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

Chlorophytes

Diatoms

Frustulia rhomboides
Navicula contendens
  • Actinella 
    • Actinella brasiliensis[2]
  • Amphipleura
    • Amphipleura oregonica[2]
  • Aulacoseira
    • †Aulacoseira distans- type locality for species[2]
    • Aulacoseira granulata[2]
  • Caloneis
    • Caloneis westii[2]
  • Cavinula
    • Cavinula scutiformis[2]
  • Coscinodiscus
    • Coscinodiscus subaulacodiscoidalis[2]
  • Cymbella
    • Cymbella americana[2]
    • Cymbella amphicephala[2]
    • Cymbella flexella[2]
    • Cymbella lunula[2]
    • Cymbella partita[2]
    • Cymbella sagittarius[2]
  • Desmogonium 
    • Desmogonium rabenhorstianum[2]
  • Diatoma
    • Diatoma grande[2]
    • Diatoma tenue var. hybrida[2]
    • Diatoma vulgaris[2]
  • Eunotia
    • Eunotia incisa[2]
    • Eunotia parallela[2]
    • Eunotia pectinalis[2]
    • Eunotia robusta[2]
  • Fragilaria
    • Fragilaria constricta[2]
    • Fragilaria binalis[2]
  • Frustulia
    • Frustulia rhomboides[2]
  • Gomphogramma 
    • Gomphogramma rupestre[2]
  • Gomphonema
    • Gomphonema acuminatum[2]
    • Gomphonema gracile[2]
    • Gomphonema parvulum[2]
  • Himantidium 
    • Himantidium faba[2]
    • Himantidium gracile[2]
    • Himantidium minus[2]
  • Melosira
    • Melosira biseriata[2]
    • Melosira lyrata[2]
    • Melosira teres[2]
    • Melosira undulata[2]
  • Navicula
    • Navicula americana[2]
    • Navicula angusta[2]
    • Navicula bacillum[2]
    • Navicula commutata[2]
    • †Navicula contendens - type locality for species[2]
    • Navicula elegans[2]
    • Navicula instabilis[2]
    • †Navicula pauper - type locality for species[2]
    • Navicula placentula[2]
    • †Navicula pontifica - type locality for species[2]
    • †Navicula protrudens - type locality for species[2]
    • †Navicula pseudoaffinis - type locality for species[2]
    • Navicula pseudobacillum[2]
    • Navicula pusilla[2]
    • Navicula radiosa[2]
    • †Navicula reversa - type locality for species[2]
    • Navicula stauroptera[2]
    • Navicula subacuta[2]
    • †Navicula substauroneis - type locality for species[2]
    • Navicula tabellaria[2]
    • Navicula transversa[2]
    • Navicula viridis[2]
  • Neidium
    • Neidium dubium[2]
    • Neidium iridescens[2]
    • Neidium iridis[2]
  • Pinnularia
    • Pinnularia gibba[2]
    • Pinnularia gracillima[2]
    • Pinnularia major[2]
    • Pinnularia mesotyla[2]
    • Pinnularia nodosa[2]
    • Pinnularia rupestris[2]
    • Pinnularia subcapitata[2]
  • Stauroneis
    • †Stauroneis acutissima - type locality for species[2]
    • Stauroneis anceps[2]
    • Stauroneis phoenicenteron[2]
  • Surirella
    • Surirella bifrons[2]
    • Surirella inducta[2]
    • Surirella striatula[2]
  • Tabellaria
    • Tabellaria fenestrata[2]
    • Tabellaria flocculosa[2]
  • Tetracyclus 
    • Tetracyclus ellipticus[2]
    • Tetracyclus lacustris[2]

