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[edit]

The Paleobiology Database records no known occurrences of Precambrian fossils in Colorado.

Paleozoic[edit]

Selected Paleozoic taxa of Colorado[edit]

• †Actinoceras
• †Aglaocrinus
• †Amorphognathus
• †Amplexus
• †Archaeocidaris

• 

  †Astraspis – type locality for genus
  • †Astraspis desiderata – type locality for species
• †Athyris
• †Aviculopecten
• †Calamites
  • †Calamites cistii
  • †Calamites cruciatus
• †Callipteris
  • †Callipteris lyratifolia – or unidentified comparable form
• †Camarotoechia
• †Caninia

• 

  †Catenipora
• †Ceraurinus
• †Charactoceras – tentative report
• †Chirognathus
• †Composita
  • †Composita ovata
• †Conocardium
• †Cordaites
• †Cornulites
• †Crania
• †Ctenacanthus
  • †Ctenacanthus buttersi
  • †Ctenacanthus furcicarinatus
• †Cupressocrinites

• 

  †Cutleria – type locality for genus
  • †Cutleria wilmarthi – type locality for species
• †Cyclopteris
• †Cyrtogomphoceras
• †Cyrtospirifer
  • †Cyrtospirifer animasensis
  • †Cyrtospirifer whitneyi
• †Echinosphaerites – tentative report
• †Edestus
• †Endoceras
• †Eretmocrinus

• 

  †Eryops
• †Euomphalus
• †Girvanella
• †Halysites
• †Isalaux – type locality for genus
• †Isonema
• †Kionoceras
• †Lambeoceras
• †Lepidodendron
• †Lepidostrobus
• †Limnoscelis
• †Lingula
• †Meristella
• †Neospirifer
  • †Neospirifer goreii
• †Neuropteris
  • †Neuropteris auriculata
  • †Neuropteris gigantea – tentative report
  • †Neuropteris heterophylla

• 

  †Ophiacodon
• †Oradectes
• †Ormoceras
• †Orthoceras
• †Oulodus
• †Paladin – tentative report
• †Pecopteris
  • †Pecopteris arborescens
• †Plaesiomys
• †Platyceras

• 

  †Platyhystrix
  • †Platyhystrix rugosus
• †Pugnax
• †Receptaculites
• †Samaropsis
• †Sandia
• †Seymouria
• †Sigillaria
  • †Sigillaria elegans – or unidentified comparable form
• †Sphenophyllum
• †Sphenopteris
• †Spirifer
  • †Spirifer centronatus
• Spirorbis
• †Spyroceras
• †Stigmaria
• †Strepsodiscus – type locality for genus
• †Strophomena
• †Syringopora

• 

  †Taxocrinus
• †Walchia
• †Westonoceras

Mesozoic[edit]

Selected Mesozoic taxa of Colorado[edit]

• Acmaea
• †Adocus
• †Albanerpeton
  • †Albanerpeton nexuosus
• †Albertosaurus – tentative report

• 

  †Allosaurus – type locality for genus
  • †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 genus
  • †Apatosaurus ajax – type locality for species
  • †Apatosaurus louisae – type locality for species
• †Arenicolites
• Aspideretes
• Astarte
• †Atlantosaurus
  • †Atlantosaurus immanis – type locality for species
• †Axonoceras

• 

  †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

• 

  †Basilemys
• †Bison
  • †Bison alticornis – type locality for species
• †Borealosuchus
  • †Borealosuchus sternbergii
• †Brachauchenius – or unidentified comparable form
• †Brachiosaurus – type locality for genus
  • †Brachiosaurus altithorax – type locality for species
• †Brachychampsa
  • †Brachychampsa montana
• †Brachyphyllum

