List of the prehistoric life of Oregon

This list of the prehistoric life of Oregon contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Oregon.

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

Paleozoic

 * †Acteonina
 * †Acteonina permiana – type locality for species
 * †Albaillella
 * †Albaillella asymmetrica
 * †Albaillella sinuata
 * †Albaillella triangularis – or unidentified comparable form
 * †Alexenia – tentative report
 * †Alexenia occidentalis – type locality for species
 * †Alexenia subquadrata – type locality for species
 * †Anidanthus
 * †Anidanthus minor – type locality for species
 * †Antiquatonia
 * †Antiquatonia cooperi – type locality for species
 * †Antiquatonia reticulata – type locality for species
 * †Arceodomus
 * †Arceodomus sphairikos – type locality for species
 * †Arcochiton
 * †Arcochiton soccus – type locality for species
 * †Bajkuria
 * †Bajkuria rostrata
 * †Bathymyonia
 * †Bathymyonia elongata – type locality for species
 * †Calliprotonia
 * †Calliprotonia inexpectatum – type locality for species
 * †Changmeia
 * †Changmeia bigflatensis – type locality for species
 * †Changmeia bostwicki – type locality for species
 * †Chauliochiton
 * †Chonetes
 * †Chonetes alatus – or unidentified related form
 * †Chonetes pygmoideus – type locality for species
 * †Chonetinella
 * †Cleiothyridina
 * †Cleiothyridina attenuata – type locality for species
 * †Composita
 * †Corwenia – tentative report
 * †Corwenia ashwillensis – type locality for species
 * †Crurithyris
 * Cummingella belisama dorsal light2 CRF.jpg †[[Cummingella]]
 * †Cystolonsdaleia
 * †Cystolonsdaleia berthiaumi – type locality for species
 * †Deflandrella
 * †Deflandrella manica
 * †Derbyia
 * †Diadeloplax
 * †Diadeloplax apiculatus – type locality for species
 * †Dielasma
 * †Dielasma brevicostatum – type locality for species
 * †Dielasma rectimarginatum – type locality for species
 * †Dielasma truncatum – type locality for species
 * †Entactinia
 * †Entactinia modesta
 * †Entactinosphaera
 * †Entactinosphaera cimelia – or unidentified related form
 * †Eoparafusulina
 * †Follicucullus
 * †Follicucullus charveti
 * †Follicucullus monacanthus
 * †Follicucullus scholasticus
 * †Follicucullus ventricosus
 * †Gryphochiton
 * †Gryphochiton planoplata
 * †Haplentactinia – tentative report
 * †Haplentactinia ichikawai
 * †Hegleria
 * †Hegleria mammilla
 * †Heritschioides – tentative report
 * †Himathyris
 * †Himathyris gerardi
 * †Homeochiton – type locality for genus
 * †Homeochiton triangularis – type locality for species
 * †Hustedia
 * †Ishigaum
 * †Ishigaum trifustis
 * †Kashiwara
 * †Kashiwara magna
 * †Kleopatrina
 * †Kleopatrina magnifica – or unidentified comparable form
 * †Kochiproductus
 * †Kochiproductus porrectus – or unidentified comparable form
 * †Kochiproductus transversus – type locality for species
 * †Krotovia
 * †Krotovia barenzi – or unidentified related form
 * †Krotovia oregonensis – type locality for species
