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List of the Cenozoic life of California

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

A

  • †Abantis
    • †Abantis velifer
  • Abies
    • †Abies concoloroides
    • †Abies klamathensis
  • †Aboma
    • †Aboma antiqua – type locality for species
  • †Acalypha
    • †Acalypha aequalis
  • Acanthina
  • Acanthocardia
    • †Acanthocardia brewerii – type locality for species
    • †Acanthocardia sorrentoense
  • Acar
    • †Acar bailyi – or unidentified comparable form
  • Accipiter
  • Acentrophryne
    • †Acentrophryne longidens
  • Acer
    • †Acer aequidentatum
    • †Acer scottiae
  • Acesta
    • †Acesta multiradiata
  • †Achaenodon
    • †Achaenodon robustus – or unidentified comparable form
  • Acila
    • †Acila castrensis
    • †Acila conradi
    • †Acila decisa
    • †Acila gabbiana
    • †Acila muta
    • †Acila semirostrata – or unidentified comparable form
    • †Acila shumardi
  • Acipenser
  • Acmaea
    • †Acmaea dickersoni – or unidentified related form
    • †Acmaea digitalis – or unidentified comparable form
    • †Acmaea insessa
    • †Acmaea limatula
    • †Acmaea mitra
    • †Acmaea persona
    • †Acmaea ruckmani – or unidentified comparable form
    • †Acmaea tejonensis – or unidentified comparable form
  • Mounted fossilized skeleton of the Miocene horse Acritohippus
    †Acritohippus
    • †Acritohippus isonesus – or unidentified comparable form
    • †Acritohippus quinni – type locality for species
    • †Acritohippus stylodontus
    • †Acritohippus tertius – or unidentified comparable form
  • †Acritoparamys – or unidentified comparable form
  • Acteocina
    • †Acteocina culcitella
    • †Acteocina inculta
    • †Acteocina magdalensis
  • Acteon
    • †Acteon boulderanus
    • †Acteon lawsoni
    • †Acteon punctocaelatus
    • †Acteon traski
  • Actinemys
  • †Acutostrea
    • †Acutostrea idriaensis
    • †Acutostrea miguelensis
  • Admete
  • Adula
    • †Adula californiensis
    • †Adula diegensis
  • Aechmophorus
  • †Aechomophorus
    • †Aechomophorus occidentalis
  • †Aeila
    • †Aeila decisa
  • †Aelurodon
  • Life restoration of the Miocene camel Aepycamelus, or the long-necked camel. Heinrich Harder (1920).
    †Aepycamelus
  • Aequipecten
    • †Aequipecten andersoni
  • Aesopus
    • †Aesopus chrysalloides
  • Aethia
    • †Aethia barnesi – type locality for species
    • †Aethia rossmoori – type locality for species
  • †Aethomylos
    • †Aethomylos simplicidens
  • Agaronia
    • †Agaronia mathewsoni – or unidentified comparable form
    • †Agaronia mathewsonii – or unidentified comparable form
  • †Agasoma
    • †Agasoma acuminatum
    • †Agasoma gravida
    • †Agasoma gravidum
    • †Agasoma kerrianum
    • †Agasoma sinuata
  • Agelaius
    • †Agelaius phoeniceuus
  • Fossilized mandible of the Miocene-Pleistocene bear Agriotherium
    †Agriotherium
  • †Ailanthus
    • †Ailanthus lesquereuxi
  • Akera
    • †Akera maga
  • Alaba
    • †Alaba catalinensis
    • †Alaba jeannettae
  • Alabina
    • †Alabina io – or unidentified comparable form
    • †Alabina tenuisculpta
  • †Albicetus
    • †Albicetus oxymycterus – type locality for species
  • †Albireo
    • †Albireo savagei – type locality for species
  • Alca
  • †Alcodes
    • †Alcodes ulnulus – type locality for species
  • Aleochara
  • Aletes
    • †Aletes squamigerus