• 

  †Brontosaurus
  • †Brontosaurus excelsus
  • †Brontosaurus yahnahpin
• †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 genus
  • †Ceratosaurus nasicornis – type locality for species
• Cerithiopsis
• †Champsosaurus
• Chara
• †Chelonipus
• †Chinlea
• †Chirotherium
  • †Chirotherium lulli
• †Cimolichthys
  • †Cimolichthys nepaholica
• †Cimolodon – or unidentified comparable form

• 

  †Cimolomys
• †Cionodon – type locality for genus
  • †Cionodon arctatus – type locality for species
• †Cirroceras
• †Clidastes
• †Coelophysis – tentative report
• †Coelurus
  • †Coelurus fragilis
• †Compsemys
• †Coniasaurus
• Corbula
• †Crenella
• †Cretolamna
  • †Cretolamna appendiculata
• †Cretoxyrhina
  • †Cretoxyrhina mantelli
• Cucullaea
• Cuspidaria
• †Didymoceras
  • †Didymoceras cheyennense
  • †Didymoceras stevensoni
• †Dinehichnus
• †Dinochelys

• 

  †Diplodocus – type locality for genus
  • †Diplodocus lacustris – type locality for species
  • †Diplodocus longus – type locality for species
• †Diplosaurus
• Discinisca
• †Discoscaphites
  • †Discoscaphites conradi
• †Docodon
• †Dorsetisaurus
• †Dorsetochelys
• †Dryosaurus
  • †Dryosaurus altus
• †Edmontonia

• 

  †Edmontosaurus
  • †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
  • †Eubrontes giganteus
• †Eucalycoceras
• †Euomphaloceras
• †Eutrephoceras
• †Eutretauranosuchus – type locality for genus
  • †Eutretauranosuchus delfsi – type locality for species
• †Exiteloceras
• †Exogyra

• 

  †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
  • †Galeamopus pabsti
• †Glirodon
  • †Glirodon grandis
• †Glyptops

• 

  †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
  • †Hoploscaphites birkelundae
  • †Hoploscaphites nicolletii
• †Hulettia – report made of unidentified related form or using admittedly obsolete nomenclature
• †Hypsirophus – type locality for genus
• †Ichthyodectes
• †Ignotornis – type locality for genus

• 

  †Inoceramus
  • †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

• 

  †Jeletzkytes
  • †Jeletzkytes brevis
  • †Jeletzkytes dorfi
  • †Jeletzkytes nodosus
• †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
  • †Leptalestes cooki
• †Leptolepis – or unidentified comparable form
• Lima
• †Lingula
• †Lioestheria
• †Lisserpeton
  • †Lisserpeton bairdi
• †Lonchidion
• †Lucina
• †Macelognathus
• †Magnoavipes
• †Marshosaurus – or unidentified comparable form

• 

  †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
  • †Metoicoceras geslinianum
• †Micropycnodon
• †Modiolus
• †Morosaurus
• †Morrolepis
• †Myledaphus
  • †Myledaphus bipartitus

• 

  †Mymoorapelta – type locality for genus
  • †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

• 

  †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
  • †Nucula percrassa
• †Odaxosaurus
  • †Odaxosaurus piger
• †Opisthias
• †Opisthotriton
• †Ornitholestes – tentative report
• †Ornithomimipus
• †Ornithomimus – type locality for genus
  • †Ornithomimus velox – type locality for species
• Ostrea
• †Othnielia – tentative report
• †Othnielosaurus
  • †Othnielosaurus consors
• †Oxytoma

• 

  †Pachycephalosaurus
• †Pachyrhizodus
  • †Pachyrhizodus minimus
• †Palaeobalistum
• †Palaeopteryx – type locality for genus
• †Parabrontopodus – type locality for genus
• †Paramacellodus
• †Paressonodon – type locality for genus
• †Parikimys – type locality for genus
• †Parviraptor
• †Pentaceratops
  • †Pentaceratops sternbergii
• †Pinna
• †Placenticeras
  • †Placenticeras meeki

