanningtoni – type locality for species
- †Theiophytalia – type locality for genus
- †Theiophytalia kerri – type locality for species
- †Therangospodus – or unidentified comparable form
- †Thescelosaurus
- †Titanosaurus
- †Titanosaurus montanus – type locality for species
†TorosaurusFossilized 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
- †Treptichnus
- †Triceratops
- †Triceratops galeus – type locality for species
- †Triceratops horridus
- †Trinacromerum – or unidentified comparable form
- Turritella
- †Tylosaurus
†TyrannosaurusFossilized skeleton of the Late Cretaceous tyrannosaur Tyrannosaurus - †Vascoceras
- Viviparus
- †Volviceramus
- †Walteria – type locality for genus
- †Watinoceras
- †Watinoceras coloradoense – type locality for species
- †Websteria
- †Xiphactinus
Cenozoic
Selected Cenozoic taxa of Colorado
AbiesA living Abies, or fir tree - †Absyrtus
- †Acalles
- Abies
- †Absyrtus
- †Acalles
- Acer
- †Acilius
- Acris
- †Acrostichum
- †Adalia
- †Adelopsyche – type locality for genus
- †Adocus
- Aegialia
- †Aelurodon
†AepycamelusLife restoration of the Miocene camel Aepycamelus, or the long-necked camel. Heinrich Harder (1920). - †Aeshna
- Agabus
- †Agallia
- †Agathemera
- Agelaius
- †Agnotocastor
- Agrilus
- Agriotes
- †Agromyza
- †Agulla
- †Agulla protomaculata – type locality for species
†AilanthusFoliage and fruits of an Ailanthus tree - †Aletodon
- Aleurites
- †Alforjas – tentative report
- †Allognathosuchus
- †Allophylus
- Altica
- †Alysia
- Amara
- †Amauropilio
- †Amblycorypha – tentative report
- †Amblyteles
- †Ambystoma
†AmebelodonLife restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932). - Amelanchier
- Amia
- †Ammophila
- †Ampelopsis
- †Amphechinus
- †Amphicerus
- †Amphicyon
†AmphimachairodusFossilized skull of the Miocene saber-toothed cat Amphimachairodus - †Anabrus
- Anas
- †Anasa
- †Anatis
- †Anchitherium
- Andrena
- †Andrias
- †Andricus
- †Anelaphus
- †Anemia
- †Angustidens
- Anisotoma
- †Anobium
- †Anomala
- †Anomalon
- Anser
- †Antas
- Anthaxia
- †Antherophagus
†AnthidiumA living Anthidium, or carder bee - †Anthidium exhumatum – type locality for species
- †Anthidium scudderi – type locality for species
- †Anthomyia
- Anthonomus
- †Anthophora
- Antilocapra
- †Antocha
- Aphaenogaster
- †Aphaenogaster donisthorpei – type locality for species
- †Aphaenogaster mayri – type locality for species
- †Aphelops
- Aphodius
- Aphrophora
- Apion
- †Apolysis
- Aquila
- Araneus
- †Archaeotherium
- †Archimyrmex – type locality for genus
- †Archimyrmex rostratus – type locality for species
- †Archiponera – type locality for genus
- †Archiponera wheeleri – type locality for species
†ArctocyonLife restoration of the Paleocene mammal Arctocyon - †Argia
- †Arhopalus
- †Aristolochia
- †Artocarpus
- †Asimina
- Asio
- †Asplenium
- †Aster
- †Astronium
- Ataenius
- †Athalia
†AthousA living Athous click beetle - †Athyana
- †Attagenus
- †Auraria – type locality for genus
- Aythya
- †Aztlanolagus
- †Baena
- †Baris
†BarylambdaLife restoration of the Paleocene-Eocene pantodont mammal Barylambda - †Bassus
- †Bathornis – type locality for genus