 * †Krotovia parva – type locality for species
 * †Krotovia pustulata
 * †Kuvelousia
 * †Kuvelousia leptosa – type locality for species
 * †Latentibifistula
 * †Latentibifistula asperspongiosa – or unidentified related form
 * †Latentifistula
 * †Latentifistula crux – or unidentified related form
 * †Latentifistula patagilaterala
 * †Latentifistula texana
 * †Leptodus – tentative report
 * †Linoproductus
 * †Linoproductus lutkewitschi – or unidentified comparable form
 * †Marginifera – tentative report
 * †Marginifera brevisulcata – type locality for species
 * †Marginifera costellata – type locality for species
 * †Marginifera multicostellata – type locality for species
 * †Marginifera profundosulcata – type locality for species
 * †Martinia
 * †Martinia berthiaumei – type locality for species
 * †Meekella
 * †Monodiexodina – tentative report
 * †Nazarovella
 * †Nazarovella gracilis
 * †Neoalbaillella
 * †Neoalbaillella pseudogrypus
 * Trigonotretidae - Neospirifer ravana.JPG †[[Neospirifer]]
 * †Petalaxis
 * †Petalaxis occidentalis – type locality for species
 * †Polydiexodina
 * †Polydiexodina oregonensis
 * †Praedeflandrella
 * †Probolionia
 * †Probolionia elongata – type locality for species
 * †Probolionia posteroreticulata – type locality for species
 * †Proboscidella – tentative report
 * †Proboscidella carinata – type locality for species
 * †Protowentzelella
 * †Pseudoalbaillella
 * †Pseudoalbaillella fusiformis
 * †Pseudoalbaillella globosa – or unidentified related form
 * †Pseudoalbaillella lomentaria – or unidentified comparable form
 * †Pseudoalbaillella longicornis – or unidentified related form
 * †Pseudoalbaillella scalprata
 * †Pseudotormentus
 * †Pseudotormentus kamigoriensis
 * †Pterochiton
 * †Punctospirifer
 * †Quinqueremis
 * †Quinqueremis robusta – or unidentified related form
 * †Rhipidomella
 * †Rhynchopora
 * †Rhynchopora magna – type locality for species
 * †Rostranteris
 * †Rostranteris merriami – type locality for species
 * †Rostranteris sulcatum – type locality for species
 * †Schwagerina
 * Siphonodendron400.JPG †[[Siphonodendron]] – tentative report
 * †Spiriferella
 * †Spiriferella pseudodraschei – type locality for species
 * †Spiriferellina
 * †Spiriferellina pauciplicata – type locality for species
 * †Stenoscisma
 * †Stenoscisma americanum – type locality for species
 * †Stenoscisma biplicatoideum – type locality for species
 * †Stenoscisma mutabile
 * †Stenoscisma mutabilis
 * †Stenoscisma plicatum – or unidentified comparable form
 * †Stigmosphaerostylus
 * †Stigmosphaerostylus itsukaichiensis
 * †Tiramnia
 * †Tiramnia semiglobosa – or unidentified related form
 * †Triplanospongos
 * †Triplanospongos dekkasensis
 * †Waagenoconcha
 * †Waagenoconcha parvispinosa – type locality for species
 * †Wellerella
 * †Wellerella multiplicata – type locality for species
 * †Wilsonastraea
 * †Wilsonastraea ochocoensis – type locality for species
 * †Yakovlevia
 * †Yakovlevia brevisulcata