• 

  †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

• 

  †Prognathodon
  • †Prognathodon overtoni
  • †Prognathodon stadtmani – type locality for species
• Propeamussium
• †Protocardia
• †Protosphyraena
• Prunus
• †Pseudoperna
  • †Pseudoperna congesta
• †Pseudotetrasauropus – tentative report
• †Pteraichnus
• †Ptychodus
  • †Ptychodus anonymus
  • †Ptychodus decurrens
  • †Ptychodus occidentalis
  • †Ptychodus whipplei
• Pycnodonte
  • †Pycnodonte newberryi
• Rhinobatos
  • †Rhinobatos incertus
• †Rosselia
• †Saurillodon
• †Scapherpeton

• 

  †Scaphites
  • †Scaphites binneyi
  • †Scaphites depressus
  • †Scaphites hippocrepis – or unidentified comparable form
  • †Scaphites nodosus
• †Scoyenia
• †Selaginella
• †Semionotus
• †Sphenodiscus
  • †Sphenodiscus pleurisepta
• Squalicorax
  • †Squalicorax curvatus
  • †Squalicorax falcatus
  • †Squalicorax pristodontus
• †Squatirhina
  • †Squatirhina americana

• 

  †Stegosaurus – type locality for genus
  • †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

• 

  †Torosaurus
  • †Torosaurus latus
• †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
  • †Tylosaurus proriger

• 

  †Tyrannosaurus
  • †Tyrannosaurus rex
• †Vascoceras
• Viviparus
• †Volviceramus
• †Walteria – type locality for genus
• †Watinoceras
  • †Watinoceras coloradoense – type locality for species
• †Websteria
• †Xiphactinus
  • †Xiphactinus audax

Cenozoic[edit]

Selected Cenozoic taxa of Colorado[edit]

• 

  Abies
• †Absyrtus
• †Acalles
• Abies
• †Absyrtus
• †Acalles
• Acer
• †Acilius
• Acris
• †Acrostichum
• †Adalia
• †Adelopsyche – type locality for genus
• †Adocus
• Aegialia
• †Aelurodon

• 

  †Aepycamelus
  • †Aepycamelus giraffinus
• †Aeshna
• Agabus
• †Agallia
• †Agathemera
• Agelaius
• †Agnotocastor
• Agrilus
• Agriotes
• †Agromyza
• †Agulla
  • †Agulla protomaculata – type locality for species

• 

  †Ailanthus
• †Aletodon
• Aleurites
• †Alforjas – tentative report
• †Allognathosuchus
• †Allophylus
• Altica
• †Alysia
• Amara
• †Amauropilio
• †Amblycorypha – tentative report
• †Amblyteles
• †Ambystoma
  • †Ambystoma tigrinum

• 

  †Amebelodon
• Amelanchier
• Amia
• †Ammophila
• †Ampelopsis
• †Amphechinus
• †Amphicerus
• †Amphicyon
  • †Amphicyon galushai
  • †Amphicyon ingens

• 

  †Amphimachairodus
• †Anabrus
• Anas
• †Anasa
• †Anatis
• †Anchitherium
• Andrena
• †Andrias
• †Andricus
• †Anelaphus
• †Anemia
• †Angustidens
• Anisotoma
• †Anobium
• †Anomala
• †Anomalon
• Anser
• †Antas
• Anthaxia
• †Antherophagus

• 

  †Anthidium
  • †Anthidium exhumatum – type locality for species
  • †Anthidium scudderi – type locality for species
• †Anthomyia
• Anthonomus
• †Anthophora
• Antilocapra
  • †Antilocapra americana
• †Antocha
• Aphaenogaster
  • †Aphaenogaster donisthorpei – type locality for species
  • †Aphaenogaster mayri – type locality for species
• †Aphelops
• Aphodius
• Aphrophora
• Apion
• †Apolysis
• Aquila
  • †Aquila chysaetos
• Araneus
• †Archaeotherium
• †Archimyrmex – type locality for genus
  • †Archimyrmex rostratus – type locality for species
• †Archiponera – type locality for genus
  • †Archiponera wheeleri – type locality for species

