List of the Cenozoic life of Oregon

This list of the Cenozoic life of Oregon contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Oregon and are between 66 million and 10,000 years of age.

A

 * Abies
 * †Abies chaneyi
 * †Abies sonomensis
 * Turridae - Acamptogenotia intorta.JPG †[[Acamptogenotia]]
 * †Acamptogenotia nodulosa
 * †Acamptogenotia tessellata
 * Acanthocardia
 * †Acanthocardia brewerii
 * Acer
 * †Acer ashwillii
 * †Acer cranei
 * †Acer glabroides
 * †Acer kluckingii
 * †Acer manchesteri
 * †Acer oligomedianum
 * †Acer osmonti
 * †Acer osmontii
 * †Acericecis
 * †Acericecis chaneyi – type locality for species
 * †Achaenodon
 * †Achaenodon fremdi – type locality for species
 * †Achlyoscapter
 * †Achlyoscapter longirostris
 * Acila
 * †Acila conradi
 * †Acila decisa
 * †Acila gettysburgensis
 * †Acila nehalemensis
 * †Acila shumardi
 * †Acila trilineata
 * Acmaea
 * †Acmaea vokesi
 * Acritohippus isonesus.jpg †[[Acritohippus]]
 * †Acritohippus isonesus
 * Acteon
 * †Acteon chehalisensis
 * †Acteon parvum
 * †Actinidia
 * †Actinidia oregonensis
 * †Acutostrea
 * †Acutostrea idriaensis
 * †Adeloblarina
 * †Adeloblarina berklandi
 * Admete
 * †Admete umbilicata
 * Aechmophorus
 * †Aechmophorus occidentalis
 * †Aesculus
 * Aetiocetus BW.jpg †[[Aetiocetus]] – type locality for genus
 * †Aetiocetus cotylalveus – type locality for species
 * †Aetiocetus weltoni – type locality for species
 * Aforia
 * †Aforia campbelli
 * †Aforia clallamensis – or unidentified comparable form
 * †Agasoma
 * †Agasoma gravidum
 * Agelaius – tentative report
 * Agriochoerus.jpg †[[Agriochoerus]]
 * †Agriochoerus guyotianus
 * Aix
 * †Aix sponsa
 * Alangium
 * †Alangium eydei
 * †Alangium rotundicarpum
 * †Alangium thomae
 * †Allocyon
 * †Allocyon loganensis
 * †Allomys
 * †Allomys simplicidens
 * †Alluvisorex
 * †Alluvisorex arcadentes
 * Alnus
 * †Alnus carpinoides
 * †Alnus heterodonta
 * †Alnus newberryi
 * †Alwoodia
 * †Alwoodia magna
 * Amaea
 * †Amaea dickersoni – or unidentified related form
 * Amebelodon fricki.jpg †[[Amebelodon]]
 * Amelanchier
 * †Amelanchier covea
 * †Amelanchier grayi
 * †Ameranella
 * †Ameranella terrysmithae – type locality for species
 * Ammospermophilus
 * †Ammospermophilus junturensis
 * Ampelocissus
 * †Ampelocissus auriforma
 * †Ampelocissus rooseae
 * †Ampelocissus scottii
 * Amphicyon-ingens reconstruction.jpg †[[Amphicyon]]
 * †Amphicyon frendens
 * †Amphicyon galushai – or unidentified comparable form
 * Amphissa
 * †Amphissa corrugata
 * †Ampullina
 * †Ampullina oregonensis
 * †Anabernicula
 * Anadara
 * †Anadara devincta
 * †Anamirta
 * †Anamirta leiocarpa
 * 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
 * †Ancilla vernisa – type locality for species
 * †Anechinocardium
 * †Anechinocardium lorenzanum
 * †Anechinocardium weaveri
 * †Ankistrosperma
 * †Ankistrosperma spitzerae
 * Anona
 * †Anona preretriculata
 * †Anonaspermum
 * †Anonaspermum bonesii
 * †Anonaspermum pulchrum
 * †Anonaspermum rotundum
 * †Anonymocarpa
 * †Anonymocarpa ovoidea
 * †Anorthoscutum
 * †Anorthoscutum oregonensis
 * Anser
 * †Anser albifrons
 * †Anser condoni – type locality for species
 * †Antecalomys
 * †Antecalomys valensis
 * Antillophos
 * †Antillophos dumbleana
 * Antilocapra
 * †Antilocapra americana – or unidentified comparable form
 * †Aperiploma
 * †Aperiploma bainbridgensis
 * Aphananthe
 * †Aphananthe maii
 * †Aphelops
 * †Aphelops megalodus
 * Aquila
 * †Aquila chrysaetos
 * †Aquila pliogryps – type locality for species
 * †Aquila sodalis – type locality for species
 * Arbacia
 * †Arbacia abiquaensis – type locality for species
 * †Archaeocyon
 * †Archaeocyon pavidus
 * †Archaeohippus
 * †Archaeohippus ultimus
 * †Archaeolagus
 * †Archaeolagus macrocephalus – or unidentified comparable form
 * †Archaeotherium
 * Architectonica
 * †Architectonica blanda
 * Archoplites
 * †Archoplites langrellorum – type locality for species
 * ArctodusSimusReconstruct.jpg †[[Arctodus]]
 * †Arctomyoides
 * †Arctomyoides oregonensis
 * Ardea
 * †Ardea herodias
 * †Ardea paloccidentalis – type locality for species
 * Argobuccinum
 * †Argobuccinum cammani
 * †Argobuccinum coosense
 * †Argobuccinum jeffersonense
 * †Argobuccinum oregonense
 * †Ascosphaera
 * †Ascosphaera eocenis
 * †Asterocarpinus
 * †Asterocarpinus chaneyi
 * †Asterocarpinus perplexans
 * Astraea
 * †Astraea inequalis
 * Astreopora
 * †Astreopora occidentalis – type locality for species
 * Astropecten
 * †Atriaecarpum
 * †Atriaecarpum clarnense
 * Aturia eocene puglia.jpg †[[Aturia]]
 * †Aturia angustata
 * †Aturia grandior – or unidentified comparable form
 * †Aucuba
 * †Aucuba smileyi
 * †Axinosperma
 * †Axinosperma agnostum
 * Aythya
 * †Aythya marila

B

 * Balaena
 * Balaenoptera
 * Balaenoptera-acutorostrata.jpg †[[Balaenoptera acutorostrata]] – or unidentified comparable form
 * Balanophyllia
 * †Balanophyllia elegans
 * Balanus
 * Balcis
 * †Barbouromeryx
 * Bartramia
 * †Bartramia umatilla – type locality for species
 * †Basirepomys
 * †Basirepomys pliocenicus – or unidentified comparable form
 * †Basirepomys romensis – type locality for species
 * Bathybembix bairdii 1.jpg [[Bathybembix]]
 * †Bathybembix columbiana
 * †Bathybembix nitor – type locality for species
 * Bathytoma
 * †Bathytoma gabbiana
 * †Beckerosperma
 * †Beckerosperma ovalicarpa
 * Bela
 * †Bela tabulata
 * Betula
 * †Betula angustifolia
 * Bittium
 * †Bittium eschrichti
 * †Bonellitia
 * †Bonellitia paucivaricata
 * †Bonellitia smithwickensis – type locality for species
 * †Bonellitia tumida – type locality for species
 * †Bonesia
 * †Bonesia spatulata
 * Boreotrophon
 * †Boreotrophon gracilis
 * †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
 * †Bouromeryx
 * †Bouromeryx americanus – or unidentified comparable form
 * †Bouromeryx submilleri
 * Brachidontes
 * †Brachidontes cowlitzensis
 * Branta
 * †Branta bernicla
 * †Branta canadensis
 * †Branta hypsibata – tentative report
 * †Branta hypsibatus
 * †Branta propinqua – type locality for species
 * †Bruclarkia
 * †Bruclarkia columbiana
 * †Bruclarkia columbianum
 * †Bruclarkia oregonensis
 * †Bruclarkia vokesi
 * Bubo
 * Bubo virginianus 06.jpg †[[Bubo virginianus]]
 * Buccinum
 * †Buccinum strigillatum
 * Bullia
 * †Bullia bogachielia
 * †Bumelia – tentative report
 * †Bumelia? subangularis
 * †Bursericarpum
 * †Bursericarpum oregonense