  • Restorative model of the Miocene deer relative Aletomeryx
    †Aletomeryx
    • †Aletomeryx occidentalis – type locality for species
  • †Alforjas
  • Aligena
    • †Aligena cerritensis
  • †Alilepus
    • †Alilepus hibbardi
  • †Alisea – type locality for genus
    • †Alisea grandis – type locality for species
  • †Allodelphis – type locality for genus
    • †Allodelphis pratti – type locality for species
    • †Allodelphis woodburnei – type locality for species
  • Fossilized skeleton of the Miocene seal Allodesmus
    †Allodesmus
    • †Allodesmus gracilis – type locality for species
    • †Allodesmus kelloggi – type locality for species
    • †Allodesmus kernensis
  • †Alluvisorex
    • †Alluvisorex chasseae – type locality for species
  • Alnus
    • †Alnus corrallina
    • †Alnus operia
  • †Alopecocyon – type locality for genus
    • †Alopecocyon leardi – type locality for species
  • Alopias
    • †Alopias exigua – or unidentified comparable form
    • †Alopias latidens
    • Caught Alopias vulpinus, or common thresher
      †Alopias vulpinus – or unidentified comparable form
  • Alvania
    • †Alvania acutelirata
    • †Alvania compacta
    • †Alvania iliuliukensis – or unidentified related form
  • †Alveojunctus
    • †Alveojunctus bowni – type locality for species
  • Amaea
  • Amara
  • †Amaurellina
    • †Amaurellina caleocia
    • †Amaurellina martinezensis
    • †Amaurellina moragai
  • Amauropsis
    • †Amauropsis alveata
  • Flowers and foliage of Amelanchier, or shadbush
    Amelanchier
  • Amiantis
    • †Amiantis – type locality for species informal
    • †Amiantis callosa
    • †Amiantis diabloensis
    • †Amiantis mathewsoni
  • Ammobaculites
    • †Ammobaculites cubensis
    • †Ammobaculites strathearnensis – type locality for species
  • Ammospermophilus
    • †Ammospermophilus fossilis
  • †Amorpha
    • †Amorpha condonii
    • †Amorpha oklahomensis
  • †Amphicyon
  • Fossilized skull of the Miocene saber-toothed cat Amphimachairodus
    †Amphimachairodus
    • †Amphimachairodus coloradensis – or unidentified comparable form
  • Amphimorphina
    • †Amphimorphina ignota
  • Amphissa
  • Amphiura
    • †Amphiura santaecrucis
  • †Amphora
    • †Amphora ovalis
    • †Amphora perpusilla
  • †Ampullina
    • †Ampullina schencki – or unidentified comparable form
  • Amusium
    • †Amusium lompocensis
  • †Amussiopecten
    • †Amussiopecten vanvlecki
  • †Amynodon
    • †Amynodon advenus – or unidentified comparable form
    • †Amynodon reedi
  • †Amynodontopsis
    • †Amynodontopsis bodei – type locality for species
  • Anachis
    • †Anachis coronata
  • Collection of Anadara marine ark clams
    Anadara
    • †Anadara devincta
    • †Anadara obispoana
    • †Anadara osmonti
    • †Anadara perlabiata
    • †Anadara reinharti
    • †Anadara rivulata
    • †Anadara santana – type locality for species
    • †Anadara submontereyana
    • †Anadara trilineata
  • Anaphothrips
    • †Anaphothrips vitreus – type locality for species
  • Anas
  • †Anchitheriomys – or unidentified comparable form
  • Fossilized limb bones, and teeth of the Miocene three-toed horse Anchitherium (left)
    †Anchitherium
    • †Anchitherium clarencei
  • †Anchura
    • †Anchura baptos
  • Ancilla
    • †Ancilla fishii
    • †Ancilla gabbi – tentative report
  • †Angelosquilla
    • †Angelosquilla altamirensis