• 

  †Arctocyon
• †Argia
• †Arhopalus
• †Aristolochia
• †Artocarpus
• †Asimina
• Asio
• †Asplenium
• †Aster
• †Astronium
• Ataenius
• †Athalia

• 

  †Athous
• †Athyana
• †Attagenus
• †Auraria – type locality for genus
• Aythya
  • †Aythya affinis
  • †Aythya americana
• †Aztlanolagus
• †Baena
• †Baris

• 

  †Barylambda
• †Bassus
• †Bathornis – type locality for genus
  • †Bathornis veredus – type locality for species
• †Bathygenys
• †Bathyopsis
• †Belyta
• Bembidion
  • †Bembidion constricticolle
• †Bembidium
• †Beris
• Betula
• Bibio
• †Bibiodes
• †Bidessus
• Bison
  • †Bison antiquus – or unidentified comparable form

  • 

    †Bison latifrons
• †Blechnum
• Bledius
• Boletina
• †Borealosuchus
• †Borophagus
  • †Borophagus pugnator
• †Brachinus
• †Brachycrus
• Brachylagus
• †Brachyprotoma
  • †Brachyprotoma obtusata
• †Brachypsalis

• 

  †Brachyrhynchocyon
• †Brachyspathus – type locality for genus
• Bracon
• †Bruchus
• Bubo
  • †Bubo virginianus
• Bufo
  • †Bufo cognatus
  • †Bufo woodhousei
• †Buprestis
• †Bursera

• 

  Buteo
• †Caesalpinia
• †Calcarius
  • †Calcarius lapponicus
  • †Calcarius ornatus
• †Calippus
• †Caliroa
• †Callimoxys
• †Callomyia – tentative report
• Calosoma
• †Calyptapis – type locality for genus
  • †Calyptapis florissantensis – type locality for species

• 

  †Camelops
  • †Camelops hesternus
• Camponotus
• Canis
  • †Canis edwardii – or unidentified comparable form
  • †Canis latrans
• †Cantius
  • †Cantius abditus
  • †Cantius frugivorus
  • †Cantius mckennai
  • †Cantius ralstoni
• †Capnobotes
• †Capsus

• 

  Carabus
• †Cardiophorus
• †Cardiospermum
• †Carpocyon
• Carpodacus
  • †Carpodacus cassinii
• †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 genus
  • †Ceratosuchus burdoshi – type locality for species
• †Ceraturgus
• Cercidiphyllum
• Cercis
• †Cercocarpus
• †Cercopis
• Cervus
  • †Cervus elaphus
• Ceutorhynchus
• Chaetodipus
  • †Chaetodipus hispidus
• †Chalcis
• †Chalybion
• †Chamaecyparis

• 

  †Chamaedorea
• Charina
• †Chauliognathus
• Cheilosia
• †Chelonus
• †Chilocorus
• †Chionaemopsis – type locality for genus
• Chironomus
• Chondestes
  • †Chondestes grammacus
• †Chriacus
• †Chrysis
• †Chrysobothris
• †Chrysogaster
• Chrysomela
• †Cicada
• †Cicadella
• †Cimbex
• †Cimexomys
  • †Cimexomys arapahoensis – type locality for species
  • †Cimexomys minor

• 

  Cinnamomum
• Cissus
• †Cixius – tentative report
• †Cladius
• †Cladura
• †Clastoptera
• †Cleonus
• †Closterocoris
  • †Closterocoris elegans – type locality for species
• †Clubiona
• †Clytus
• †Coccinella
• †Coeliodes
• Colaptes

  • 

    †Colaptes auratus
• †Colaspis
• †Collops
• †Colopterus
• †Colubrina
• †Compsemys
• †Coniatus
• Conotelus
  • †Conotelus obscurus
• †Conotrachelus
• †Conzattia
• †Copecion
• †Copelemur
• †Copidita
• Corixa
• †Corizus
• †Cormocyon
• †Cormohipparion
• Cornus
• Corticaria
• Corvus
  • †Corvus brachyrhynchos
  • †Corvus corax
• †Corylus