C

 * Cadulus
 * Calliostoma
 * †Calliostoma cammani
 * †Calliostoma costatum
 * Callista
 * †Callista conradiana
 * Northfursealbull.jpg, or northern fur seal]] Callorhinus'' – tentative report
 * ] †Calocedrus
 * †Calocedrus schornii
 * †Calycocarpum
 * †Calycocarpum crassicrustae
 * Calyptraea
 * †Calyptraea diegoana
 * †Calyptraea fastigiata
 * †Calyptraea inornata
 * †Calyptraea sookensis
 * †Camelops
 * †Camelops hesternus
 * Cancellaria
 * †Cancellaria oregonensis
 * †Cancellaria siletzensis
 * Canis
 * Canis lupus & dirus.jpg, the grey wolf, to scale with a fossilized skeleton of the Pleistocene wolf Canis dirus, or dire wolf]] †Canis dirus'' – or unidentified comparable form
 * †Canis edwardii
 * †Canis latrans
 * †Canis lupus – or unidentified comparable form
 * Cardiomya
 * †Cardiomya anaticepsella – type locality for species
 * †Cardiomya pavascotti
 * †Carpocyon
 * †Carpolithus
 * †Carpolithus bellisperma
 * Carya Morton 29-U-10.jpg [[Carya]]
 * Caryophyllia
 * †Caryophyllia oregonensis – type locality for species
 * Castanea
 * †Castanea basidentata
 * Castanopsis
 * †Castanopsis crepetii
 * †Castanopsis longifolius
 * Castor
 * †Catalpa
 * Cedrela
 * †Cedrela merrillii
 * †Cedrelospermum
 * †Cedrelospermum lineatum
 * Celleporina
 * Celtis
 * †Celtis burnhamae
 * †Centrocercus
 * †Centrocercus urophasianus
 * Cercidiphyllum
 * †Cercidiphyllum crenatum
 * Red bud 2009.jpg [[Cercis]]
 * †Cercis maurerae
 * Cerithiopsis
 * †Cerithiopsis preussi – or unidentified comparable form
 * †Chandlera
 * †Chandlera lacunosa
 * †Charitonetta
 * †Charitonetta albeola
 * Chen
 * †Chen hyperborea
 * †Chen rossii
 * Chendytes cropped.png †[[Chendytes]]
 * Chione
 * †Chione ensifera
 * †Chione securis
 * Chlidonias
 * †Chlidonias nigra
 * Chlorostoma
 * †Chlorostoma pacificum
 * †Choerodon
 * †Choerodon caninus
 * †Chrysodomus
 * †Chrysodomus bairdi
 * †Chrysodomus imperialis
 * †Chrysodomus nodiferus
 * †Chrysodomus phoenicus
 * †Chrysodomus tabulatus
 * Ciliatocardium
 * †Ciliatocardium coosense
 * †Cinnamomophyllum
 * †Cinnamomophyllum bendirei
 * Circus
 * †Circus eyaneus
 * Cladrastis
 * †Cladrastis oregonensis
 * Clangula
 * Long-tailed-duck.jpg †[[Clangula hyemalis]]
 * Cleyera
 * †Cleyera grotei
 * Clinocardium
 * †Clinocardium meekianum
 * †Clinocardium nuttallii
 * †Clivuloturris
 * †Clivuloturris levis – or unidentified comparable form
 * Cochliolepis – tentative report
 * †Cochliolepis schoonerensis
 * Colaptes
 * †Colaptes cafer
 * †Colodon
 * Columbella
 * †Columbella gausapata
 * Colus islandicus 001.jpg [[Colus]] – tentative report
 * †Colus precursor
 * Colymbus
 * †Colymbus holbellii
 * †Colymbus nigricollis
 * †Colymbus oligocaenus – type locality for species
 * †Colymbus parvus
 * †Comicilabium
 * †Comicilabium atkinsii
 * Comitas
 * †Comitas monile
 * †Comitas oregonensis
 * †Comitas spencerensis
 * †Comminicarpa
 * †Comminicarpa friisae
 * Comptonia
 * †Comptonia columbiana
 * †Conchocele
 * †Conchocele bathyaulax
 * †Conchocele bisecta
 * †Conchocele taylori
 * Conomitra
 * †Conomitra vernoniana – type locality for species
 * Conus pelagicus Brocchi 1814Pliocene Cyprus.jpg [[Conus]]
 * †Conus armentrouti – type locality for species
 * †Conus weltoni – type locality for species
 * †Copemys
 * †Copemys barstowensis
 * †Copemys esmeraldensis
 * †Copemys pagei
 * †Cophocetus – type locality for genus
 * †Cophocetus oregonensis – type locality for species
 * Corbula
 * †Corbula dickersoni
 * †Cormocyon
 * †Cormocyon copei
 * Cornus
 * †Cornus clarnensis
 * †Cornwallius
 * †Cornwallius sookensis
 * Corvus
 * †Corvus annectens – type locality for species
 * †Corvus corax
 * †Coryloides
 * †Coryloides hancockii
 * Craigia samara SRIC 01.jpg [[Craigia]]
 * †Craigia oregonensis
 * Crataegus
 * †Crataegus merriamii
 * †Crataegus newberryi
 * Crenella
 * †Crenella porterensis – or unidentified comparable form
 * Crepidula
 * †Crepidula adunca
 * †Crepidula grandis – or unidentified comparable form
 * †Crepidula praerupta
 * †Crepidula princeps
 * †Crepidula ungana
 * †Cruciptera
 * †Cruciptera simsonii
 * †Crusafontina
 * †Crusafontina minima
 * Cryptomya
 * †Cryptomya californica
 * Cryptonatica
 * †Cryptonatica affinis
 * †Cryptonatica oregonensis
 * †Cryptonatica pittsburgensis
 * Cryptotis parva cropped.png, or small-eared shrew]] Cryptotis''
 * †Cryptotis adamsi
 * †Cuneisemen
 * †Cuneisemen truncatum
 * †Cunninghamia
 * †Cunninghamia chaneyi
 * †Cupidinimus
 * †Cupidinimus magnus
 * †Curvitinospora
 * †Curvitinospora formanii
 * Cyclocardia
 * †Cyclocardia hannibali – or unidentified comparable form
 * †Cyclocardia moniligena
 * †Cyclocardia subtenta
 * †Cyclocardia ventricosa
 * †Cyclotella
 * †Cyclotella jonesii – type locality for species
 * Cygnus
 * †Cygnus paloregonus
 * Cymatium
 * †Cymatium pacificum
 * †Cynarctoides
 * †Cynarctoides lemur
 * †Cynarctoides luskensis – or unidentified comparable form
 * Cynelos lemanensis.JPG †[[Cynelos]]
 * †Cynelos sinapius
 * †Cynorca
 * †Cyperacites