 * †Yakovlevia transversa – type locality for species
 * †Yokoyamaella – tentative report
 * †Yokoyamaella oregonensis – type locality for species

Selected Mesozoic taxa of Oregon

 * †Acanthodiscus
 * Inoceramidae - Inoceramus sulcatus.JPG †[[Actinoceramus]]
 * †Anahamulina
 * †Anatropites
 * †Arcestes
 * †Arietoceltites
 * Astarte
 * †Bennettazhia
 * †Bennettazhia oregonensis – type locality for species
 * Cadulus
 * †Calycoceras
 * Cardinia
 * Cenoceras NT.jpg †[[Cenoceras]]
 * Chlamys
 * †Cleoniceras – tentative report
 * †Corum
 * †Crioceratites
 * Dentalium
 * †Gervillia
 * †Gryphaea
 * †Gryphaea arcuataeformis
 * †Hoploparia
 * †Hypophylloceras
 * Inoceramus steenstrup, world's largest fossil mollusk.jpg †[[Inoceramus]]
 * †Kilianella
 * †Lantus
 * Lima
 * †Lissodus
 * † Loffa
 * Lopha
 * †Lucina
 * †Lyelliceras
 * †Lytoceras
 * †Mantelliceras
 * †Metapolygnathus
 * Milax
 * †Modiolus
 * Myophorella-1.jpg †[[Myophorella]]
 * †Myophorella argo – or unidentified comparable form
 * †Neogondolella
 * †Nerinea
 * †Olcostephanus
 * †Ophthalmidium
 * Ostrea
 * †Otoscaphites
 * †Pachus – tentative report
 * †Pachydiscus
 * †Peronidella
 * Pholadomya
 * †Phylloceras
 * †Phyllopachyceras
 * †Plagiostoma – tentative report
 * †Platymya
 * Plicatula
 * †Radium – type locality for genus
 * †Scalarites
 * †Scaphites
 * Species of Shastasaurus.jpg †[[Shastasaurus]]
 * †Shastasaurus pacificus – or unidentified comparable form
 * †Spitidiscus
 * †Thamnasteria
 * †Tragodesmoceras
 * †Trigonia
 * †Trigonia montanaensis
 * Turritella
 * †Tutcheria
 * Venericardia
 * †Vermiceras
 * †Xiphotheca
 * †Zoneait – type locality for genus

Selected Cenozoic taxa of Oregon

 * Abies
 * †Acamptogenotia
 * Acanthocardia
 * Abies
 * †Acamptogenotia
 * Acanthocardia
 * Acer
 * Acmaea
 * Acritohippus isonesus.jpg †[[Acritohippus]]
 * †Acritohippus isonesus
 * Acteon
 * †Actinidia
 * †Actinidia oregonensis
 * Admete
 * Aechmophorus
 * †Aechmophorus occidentalis
 * †Aesculus
 * Aetiocetus BW.jpg †[[Aetiocetus]] – type locality for genus
 * †Aetiocetus cotylalveus – type locality for species
 * Aforia
 * Agelaius – tentative report
 * †Agriochoerus
 * Aix
 * †Aix sponsa
 * Alangium
 * Alnus
 * †Alnus heterodonta
 * Amebelodon fricki.jpg †[[Amebelodon]]
 * Amelanchier
 * Ammospermophilus
 * Ampelocissus
 * †Amphicyon
 * †Amphicyon frendens
 * †Amphicyon galushai – or unidentified comparable form
 * Amphissa
 * †Ampullina
 * †Anabernicula
 * Anadara
 * †Anamirta
 * Anas
 * †Anas acuta
 * †Anas americana
 * †Anas boschas
 * †Anas carolinensis
 * Northern Shoveler by Dan Pancamo.jpg, or northern shoveler]] †Anas clypeata''
 * †Anas cyanoptera
 * †Anas discors
 * †Anas platyrhynchos
 * Ancilla
 * Anona
 * Anser
 * †Anser albifrons
 * †Anser condoni – type locality for species
 * Antillophos
 * Antilocapra
 * †Antilocapra americana – or unidentified comparable form
 * Aphananthe
 * †Aphelops
 * Aquila
 * †Aquila chrysaetos
 * Arbacia
 * †Archaeocyon
 * †Archaeohippus