• 

  †Coryphodon
• Cossonus
• †Cotinus
• †Crabro
• †Cratacanthus
• Crataegus
• Crotalus
  • †Crotalus viridis
• †Croton
• †Cryptocephalus
• †Cryptocheilus
• Cryptophagus
• Cryptorhynchus
• †Cryptus

• 

  Culex
• †Curculio
• †Cuterebra
• †Cyclotrachelus
• †Cydamus
• †Cylindrotoma
• †Cynarctoides
  • †Cynarctoides acridens
• †Cynelos
• Cynomys
• †Cyphomyia
• †Cypris
• †Daphne
• Daphnia

• 

  †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

• 

  †Dinictis
• †Dinohippus
• †Dioctria
• Dioscorea
• †Diploptera
• Diplotaxis – tentative report
• Diplotaxis
• Dipodomys
  • †Dipodomys ordii
• Dipteronia
• †Dissacus
• †Docimus – type locality for genus
• Dodonaea

• 

  Dolichoderus
  • †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

• 

  †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

• 

  †Eobasileus
  • †Eobasileus cornutus
• †Eocuculus – type locality for genus
• †Eogryllus
• †Eohippus
  • †Eohippus angustidens
• †Eosacantha – type locality for genus
  • †Eosacantha delocranioides – type locality for species
• †Eotitanops
• Ephedra
• †Ephemera
• †Epicaerus
• Epicauta
• †Epicyon
  • †Epicyon haydeni
• †Epihippus
• Epuraea
• †Epyris
• †Equisetum
• Equus
  • †Equus conversidens
  • †Equus francisci

  • 

    †Equus scotti – or unidentified comparable form
  • †Equus simplicidens
• Eremophila
  • †Eremophila alpestris
• Erethizon
• Eriocampa
• †Eriophyes – tentative report
• †Eristalis
• †Ernobius
• †Ethmia
• †Eubazus
• †Eucnemis
• †Eucommia
• Eugenia

• 

  †Eulithomyrmex – type locality for genus
  • †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
  • †Falco sparverius
• Ficus

• 

  †Florissantia – type locality for genus
  • †Florissantoraphidia funerata – type locality for species
• Formica
• †Fornax
• †Fraxinus
• †Fulgora
• †Fulica
  • †Fulica americana
• †Gaurotes
• †Geocoris
• Geomys
  • †Geomys bursarius
• †Geron – tentative report
• Gerris
• †Gigantocamelus
• †Glossina – type locality for genus
• Glyptostrobus
• Gnophomyia
• †Gomphocerus

• 

  †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
  • †Hemiauchenia macrocephala

• 

  †Heptodon
• †Heriades
• †Herpetotherium
  • †Herpetotherium fugax
  • †Herpetotherium knighti
• Hersiliola
• †Hesperocyon
• Heterodon
  • †Heterodon nasicus
• †Hexerites – type locality for genus
  • †Hexerites primalis – type locality for species
• †Heyderia
• Holbrookia
  • †Holbrookia maculata
• †Holcorpa – type locality for genus
  • †Holcorpa maculosa – type locality for species
• †Homogalax
• †Hoplia
• †Hoplocampa
• †Hoplochelys
• †Humulus

• 

  †Hyaenodon
  • †Hyaenodon crucians
  • †Hyaenodon horridus
  • †Hyaenodon mustelinus
• †Hydnobius
• Hydrangea
• Hydriomena
• †Hydriomena? protrita – tentative report
• Hydrobius
  • †Hydrobius fuscipes
• †Hydromystria
• Hydrophilus
• Hydroporus
• Hydropsyche
• †Hydroptila