- †Bathornis veredus – type locality for species
- †Bathygenys
- †Bathyopsis
- †Belyta
- Bembidion
- †Bembidium
- †Beris
- Betula
- Bibio
- †Bibiodes
- †Bidessus
- Bison
- †Bison antiquus – or unidentified comparable form
†Bison latifronsMounted fossilized skeleton of the Pleistocene Bison latifrons, or long-horned bison
- †Blechnum
- Bledius
- Boletina
- †Borealosuchus
- †Borophagus
- †Brachinus
- †Brachycrus
- Brachylagus
- †Brachyprotoma
- †Brachypsalis
†BrachyrhynchocyonSkeletal reconstruction of the Eocene-Oligocene bear-dog Brachyrhynchocyon - †Brachyspathus – type locality for genus
- Bracon
- †Bruchus
- Bubo
- Bufo
- †Buprestis
- †Bursera
ButeoA living Buteo hawk - †Caesalpinia
- †Calcarius
- †Calippus
- †Caliroa
- †Callimoxys
- †Callomyia – tentative report
- Calosoma
- †Calyptapis – type locality for genus
- †Calyptapis florissantensis – type locality for species
†CamelopsLife restoration of the Pliocene-Holocene camel Camelops - Camponotus
- Canis
- †Canis edwardii – or unidentified comparable form
- †Canis latrans
- †Cantius
- †Capnobotes
- †Capsus
CarabusA living Carabus ground beetle - †Cardiophorus
- †Cardiospermum
- †Carpocyon
- Carpodacus
- †Carpophilus
- Carya
- Castanea
- †Catopsalis
- †Catopsalis alexanderi – type locality for species
- †Cecidomyia – tentative report
- Cedrela
- †Celastrus
- Celtis
- †Centron – type locality for genus
- †Ceratina
†Ceratosuchus – type locality for genusLife restoration of the Paleocene-Eocene crocodilian Ceratosuchus - †Ceratosuchus burdoshi – type locality for species
- †Ceraturgus
- Cercidiphyllum
- Cercis
- †Cercocarpus
- †Cercopis
- Cervus
- Ceutorhynchus
- Chaetodipus
- †Chalcis
- †Chalybion
- †Chamaecyparis
†ChamaedoreaA stand of living Chamaedorea palms - Charina
- †Chauliognathus
- Cheilosia
- †Chelonus
- †Chilocorus
- †Chionaemopsis – type locality for genus
- Chironomus
- Chondestes
- †Chriacus
- †Chrysis
- †Chrysobothris
- †Chrysogaster
- Chrysomela
- †Cicada
- †Cicadella
- †Cimbex
- †Cimexomys
- †Cimexomys arapahoensis – type locality for species
- †Cimexomys minor
CinnamomumA living Cinnamomum, or cinnamon tree - Cissus
- †Cixius – tentative report
- †Cladius
- †Cladura
- †Clastoptera
- †Cleonus
- †Closterocoris
- †Closterocoris elegans – type locality for species
- †Clubiona
- †Clytus
- †Coccinella
- †Coeliodes
- Colaptes
†Colaptes auratusA living Colaptes auratus, or northern flicker
- †Colaspis
- †Collops
- †Colopterus
- †Colubrina
- †Compsemys
- †Coniatus
- Conotelus
- †Conotrachelus
- †Conzattia
- †Copecion
- †Copelemur
- †Copidita
- Corixa
- †Corizus
- †Cormocyon
- †Cormohipparion
- Cornus
- Corticaria
- Corvus
- †Corylus
†CoryphodonLife restoration of the Paleocene-Eocene pantodont mammal Coryphodon. Heinrich Harder (1920). - Cossonus
- †Cotinus
- †Crabro
- †Cratacanthus
- Crataegus
- Crotalus
- †Croton
- †Cryptocephalus
- †Cryptocheilus
- Cryptophagus
- Cryptorhynchus
- †Cryptus
CulexA living Culex mosquito - †Curculio
- †Cuterebra
- †Cyclotrachelus
- †Cydamus
- †Cylindrotoma
- †Cynarctoides
- †Cynelos
- Cynomys
- †Cyphomyia
- †Cypris
- †Daphne
- Daphnia