D

 * †Daeodon
 * Dafila
 * †Dafila acuta
 * †Daphoenodon
 * †Daphoenodon robustum
 * †Daphoenus
 * †Daphoenus socialis
 * †Dasmia
 * †Dasmia americana – type locality for species
 * Dasornis emuinus 1.jpg †[[Dasornis]] – or unidentified related form
 * †Davisicarpum
 * †Davisicarpum limacioides
 * Decodon
 * †Decodon brownii
 * Delectopecten
 * †Delectopecten peckhami
 * Dendragapus – type locality for genus
 * †Dendragapus gillii – type locality for species
 * †Dendrogapus
 * †Dendrogapus lucasi
 * †Dendrogapus nanus
 * Dentalium
 * †Dentalium laneensis
 * †Dentalium pseudonyma
 * †Dentalium rectius
 * †Dentalium stentor
 * †Dentisemen
 * †Dentisemen parvum
 * †Desmatippus
 * †Desmatippus avus
 * †Desmatochoerus
 * †Desmatochoerus leidyi
 * †Desmatolagus
 * †Desmatophoca
 * †Desmatophoca oregonensis
 * †Desmocyon
 * †Desmocyon thomsoni
 * Desmostylus2DB.jpg †[[Desmostylus]]
 * †Desmostylus hesperus – type locality for species
 * †Deviacer
 * †Deviacer wolfei
 * †Diceratherium
 * †Diceratherium annectens
 * †Diceratherium armatum
 * †Dilophodelphis – type locality for genus
 * †Dilophodelphis fordycei – type locality for species
 * †Dinaelurus
 * †Dinaelurus crassus
 * ExtmDinictis1921-029-11.jpg †[[Dinictis]]
 * †Dinictis cyclops
 * †Diplobunops
 * †Diplobunops kardoula – type locality for species
 * Diploclisia
 * †Diploclisia auriformis
 * †Diplodipelta – type locality for genus
 * †Diplodipelta miocenica
 * †Diplodipelta reniptera
 * Diplodonta
 * †Diplodonta parilis
 * †Diploporus
 * †Diploporus torreyoides
 * †Dipoides
 * †Dipoides smithi – type locality for species
 * †Dipoides stirtoni – type locality for species
 * †Dipoides vallicula
 * †Diprionomys
 * †Diprionomys parvus
 * Dipteronia
 * Discinisca
 * †Discinisca oregonensis
 * †Domninoides
 * Dosinia
 * †Dosinia whitneyi
 * Dromomeryx borealis.jpeg †[[Dromomeryx]]
 * †Dromomeryx borealis
 * †Durocarpus
 * †Durocarpus cordatus
 * †Dyticonastis – type locality for genus
 * †Dyticonastis rensbergeri – type locality for species

E

 * Echinophoria
 * †Echinophoria dalli
 * †Ectinochilus
 * †Ectinochilus macilenta
 * †Ekgmowechashala
 * †Emmenopterys
 * †Emmenopterys dilcheri
 * 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
 * †Engelhardtia olsoni
 * Enhydra
 * †Enhydrocyon
 * †Enhydrocyon prolatus
 * †Enhydrocyon stenocephalus
 * Ennucula
 * †Ennucula nuculana
 * Ensete superbum.jpg †[[Ensete]]
 * †Ensete oregonense – type locality for species
 * †Entoptychus
 * †Entoptychus individens
 * †Entoptychus planifrons
 * †Entoptychus wheelerensis
 * †Eohypserpa
 * †Eohypserpa scottii
 * †Eopleurotoma
 * †Eopleurotoma ornata – or unidentified related form
 * †Eosiphonalia
 * †Eosiphonalia oregonensis
 * Epacroleda – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Epacroleda epacris
 * Epicyon haydeni skeleton.jpg †[[Epicyon]]
 * †Epicyon haydeni
 * †Epicyon saevus
 * †Epihippus
 * †Epihippus gracilis
 * Epilucina
 * †Epilucina washingtoniana
 * Epitonium
 * †Epitonium condoni
 * †Epitonium hindsii
 * †Epitonium keaseyense
 * †Epitonium keaseyensis
 * †Epitonium schencki
 * †Epitonium wyattdurhami – type locality for species
 * Eporeodon.JPG mammal Eporeodon]] †Eporeodon
 * †Eporeodon occidentalis
 * †Eporeodon trigonocephalus
 * †Equisetum
 * Equus
 * †Equus pacificus
 * †Eremochen – type locality for genus
 * †Eremochen russelli – type locality for species
 * †Erismatura
 * †Erismatura jamaicensis
 * Erolia
 * †Erolia melanotos
 * Ervilia – tentative report
 * †Ervilia oregonensis
 * †Eschatius
 * †Eubrontotherium – type locality for genus
 * †Eubrontotherium clarnoensis – type locality for species
 * †Eucastor
 * †Eucastor malheurensis
 * Eucyon davisi.JPG-like canine Eucyon]] †Eucyon
 * †Eucyon davisi
 * †Euoplocyon
 * †Euoplocyon brachygnathus
 * Euphagus
 * †Euphagus cyanocephalus
 * Eurytellina
 * †Eurytellina aduncanasa
 * Euspira
 * †Euspira clementensis
 * †Euspira hotsoni
 * †Euspira nuciformis
 * †Euspira pallida
 * †Eutrephoceras
 * †Eutrephoceras oregonense
 * Exbucklandia
 * †Exbucklandia oregonensis
 * †Exilia
 * †Exilia bentsonae – type locality for species
 * †Exilia lincolnensis

F

 * Fagus
 * †Fagus pacifica
 * Falco
 * †Falco oregonus – type locality for species
 * Felaniella
 * †Felaniella snavelyi
 * Ferminoscala
 * †Ferminoscala dickersoni
 * †Ferrignocarpus
 * †Ferrignocarpus bivalvis
 * Sycomoros old.jpg [[Ficus]]
 * †Ficus modesta
 * †Ficus ocoyanum – or unidentified comparable form
 * Fimbria
 * †Fimbrialata
 * †Fimbrialata wingii
 * Flabellum
 * †Flabellum oregonense – type locality for species
 * †Flectorivus
 * †Flectorivus microdontos
 * †Florentiamys
 * †Floridaceras
 * †Floridaceras whitei
 * Florissantia species SRIC 01.jpg †[[Florissantia (plant)|Florissantia]]
 * †Florissantia ashwillii – type locality for species
 * †Florissantia speirii
 * †Fokieniopsis
 * †Fokieniopsis praedecurrens
 * †Fortunearites
 * †Fortunearites endressii
 * †Fothergilla
 * †Fothergilla praeovata
 * †Fragarites
 * †Fragarites ramificans
 * †Fraxinus
 * †Fraxinus coulteri
 * Fulgoraria
 * †Fulgoraria indurata
 * Fulgurofusus
 * †Fulgurofusus serratus – type locality for species
 * Fulica
 * American coot - June 2013.jpg [[Fulica americana]]
 * †Fulica infelix – type locality for species
 * †Fulica minor – type locality for species
 * †Fusinis
 * †Fusinis dilleri – type locality for species
 * Fusinus
 * †Fusinus coosensis
 * †Fusinus dilleri

G

 * †Gagaria
 * †Gagaria crenularis – type locality for species
 * Gaillardia in Aspen (91273).jpg †[[Gaillardia]]
 * †Gaillardia thomsoni
 * Gari – tentative report
 * †Gari furcata – or unidentified related form
 * Gemmula
 * †Gemmula bentsonae
 * †Gemmula facula
 * †Gemmula rockcreekensis
 * †Gentilicamelus
 * †Gentilicamelus cameloides – type locality for species
 * †Gentilicamelus sternbergi
 * Glaucionetta
 * †Glaucionetta islandica
 * †Globulicarpium
 * †Globulicarpium levigatum
 * Glycymeris
 * †Glycymeris major
 * †Glycymeris sagittata
 * †Glycymeris septentrionalis
 * Glyptocidaris
 * †Goedertius – type locality for genus
 * †Goedertius oregonensis – type locality for species
 * Gomphotherium productum.jpg †[[Gomphotherium]]
 * †Gomphotherium obscurum
 * †Goniodontomys
 * †Goniodontomys disjunctus – type locality for species
 * Granula
 * †Granula profundorum – type locality for species
 * Gyrineum – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Gyrineum dilleri