Foraminifera

Test of Elphidium
  • Amphimorphina 
    • †Amphimorphina californica
  • Amphistegina
  • Bulimina
    • Cf. †Bulimina jacksonensis
  • Cassidulina
    • Cf. †Cassidulina galvinensis
  • Chilostomella 
    • Cf. †Chilostomella oolina
  • Cibicides
    • †Cibicides cushmani
    • †Cibicides midwayensis
  • Cibicidoides 
    • †Cibicidoides coalingensis
  • Dentalina 
    • Cf. †Dentalina consorbrina
    • Cf. †Dentalina dusenburyi
    • Cf. †Dentalina hispidocostata
    • †Dentalina longiscata
  • Eggerella 
    • Cf. †Eggerella bradyi
  • Elphidium
  • Eponides 
    • †Eponides mexicana
    • †Eponides yeguaensis
  • Gaudryina 
    • †Gaudryina jacksonensis
  • Globigerina
    • Undescribed Late Eocene Whiskey Creek methane-seep fossil
  • 'Globobulimina 
    • †Globobulimina pacifica
  • Globocassidulina
    • †Globocassidulina globosa
  • Guttulina
    • †Guttulina frankei
  • Gyroidina
    • †Gyroidina orbicularis
  • Haplophragmoides 
    • Undescribed Late Eocene Whiskey Creek methane-seep fossil
  • †Involutina 
    • Cf. †Involutina incertus
  • Lenticulina 
    • Lenticulina rancocasensis
    • Undescribed Late Eocene Whiskey Creek methane-seep fossil
    • Undescribed Ypresian Crescent Formation fossil
  • Marginulina 
    • †Marginulina subbulata
  • Martinottiella 
    • †Martinottiella communis
  • Plectofrondicularia 
    • Cf. †Plectofrondicularia vaughani
  • †Pseudoglandulina 
    • Cf. †Pseudoglandulina inflata
  • Pyrgo (genus)
    • Cf. †Pyrgo lupheri
  • Quinqueloculina
    • †Quinqueloculina imperalis
    • †Quinqueloculina imperialis
  • Robulus 
    • Cf. †Robulus texanus
    • Cf. †Quinqueloculina minuta
  • Sigmomorphina 
    • †Sigmomorphina schencki
  • 'Uvigerina 
    • †Uvigerina garzaensis

Plants

Bryophytes

Hypnites patens moss holotype
  • †Hypnites 
    • †Hypnites brittoniae - type locality for species[3][4]
    • †Hypnites knowltonii - type locality for species[3][4]
    • †Hypnites patens - type locality for species[3][4]
  • †Polytrichites - type locality for genus
    • †Polytrichites spokanensis - type locality for species[5]

"Ferns" (Polypodiophyta)

A fossilized frond found in Whatcom County from the Eocene tree fern Cyathea inequilateralis

Lycophytes

Ginkgophytes

Ginkgo biloba
Klondike Mountain Formation
Ypresian, Republic

Gnetophytes

Pinophytes

Cupressaceae

Metasequoia occidentalis branchlet

Pinaceae

Abies milleri twig and foliage
Pseudolarix wehrii wing seed

Sciadopityaceae

Taxaceae

Angiosperms

Plants A

Fossilized leaf found near Spokane; the holotype specimen of the Oligocene-Miocene maple tree Acer chaneyi
Fossilized leaf found in Republic from the Eocene Alder species Alnus parvifolia

Plants B

Fossilized leaf found in Republic from the Eocene to birch species Betula leopoldae

Plants C

Fossilized leaf found in Republic from the Eocene katsura species Cercidiphyllum obtritum
Fossilized leaf found in Republic from the Eocene sweetfern species Comptonia columbiana

Plants D

Diospyros oregoniana

Plants E

Eucommia montana fruit

Plants F

Fagopsis undulata
Klondike Mountain Formation
Ypresian, Republic
Fossilized calyx found in Republic from the Eocene mallow species Florissantia quilchenensis

Plants G

  • Galium
  • Gaultheria
    • †Gaultheria pacifica - type locality for species[57]
  • Gleditsioxylon
    • †Gleditsioxylon columbianum - type locality for species[53][26] (syn Gleditsia columbiana[38])
  • Gordonia
    • †Gordonia idahoensis[32]
  • †Goweria  - type locality of genus
    • †Goweria dilleri[8]
    • †Goweria linearis - type locality for species[8]

Plants H

Hydrangea knowltoni

Plants I

Plants J

Plants K

A living Koelreuteria tree

Plants L

Langeria magnifica
Klondike Mountain Formation
Ypresian Republic
Liquidambar changii
Yakima Canyon Flora
Miocene Yakima Canyon