†DaphoenusLife restoration of the Eocene-Miocene bear dog Daphoenus - †Davidia
- †Denaeaspis – type locality for genus
- †Denaeaspis chelonopsis – type locality for species
- †Dennstaedtia
- †Dermatobia
- †Dermestes
- †Diabrotica
- †Diacodexis
- †Dialysis
- Diamesa
- †Dianthidium
- †Diceratherium
- †Dicerca
- Dicranomyia
- †Dicranota
- †Dictyla
- †Didymictis
- †Didymosphaeria
- †Dilophodon
†DinictisLife restoration of the Eocene-Miocene false saber-toothed cat Dinictis. Robert Bruce Horsfall (1913). - †Dinohippus
- †Dioctria
- Dioscorea
- †Diploptera
- Diplotaxis – tentative report
- Diplotaxis
- Dipodomys
- Dipteronia
- †Dissacus
- †Docimus – type locality for genus
- Dodonaea
DolichoderusPreserved Dolichoderus ant - †Dolichoderus antiquus – type locality for species
- †Dolichoderus kohlsi – type locality for species
- †Dolichoderus rohweri – type locality for species
- †Dominickus – type locality for genus
- †Dominickus castnioides – type locality for species
- †Domnina
- Donacia
- Dorytomus
- †Doxocopa
- †Drassonax
†DromomeryxFossilized horns, jaws, and limb bones of the Miocene deer relative Dromomeryx - †Dromomeryx borealis – type locality for species
- †Dryobius
- Dryopteris
- Dyschirius
- †Dysdercus
- †Echmatemys
- †Ectobius
- †Ectocion
- †Ectoconus
- †Elaeomyrmex – type locality for genus
- †Elaeomyrmex coloradensis – type locality for species
- †Elaeomyrmex gracilis – type locality for species
- †Elaphidion
- Elaphropus
- †Elater
- Eleodes
- †Emiliana – type locality for genus
- †Emiliana alexandri – type locality for species
- †Empis
- †Enallagma
- Engelhardtia
- Enochrus
- †Entimus
†EobasileusLife restoration of a pair of the Eocene uintathere mammal Eobasileus. Charles R. Knight (1890s). - †Eocuculus – type locality for genus
- †Eogryllus
- †Eohippus
- †Eosacantha – type locality for genus
- †Eosacantha delocranioides – type locality for species
- †Eotitanops
- Ephedra
- †Ephemera
- †Epicaerus
- Epicauta
- †Epicyon
- †Epihippus
- Epuraea
- †Epyris
- †Equisetum
- Equus
- †Equus conversidens
- †Equus francisci
†Equus scotti – or unidentified comparable formRestoration of the Pliocene-Holocene horse Equus scotti, or Scott's horse - †Equus simplicidens
- Eremophila
- Erethizon
- Eriocampa
- †Eriophyes – tentative report
- †Eristalis
- †Ernobius
- †Ethmia
- †Eubazus
- †Eucnemis
- †Eucommia
- Eugenia
†Eulithomyrmex – type locality for genusFossil of the Eocene ant Eulithomyrmex - †Eulithomyrmex rugosus – type locality for species
- †Eulithomyrmex striatus – type locality for species
- †Euparius
- Euphorbia
- †Eurytoma
- Eutamias
- †Eutamias minimus – or unidentified comparable form
- †Exochus
- Fagus
- Falcipennis
- Falco
- Ficus
†Florissantia – type locality for genusFossilized flower of the Eocene-Oligocene mallow relative Florissantia - †Florissantoraphidia funerata – type locality for species
- Formica
- †Fornax
- †Fraxinus
- †Fulgora
- †Fulica
- †Gaurotes
- †Geocoris
- Geomys
- †Geron – tentative report
- Gerris
- †Gigantocamelus
- †Glossina – type locality for genus
- Glyptostrobus
- Gnophomyia
- †Gomphocerus
†GomphotheriumMounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium - †Gorytes
- †Grammoptera
- †Gyaclavator – type locality for genus
- †Gyaclavator kohlsi – type locality for species
- †Gymnopternus
- †Gymnorhinus
- †Hadrianus
- Halesia
- †Hapalodectes
- †Haplolambda
- Harpalus
- †Helaletes
- †Helichus
- †Hellwigia
- Helophorus
- †Hemiauchenia
†HeptodonLife restoration of the Eocene tapir relative Heptodon - †Heriades
- †Herpetotherium
- Hersiliola
- †Hesperocyon
- Heterodon
- †Hexerites – type locality for genus
- †Hexerites primalis – type locality for species
- †Heyderia
- Holbrookia
- †Holcorpa – type locality for genus
- †Holcorpa maculosa – type locality for species
- †Homogalax
- †Hoplia
- †Hoplocampa
- †Hoplochelys
- †Humulus
†HyaenodonLife restoration of the Eocene-Miocene creodont mammal Hyaenodon - †Hydnobius
- Hydrangea
- Hydriomena
- †Hydriomena? protrita – tentative report
- Hydrobius
- †Hydromystria
- Hydrophilus
- Hydroporus
- Hydropsyche
- †Hydroptila
HygrotusA living Hygrotus predaceous diving beetle - †Hylobius
- †Hymenophyllum
- †Hyopsodus
- †Hypertragulus
- †Hypisodus
- †Hypohippus
- †Hypolagus
- †Hyporhina
- †Hyporhina galbreathi – type locality for species
- †Hyrachyus
†HyracodonLife restoration of the Eocene-Oligocene odd-toed ungulate Hyracodon. Charles R. Knight (1896). - †Hyracotherium
- †Ichneumon
- Ilex
- †Indusia
- †Iridomyrmex
- †Iridomyrmex florissantius – type locality for species
- †Iridomyrmex obscurans – type locality for species
- †Ischyromys
- †Isomira
- †Isothea – type locality for genus
- †Isotrilophus
- †Iulus
- †Jadera
- †Janus
- Jassus – tentative report. Lapsus calami of Iassus.
- †Judolia
- †Judolia antecurrens – type locality for species
JuglansA living Juglans, or walnut tree - Junco
- †Juncus
- †Kalmia
- †Kimbetohia
- Koelreuteria
- †Lacon
- †Lagopus
- †Lambdotherium
- †Lapton
LarusA living Larus gull - Lasiopodomys
- Lasius
- Lathrobium
- Laurus
- †Lebia
- †Leia
- †Lema
- Lemmiscus
- Lepisosteus
- †Leptauchenia
- †Leptis
- †Leptocyon
†LeptomeryxLife restoration of the Eocene-Oligocene even-toed ungulate Leptomeryx - †Leptomorphus
- Leptophloeus
- †Leptostylus
- †Leptura
- Lepus
- †Leucosticte
- †Leucozona
- †Ligyrocoris
- †Ligyrus
†LimnephilusA living Limnephilus caddisfly - †Limnobium
- †Limnophila
- †Limonius
- Lindera
- †Linnaea – type locality for genus
- †Linyphia
- †Liometopum
- †Liometopum miocenicum – type locality for species
- †Liometopum scudderi – type locality for species
- †Lithocharis
†Lithodryas – type locality for genusLife restoration of the Eocene butterfly Lithodryas - †Lithodryas styx – type locality for species
- †Locusta
- Lomatia
- Longitarsus
- Lontra
- †Lontra canadensis – or unidentified comparable form
- †Lucanus
- †Lycosa
- †Lygaeus
- Lygodium
- Lynx
- Lytta
MacrocranionLife restoration of the Eocene mammal Macrocranion - †Macrodactylus
- †Macrophya
- †Macrorhoptus
- Magdalis
- Magnolia
- Mahonia
- †Maiorana
- †Malachius
- †Malus
- †Mammuthus
†Mammuthus columbiLife restoration of a herd of Mammuthus columbi, or Columbian mammoths. The extent of the fur depicted is hypothetical. Charles R. Knight (1909).