  • Angulogerina
  • Angulus
    • †Angulus buttoni
    • †Angulus castacana
    • †Angulus joaquinensis
    • †Angulus jollaensis – or unidentified comparable form
    • †Angulus longa
    • †Angulus lutea – or unidentified comparable form
  • Anniella
  • Anodontia
    • †Anodontia edentuloides
    • †Anodontia inflata
  • †Anomalina
    • †Anomalina californiensis
    • †Anomalina garzaensis
  • Anomalinoides
    • †Anomalinoides globosa – or unidentified comparable form
  • Anomia
    • †Anomia mcgoniglensis
    • †Anomia peruviana
    • †Anomia vaquerosensis – type locality for species
  • †Ansen
    • †Ansen albifrons
  • Anser
  • †Antecalomys
    • †Antecalomys valensis
    • †Antecalomys vasquezi
  • †Antiacodon
    • †Antiacodon venustus
  • Antigona
    • †Antigona undosa
  • †Antilla
    • †Antilla batequensis
  • A living Antilocapra, or pronghorn
    Antilocapra
  • Antrozous
  • †Anzanycteris
    • †Anzanycteris anzensis
  • †Apataelurus – or unidentified comparable form
  • †Apatemys
    • †Apatemys bellus
    • †Apatemys downsi – type locality for species
    • †Apatemys uintensis
  • Aphelocoma
  • †Aphelophlebodes – type locality for genus
    • †Aphelophlebodes stocki – type locality for species
  • Reconstructive illustration of the skeleton of the Miocene-Pleistocene hornless rhinoceros Aphelops
    †Aphelops
    • †Aphelops megalodus
  • Apiotoma
    • †Apiotoma californiana
  • Aplodontia
  • Aprionodon
  • Apsena
    • †Apsena laticornis – type locality for species
    • †Apsena pubescens
    • †Apsena rufipes
  • Aquila
  • †Araeosteus
  • Arbutus
    • †Arbutus matthesii
  • Arca
    • †Arca hornii – type locality for species
    • †Arca montereyana
    • †Arca pacifica – or unidentified comparable form
    • †Arca santaclarana
    • †Arca sisquocensis
    • †Arca terminumbonis
  • †Arceuthobium
  • Fossilized skull of the Oligocene bone-crushing dog Archaeocyon
    †Archaeocyon
    • †Archaeocyon pavidus
  • †Archaeohippus
    • †Archaeohippus mourningi
    • †Archaeohippus ultimus
  • †Archaeolagus
    • †Archaeolagus acaricolus – type locality for species
  • †Archaeolithothamnion
    • †Archaeolithothamnion keenanii – or unidentified related form
  • Archaeolithothamnium
    • †Archaeolithothamnium keenani – type locality for species
  • †Archaeoparadoxia
    • †Archaeoparadoxia weltoni – type locality for species
  • †Archibuteo
    • †Archibuteo ferrugineus
  • A living Architectonica staircase shell sea snail
    Architectonica
    • †Architectonica cognata
    • †Architectonica llajasensis – type locality for species
    • †Architectonica nobilis
    • †Architectonica tuberculata
    • †Architectonica ullreyana – or unidentified comparable form
  • †Archoheia – tentative report
  • Archoplites
  • Arcinella
    • †Arcinella californica
  • Arctica – tentative report
    • †Arctica weaveri
  • Arctocephalus
  • Restoration of an Arctodus, or short-faced bear, with a human to scale
    †Arctodus
  • †Arctostaphylos
  • Ardea
  • Arenaria
  • Arene
    • †Arene mcleani – type locality for species
  • †Argenna
    • †Argenna fossilis – type locality for species
  • Argobuccinum
    • †Argobuccinum katherineae – type locality for species
    • †Argobuccinum oregonensis
  • Argopecten
  • †Argyrocetus – type locality for genus
    • †Argyrocetus bakersfieldensis – type locality for species