H

 * †Hadrianus
 * Halesia
 * †Halesia oregona
 * Haliaeetus
 * †Haliaeetus leucocephalus
 * Haplohippus texanus.jpg †[[Haplohippus]]
 * †Haplohippus texanus
 * †Haplomys
 * †Haplomys liolophus
 * †Hemiauchenia – tentative report
 * †Hemipsalodon
 * †Hemipsalodon grandis
 * Hemithiris
 * †Hemithiris psittacea
 * †Heptacodon
 * Heptranchias
 * †Heptranchias howelli
 * Herpetotherium.jpg †[[Herpetotherium]]
 * †Herpetotherium merriami
 * †Hesperhys – or unidentified comparable form
 * †Hesperogaulus
 * †Hesperogaulus gazini – type locality for species
 * †Hesperogaulus wilsoni – type locality for species
 * †Hesperolagomys
 * †Hesperolagomys galbreathi – or unidentified comparable form
 * †Hesperosorex – tentative report
 * Heteropora
 * †Hexacarpellites
 * †Hexacarpellites hallii
 * Hiatella
 * Himantopus
 * †Himantopus mexicanus
 * †Hippotherium
 * Hoplophoneus1.jpg †[[Hoplophoneus]]
 * †Hoplophoneus cerebralis
 * †Hoplophoneus strigidens
 * †Hovenia
 * †Hovenia oregonensis
 * Hydrangea
 * †Hydrangea knowltonii
 * †Hydrochelidon
 * †Hydrochelidon nigra
 * †Hypertragulus
 * †Hypertragulus calcaratus
 * †Hypertragulus hesperius
 * †Hypertragulus planiceps
 * Hypohippus.jpg †[[Hypohippus]]
 * †Hypohippus osborni
 * †Hypolagus
 * †Hypolagus fontinalis
 * †Hypolagus oregonensis – type locality for species
 * †Hypolagus vetus
 * †Hypomorphnus
 * †Hypomorphnus sodalis – tentative report
 * †Hypsidoris
 * †Hypsidoris oregonensis – type locality for species
 * †Hypsiops
 * †Hypsiops breviceps
 * †Hyrachyus
 * †Hyrachyus eximius
 * †Hystricops
 * †Hystricops browni

I

 * Indarctos atticus.jpg †[[Indarctos]]
 * †Indarctos oregonensis – type locality for species
 * †Ingentisorex
 * †Ingentisorex tumididens
 * †Iodes
 * †Iodes chandlerae
 * †Iodes multirecticulata
 * †Iodicarpa
 * †Iodicarpa ampla
 * †Iodicarpa lenticularis
 * Isocrinus
 * Isurus
 * †Isurus planus

J

 * †Jimomys
 * †Jimomys lulli
 * †Joejonesia
 * †Joejonesia globosa
 * †Juglandiphyllites
 * †Juglandiphyllites cryptatus
 * Juglans major Morton.jpg [[Juglans]]
 * †Juglans clarnensis
 * †Juglans wheelerensis

K

 * Kimberly Mural - Roger Witter Kalobatippus cropped.png †[[Kalobatippus]]
 * †Kardiasperma
 * †Kardiasperma parvum
 * Katherinella
 * †Katherinella angustifrons
 * †Keasius
 * †Keasius taylori – type locality for species
 * Kellia
 * †Kellia saxiriva – type locality for species
 * †Kellia vokesi – type locality for species
 * †Keteleeria
 * †Keteleeria rujadana
 * †Kewia
 * †Kewia marquamensis – type locality for species
 * †Kolponomos
 * †Kolponomos newportensis – type locality for species

L

 * Lacuna
 * Lacuna vincta (Sowerby).jpg †[[Lacuna vincta]]
 * Lamelliconcha
 * †Lamelliconcha clarki
 * †Langtonia
 * †Langtonia bisulcata
 * †Lantanotherium
 * Larus
 * †Larus argentatus
 * California Gull (Larus californicus) RWD2.jpg †[[Larus californicus]]
 * †Larus oregonus – type locality for species
 * †Larus philadelphia
 * †Larus pristinus – type locality for species
 * †Larus robustus – type locality for species
 * †Laurocalyx
 * †Laurocalyx wheelerae
 * †Laurocarpum
 * †Laurocarpum hancockii
 * †Laurocarpum nutbedensis
 * †Laurocarpum raisinoides
 * †Leguminocarpon
 * †Leidymys
 * Lepeta
 * †Lepeta concentrica
 * †Leptarctus
 * †Leptarctus oregonensis
 * Leptocyon gregorii holotype AMNH 12879.jpg †[[Leptocyon]]
 * †Leptocyon douglassi
 * †Leptocyon mollis
 * †Leptocyon vulpinus
 * †Leptodontomys
 * †Leptodontomys oregonensis – type locality for species
 * †Leptodontomys quartzi
 * Lepus
 * †Lepus ennisianus
 * Leukoma
 * †Leukoma staminea
 * †Lignicarpus
 * †Lignicarpus crassimuri
 * †Ligniglobus
 * †Ligniglobus sinuosifibrae
 * †Limicolavis
 * †Limicolavis pluvianella – type locality for species
 * Limnodromus
 * Limnodromus griseus.jpg †[[Limnodromus griseus]] – tentative report
 * †Limnoecus
 * †Limnoecus tricuspis – or unidentified comparable form
 * Lindera
 * †Lindera clarnensis
 * †Lindera oregona
 * †Liodontia
 * †Liodontia alexandrae
 * †Liodontia furlongi
 * CopalmeDAmerique.jpg [[Liquidambar]]
 * †Liracassis
 * †Liracassis petrosa
 * †Litheuphaea – type locality for genus
 * †Litheuphaea carpenteri – type locality for species
 * †Lithocarpus
 * †Lithocarpus klamathensis
 * †Litorhadia
 * †Litorhadia astoriana
 * †Litorhadia washingtonensis
 * †Litorhadia washingtoni
 * †Litseaphyllum
 * †Litseaphyllum presanguinea
 * Littorina
 * †Littorina remondi
 * †Lobipes
 * †Lobipes lobatus
 * Lophodytes
 * Hooded Merganser (Lophodytes cucullatus) (1).JPG †[[Lophodytes cucullatus]]
 * †Lophopanopeus
 * †Lophopanopeus baldwini – type locality for species
 * †Lophortyx
 * †Lophortyx shotwelli – type locality for species
 * Lucinoma
 * †Lucinoma acutilineata
 * †Lucinoma columbiana
 * †Lunaticarpa
 * †Lunaticarpa curvistriata
 * †Lutravus
 * †Lutravus halli – or unidentified comparable form
 * Lynx
 * †Lynx longignathus
 * Lytechinus variegatus.jpg [[Lytechinus]]
 * †Lytechinus baldwini – type locality for species