 * †Archaeotherium
 * Architectonica
 * †Arctodus
 * Ardea
 * †Ardea herodias
 * Argobuccinum
 * †Ascosphaera
 * Astraea
 * Astreopora
 * Astropecten
 * †Aturia
 * †Aucuba
 * Aythya
 * †Aythya marila
 * Balaena
 * Balaenoptera
 * Balaenoptera-acutorostrata.jpg †[[Balaenoptera acutorostrata]] – or unidentified comparable form
 * Balanophyllia
 * †Balanophyllia elegans
 * Balanus
 * Bartramia
 * †Basirepomys
 * Bathybembix
 * Bathytoma
 * Bela
 * Betula
 * Bittium
 * †Bonellitia
 * Boreotrophon
 * †Boreotrophon stuarti
 * Borophagus cropped.png genus Borophagus preying on a camel. Jay Matternes (1964).]] †Borophagus
 * †Borophagus pugnator
 * †Borophagus secundus – or unidentified comparable form
 * Botaurus
 * †Botaurus lentiginosus
 * Brachidontes
 * Branta
 * †Branta bernicla
 * †Branta canadensis
 * Bubo
 * †Bubo virginianus
 * Buccinum
 * †Buccinum strigillatum
 * Bullia
 * †Bumelia – tentative report
 * Cadulus
 * Calliostoma
 * Callista
 * Callorhinus – tentative report
 * †Calocedrus
 * †Calycocarpum
 * Calyptraea
 * Camelops hesternus Sergiodlarosa.jpg †[[Camelops]]
 * †Camelops hesternus
 * Cancellaria
 * Canis
 * †Canis dirus – or unidentified comparable form
 * †Canis edwardii
 * †Canis latrans
 * †Canis lupus – or unidentified comparable form
 * †Carpocyon
 * Carya
 * Caryophyllia
 * Castanea
 * Castanopsis
 * American Beaver.jpg, or North American beaver]] Castor''
 * †Catalpa
 * Cedrela
 * Celtis
 * †Centrocercus
 * †Centrocercus urophasianus
 * Cercidiphyllum
 * Cercis
 * Cerithiopsis
 * †Charitonetta
 * †Charitonetta albeola
 * Chen
 * †Chen rossii
 * Chendytes cropped.png †[[Chendytes]]
 * Chione
 * Chlidonias
 * †Chlidonias nigra
 * Chlorostoma
 * †Choerodon
 * †Chrysodomus
 * Circus
 * Cladrastis
 * Clangula
 * †Clangula hyemalis
 * Cleyera
 * Clinocardium
 * †Clinocardium nuttallii
 * Cochliolepis – tentative report
 * Colaptes
 * †Colodon
 * Columbella
 * Colus islandicus 001.jpg [[Colus]] – tentative report
 * Comitas
 * †Comitas monile
 * †Comitas oregonensis
 * †Comitas spencerensis
 * Comptonia
 * Conomitra
 * Conus
 * †Cophocetus – type locality for genus
 * Corbula
 * †Cormocyon
 * Cornus
 * †Cornus clarnensis
 * †Cornwallius
 * Corvus
 * †Corvus corax
 * †Coryloides
 * †Coryloides hancockii
 * Craigia samara SRIC 01.jpg [[Craigia]]
 * Crataegus
 * Crenella
 * Crepidula
 * †Crepidula adunca
 * †Crepidula grandis – or unidentified comparable form
 * Cryptonatica
 * †Cryptonatica affinis
 * Cryptotis
 * †Cunninghamia
 * Cyclocardia
 * Cygnus
 * †Cygnus paloregonus
 * Cymatium
 * Cynarctoides fossil cropped.png †[[Cynarctoides]]
 * †Cynarctoides lemur
 * †Cynarctoides luskensis – or unidentified comparable form
 * †Cynelos
 * †Daeodon
 * †Dafila acuta
 * †Daphoenodon
 * †Daphoenus
 * †Daphoenus socialis
 * Dasornis emuinus 1.jpg †[[Dasornis]] – or unidentified related form
 * Decodon
 * Dendragapus – type locality for genus
 * Dentalium
 * †Desmatippus
 * †Desmatochoerus
 * †Desmatophoca
 * †Desmatophoca oregonensis