• 

  Hygrotus
• †Hylobius
• †Hymenophyllum
• †Hyopsodus
• †Hypertragulus
• †Hypisodus
• †Hypohippus
• †Hypolagus
• †Hyporhina
  • †Hyporhina galbreathi – type locality for species
• †Hyrachyus

• 

  †Hyracodon
• †Hyracotherium
  • †Hyracotherium vasacciense
• †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

• 

  Juglans
• Junco
  • †Junco hyemalis
• †Juncus
• †Kalmia
• †Kimbetohia
• Koelreuteria
• †Lacon
• †Lagopus
  • †Lagopus leucurus
• †Lambdotherium
• †Lapton

• 

  Larus
• Lasiopodomys
• Lasius
• Lathrobium
• Laurus
• †Lebia
• †Leia
• †Lema
• Lemmiscus
  • †Lemmiscus curtatus
• Lepisosteus
• †Leptauchenia
• †Leptis
• †Leptocyon

• 

  †Leptomeryx
• †Leptomorphus
• Leptophloeus
• †Leptostylus
• †Leptura
• Lepus
  • †Lepus townsendii
• †Leucosticte
  • †Leucosticte atrata
  • †Leucosticte tephrocotis
• †Leucozona
• †Ligyrocoris
• †Ligyrus

• 

  †Limnephilus
• †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 genus
  • †Lithodryas styx – type locality for species
• †Locusta
• Lomatia
• Longitarsus
• Lontra
  • †Lontra canadensis – or unidentified comparable form
• †Lucanus
• †Lycosa
• †Lygaeus
• Lygodium
• Lynx
  • †Lynx rufus
• Lytta

• 

  Macrocranion
• †Macrodactylus
• †Macrophya
• †Macrorhoptus
• Magdalis
• Magnolia
• Mahonia
• †Maiorana
• †Malachius
• †Malus
• †Mammuthus

  • 

    †Mammuthus columbi
• Marmota
  • †Marmota flaviventris
• Martes
• †Megacerops
• Megachile
• †Megacyllene
• †Megahippus
• †Megalictis
• †Megapenthes
• †Megatylopus
• †Melanactes
• †Melanophila
• †Melieria
• †Melittomma
• †Mellinus
• Melospiza
  • †Melospiza lincolnii
• †Meniscotherium

• 

  †Menoceras
• Mephitis
  • †Mephitis mephitis
• †Merychippus
  • †Merychippus sejunctus
• †Merychyus
• †Merycochoerus
• †Merycodus
• †Merycoidodon – type locality for genus
• †Mesatirhinus
• †Mesochorus
• †Mesocyon
• †Mesodma
  • †Mesodma hensleighi
• †Mesohippus
• †Mesoleptus
• †Mesonyx
  • †Mesonyx obtusidens
• †Mesostenus
• Messor

• 

  †Metacheiromys
• Metachroma
• †Metarhinus
• Metasequoia
  • †Metasequoia occidentalis
• †Miacis
• Miagrammopes
• †Michenia
• †Microplitis
• †Microsyops
• †Microtomarctus
• Microtus

  • 

    †Microtus californicus – or unidentified comparable form
  • †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

• 

  †Miracinonyx
  • †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
  • †Mustela richardsonii
  • †Mustela nigripes
• †Myas
• †Mycetophagus
• Mycetoporus
• Myrica
• Myrmica
• Nebria
• †Nemognatha
• †Neoliotomus
  • †Neoliotomus conventus
  • †Neoliotomus ultimus
• Neogale
  • Neogale frenata
  • Neogale vison
• Neotoma
  • †Neotoma cinerea
• †Nepa
• †Nephila
• †Netelia
• †Nicocles

• 

  †Notharctus
  • †Notharctus robustior
• Notonecta
• Numenius
  • †Numenius madagascariensis
• †Numitor – type locality for genus
• †Nyctea
  • †Nyctea scandiaca
• Nymphaea
• Nysius
• †Nyssa
• Ochotona
  • †Ochotona princeps
• †Odaxosaurus – or unidentified comparable form
  • †Odaxosaurus piger
• Odocoileus