    • †Argyrocetus joaquinensis – type locality for species
  • A modern Argyropelecus silver hatchetfish
    Argyropelecus
    • †Argyropelecus bullocki – type locality for species
    • †Argyropelecus bullockii
  • †Arnoldina – type locality for genus
    • †Arnoldina iniistia – type locality for species
  • Arossia
  • †Artocarpus
    • †Artocarpus lessigiana
  • †Asclepiadites
    • †Asclepiadites laterita – type locality for species
  • A living Asio otus, or long-eared owl
    Asio
  • Asterigerina
    • †Asterigerina crassaformis
  • Astraea
    • †Astraea biangulata – or unidentified comparable form
    • †Astraea gibbosa
    • †Astraea gradata
    • †Astraea morani – type locality for species
    • †Astraea undosa
  • Astrangia
    • †Astrangia grandis – type locality for species
    • †Astrangia insignifica – type locality for species
  • †Astrocoenia – tentative report
  • †Astrocoenta
  • †Astrodapsis
    • †Astrodapsis arnoldi – or unidentified comparable form
    • †Astrodapsis cuyamanus
    • †Astrodapsis fernandoensis
    • †Astrodapsis merriami – tentative report
    • †Astrodapsis spatiosus
  • †Astrodaspis
    • †Astrodaspis arnoldi
  • Astropecten
  • Astyris
    • †Astyris gausapata
  • Athene
  • Athleta
    • †Athleta roddai – type locality for species
  • Fossilized skull of the Miocene dolphin Atocetus
    †Atocetus
  • †Atopotarus – type locality for genus
    • †Atopotarus courseni – type locality for species
  • Atrina
    • †Atrina alamedensis
  • †Aturia
    • †Aturia angustata
    • †Aturia dickersoni – type locality for species
    • †Aturia kerniana – type locality for species
    • †Aturia myrlae – type locality for species
  • †Aturoidea
    • †Aturoidea mathewsonii – type locality for species
  • Atys
  • Life restoration of the Miocene sperm whale Aulophyseter
    †Aulophyseter – type locality for genus
    • †Aulophyseter morricei – type locality for species
  • Austrotrophon
  • †Auxides
    • †Auxides sanctaemonicae
  • †Avipeda
  • Aythya
  • †Azalois – type locality for genus
    • †Azalois angelensis – type locality for species

B

C

D

  • †Dalbergia
    • †Dalbergia rubra – type locality for species
  • Dallocardia
    • †Dallocardia quadragenarium
  • Damalichthys
    • †Damalichthys vacca
  • †Daphoenodon – or unidentified comparable form
  • Mounted fossilized skeleton of the Eocene-Miocene bear-dog Daphoenus
    †Daphoenus
  • †Darbyella
  • Dardanus
  • †Dasceles – type locality for genus
    • †Dasceles dassurus – type locality for species
  • Dasyatis
    • †Dasyatis dipterus
  • Dasyhelea
    • †Dasyhelea antiqua
    • †Dasyhelea browneae – type locality for species
    • †Dasyhelea dara – type locality for species
    • †Dasyhelea judithae – type locality for species
    • †Dasyhelea kanakoffi – type locality for species
    • †Dasyhelea stenoceras – type locality for species
  • A school of living Decapterus, or mackerel scads
    †Decapterus
    • †Decapterus hopkinsi
  • Delectopecten
    • †Delectopecten lillisi
    • †Delectopecten peckhami
  • †Delphinavus – type locality for genus
    • †Delphinavus newhalli – type locality for species
  • Deltochilum – tentative report
  • Deltocyathus
    • †Deltocyathus whitei – type locality for species
  • Dendostrea
    • †Dendostrea vespertina
  • Dendragapus
  • Dendraster
  • Dendrophyllia