 * †Desmocyon
 * †Desmostylus
 * †Desmostylus hesperus – type locality for species
 * †Diceratherium
 * †Dilophodelphis – type locality for genus
 * †Dinaelurus
 * ExtmDinictis1921-029-11.jpg †[[Dinictis]]
 * †Dinictis cyclops
 * †Diploporus
 * †Diploporus torreyoides
 * †Dipoides
 * †Diprionomys
 * Dipteronia
 * Discinisca
 * Dosinia
 * †Dromomeryx
 * †Dromomeryx borealis
 * †Dyticonastis – type locality for genus
 * †Dyticonastis rensbergeri – type locality for species
 * Echinophoria
 * †Ekgmowechashala
 * †Emmenopterys
 * Enaliarctos emlongi.JPG †[[Enaliarctos]]
 * †Enaliarctos barnesi – type locality for species
 * †Enaliarctos emlongi – type locality for species
 * †Enaliarctos mitchelli
 * †Enaliarctos tedfordi – type locality for species
 * Engelhardtia
 * Enhydra
 * †Enhydrocyon
 * †Ensete
 * †Epicyon
 * †Epicyon haydeni
 * †Epihippus
 * Epitonium
 * †Eporeodon
 * †Equisetum
 * Equus
 * †Erismatura jamaicensis
 * Erolia
 * Ervilia – tentative report
 * †Eucastor
 * Eucyon davisi.JPG-like canine Eucyon]] †Eucyon
 * †Eucyon davisi
 * †Euoplocyon
 * Euphagus
 * †Euphagus cyanocephalus
 * Euspira
 * †Euspira pallida
 * †Eutrephoceras
 * Exbucklandia
 * †Exilia
 * Fagus
 * Falco
 * Ficus
 * Fimbria
 * Flabellum
 * †Floridaceras
 * Florissantia quilchenensis SRIC img1.jpg †[[Florissantia (plant)|Florissantia]]
 * Fothergilla
 * Fraxinus
 * Fulgoraria
 * Fulgurofusus
 * Fulica
 * Fulica americana
 * Fusinus
 * †Gaillardia
 * Gari – tentative report
 * Gemmula
 * †Gentilicamelus
 * Glycymeris
 * †Goedertius – type locality for genus
 * Gomphotherium productum.jpg †[[Gomphotherium]]
 * Granula
 * Gyrineum – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Hadrianus
 * Halesia
 * Haliaeetus
 * †Haliaeetus leucocephalus
 * †Haplohippus
 * †Hemiauchenia – tentative report
 * Heptranchias
 * †Heptranchias howelli
 * Herpetotherium.jpg †[[Herpetotherium]]
 * Hiatella
 * Himantopus
 * †Himantopus mexicanus
 * †Hippotherium
 * †Hoplophoneus
 * †Hovenia
 * Hydrangea
 * †Hypertragulus
 * †Hypohippus
 * †Hypolagus
 * †Hypsidoris
 * †Hypsiops
 * †Hyrachyus
 * Indarctos atticus.jpg †[[Indarctos]]
 * Isurus
 * †Isurus planus
 * Juglans
 * †Kalobatippus
 * †Kardiasperma
 * †Kardiasperma parvum
 * Kellia
 * †Keteleeria
 * †Kolponomos
 * †Kolponomos newportensis – type locality for species
 * Lacuna
 * †Lacuna vincta
 * Larus
 * †Larus argentatus
 * †Larus californicus
 * †Larus philadelphia
 * Lepeta
 * Leptocyon gregorii holotype AMNH 12879.jpg †[[Leptocyon]]
 * Lepus
 * Leukoma
 * †Leukoma staminea
 * Limnodromus
 * †Limnodromus griseus – tentative report
 * Lindera
 * Liquidambar
 * †Lithocarpus
 * Littorina
 * Lophodytes
 * †Lophodytes cucullatus
 * †Lophortyx
 * Lynx
 * Lytechinus
 * [[File:Machairodus aphanistus - Cerro de los Batallones - Museo Arqueológico Regional CAM.JPG|thumb|upright|Fossilized cranium of the Miocene-Pleistocene saber-toothed cat Machairodus]] †[[Machairodus]]
 * †Machilus
 * Macoma
 * †Macoma nasuta