Plants M

Macginitiea gracilis
Klondike Mountain Formation
Republic

Plants N

Plants O

Fossilized leaf found in Ferry County belonging to the Eocene golden-club Orontium wolfei

Plants P

Palaeocarpinus barksdaleae samaras
Photinia pagae leaf
Prunus cathybrownae flower

Plants Q

†Quercus hiholensis acorn in matrix

Plants R

Eocene Republica hickeyi leaf found in Republic Washington
Fossilized compound leaf from an Eocene sumac Rhus hybrid

Plants S

Plants T

Tetracentron hopkinsii,
Klondike Mountain Formation
Republic
Tilia johnsoni,
Klondike Mountain Formation
Republic
Tsukada davidiifolia,
Klondike Mountain Formation
Republic

Plants U

Ulmus chuchuanus, Ypresian Klondike Mountain Formation

Plants V

Plants W

Plants Z

Poriferans

  • Aphrocallistes
    • Cf. †Aphrocallistes polytretos
  • Eurete 
    • †Eurete? goederti
  • Farrea
  • Hexactinella 
    • †Hexactinella conica – type locality for species
    • †Hexactinella tubula – type locality for species
  • Hyperbaena[8]
    • †Hyperbaena dilleri[8]

Annelids

Nematoids

  • †Mermia

Cnidarians

Cnidarians A-C

  • Astrangia
    • †Astrangia clarki – type locality for species
  • Astreopora
    • †Astreopora duwamishensis – type locality for species
    • †Astreopora sanjuanensis – type locality for species
  • Balanophyllia
    • †Balanophyllia blakelyensis
    • †Balanophyllia cowlitzensis – type locality for species
    • †Balanophyllia fulleri – type locality for species
    • †Balanophyllia teglandae – type locality for species
    • †Balanophyllia variabilis
    • †Balanophyllia washingtonensis – type locality for species[91]
  • A living Caryophyllia solitary coral
    Caryophyllia
    • †Caryophyllia blakeleyensis – type locality for species
    • †Caryophyllia woodmanensis – type locality for species
    • †Caryophyllia wynoocheensis – type locality for species
  • Coenocyathus
    • †Coenocyathus hannibali – type locality for species
  • Colpophyllia
    • †Colpophyllia reagani – type locality for species

Cnidarians D-I

Cnidarians L-R

Cnidarians S-Z

  • Sclerhelia ? – tentative report
  • Siderastrea
    • Cf. †Siderastrea vancouverensis
    • †Siderastrea washingtonensis – type locality for species
  • Stephanocyathus
    • †Stephanocyathus holcombensis – type locality for species
  • Stylaster
    • †Stylaster milleri – type locality for species
  • Trochocyathus
    • †Trochocyathus crooki
    • †Trochocyathus nomlandi
    • †Trochocyathus townsendensis – type locality for species
  • Tubastraea
    • †Tubastraea nomlandi – type locality for species
  • Turbinolia
    • †Turbinolia dickersoni
    • †Turbinolia quaylei – type locality for species
    • †Turbinolia weaveri – type locality for species[91]

Echinoderms

Brachiopods

Hemithiris psittacea
living specimen

Molluscs

Molluscs A

  • Acharax 
    • †Acharax dalli (Clark, 1925) (syn = Solemya dalli)[95]
  • Acila
    • †Acila conradi
    • †Acila decisa
    • †Acila gettysburgensis
    • †Acila pugetensis
  • Acrilla 
    • †Acrilla (Ferminoscala) aragoensis[91]
  • †Acutostrea
    • †Acutostrea idriaensis[91]
  • Aforia
    • †Aforia clallamensis
  • Amaea 
    • †Amaea olympicensis
    • †Amaea washingtonensis
  • Amauropsis
    • †Amauropsis blakeleyensis
  • Anadara
    • †Anadara devincta
    • Cf. †Anadara lakei
  • †Anamirta
    • Cf. †Anamirta milleri – or unidentified comparable form
  • Fossilized shell of the whelk sea snail Ancistrolepis
    Ancistrolepis
    • †Ancistrolepis rearensis
  • †'Anechinocardium 
    • †Anechinocardium lorenzanum
    • Cf. †Anechinocardium weaveri
  • †Aperiploma
    • †Aperiploma bainbridgensis
  • †Archarax
    • †Archarax dalli
  • Architectonica
    • Cf. †Architectonica congnata
  • Shell of an Argobuccinum triton sea snail
    Argobuccinum
    • †Argobuccinum goodspeedi
    • †Argobuccinum mathewsonii
    • †Argobuccinum washingtoniana
  • Aturia angustata
    Lincoln Creek Formation
    Oligocene, WA
    †Aturia
    • Cf. †Aturia alabamensis – or unidentified comparable form
    • †Aturia angustata
    • †Aturia grandior – type locality for species