M

 * †Macginicarpa
 * †Macginicarpa glabra
 * [[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
 * †Machilus asiminoides
 * Macoma
 * †Macoma albaria
 * †Macoma arcatata
 * †Macoma astori
 * †Macoma calcarea
 * †Macoma golikovi
 * †Macoma inquinata
 * FMIB 34796 Shell of Macoma nasuta.jpeg †[[Macoma nasuta]]
 * †Macoma vancouverensis
 * Macrocallista
 * †Macrocallista pittsburgensis
 * †Macrognathomys
 * †Macrognathomys nanus
 * Mactromeris
 * †Mactromeris albaria
 * †Mactromeris pittsburgensis
 * †Mactromeris polynyma
 * †Mactromeris ramonensis
 * †Mactromeris veneriformis
 * Sweetbay Magnolia Magnolia virginiana Flower Closeup 2146px.jpg [[Magnolia]]
 * †Magnolia muldoonae
 * †Magnolia paroblonga
 * †Magnolia tiffneyi
 * Mahonia
 * †Mahonia simplex
 * †Malus – or unidentified comparable form
 * †Mammut
 * †Mammut furlongi – type locality for species
 * †Mammuthus
 * Columbian mammoth cropped.png †[[Mammuthus columbi]] – tentative report
 * Marcia
 * †Marcia bunkeri
 * †Marcia oregonensis
 * Margarites
 * †Margarites pupilla
 * †Marshochoerus
 * †Marshochoerus socialis
 * Martes
 * †Martes gazini – type locality for species
 * Martesia
 * †Martesia turnerae
 * Mastixia
 * †Mastixicarpum
 * †Mastixicarpum occidentale
 * †Mastixioidiocarpum
 * †Mastixioidiocarpum oregonense
 * Megachasma
 * †Megachasma applegatei
 * Megalonyx wheatleyi - AMNH - DSC06327.JPG †[[Megalonyx]]
 * †Megapaloelodus
 * †Megapaloelodus opsigonus – type locality for species
 * †Megatylopus
 * Megayoldia
 * †Megayoldia chehalisensis
 * Melanitta
 * †Melanitta deglandi
 * †Melanitta perspicillata
 * †Meliosma
 * †Meliosma beusekomii
 * †Meliosma bonesii
 * †Meliosma elongicarpa
 * †Meliosma jenkinsii
 * †Meliosma leptocarpa
 * †Meniscomys
 * †Meniscomys uhtoffi
 * †Menispermum – or unidentified comparable form
 * Mergus
 * †Mergus merganser
 * †Mergus serrator
 * Merychippus insignis life restoration.jpg †[[Merychippus]]
 * †Merychippus brevidontus
 * †Merychippus relictus
 * †Merychyus
 * †Merychyus arenarum
 * †Merychyus minimus
 * †Merycochoerus
 * †Merycochoerus magnus
 * †Merycochoerus matthewi
 * †Merycochoerus minor
 * †Merycoides
 * †Merycoides longiceps
 * †Merycoidodon
 * †Merycoidodon bullatus
 * Mesocyon.jpeg †[[Mesocyon]]
 * †Mesocyon brachyops
 * †Mesocyon coryphaeus
 * †Mesohippus
 * †Mesohippus bairdi – or unidentified comparable form
 * †Metalopex
 * †Metalopex merriami
 * Metasequoia
 * †Metasequoia occidentalis
 * †Microphallus
 * †Microphallus perplexus
 * Micropodium
 * †Micropodium ovatum
 * †Micropternodus
 * †Micropternodus morgani
 * Microtus
 * †Microtus montanus
 * Miohippus cropped.jpg †[[Miohippus]]
 * †Miohippus intermedius
 * †Miopleionia
 * †Miopleionia oregonensis
 * †Mioplejonia
 * †Mioplejonia oregonensis
 * †Miotapirus
 * †Mistia – type locality for genus
 * †Mistia spinosa – type locality for species
 * Modiolatus
 * †Modiolatus rectus
 * Modiolus
 * †Modiolus eugenensis
 * †Modiolus modiolus
 * †Molopophorus
 * †Molopophorus anglonana
 * †Molopophorus dalli
 * †Molopophorus fishii
 * †Molopophorus gabbi
 * †Molopophorus matthewi
 * Molothrus
 * †Molothrus ater – tentative report
 * †Monosaulax
 * †Monosaulax progressus – type locality for species
 * †Monosaulax typicus – type locality for species
 * †Moropus
 * †Moropus oregonensis
 * Mulinia
 * †Mulinia eugenensis
 * Mustela
 * †Mya
 * †Mya grewingki
 * †Mya truncata
 * †Mylagaulodon
 * †Mylagaulodon angulatus
 * Myotis – or unidentified comparable form
 * †Mystipterus
 * †Mystipterus pacificus
 * †Mystocheilus – type locality for genus
 * †Mystocheilus fresti – type locality for species
 * Mytilus
 * †Mytilus californianus
 * †Mytilus edulis
 * †Mytilus middendorffi
 * †Mytilus snohomishensis

N

 * †Nanotragulus – or unidentified comparable form
 * Nassarius tiarula.jpg [[Nassarius]]
 * †Nassarius arnoldi
 * †Nassarius fossata
 * †Nassarius lincolnensis
 * †Nassarius perpinguis
 * Natica
 * †Natica thomsonae
 * †Natica weaveri
 * †Nautilus
 * †Nautilus angustatus – type locality for species
 * Nectandra
 * †Nectandra presannguinea
 * †Nehalemia – type locality for genus
 * †Nehalemia delicata – type locality for species
 * Nemocardium
 * †Nemocardium formosum
 * †Nemocardium griphus – or unidentified comparable form
 * †Nemocardium linteum
 * †Neohipparion
 * †Neohipparion leptode – or unidentified comparable form
 * Neophrontops americanus fossil cropped.jpg [[Neophrontops]]
 * †Neophrontops dakotensis
 * Neotamias
 * †Neotamias malloryi
 * †Nephrosemen
 * †Nephrosemen reticulatus
 * Nettion
 * †Nettion bunkeri
 * †Neurotrichus – tentative report
 * †Neurotrichus columbianus
 * Neverita
 * †Neverita globosa
 * †Neverita jamesae
 * †Neverita thomsonae
 * †Neverita washingtonensis
 * †Nexuotapirus
 * †Nexuotapirus robustus
 * Nucella
 * †Nucella decemcostata
 * †Nucella lamellosa
 * †Nucella saxicola
 * Nuculidae - Nucula piacentina.jpg [[Nucula]]
 * †Nucula vokesi
 * Nuculana
 * †Nuculana gabbi
 * †Nuculana nuculana
 * Numenius
 * †Numenius americanus – tentative report
 * †Nuphar
 * Nutricola
 * †Nutricola lordi
 * †Nutricola tantilla
 * Nyroca
 * †Nyroca affinis
 * †Nyroca americana
 * †Nyroca collaris – tentative report
 * †Nyssa
 * †Nyssa scottii
 * †Nyssa spatulata

O

 * †Ocajila
 * American pika (ochotona princeps) with a mouthful of flowers.jpg [[Ochotona]]
 * †Ochotona spanglei – type locality for species
 * Ocotea
 * †Ocotea ovoidea
 * †Ocyplonessa
 * †Ocyplonessa shotwelli – type locality for species
 * †Odontocaryoidea
 * †Odontocaryoidea nodulosa
 * †Ogmophis – type locality for genus
 * †Ogmophis oregonensis – type locality for species
 * Olar
 * †Olar buccinator
 * †Olequahia
 * †Olequahia schencki
 * †Oligobunis
 * Olivella
 * Olivella biplicata 3.jpg †[[Olivella biplicata]]
 * †Olivella mathewsonii
 * †Olivella pedroana
 * †Omsicarpium
 * †Omsicarpium striatum
 * Ondatra
 * †Ondatra annectens – type locality for species
 * Opalia
 * †Opalia hertleini
 * †Opalia williamsoni – or unidentified comparable form
 * †Oregonomys
 * †Oregonomys pebblespringsensis – type locality for species
 * †Oregonomys sargenti
 * †Oreodontoides
 * †Oreodontoides oregonensis
 * †Oreolagus
 * †Oreolagus wallacei – type locality for species
 * †Oryctoantiquus – type locality for genus
 * †Oryctoantiquus borealis – type locality for species
 * †Osbornodon
 * †Osbornodon sesnoni
 * OsmundaRegalis.jpg †[[Osmunda]]
 * †Osmunda occidentale
 * Ostrea
 * †Ostrea lurida – or unidentified comparable form
 * Ostrya
 * †Ostrya oregoniana