 * Macrocallista
 * Magnolia
 * Mahonia
 * †Malus – or unidentified comparable form
 * †Mammut
 * †Mammut furlongi – type locality for species
 * †Mammuthus
 * Columbian mammoth cropped.png †[[Mammuthus columbi]] – tentative report
 * Marcia
 * Margarites
 * Martes
 * Martesia
 * Mastixia
 * Megachasma
 * †Megalonyx
 * †Megapaloelodus
 * †Megatylopus
 * Melanitta
 * †Melanitta deglandi
 * †Melanitta perspicillata
 * †Meliosma
 * †Meliosma beusekomii
 * †Menispermum – or unidentified comparable form
 * Mergus
 * †Mergus merganser
 * †Mergus serrator
 * Merychippus insignis life restoration.jpg †[[Merychippus]]
 * †Merychyus
 * †Merycochoerus
 * †Merycoides
 * †Merycoidodon
 * †Mesocyon
 * †Mesohippus
 * †Metalopex
 * Metasequoia
 * †Metasequoia occidentalis
 * †Microphallus
 * Microtus
 * †Microtus montanus
 * †Miohippus
 * †Miotapirus
 * Modiolus
 * †Modiolus modiolus
 * Molothrus
 * †Molothrus ater – tentative report
 * †Monosaulax
 * †Moropus
 * Mulinia
 * Mustela
 * †Mya
 * †Mya truncata
 * Myotis – or unidentified comparable form
 * Mytilus
 * †Mytilus californianus
 * †Mytilus edulis
 * †Nanotragulus – or unidentified comparable form
 * Nassarius
 * Natica
 * †Nautilus
 * Nectandra
 * †Neohipparion
 * Neophrontops americanus fossil cropped.jpg [[Neophrontops]]
 * Neotamias
 * †Neurotrichus – tentative report
 * Neverita
 * †Nexuotapirus
 * Nucella
 * †Nucella lamellosa
 * Nucula
 * Numenius
 * †Numenius americanus – tentative report
 * †Nuphar
 * †Nyssa
 * †Nyssa spatulata
 * American pika (ochotona princeps) with a mouthful of flowers.jpg [[Ochotona]]
 * †Ochotona spanglei – type locality for species
 * Ocotea
 * Olar
 * †Oligobunis
 * Olivella
 * †Olivella biplicata
 * †Olivella pedroana
 * Ondatra
 * Opalia
 * †Oreodontoides
 * †Osbornodon
 * †Osmunda
 * Ostrea
 * †Ostrea lurida – or unidentified comparable form
 * Ostrya
 * Palaeocastor BW cropped.png †[[Palaeocastor]]
 * †Palaeolagus
 * †Paleopanax
 * †Paleopanax oregonensis
 * Paliurus
 * Pandora
 * Panopea
 * †Panopea abrupta
 * Panthera
 * †Panthera onca – or unidentified comparable form
 * †Paradaphoenus
 * †Paraenhydrocyon
 * †Paraenhydrocyon josephi
 * †Parahippus
 * †Parahippus leonensis – or unidentified related form
 * San Diego Paramylodon.jpg Paramylodon]] †Paramylodon
 * †Paramylodon harlani
 * †Paratomarctus
 * †Paratylopus
 * †Paronychomys
 * †Paroreodon
 * †Parrotia
 * †Parthenocissus
 * Passalus
 * †Patriofelis
 * †Patriofelis ferox
 * Pekania
 * Pelagornis chilensis EF.jpg †[[Pelagornis]]
 * Pelecanus
 * †Pelecanus erythrorhynchos
 * †Pelecanus erythrorhynchus – tentative report
 * Perognathus
 * Peromyscus
 * †Perse
 * Phalacrocorax
 * †Phalacrocorax auritus – tentative report
 * Phalaropus
 * †Phalaropus lobatus
 * Phalium
 * Phanerolepida
 * †Philotrox
 * †Philotrox condoni
 * †Phlaocyon
 * †Phlaocyon latidens
 * Phoca
 * †Phoca vitulina – or unidentified comparable form
 * Flamingos Laguna Colorada.jpg [[Phoenicopterus]]