Molluscs B

  • Barbatia
    • †Barbatia landesi
  • Bathybembix
    • †Bathybembix columbiana
  • Batissa 
    • †Batissa dubia
    • †Batissa newberryi
  • Bonellitia
    • †Bonellitia paucivaricata
  • Brachidontes
    • †Brachidontes (Brachidontes) cowlitzensis (syn=Modiolus cowlitzensis)[91]
    • †Brachidontes dichotomus
  • †Bruclarkia
    • †Bruclarkia oregonensis
    • †Bruclarkia thor
    • †Bruclarkia yaquinana
  • Buccinum
    • †Buccinum percrassum

Molluscs C

  • Cadulus
    • †Cadulus gabbi
  • Calliostoma
    • †Calliostoma mea
  • Callithaca 
    • †Callithaca tenerrima
  • †Calorebama
    • †Calorebama inornata[91]
  • Calyptraea
    • †Calyptraea diegoana[91]
    • †Calyptraea washingtonensis
  • Cancellaria
    • †Cancellaria birchi
    • Cf. †Cancellaria oregonensis
    • Cf. †Cancellaria siletzensis
    • Cf. †Cancellaria simplex
    • †Cancellaria wynoocheensis
  • Cantharus
    • †Cantharus cowlitzensis[91]
  • Cardiomya ? – tentative report
  • Cerithiopsis
    • †Cerithiopsis vaderensis
    • †Cerithiopsis washingtoniana
  • Chama
  • Chione
    • †Chione ensifera
    • †Chione securis
  • Chlamys
  • †Chrysodomus
    • †Chrysodomus imperialis
  • Cidarina
    • †Cidarina antiquua – type locality for species
  • †Cimomia 
    • †Cimomia hesperia – type locality for species
  • Cirsotrema
    • †Cirsotrema saundersi
  • Clavus
  • Clinocardium
  • Colus
    • †Colus sekiuensis - type locality for species[96]
  • †Colwellia
  • †Conchocele 
    • †Conchocele bisecta
  • Conus
    • †Conus aegilops
    • †Conus cowlitzensis
    • †Conus vaderensis[91]
    • †Conus weaveri[91]
    • †Conus weltoni
  • Corbicula
    • †Corbicula cowlitzensis
    • Cf. †Corbicula willisi
  • Corbula
    • †Corbula dickersoni[91]
    • †Corbula parilis
  • Costacallista 
    • †Costacallista conradiana (syn=Microcallista conradiana)[91]
  • †Cowlitzia
    • †Cowlitzia washingtonensis
  • Craspedochiton
    • †Craspedochiton eernissei
  • Crassatella
    • †Crassatella uvasana
    • †Crassatella wasana
    • †Crassatella washingtoniana (syn=Crassatellites washingtoniana)[91]
  • Crenella – tentative report
  • Crepidula
    • †Crepidula praerupta
    • †Crepidula princeps
    • †Crepidula rostralis
    • †Crepidula ungana
  • †Cristispira
    • †Cristispira pugetensis
  • †Cryptochorda 
    • †Cryptochorda californica
  • †Cryptolucina
    • †Cryptolucina megadyseides
  • Cryptomya 
    • †Cryptomya californica
  • Cryptonatica
  • Cyclammina
  • †Cylichnina 
    • †Cylichnina tantilla[91]
  • Cyclocardia
    • †Cyclocardia hannibali
    • †Cyclocardia subtenta
  • Cyclostremella
  • Cymatium
    • †Cymatium cowlitzense[91]
    • †Cymatium washingtonianum[91]
  • Cypraea
  • †Cypraeogemmula 
    • †Cypraeogemmula warnerae