P

 * †Pachycrommium
 * †Pachycrommium clarki
 * †Paciculus
 * †Pacificotaria – type locality for genus
 * †Pacificotaria hadromma – type locality for species
 * †Palaeoallophylus
 * †Palaeoallophylus globosa
 * †Palaeoallophylus gordonii
 * †Palaeocarya
 * †Palaeocarya clarnensis
 * †Palaeocarya olsonii – or unidentified comparable form
 * Palaeocastor BW cropped.png †[[Palaeocastor]]
 * †Palaeocastor peninsulatus
 * †Palaeolagus
 * †Palaeolagus haydeni
 * †Palaeophytocrene
 * †Palaeophytocrene hancockii
 * †Palaeophytocrene pseudopersica
 * †Palaeosinomenium
 * †Palaeosinomenium venablesii
 * †Paleopanax
 * †Paleopanax oregonensis
 * †Paleoplatycarya – tentative report
 * †Paleoplatycarya hickeyi
 * †Paleotetrix
 * †Paleotetrix gilli
 * Paliurus spina-christi 4.jpg [[Paliurus]]
 * †Paliurus blakei
 * Pandora
 * †Pandora eocapsella
 * †Pandora grandis
 * †Pandora laevis
 * Panomya
 * †Panomya ampla
 * Panopea
 * †Panopea abrupta
 * †Panopea ramonensis
 * †Panopea snohomishensis
 * Panthera
 * Jaguar (Panthera onca palustris) male Three Brothers River (cropped) cropped.jpg †[[Panthera onca]] – or unidentified comparable form
 * †Parablastomeryx
 * †Paracarpinus
 * †Paracarpinus chaneyi
 * †Paracosoryx
 * †Paracosoryx nevadensis – or unidentified comparable form
 * †Paracryptotis
 * †Paracryptotis rex
 * †Paradaphoenus
 * †Paradaphoenus cuspigerus
 * †Paradomnina
 * †Paradomnina relictus – type locality for species
 * †Paraenhydrocyon
 * †Paraenhydrocyon josephi
 * †Paraenhydrocyon wallovianus
 * †Parahippus
 * †Parahippus leonensis – or unidentified related form
 * †Parahippus pawniensis
 * San Diego Paramylodon.jpg Paramylodon]] †Paramylodon
 * †Paramylodon harlani
 * †Parapaenemarmota
 * †Parapaenemarmota oregonensis
 * Parapholas
 * †Parapholas californica
 * †Parapliosaccomys
 * †Parapliosaccomys oregonensis
 * †Parasyrinx
 * †Parasyrinx delicata
 * †Paratomarctus
 * †Paratomarctus temerarius
 * Kimberly Mural - Roger Witter cropped.png †[[Paratylopus]]
 * †Paronychomys
 * †Paronychomys shotwelli – type locality for species
 * †Paroreodon
 * †Paroreodon parvus
 * †Paroreodon stocki
 * †Parrotia
 * †Parrotia brevipetiolata
 * †Parthenocissus
 * †Parthenocissus angustisulcata
 * †Parthenocissus clarnensis
 * Parvamussium
 * †Parvamussium astoriana
 * Parvicardium
 * †Parvicardium eugenense
 * Passalus
 * †Passalus indormitus – type locality for species
 * †Pasternackia
 * †Pasternackia pusilla
 * Patinopecten
 * †Patinopecten caurinus
 * †Patinopecten coosensis
 * †Patinopecten oregonensis
 * †Patinopecten popatulus
 * †Patinopecten propatulus
 * †Patriofelis
 * †Patriofelis ferox
 * †Pediocetes
 * †Pediocetes lucasii – type locality for species
 * †Pediocetes nanus – type locality for species
 * †Pediocetes phasianellus
 * Pekania
 * †Pekania occulta – type locality for species
 * Pelagornis chilensis EF.jpg †[[Pelagornis]]
 * Pelecanus
 * †Pelecanus erythrorhynchos
 * †Pelecanus erythrorhynchus – tentative report
 * Penitella
 * †Penitella penita
 * †Pentoperculum
 * †Pentoperculum minimus
 * †Perchoerus
 * †Perchoerus probus
 * †Peridiomys
 * †Peridiomys oregonensis
 * Periploma
 * Perognathus
 * †Perognathus stevei – type locality for species
 * DiGangi-Deermouse.jpg [[Peromyscus]]
 * †Peromyscus antiquus
 * †Peromyscus dentalis
 * †Perse
 * †Perse lincolnensis
 * †Perse pittsburgensis
 * †Petauristodon
 * Phalacrocorax
 * †Phalacrocorax auritus – tentative report
 * †Phalacrocorax leptopus – type locality for species
 * †Phalacrocorax macropus
 * †Phalacrocorax marinavis – type locality for species
 * Phalaropus
 * †Phalaropus lobatus
 * Phalium
 * †Phalium aequisulcatum
 * †Phalium turricula
 * Phanerolepida
 * †Phanerolepida oregonensis
 * †Philotrox
 * †Philotrox condoni
 * †Phlaocyon
 * †Phlaocyon latidens
 * Phoca
 * †Phoca vitulina – or unidentified comparable form
 * †Phocavis – type locality for genus
 * †Phocavis maritimus – type locality for species
 * Flamingos Laguna Colorada.jpg [[Phoenicopterus]]
 * †Phoenicopterus copei – type locality for species
 * †Pileosperma
 * †Pileosperma minutum
 * †Pileosperma ovatum
 * †Pinckneya
 * †Pinckneya dilcheri
 * †Pinis
 * †Pinis johndayensis
 * †Pinnarctidion
 * †Pinnarctidion rayi – type locality for species
 * Pinus densiflora Kumgangsan.jpg [[Pinus]]
 * †Pinus johndayensis
 * †Pinus knowltoni
 * †Pistachioides
 * †Pistachioides striata
 * Pitar
 * †Pitar clarki
 * †Pitar dalli
 * †Plafkeria
 * †Plafkeria obliquifolia
 * †Plagiolophus
 * †Plagiolophus weaveri
 * Platanus
 * †Platanus condoni
 * †Platanus condonii
 * †Platanus dissecta
 * †Platanus exaspera
 * †Platanus hirticarpa
 * Platygonus leptorhinus cropped.png of the genus Platygonus. Charles R. Knight (1922).]] †Platygonus
 * †Platygonus brachirostris
 * †Platygonus oregonensis
 * †Platygonus vetus – or unidentified comparable form
 * †Pleiolama
 * †Pleiolama vera – or unidentified comparable form
 * †Plesiocolopirus
 * †Plesiocolopirus hancocki
 * †Plesiogulo
 * †Plesiogulo marshalli
 * †Plesiosorex
 * †Plesiosorex donroosai – or unidentified comparable form
 * †Pleurolicus
 * †Pleurolicus sulcifrons
 * †Pleurolira
 * †Pleurolira oregonensis
 * †Pleuroliria
 * †Pleuroliria bicarinata
 * †Plioceros
 * †Pliocyon – or unidentified comparable form
 * †Pliocyon medius
 * Pliohippus Pernix.jpg †[[Pliohippus]]
 * †Pliohippus spectans
 * †Plionarctos
 * †Plionictis
 * †Plionictis ogygia
 * †Plionictis oregonensis
 * †Pliosaccomys
 * †Pliotaxidea
 * †Pliotaxidea nevadensis
 * †Pliozapus
 * †Pliozapus solus
 * Podiceps
 * †Podiceps auritus – tentative report
 * Podilymbus
 * †Podilymbus podiceps
 * Pododesmus
 * †Pododesmus macrochisma
 * Pbjohnday-m cropped.png †[[Pogonodon]]
 * †Pogonodon brachyops
 * †Pogonodon platycopis – type locality for species
 * Polinices
 * †Polinices canalis
 * †Polinices draconis
 * †Polinices galianoi
 * †Polinices washingtonensis
 * †Polinices washingtoni
 * †Polinicies
 * †Polinicies clementensis
 * †Polinicies nuciformis
 * †Pollostosperma
 * †Pollostosperma dictyum
 * †Polygrana
 * †Polygrana nutbedense
 * Polypodium vulgare (aka).jpg †[[Polypodium]] – or unidentified comparable form
 * †Pontolis – type locality for genus
 * †Pontolis magnus – type locality for species
 * †Potamogeton
 * †Potamogeton parva
 * †Potanospira
 * †Potanospira fryi
 * †Praehyalocylis
 * †Praehyalocylis cretacea
 * †Priscofusus
 * †Priscofusus coli – or unidentified comparable form
 * †Priscofusus geniculus
 * †Priscofusus medialis
 * †Priscofusus medialus
 * †Priscofusus stewarti
 * †Pristichampsus
 * †Procadurcodon – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Procamelus
 * †Procamelus grandis – or unidentified comparable form
 * †Procerapex
 * †Procerapex bentsonae
 * Proischyromys – type locality for genus
 * †Proischyromys perditus – type locality for species
 * †Promartes – or unidentified comparable form
 * †Promerycochoerus
 * †Promerycochoerus macrostegus
 * †Promerycochoerus superbus
 * †Proneotherium – type locality for genus
 * †Proneotherium repenningi – type locality for species
 * †Pronotolagus
 * Propeamussium
 * †Propeamussium clallamensis – or unidentified comparable form
 * †Prosomys
 * †Prosomys mimus – type locality for species
 * †Prosthennops
 * †Prosthennops serus – tentative report
 * †Proterozetes – type locality for genus
 * †Proterozetes ulysses – type locality for species
 * Protitanops NT small.jpg †[[Protitanops]]
 * †Protitanops curryi
 * †Protolabis – or unidentified comparable form
 * †Protorepomys – type locality for genus
 * †Protospermophilus
 * †Protospermophilus malheurensis
 * Protothaca
 * †Protothaca staleyi
 * †Pruniticarpa
 * †Pruniticarpa cevallosii
 * Prunus
 * †Prunus olsonii
 * †Prunus weinsteinii
 * Psammacoma
 * †Psammacoma arctata
 * †Psephophorus – tentative report
 * †Psephophorus oregonensis – type locality for species
 * Pseudaelurus cropped.png †[[Pseudaelurus]]
 * †Pseudoblastomeryx
 * †Pseudoblastomeryx advena
 * †Pseudotheridomys
 * †Pseudotheridomys pagei
 * †Pseudotomus
 * †Pseudotrimylus
 * †Pseudotrimylus mawbyi
 * †Pseudotsuga
 * †Pseudotsuga laticarpa
 * Pteris
 * †Pteris silvicola
 * Pterocarya
 * †Pterocarya mixta
 * †Pterocarya occidentalis
 * †Pteronarctos – type locality for genus
 * †Pteronarctos goedertae – type locality for species
 * †Pteronarctos piersoni – type locality for species
 * †Pteronepelys
 * †Pteronepelys wehrii
 * †Pulvinisperma
 * †Pulvinisperma minutum
 * Puncturella
 * †Puncturella galeata
 * Pupillaria – tentative report
 * Purpura
 * †Purpura foliata
 * †Purpura lurida
 * Pyramidella – tentative report
 * Pyrenacantha
 * †Pyrenacantha occidentalis
 * †Pyrisemen
 * †Pyrisemen attenuatum
 * Pears.jpg †[[Pyrus]]
 * †Pyrus oregonensis