- Marmota
- Martes
- †Megacerops
- Megachile
- †Megacyllene
- †Megahippus
- †Megalictis
- †Megapenthes
- †Megatylopus
- †Melanactes
- †Melanophila
- †Melieria
- †Melittomma
- †Mellinus
- Melospiza
- †Meniscotherium
†MenocerasLife restoration of the Miocene rhinoceros Menoceras - Mephitis
- †Merychippus
- †Merychyus
- †Merycochoerus
- †Merycodus
- †Merycoidodon – type locality for genus
- †Mesatirhinus
- †Mesochorus
- †Mesocyon
- †Mesodma
- †Mesohippus
- †Mesoleptus
- †Mesonyx
- †Mesostenus
- Messor
†MetacheiromysLife restoration of the Eocene pangolin relative Metacheiromys - Metachroma
- †Metarhinus
- Metasequoia
- †Miacis
- Miagrammopes
- †Michenia
- †Microplitis
- †Microsyops
- †Microtomarctus
- Microtus
†Microtus californicus – or unidentified comparable formA living Microtus californicus, or California vole - †Microtus longicaudus
- †Microtus ochrogaster
- †Mimoperadectes
- †Mindarus – type locality for genus
- †Miniochoerus
- †Miodytiscus – type locality for genus
- †Miohippus
- †Miomyrmex
- †Miomyrmex impactus – type locality for species
- †Miomyrmex striatus – type locality for species
†MiracinonyxRestoration of the Pliocene-Pleistocene Miracinonyx, or American cheetah - †Miracinonyx inexpectatus – or unidentified comparable form
- †Miracinonyx studeri
- †Monosaulax
- Mordella
- †Mordella atrata – or unidentified comparable form
- †Mordella lapidicola – type locality for species
- †Mordella priscula – type locality for species
- †Mordella stygia – type locality for species
- Mordellistena
- †Mordellistena florissantensis – type locality for species
- †Mordellistena nearctica – type locality for species
- †Mordellistena scudderiana – type locality for species
- †Mordellistena smithiana – type locality for species
- †Moropus
- Morus
- Musca
- Mustela
- †Myas
- †Mycetophagus
- Mycetoporus
- Myrica
- Myrmica
- Nebria
- †Nemognatha
- †Neoliotomus
- Neogale
- Neotoma
- †Nepa
- †Nephila
- †Netelia
- †Nicocles
†NotharctusMounted fossilized skeleton of the Eocene primate Notharctus - Notonecta
- Numenius
- †Numitor – type locality for genus
- †Nyctea
- Nymphaea
- Nysius
- †Nyssa
- Ochotona
- †Odaxosaurus – or unidentified comparable form
- Odocoileus
†Odocoileus hemionusLiving male (right) and female (left) Odocoileus hemionus, or mule deer.
- †Odynerus
- †Oedipoda
- †Ogygoptynx – type locality for genus
- †Oligoaeschna – type locality for genus
- †Oligomerus
- †Oligotricha
- Omalium
- Omus
- Ondatra
- †Oodectes
- Ophisaurus
- Ophryastes
- †Ophyra
- †Opisthotriton
- †Orchelimum
- Orchestes
- Oreamnos – or unidentified comparable form
†Oreamnos harringtoniA living Oreamnos harringtoni, or Harrington's mountain goat
- †Oreopanax
- †Orohippus
- †Orontium
- †Orphilus
- †Orthocentrus
- †Osmanthus
- †Osmunda
- †Otiorhynchus
- Ovis
- †Oxyacodon
†OxyaenaRestoration of the Paleocene-Eocene creodont mammal Oxyaena - †Oxycera
- †Oxyomus
- †Pachyaena
- †Paederus
- †Palaeogale
- †Palaeolagus
- †Palaeonictis
- †Palaeosinopa
†Palaeosyops – type locality for genusRestorative model and fossilized skull of the Eocene brontothere mammal Palaeosyops - †Palaeovespa – type locality for genus
- †Palaeovespa florissantia – type locality for species
- †Palaeovespa gillettei – type locality for species
- †Palaeovespa relecta – type locality for species