Molluscs D

Molluscs E

  • Echinophoria
    • †Echinophoria dalli
    • †Echinophoria trituberculata (syn=Galeodea trituberculata)[91]
  • †Ectinochilus 
    • †Ectinochilus (Cowlitzia) canalifer supraplicata (syn=Rimella supraplicata)[91]
    • †Ectinochilus macilentus
    • †Ectinochilus washingtonensis[91]
  • Emarginula
    • †Emarginula dotyhillsensis – type locality for species
  • †Eopustularia 
    • †Eopustularia goedertorum – type locality for species
  • Epitonium
    • †Epitonium (Boreoscala) condoni (syn=Arctoscala condoni)[91]
    • †Epitonium berthiaumei
    • †Epitonium clallamense
    • Cf. †Epitonium olympicensis
    • †Epitonium schencki
  • †Eratotrivia 
    • †Eratotrivia crescentensis
  • Erginus
    • †Erginus vaderensis
  • Eulima
    • †Eulima clarki
    • †Eulima lewisiana[91]
  • Eurytellina
    • †Eurytellina lorenzoensis
  • Euspira
    • †Euspira hotsoni[91]
    • †Euspira nuciformis[91]
  • †Eutrephoceras
    • †Eutrephoceras eyerdami – type locality for species
  • Exilia
    • †Exilia clarki
    • †Exilia dickersoni[91]
    • †Exilia mclellani

Molluscs F

A living Fusinus sea snail
  • Falsifusus 
    • †Falsifusus marysvillensis
  • †Ficopsis
    • †Ficopsis cowlitzensis[91]
    • Cf. †Ficopsis redmondi
  • Ficus
    • †Ficus clallamensis
    • †Ficus modesta
    • †Ficus restorationensis
    • †Ficus washingtonensis[39]
  • Fulgoraria
    • †Fulgoraria indurata
    • †Fulgoraria weaveri
  • Fulgurofusus
    • †Fulgurofusus washingtoniana[91]
  • Fusinus
    • †Fusinus dilleri
    • †Fusinus willisi[91]

Molluscs G

  • Shell of a Galeodea helmet snail
    Galeodea
    • †Galeodea apta
    • †Galeodea crescentensis
    • †Galeodea fax
    • †Galeodea petrosa
    • †Galeodea rex
  • Gari
    • Cf. †Gari (Gobraeus) hornii
    • †Gari (Psammobia) columbiana - type locality for species[91]
    • †Gari (Psammobia) cowlitzensis - type locality for species
    • †Gari (Psammobia) olequahensis - type locality for species
  • Fossilized shell of a Gemmula sea snail, or gem turrid
    Gemmula
    • †Gemmula abacta
    • †Gemmula barksdalei
    • †Gemmula borgenae
    • †Gemmula fasteni[91]
    • †Gemmula pluchra
    • †Gemmula pulchra
  • Glycymeris
    • †Glycymeris fresnoensis
    • †Glycymeris sagittata[91]
    • †Glycymeris wishkahensis
  • Gyrineum
    • †Gyrineum marshalli

Molluscs H

Molluscs I

Molluscs K

  • Katherinella 
    • †Katherinella angustiformis
    • †Katherinella angustifrons
    • †Katherinella arnoldi
    • †Katherinella augustifrons
  • Kellia
    • †Kellia twinensis
  • †Kummelonautilus
    • Cf. †Kummelonautilus cookanus