Q

 * Eiche bei Schönderling, 2.jpg [[Quercus]]
 * †Quercus berryi
 * †Quercus consimilis
 * †Quercus paleocarpa
 * Querquedula
 * †Querquedula pullulans – type locality for species
 * †Quintacava
 * †Quintacava velosida

R

 * Raja
 * Rallus
 * †Rallus limicola
 * Raninoides
 * †Raninoides washburnei
 * Recurvirostra
 * American Avocet1.jpg †[[Recurvirostra americana]]
 * Retusa
 * †Retusa petrosa
 * †Retusa tantilla
 * †Retusa turneri
 * Rhabdus
 * †Rhabdus schencki
 * †Rhizocyon
 * †Rhizocyon oregonensis
 * Rhus
 * †Rhus lesquereuxii
 * †Rhus rooseae
 * †Rhus varians
 * †Ribes
 * Rimella
 * Rosa
 * †Rosa hilliae
 * Blackberries on bush.jpg [[Rubus]]
 * †Rubus ameyeri
 * †Rubus fremdii
 * †Rudiocyon – type locality for genus
 * †Rudiocyon amplidens – type locality for species
 * †Rudiomys
 * †Rudiomys mcgrewi

S

 * SabalPalm.jpg [[Sabal]]
 * †Sabal bracknellense
 * †Sabal jenkinsii
 * †Sabia
 * †Sabia prefoetida
 * Saccella
 * †Saccella amelga
 * †Saccella calkinsi
 * Salenia
 * †Salenia cascadensis – type locality for species
 * †Salix schimperi
 * †Sambucuspermites
 * †Sambucuspermites rugulosus
 * Sanguinolaria
 * †Sanguinolaria townsendensis
 * †Saportaspermum
 * †Saportaspermum occidentalis
 * Sargentodoxa
 * †* Sargentodoxa globosa – type locality for species
 * Sassia
 * †Sassia bilineata
 * Saxicavella
 * †Saxicavella burnsi
 * Saxidomus
 * Butter clam close up.jpg †[[Saxidomus gigantea]]
 * †Saxidomus giganteus
 * †Saxifragispermum
 * †Saxifragispermum tetragonalis
 * †Scabraecarpium
 * †Scabraecarpium clarnense
 * †Scalaritheca
 * †Scalaritheca biseriata
 * Scalina
 * †Scalina becki
 * †Scalina dickersoni – or unidentified related form
 * †Scalopoides
 * †Scalopoides ripafodiator
 * †Scapanoscapter
 * †Scapanoscapter simplicidens
 * Scapanus
 * †Scapanus latimanus
 * †Scapanus proceridens
 * †Scapanus shultzi – or unidentified comparable form
 * Scaphander lignarius 001.jpg [[Scaphander]]
 * †Scaphander impuncatatus
 * †Scaphander impunctatus – type locality for species
 * †Scaphander stewarti
 * †Scaphicarpium
 * †Scaphicarpium radiatum
 * †Schisandra
 * †Schisandra oregonensis
 * Schizaster
 * †Schizaster diabloensis
 * †Schizodontomys
 * †Schizodontomys greeni
 * Eastern Gray Squirrel 800.jpg [[Sciurus]]
 * †Sciurus ballovianus
 * †Sciurus wortmani
 * †Scolecophagus
 * †Scolecophagus affinis – type locality for species
 * †Scutella
 * †Scutella gabbi
 * Searlesia – tentative report
 * †Searlesia carlsoni
 * Semele
 * †Semele willamettensis
 * Sequoia
 * †Sequoia affinis
 * †Seuku
 * †Seuku emlongi – type locality for species
 * †Sewellelodon
 * †Sewellelodon predontia – or unidentified comparable form
 * Sideroxylon
 * †sideroxylon? subangularis – type locality for species
 * Siliqua
 * †Siliqua patula
 * †Simocetus – type locality for genus
 * †Simocetus rayi – type locality for species
 * Simocyon portrait.png †[[Simocyon]]
 * †Simocyon primigenius
 * Simomactra
 * †Simomactra falcata
 * Sinum
 * †Sinum obliquum
 * †Sinum scopulosum
 * Solariella
 * †Solariella cicca – type locality for species
 * †Solariella cidaris
 * Solemya
 * †Solemya ventricosa
 * Solen
 * †Solen sicarius
 * †Solen townsendensis
 * Solena
 * †Solena conradi
 * †Solena eugenensis
 * †Solena novacularis
 * Somatochlora arctica.JPG †[[Somatochlora]]
 * †Somatochlora oregonica – type locality for species
 * Spermophilus
 * †Spermophilus gidleyi
 * †Spermophilus mckayensis
 * †Spermophilus shotwelli
 * †Spermophilus tephrus
 * †Spermophilus wilsoni
 * †Sphaerosperma
 * †Sphaerosperma riesii
 * †Sphenophalos
 * †Sphenosperma
 * †Sphenosperma baccatum
 * †Spirocrypta
 * †Spirocrypta pileum
 * Spirotropis
 * †Spirotropis calodius
 * †Spirotropis kincaidi
 * †Spirotropis washingtonensis
 * Spisula
 * †Spisula densata
 * †Spisula eugenensis
 * Spizaetus
 * †Spizaetus pliogryps
 * Steneofiber esseri.JPG †[[Steneofiber]]
 * †Steneofiber gradatus
 * Stephanodiscus
 * †Stephanodiscus excentricus
 * †Stephanodiscus niagarae
 * †Stephanodiscus rhombus – type locality for species
 * Stercorarius
 * †Stercorarius schufeldti – type locality for species
 * Sterna
 * †Sterna elegans – tentative report
 * †Sterna forsteri
 * †Sterna fosteri – tentative report
 * Sthenictis1.JPG [[Sthenictis]]
 * †Sthenictis junturensis – type locality for species
 * †Stichopsammia – tentative report
 * †Stichopsammia vokesi
 * †Stockeycarpa
 * †Stockeycarpa globosa
 * †Stomechinus
 * †Stomechinus dissimilaris – type locality for species
 * †Striatisperma
 * †Striatisperma coronapunctatum
 * Strongylocentrotus
 * Sturnella
 * †Suavodrillia
 * †Suavodrillia winlockensis
 * Knight Caenopus.jpg †[[Subhyracodon]]
 * Surculites
 * †Surculites condonana
 * †Surculites wynoocheensis
 * Sveltella
 * †Sveltella exiliplex
 * †Sveltella keaseyensis – type locality for species
 * Symplocos
 * †Symplocos nooteboomii