- †Palaeovespa scudderi – type locality for species
- †Palaeovespa wilsoni – type locality for species
- †Palatobaena
- †Panax
- †Panorpa
- †Paracynarctus
- †Parahippus
- †Parahippus leonensis – or unidentified comparable form
†ParamylodonFossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon - †Paramys
- †Parandra
- †Paratylopus
- †Parectypodus
- †Parictis
- †Parthenocissus
- †Passaloecus
- †Patriofelis
- Pediacus
- Pekania
- †Pellea
†PeltosaurusFossilized skull of the Eocene-Oligocene lizard Peltosaurus - †Peltosaurus granulosus – type locality for species
- †Pelycodus
- Penthetria – type locality for genus
- †Pepsis
- †Peraceras
- †Peratherium
- Peromyscus
- Persea
†Petraeomyrmex – type locality for genusFossil of the Oligocene ant Petraeomyrmex - †Petraeomyrmex minimus – type locality for species
- †Phaca
- Phalacrocorax
- Phalaropus
- †Phasmagyps – type locality for genus
- Pheidole
- †Phenacodus
- Phenacomys
- Philadelphus
- †Philanthus
†PhlaocyonIllustration of a fossilized skull in multiple views of the Oligocene-Miocene bone-crushing dog Phlaocyon - Phloeosinus
- †Phora
- Phryganea
- Phrynosoma
- †Phylledestes – type locality for genus
- †Phylledestes vorax – type locality for species
- †Phyllobaenus
- Phyllobius
- †Phyllophaga
- †Phymatodes
- Pica
- Picea
- Picoides
- †Pidonia
- †Pimpla
- Pinus
- †Pipiza
- †Pison
- Pituophis
- Platanus
- Plateumaris
- †Platycheirus
- Platydema
†PlatygonusLife restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922). - Platynus
- Platystethus
- Plecia
- †Plesiadapis
- †Plesiobaena
- †Pliohippus
- †Plochionus
- †Poabromylus
- Podabrus
- Podiceps
- Podilymbus
†PoebrotheriumLife restoration of the Eocene-Oligocene camel Poebrotherium - †Poecilocapsus
- †Poecilognathus – type locality for genus
- †Pogonomyrmex
- †Pogonomyrmex fossilis – type locality for species
- †Polysphincta
- Populus
- Porzana
- †Potamogeton
- †Praepapilio – type locality for genus
- †Praepapilio colorado – type locality for species
- †Praepapilio gracilis – type locality for species
- †Priabona
- †Pristichampsus
- †Probathyopsis
- †Procas
†Prodryas – type locality for genusIllustration of a fossil of the Eocene butterfly Prodryas - †Prodryas persephone – type locality for species
- †Proiridomyrmex – type locality for genus
- †Proiridomyrmex vetulus – type locality for species
- †Prolimnocyon
- †Proscalops
- Prosopis
- †Protazteca – type locality for genus
- †Protazteca capitata – type locality for species
- †Protazteca elongata – type locality for species
- †Protazteca hendersoni – type locality for species
- †Protazteca quadrata – type locality for species
- †Protohippus
- †Protolabis
- †Protomarctus
†ProtorohippusProtorohippus - †Protostephanus – type locality for genus
- †Protostephanus ashmeadi – type locality for species
- †Protungulatum
- Prunus
- †Psephenus
- Pseudacris
†PseudaelurusRestoration of the Miocene cat Pseudaelurus - †Pseudhipparion
- Pseudomyrmex
- †Pseudoprotoceras
- †Psittacotherium
- Ptelea
- Pterocarya
- †Pteromalus
- Pterostichus
- †Ptilodus
- †Ptosima
- Quedius
- Quercus
- Rallus
- †Ramoceros
- †Rallus
†RamocerosLife restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx. Robert Bruce Horsfall (1913). - †Rana
- †Raphidia
- Reithrodontomys
- Reticulitermes
- Rhabdomastix
- †Rhagio