Molluscs L

A living Lepidochitona chiton

Molluscs M

  • Macoma
    • †Macoma albaria
    • †Macoma astori
    • †Macoma calcarea
    • †Macoma inquinata
    • Macoma nasuta
    • Cf. †Macoma secta
    • †Macoma snohomishensis
    • †Macoma sookensis
    • †Macoma twinensis
  • Macrocallista
    • †Macrocallista cathcartensis
  • Mactromeris 
    • †Mactromeris albaria
    • †Mactromeris pittsburgensis
  • Marcia
    • †Marcia oregonensis
  • Margarites
    • †Margarites (Margarites) chappelli
    • †Margarites (Margarites) serceus
    • †Margarites (Pupillaria) columbiana
  • Marginella
    • †Marginella shepardae
  • †Megistostoma 
    • †Megistostoma gabbiana
  • Mitra
    • Fossilized shell found in Vader; the hypotype specimen of the Eocene miter snail Mitra washingtoniana
      †Mitra washingtoniana
  • Modiolus
    • Cf. †Modiolus restorationensis
    • †Modiolus willapaensis
  • †Molopophorus
    • Cf. †Molopophorus newcombei
  • Murex
    • †Murex cowlitzensis
    • †Murex sopenahensis[91]
  • †Mya
  • Mytilus
    • †Mytilus dichotomus[91]
    • Mytilus edulis
    • †Mytilus sammamishensis
    • †Mytilus snohomishensis
    • †Mytilus stillaguamishensis
    • Cf. †Mytilus tichanovitchi

Molluscs N

  • Nassa
    • †Nassa eocenica (syn=Latirus eocenica)[91]
  • Nassarius
    • †Nassarius mednica
  • Multiple views of a fossilized shell belonging to a Natica moon snail
    Natica
    • Cf. †Natica clarki
    • †Natica oligocenica
    • †Natica teglandae
    • †Natica vokesi
    • †Natica weaveri
  • †Nayadina 
    • †Nayadina batequensis
  • †Nekewis 
    • †Nekewis washingtoniana[91]
  • Nemocardium
    • †Nemocardium lincolnensis
    • †Nemocardium linteum
  • Neptunea
    • †Neptunea landesi
    • †Neptunea lincolnensis
    • †Neptunea teglandae
  • Nerita
    • †Nerita triangulata
  • Neverita
    • †Neverita globosa
    • †Neverita jamesae
    • †Neverita reclusiana
  • †Nitidavenus
    • Cf. †Nitidavenus conradi
  • Nucella
  • †Nucleolaria
    • †Nucleolaria cowlitziana – type locality for species
  • Nucula
    • †Nucula hannibali
  • Nuculana
    • †Nuculana aikiensis
    • †Nuculana alkiensis
    • †Nuculana calkinsi
    • †Nuculana chehalisensis
    • †Nuculana cowlitzensis (syn=Leda cowlitzensis)[91]
    • Cf. †Nuculana elmana
    • †Nuculana grasslei
    • †Nuculana posterolaevia – type locality for species[96]
    • †Nuculana vaderensis
    • †Nuculana washingtoni

Molluscs O

Five modern Ostrea lurida, or Olympic oysters

Molluscs P

  • †Pachycrommium 
    • †Pachycrommium clarki
    • †Pachycrommium hendoni[91]
  • Pandora
    • †Pandora vanwinkleae
    • †Pandora washingtonensis
  • Panopea
  • Parvamussium 
    • †Parvamussium stanfordense
  • Patelloida
    • †Patelloida tejonensis
    • †Patelloida vancouverensis[91]
  • Patinopecten
    • †Patinopecten dilleri
  • Pecten
    • †Pecten clallamensis
  • †Perse? – tentative report
  • Persicula
  • Pitar
    • †Pitar avenalensis
    • †Pitar californiana[91]
    • †Pitar (Lammelliconcha) eocenica[91]
    • †Pitar quadratus
    • Cf. †Pitar soledadensis
    • †Pitar wasana
  • Plagiocardium 
    • †Plagiocardium breweri
  • Pleurofusia
    • †Pleurofusia cowlitzensis (syn=Turricula cowlitzensis)[91]
  • Polinices
    • †Polinices gesteri
    • †Polinices hornii[91]
    • †Polinices lewisii
    • †Polinices rectus
    • †Polinices victorianus
    • †Polinices washingtonensis
  • Poromya 
    • †Poromya teglandae
  • Portlandia
    • †Portlandia chehalisensis[98] - type locality for the species (synonym=Yoldia chehalisensis)
    • †Portlandia packardi
  • †Potamides
    • †Potamides lewisiana
    • †Potamides packardi
  • †Priscofusus 
    • †Priscofusus chehalisensis
    • Cf. †Priscofusus geniculus
    • †Priscofusus goweri
    • †Priscofusus sanctaecrucis
    • †Priscofusus slipensis
    • †Priscofusus stewarti
  • †Provanna
    • †Provanna antiqua
  • Psammacoma 
    • †Psammacoma arctata
  • Pseudocardium 
    • †Pseudocardium packardi (syn=Spisula packardi)[91]
  • Pseudoliva
    • †Pseudoliva lineata
  • Pteria
    • †Pteria clarki
    • Cf. †Pteria pellucida
  • Purpura
    • †Purpura lurida
  • Pyramidella
    • †Pyramidella vaderensis