T

 * †Tanyoplatanus
 * †Tanyoplatanus cranei
 * South American tapir (Tapirus terrestris).JPG [[Tapirus]]
 * †Tapirus californicus – or unidentified comparable form
 * Tapiscia
 * †Tapiscia occidentalis
 * Taranis
 * †Taranis columbiana
 * †Tardontia
 * †Tardontia occidentale – or unidentified comparable form
 * Taxidea
 * †Taxus
 * †Taxus masonii
 * Tegula
 * †Tegula stantoni
 * †Tejonia
 * †Tejonia moragai
 * Teleoceras Horsfall cropped.jpg †[[Teleoceras]]
 * †Teleoceras fossiger
 * †Teleoceras hicksi
 * †Teleoceras medicornutum
 * †Teletaceras
 * †Teletaceras radinskyi – type locality for species
 * Tellina fabula.jpg [[Tellina]]
 * †Tellina aduncanasa
 * †Tellina aragonia
 * †Tellina emacerata
 * †Tellina eugenia
 * †Tellina idae – or unidentified related form
 * †Tellina lincolnensis
 * †Tellina pittsburgensis
 * †Tellina quasimacoma
 * †Temnocyon
 * †Temnocyon altigenis
 * †Temnocyon fingeruti – type locality for species
 * †Tenudomys – or unidentified comparable form
 * †Tenuisperma
 * †Tenuisperma ellipticum
 * †Tephrocyon
 * †Tephrocyon rurestris
 * Terebratalia
 * †Terebratalia occidentalis
 * Terebratulina
 * †Terebratulina unguicula
 * Terminalia
 * †Terminalia oregona
 * Tetraclinis articulata.JPG †[[Tetraclinis]]
 * †Tetraclinis potlachensis
 * Thais
 * †Thais lamellosa
 * †Thais lima – or unidentified related form
 * †Thanikaimonia
 * †Thanikaimonia geniculata
 * Thesbia – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Thesbia antiselli: synonym of † Xenoturris antiselli (F. Anderson & B. Martin, 1914)
 * †Thinohyus
 * †Thinohyus lentus
 * Thomomys
 * †Thomomys townsendii
 * Thracia
 * †Thracia condoni
 * †Thracia keaseyensis – type locality for species
 * †Thracia trapezoides
 * Hypsiops breviceps Exhibit Museum of Natural History cropped.jpg †[[Ticholeptus]]
 * †Ticholeptus zygomaticus
 * †Ticholepus
 * †Ticholepus zygomaticus
 * †Tiffneycarpa
 * †Tiffneycarpa scleroidea
 * Tilia
 * †Tilia aspera
 * †Tilia circularis
 * †Tilia fossilensis
 * †Tilia lamottei
 * †Tilia pedunculata
 * †Tilia penduculata
 * †Tinomiscoidea
 * †Tinomiscoidea occidentalis
 * Tinospora
 * †Tinospora elongata
 * †Tinospora hardmanae
 * Torreya nucifera bgiu.jpg †[[Torreya]]
 * †Torreya clarnensis
 * †Torreya masonii
 * Totanus
 * †Totanus melanoleucas
 * †Toxicodendron
 * †Toxicodendron wolfei
 * Trema
 * †Trema nucilecta
 * Tresus
 * †Tresus pajaroanus
 * Trichotropis turrita 002.jpg [[Trichotropis]]
 * †Trichotropis cancellata
 * †Trichotropis insignis
 * †Trigonostela
 * †Trigonostela oregonensis
 * †Tripartisemen
 * †Tripartisemen bonesii
 * †Triplascapha
 * †Triplascapha collinsonae
 * †Triplexivalva
 * †Triplexivalva rugata
 * †Triplochitioxylon – type locality for genus
 * †Triplochitioxylon oregonensis – type locality for species
 * †Trisepticarpium
 * †Trisepticarpium minutum
 * †Tritonifusus
 * †Tritonifusus rectirostis
 * Trochita
 * Trophon geversianus acordonada 002.jpg [[Trophon]]
 * †Trophon halibrectus
 * †Trophon kernensis
 * †Trophon platacantha – type locality for species
 * †Truncatisemen
 * †Truncatisemen sapotoides
 * †Tsaphanomys – type locality for genus
 * †Tsaphanomys shotwelli
 * †Tsuga
 * †Tsuga sonomensis
 * Turricula
 * †Turricula emerita
 * †Turricula keaseyensis
 * †Turrinosyrinx
 * †Turrinosyrinx nodifera
 * †Turrinosyrinx nodilifera
 * †Turrinosyrinx packardi – or unidentified comparable form
 * Turris
 * †Turris coli
 * †Turris impecunia
 * †Turris perversa
 * †Turris smithi
 * Turritellatricarinata.jpg [[Turritella]]
 * †Turritella buwaldana
 * †Turritella keaseyense
 * †Turritella keaseyensis – type locality for species
 * †Turritella oregonensis
 * †Turritella pittsburgensis
 * †Turritella uvasana
 * †Tylocephalonyx
 * Tympanuchus
 * †Tympanuchus pallidicinctus
 * †Typhoides
 * †Typhoides buzekii

U

 * East Coker elm, 2.jpg [[Ulmus]]
 * †Ulmus chaneyi
 * †Ulmus speciosa
 * †Ulospermum
 * †Ulospermum hardingae
 * †Unknown
 * †Unknown dicotyledonous
 * †Unknown monocotyledonous
 * †Ursavus
 * †Ursavus primaevus – or unidentified comparable form

V

 * Venericardia
 * †Venericardia aragonia – or unidentified comparable form
 * †Venericardia hornii
 * †Venericardia merriami – or unidentified comparable form
 * †Venericardia planicosta
 * †Vertipecten
 * †Vertipecten fucanus – or unidentified comparable form
 * Viburnum opulus C.jpg †[[Viburnum]]
 * †Viburnum tubmanum
 * Vitis californica with grapes.jpg [[Vitis]]
 * †Vitis magnisperma
 * †Vitis tiffneyi
 * Vulpes
 * †Vulpes stenognathus

W

 * †Wheelera
 * †Wheelera lingnicrusta

X

 * Xema sabini -Iceland -swimming-8 (1).jpg, or Sabine's gull]] Xema''
 * †Xema sabinii
 * †Xenicohippus
 * †Xenicohippus craspedotum
 * †Xylotitan – type locality for genus
 * †Xylotitan cenosus – type locality for species

Y

 * †Yaquinacetus – type locality for genus
 * †Yaquinacetus meadi – type locality for species
 * Yoldia
 * †Yoldia cooperii – or unidentified comparable form
 * †Yoldia impressa
 * †Yoldia oregona
 * †Yoldia seminuda
 * †Yoldia tenuissima

Z

 * Zalophus
 * Lion de mer Amnéville 01.jpg †[[Zalophus californianus]]
 * †Zanthopsis
 * †Zanthopsis rathbunae – type locality for species
 * Zelkova
 * †Zelkova hesperia
 * †Zelkova oregoniana
 * †Zingiberopsis