 * †Phoenicopterus copei – type locality for species
 * Pinus
 * Pitar
 * †Plagiolophus
 * Platanus
 * †Platygonus
 * †Pleiolama
 * †Plesiocolopirus
 * †Plesiogulo
 * †Pliocyon – or unidentified comparable form
 * Pliohippus Pernix.jpg †[[Pliohippus]]
 * †Plionarctos
 * Podiceps
 * †Podiceps auritus – tentative report
 * Podilymbus
 * †Podilymbus podiceps
 * †Pododesmus macrochisma
 * †Pogonodon
 * Polinices
 * †Polypodium – or unidentified comparable form
 * †Pontolis – type locality for genus
 * †Pontolis magnus – type locality for species
 * †Potamogeton
 * †Pristichampsus
 * †Procamelus
 * †Promartes – or unidentified comparable form
 * †Promerycochoerus
 * Propeamussium
 * Protitanops NT small.jpg †[[Protitanops]]
 * †Protolabis – or unidentified comparable form
 * Protothaca
 * Prunus
 * †Psephophorus – tentative report
 * †Pseudaelurus
 * †Pseudotsuga
 * Pteris
 * Pterocarya
 * †Pteronarctos – type locality for genus
 * Puncturella
 * †Puncturella galeata
 * Purpura
 * Pyramidella – tentative report
 * Pyrenacantha
 * Pears.jpg †[[Pyrus]]
 * Quercus
 * Querquedula
 * Raja
 * Rallus
 * †Rallus limicola
 * Recurvirostra
 * †Recurvirostra americana
 * Retusa
 * Rhabdus
 * †Rhizocyon
 * Rhus
 * †Rhus rooseae
 * †Ribes
 * Rimella
 * Rosa
 * Blackberries on bush.jpg [[Rubus]]
 * Sabal
 * †Sabia
 * Salix
 * Sanguinolaria
 * Sassia
 * Saxidomus
 * †Saxidomus gigantea
 * Scapanus
 * †Scapanus latimanus
 * Scaphander
 * †Schisandra
 * Schizaster
 * Sciurus
 * †Scutella
 * Semele
 * Sequoia
 * †Sequoia affinis
 * Siliqua
 * †Siliqua patula
 * †Simocetus – type locality for genus
 * Simocyon portrait.png †[[Simocyon]]
 * Sinum
 * Solariella
 * Solemya
 * Solen
 * †Somatochlora
 * Spermophilus
 * Spirotropis
 * Spisula
 * Spizaetus
 * †Steneofiber
 * Stercorarius
 * Sterna
 * †Sterna elegans – tentative report
 * †Sterna forsteri
 * Sthenictis1.JPG [[Sthenictis]]
 * Strongylocentrotus
 * Sturnella
 * †Suavodrillia
 * †Subhyracodon
 * Sveltella
 * Symplocos
 * Tapirus
 * †Tapirus californicus – or unidentified comparable form
 * Tapiscia
 * Taranis
 * Taxidea
 * †Taxus
 * †Taxus masonii
 * Tegula
 * Teleoceras Horsfall cropped.jpg †[[Teleoceras]]
 * Tellina
 * †Temnocyon
 * †Tephrocyon
 * Terminalia
 * †Tetraclinis
 * Thais
 * Thesbia – report made of unidentified related form or using admittedly obsolete nomenclature
 * Thomomys
 * †Thomomys townsendii
 * Thracia
 * Hypsiops breviceps Exhibit Museum of Natural History cropped.jpg †[[Ticholeptus]]
 * Tilia
 * †Torreya
 * †Torreya clarnensis
 * Totanus
 * †Toxicodendron
 * Trema
 * Tresus
 * Trichotropis
 * Trochita
 * Trophon geversianus acordonada 002.jpg [[Trophon]]
 * †Tsuga
 * Turricula
 * Turris
 * Turritella
 * †Tylocephalonyx
 * Tympanuchus
 * †Tympanuchus pallidicinctus
 * Ulmus
 * †Ursavus
 * Venericardia
 * †Viburnum
 * Vitis
 * Vulpes
 * Xema
 * Yoldia
 * †Yoldia cooperii – or unidentified comparable form
 * Zalophus
 * Lion de mer Amnéville 01.jpg †[[Zalophus californianus]]
 * Zelkova