Molluscs R

Molluscs S

  • Saxidomus
  • Scalina
    • †Scalina lincolnensis
  • Scaphander
    • †Scaphander (Mirascapha) costata[91]
    • †Scaphander washingtonensis
  • †Schedocardia
    • †Schedocardia brewerii (syn=Acanthocardia brewerii)[91][99]
  • Semicassis
    • †Semicassis pyshtensis
  • Septifer
    • †Septifer dichotomus
  • Serripes
  • Sinum
    • †Sinum obliquum[91]
    • Cf. †Sinum occidentalis
    • †Sinum scopulosum
  • Shell of the whelk sea snail Siphonalia
    Siphonalia
    • †Siphonalia bicarinata
    • †Siphonalia sopenahensis[91]
  • Solamen
    • †Solamen snavelyi
  • Solariella
    • †Solariella (Solariella) olequahensis
    • †Solariella cicca
    • †Solariella garrardensis
    • †Solariella kincaidi
  • Solen
    • †Solen columbianus[91]
    • †Solen sicarius
  • Solena
    • †Solena clarki
    • †Solena columbina
    • †Solena conradi
    • Cf. †Solena parallelus
  • †Spirocrypta
    • †Spirocrypta pileum[91]
  • Spirotropis
    • †Spirotropis kincaidi
  • Shell of a Spisula, or surf clam
    Spisula
    • Cf. †Spisula hannibali
    • †Spisula sookensis
    • †Spisula twinensis
  • Spondylus
    • †Spondylus carlosensis
  • Stenoplax
    • †Stenoplax quimperensis
  • †Sulcobuccinum
    • †Sulcobuccinum dilleri
  • †Sulcocypraea
    • †Sulcocypraea mathewsonii
  • Surculites
    • †Surculites mathewsoni
    • †Surculites wynoocheensis? – tentative report
  • Sveltella
    • †Sveltella keaseyensis? – tentative report

Molluscs T

Molluscs U

Molluscs V

  • Venericardia
    • †Venericardia castor
    • †Venericardia hannai
    • †Venericardia hornii
    • Cf. †Venericardia weaveri
    • †Venericardia (Pacificor) clarki[91]
  • †Vertipecten
    • †Vertipecten fucanus
  • Vesicomya
    • †Vesicomya chinookensis
  • Volsella (mollusc)
    • †Volsella restorationensis
    • †Volsella trinominata

Molluscs W

  • †Whitneyella
    • †Whitneyella gabbi
    • †Whitneyella markleyensis
    • †Whitneyella sinuata[91]
    • †Whitneyella washingtoniana[91]

Molluscs X

  • Xenoturris
    • †Xenoturris antiselli[100]
  • †Xylodiscula
    • †Xylodiscula okutanii - type locality for species[96]
    • †Xylodiscula vitrea - type locality for species[96]

Molluscs Y

  • Yoldia
    • †Yoldia astoriana[101]
    • †Yoldia blakeleyensis - type locality for species[101]
    • †Yoldia clallamensis – type locality for species
    • †Yoldia duprei - type locality for species[102]
    • †Yoldia newcombi[98]
    • †Yoldia olympiana[98]
    • †Yoldia reagani[98]
    • †Yoldia sammamishensis - type locality for the species[98]
    • †Yoldia temblorensis[101]
    • Cf. †Yoldia supramontereyensis - related form[100]