- Rhagonycha
- †Rhamnus
- †Rhamphomyia
RhineuraA living Rhineura floridana, or North American worm lizard - †Rhingia
- Rhizophagus
- Rhus
- †Rhyssa
- †Ribes
- †Robinia
- †Rogas
- Rosa
- †Rothschildia
- Rubus
- Sabal
- †Saccoloma
- Salix
- †Sambucus
†SaniwaFossilized skeleton of the Eocene monitor lizard Saniwa - †Saperda
- †Saperda florissantensis – type locality for species
- †Sapindus
- †Sapromyza
- Sassafras
- Scaphinotus
- Sceloporus
- Sciara
- †Sciophila
- Sciurus
- Scolytus
- †Segestria
- †Selaginella
- †Semanotus
- Sequoia
†Sequoia affinisFossilized branch fragment from a Sequoia affinis
- Serica
- †Sespia
- †Sialia
- †Sibinia
- †Sifrhippus
- Sigmodon
- †Silpha
- †Silvius
- †Sinonyx – or unidentified comparable form
- Sitona
- †Sitones
- Sitta
- †Smilax
†SmilodectesMounted fossilized skeleton of the Eocene primate Smilodectes - Sonoma
- Sorex
- †Sparganium
- Spea
- †Spermophagus
- Spermophilus
- †Spermophilus elegans – or unidentified comparable form
- †Spermophilus lateralis
- †Spermophilus richardsonii
- †Spermophilus tridecemlineatus
- †Sphegina
†SphenocoelusLife restoration of the Eocene brontothere mammal Sphenocoelus - Spilogale
- Spizella
- †Staphylea
- Staphylinus
- †Stenolophus
- †Stenosphenus
- Stenus
- Sterculia
- Stilbus
- †Stipa
- †Strategus
- †Stylinodon
†SubhyracodonLife restoration of the Eocene-Oligocene cow-sized rhinoceros Subhyracodon. Charles R. Knight (1890s). - Sylvilagus
- †Symphoromyia
- Syrphus
- †Systena
- †Tabanus
- Tachycineta
- Tachyporus
- †Tachys
- Tamiasciurus
- Tapirus
- Taxidea
- †Teilhardina
†TeleocerasRestoration of the Miocene-Pliocene rhinoceros Teleoceras - †Tenor – type locality for genus
- †Tenthredo
- †Tetragnatha
- †Tetraonyx
- †Tetraopes
- †Tetraopes submersus – type locality for species
- †Tetrapus
- Thamnophis
†Thamnophis elegansA living Thamnophis elegans, or western terrestrial garter snake - †Thamnophis sirtalis
- †Thanasimus
- †Themira
- †Thomisus
- Thomomys
- †Thouinia
- †Thuja
- †Ticholeptus
- Tilia
- †Tingis
- Tipula – type locality for genus
- †Titanoeca
†TitanoidesLife restoration of the Paleocene pantodont mammal Titanoides - †Tomarctus
- †Tomarctus brevirostris – type locality for species
- †Tomoxia
- †Tomoxia inundata – type locality for species
- †Torreya
- †Tortricites
- †Tortrix
- †Tortrix florissantana – type locality for species
- †Torymus
- Trechus
- †Trichilia
- †Triga
- †Trigonias
- †Trigonoscuta
- †Triplax
- †Tritemnodon
- †Triumfetta
- †Trixoscelis
- †Trogosus
- Trogoxylon
- †Trogus
- †Tropisternus
- Trox
- †Trypherus
- †Tryphon
- †Tychius
- Typha
- †Uintacyon
- †Uintascorpio – type locality for genus
- Ulmus
- †Ulus
- Urocyon
†Urocyon cinereoargenteusA living Urocyon cinereoargenteus, or gray fox
- †Ursavus
- Ursus
- †Ustatochoerus
- †Vanessa
- †Vauquelinia
- †Viburnum
- †Vicia
- †Villa – type locality for genus
- Vitis
- †Viverravus
- †Vrilletta
†VulpavusMounted fossilized skeleton of the Eocene mammal Vulpavus - Vulpes
- †Weinmannia
- †Woodwardia
- †Xantholinus
- †Xestobium
- †Xylocopa
- †Xylomya
- †Xyronomys
- †Yumaceras
- †Zamia
- Zelkova
- Zizyphus
- Zonotrichia
- †Zootermopsis
†ZygolophodonKnown material diagram depicting the Miocene-Pleistocene mastodon relative Zygolophodon with a human to scale
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.