  • 

    †Odocoileus hemionus
• †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 harringtoni
• †Oreopanax
• †Orohippus
• †Orontium
• †Orphilus
• †Orthocentrus
• †Osmanthus
• †Osmunda
  • †Osmunda greenlandica
• †Otiorhynchus
• Ovis
  • †Ovis canadensis
• †Oxyacodon

• 

  †Oxyaena
• †Oxycera
• †Oxyomus
• †Pachyaena
• †Paederus
• †Palaeogale
• †Palaeolagus
• †Palaeonictis
• †Palaeosinopa
  • †Palaeospiza bella

• 

  †Palaeosyops – type locality for genus
• †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

• 

  †Paramylodon
  • †Paramylodon harlani
• †Paramys
• †Parandra
• †Paratylopus
• †Parectypodus
  • †Parectypodus lunatus
• †Parictis
• †Parthenocissus
• †Passaloecus
• †Patriofelis
• Pediacus
• Pekania
• †Pellea

• 

  †Peltosaurus
  • †Peltosaurus granulosus – type locality for species
• †Pelycodus
  • †Pelycodus danielsae
  • †Pelycodus jarrovii
• Penthetria – type locality for genus
• †Pepsis
• †Peraceras
• †Peratherium
• Peromyscus
  • †Peromyscus maniculatus
• Persea

• 

  †Petraeomyrmex – type locality for genus
  • †Petraeomyrmex minimus – type locality for species
• †Phaca
• Phalacrocorax
• Phalaropus
  • †Phalaropus lobatus
• †Phasmagyps – type locality for genus
• Pheidole
• †Phenacodus
• Phenacomys
  • †Phenacomys intermedius
• Philadelphus
• †Philanthus

• 

  †Phlaocyon
• Phloeosinus
• †Phora
• Phryganea
• Phrynosoma
  • †Phrynosoma douglassi
• †Phylledestes – type locality for genus
  • †Phylledestes vorax – type locality for species
• †Phyllobaenus
• Phyllobius
• †Phyllophaga
• †Phymatodes
• Pica
  • †Pica hudsonia
• Picea
• Picoides
  • †Picoides villosus
• †Pidonia
• †Pimpla
• Pinus
• †Pipiza
• †Pison
• Pituophis
  • †Pituophis melanoleucus
• Platanus
• Plateumaris
• †Platycheirus
• Platydema

• 

  †Platygonus
• Platynus
• Platystethus
• Plecia
• †Plesiadapis
• †Plesiobaena
• †Pliohippus
• †Plochionus
• †Poabromylus
• Podabrus
• Podiceps
• Podilymbus
  • †Podilymbus podiceps

• 

  †Poebrotherium
• †Poecilocapsus
• †Poecilognathus – type locality for genus
• †Pogonomyrmex
  • †Pogonomyrmex fossilis – type locality for species
• †Polysphincta
• Populus
• Porzana
  • †Porzana carolina
• †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 genus
  • †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

• 

  †Protorohippus
• †Protostephanus – type locality for genus
  • †Protostephanus ashmeadi – type locality for species
• †Protungulatum
  • †Protungulatum donnae
• Prunus
  • †Prunus gracilis
• †Psephenus
• Pseudacris
  • †Pseudacris triseriata

• 

  †Pseudaelurus
• †Pseudhipparion
• Pseudomyrmex
• †Pseudoprotoceras
• †Psittacotherium
• Ptelea
• Pterocarya
• †Pteromalus
• Pterostichus
• †Ptilodus
  • †Ptilodus kummae
• †Ptosima
• Quedius
• Quercus
• Rallus
  • †Rallus limicola
• †Ramoceros
• †Rallus
  • †Rallus limicola