Arthropods

Arthropods A

Arthropods B

Arthropods C

Arthropods D

Arthropods E

Arthropods F

  • †Folindusia
    • †Folindusia miocenica – type locality for species
  • Foveoscapha
    • Undescribed Klaloch site subfossils[103]

Arthropods G

Arthropods H

Arthropods I

Arthropods K

Arthropods L

Arthropods M

Metanephrocerus belgardeae
Klondike Mountain Formation
Ypresian, Republic
Mursia marcusana
Blakeley Formation
Oligocene, King County
Myrmeciites species
Klondike Mountain Formation
Ypresian, Republic

Arthropods N

Arthropods O

Okanagrion threadgillae
  • Ochthebius
    • †Ochthebius discretus
    • Cf. †Ochthebius holmbergi
  • Ocypus
  • †Oecophylla
    • †Oecophylla kraussei – type locality for species[129]
  • †Okanagrion - type locality for genus
    • †Okanagrion dorrellae - type locality for species[113]
    • †Okanagrion hobani[113]
    • †Okanagrion liquetoalatum - type locality for species[113]
    • †Okanagrion threadgillae - type locality for species[113]
    • †Okanagrion worleyae - type locality for species[113]
  • †Okanopteryx
    • †Okanopteryx jeppesenorum - type locality for species[113]
  • Olophrum
    • †Olophrum boreale
    • †Olophrum consimile
  • Opisthius
    • †Opisthius richardsoni
  • †Orbitoplax[130]
    • †Orbitoplax plafkeri[130]
    • †Orbitoplax tuckerae[130]
  • Orchestes
    • †Orchestes pallicornis
  • †Oregonina[130]
    • †Oregonina leucosiae[130]
  • Cf. Oreodytes
  • Orobanus
  • Oropus
  • †Osmylidia
    • †Osmylidia glastrai - type locality for species [131]
  • Oxytelus

Arthropods P

Arthropods Q

Arthropods R

Fossilized carapace of the Paleogene-modern crab Ranina

Arthropods S

Arthropods T

Arthropods U

Arthropods W

  • †Whetwhetaksa - Type locality of the genus
    • †Whetwhetaksa millerae - Type locality of the species[113]

Arthropods Y

Ypshna brownleei
  • †Ypshna
    • †Ypshna brownleei - Type locality of the species[109]

Arthropods Z

  • †Zanthopsis
    • †Zanthopsis vulgaris[91]

"Fish"

Fossilized skeleton found in Republic belonging to the Eocene-Oligocene sucker fish Amyzon aggregatum
Eosalmo driftwoodensis
Klondike Mountain Formation
Ypresian Republic
Libotonius pearsoni
klondike Mountain Formation
Ypresian Republic

Birds

Tonsala hildegardae
Pysht Formation, Oligocene

Reptiles

Acherontemys heckmani holotype
A living Thamnophis, or garter snake

Mammals

Mammals A

Mammals B

Mammals C

Mammals D

Mammals E

Mammals F

Mammals H

Fossilized lower jaw of the Miocene-Pleistocene llama relative Hemiauchenia

Mammals K

Mammals L

A living Lynx

Mammals M

Life restorations of a Mammut americanum, or American mastodon (right), and a Mammuthus primigenius, or wooly mammoth (left)

Mammals N

Mammals O

Olympicetus thalassodon

Mammals P

Mammals R

Mammals S

Mammals T

Mammals W-Z

Notes

    References

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    60. 1 2 3 DeVore, M. L.; Pigg, K. B. (2007). "A brief review of the fossil history of the family Rosaceae with a focus on the Eocene Okanogan Highlands of eastern Washington State, USA, and British Columbia, Canada". Plant Systematics and Evolution. 266 (1–2): 45–57. Bibcode:2007PSyEv.266...45D. doi:10.1007/s00606-007-0540-3. S2CID 10169419.
    61. ↑ Wang, Q.; Manchester, S. R.; Gregor, H. J.; Shen, S.; Li, Z. Y. (2013). "Fruits of Koelreuteria (Sapindaceae) from the Cenozoic throughout the northern hemisphere: their ecological, evolutionary, and biogeographic implications". American Journal of Botany. 100 (2): 422–449. doi:10.3732/ajb.1200415. PMID 23360930. S2CID 23810529.
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