• 

  †Ramoceros
• †Rana
  • †Rana catesbeiana
• †Raphidia
• Reithrodontomys
• Reticulitermes
• Rhabdomastix
• †Rhagio
• Rhagonycha
• †Rhamnus
• †Rhamphomyia

• 

  Rhineura
• †Rhingia
• Rhizophagus
• Rhus
• †Rhyssa
• †Ribes
• †Robinia
• †Rogas
• Rosa
• †Rothschildia
• Rubus
• Sabal
• †Saccoloma
• Salix
• †Sambucus

• 

  †Saniwa
• †Saperda
  • †Saperda florissantensis – type locality for species
• †Sapindus
• †Sapromyza
• Sassafras
  • †Sassafras hesperia
• Scaphinotus
• Sceloporus
  • †Sceloporus undulatus
• Sciara
• †Sciophila
• Sciurus
• Scolytus
• †Segestria
• †Selaginella
• †Semanotus
• Sequoia

  • 

    †Sequoia affinis
• Serica
• †Sespia
• †Sialia
• †Sibinia
• †Sifrhippus
• Sigmodon
• †Silpha
• †Silvius
• †Sinonyx – or unidentified comparable form
• Sitona
• †Sitones
• Sitta
  • †Sitta carolinensis
• †Smilax

• 

  †Smilodectes
  • †Smilodectes gracilis
  • †Smilodectes mcgrewi
• Sonoma
• Sorex
  • †Sorex arcticus
  • †Sorex hoyi
• †Sparganium
• Spea
  • †Spea bombifrons
• †Spermophagus
• Spermophilus
  • †Spermophilus elegans – or unidentified comparable form
  • †Spermophilus lateralis
  • †Spermophilus richardsonii
  • †Spermophilus tridecemlineatus
• †Sphegina

• 

  †Sphenocoelus
• Spilogale
  • †Spilogale putorius
• Spizella
  • †Spizella breweri
• †Staphylea
• Staphylinus
• †Stenolophus
• †Stenosphenus
• Stenus
• Sterculia
• Stilbus
• †Stipa
• †Strategus
• †Stylinodon

• 

  †Subhyracodon
• Sylvilagus
  • †Sylvilagus audubonii
• †Symphoromyia
• Syrphus
• †Systena
• †Tabanus
• Tachycineta
  • †Tachycineta bicolor
• Tachyporus
• †Tachys
• Tamiasciurus
  • †Tamiasciurus hudsonicus
  • †Tanysphyrus lemnae
• Tapirus
• Taxidea
  • †Taxidea taxus
• †Teilhardina

• 

  †Teleoceras
• †Tenor – type locality for genus
• †Tenthredo
• †Tetragnatha
• †Tetraonyx
• †Tetraopes
  • †Tetraopes submersus – type locality for species
• †Tetrapus
• Thamnophis

  • 

    †Thamnophis elegans
  • †Thamnophis sirtalis
• †Thanasimus
• †Themira
• †Thomisus
• Thomomys
  • †Thomomys talpoides
• †Thouinia
• †Thuja
• †Ticholeptus
• Tilia
• †Tingis
• Tipula – type locality for genus
• †Titanoeca

• 

  †Titanoides
  • †Titanoides looki
  • †Titanoides primaevus
• †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 cinereoargenteus
• †Ursavus
• Ursus
  • †Ursus americanus
• †Ustatochoerus
• †Vanessa
• †Vauquelinia
• †Viburnum
• †Vicia
• †Villa – type locality for genus
• Vitis
• †Viverravus
• †Vrilletta

• 

  †Vulpavus
• Vulpes
  • †Vulpes velox
  • †Vulpes vulpes
• †Weinmannia
• †Woodwardia
• †Xantholinus
• †Xestobium
• †Xylocopa
• †Xylomya
• †Xyronomys
• †Yumaceras
• †Zamia
• Zelkova
• Zizyphus
• Zonotrichia
  • †Zonotrichia leucophrys
• †Zootermopsis

• 

  †Zygolophodon

References[edit]

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.