    • †Dendrophyllia californiana – type locality for species
    • †Dendrophyllia oldroydi – tentative report
    • †Dendrophyllia tejonensis – type locality for species
  • A living Dendryphantes jumping spider
    Dendryphantes
  • Dentalina
    • †Dentalina approximata
    • †Dentalina consobrina
    • †Dentalina cooperensis
    • †Dentalina jarvisi
    • †Dentalina legumen – or unidentified comparable form
    • †Dentalina nasuta
    • †Dentalina pauperata
    • †Dentalina quadrulata
    • †Dentalina spinosa
  • Dentalium
    • †Dentalium conradi
    • †Dentalium cooperi
    • †Dentalium laneensis
    • †Dentalium mcganna – type locality for species[2]
    • †Dentalium neohexagonum
    • †Dentalium radiolineata – or unidentified comparable form
    • †Dentalium rectius
    • †Dentalium stentor
    • †Dentalium stramineum
  • A living Dermochelys, or leatherback sea turtle
    Dermochelys – or unidentified related form
  • Deroceras
  • †Derrhias – type locality for genus
    • †Derrhias enantius – type locality for species
  • †Desmathyus – or unidentified related form
  • †Desmatippus
    • †Desmatippus avus
  • †Desmatochoerus
    • †Desmatochoerus hesperus
  • †Desmocyon
  • †Desmodium
    • †Desmodium indentum – type locality for species
  • Life restoration of the Oligocene-Miocene herbivorous marine mammal Desmostylus
    †Desmostylus
  • Diacria
  • Diaphana
    • †Diaphana brunnea
  • †Diceratherium
  • Dichocoenia
    • †Dichocoenia merriami
  • †Dinohippus
  • †Dinohyus
  • Diodora
  • †Diomeda
  • Diomedea
    • †Diomedea milleri – type locality for species
  • †Diomedia
    • †Diomedia albatrus
    • †Diomedia nigripes
  • †Dioplotherium
    • †Dioplotherium allisoni
  • A living member of Diospyros, the tree genus including ebonies and persimmons
    †Diospyros
    • †Diospyros oregoniana
    • †Diospyros retinervis
  • Diplodonta
    • †Diplodonta buwaldana
    • †Diplodonta cretacea
    • †Diplodonta orbella
    • †Diplodonta pariiis
    • †Diplodonta parilis
    • †Diplodonta sericata
  • Diploria
    • †Diploria bowersi – type locality for species
  • Dipodomys
  • †Dipoides
    • †Dipoides vallicula
  • †Diprionomys
    • †Diprionomys parvus – or unidentified comparable form
  • Discammina – tentative report
    • †Discammina eocenica
  • Discinisca
    • †Discinisca cumingi
  • Fossilized shell of a Discohelix sea snail
    †Discohelix
    • †Discohelix californicus
  • †Dissacus
  • Distorsio
  • Divalinga
    • †Divalinga eburnea
  • Divaricella
    • †Divaricella cumulata
  • †Domnina
  • †Domninoides
  • Donax
  • †Dorothia
    • †Dorothia californica
  • Dosinia
    • †Dosinia conradi
    • †Dosinia dunkeri
    • †Dosinia jacalitosana
    • †Dosinia margaritana
    • †Dosinia mathewsoni
    • †Dosinia mathewsonii
    • †Dosinia merriami
    • †Dosinia milthoidea – tentative report
    • †Dosinia ponderosa
    • †Dosinia santana – type locality for species
    • †Dosinia semiobliterata – or unidentified comparable form
    • †Dosinia whitneyi
  • †Dosiniopsis
    • †Dosiniopsis stewartvillensis – type locality for species
  • †Drimys – type locality for genus
    • †Drimys defensor – type locality for species
  • †Dromomeryx
  • †Duchesneodus
    • †Duchesneodus uintensis
  • †Dusignathus – type locality for genus
    • †Dusignathus santacruzensis – type locality for species
    • †Dusignathus seftoni – type locality for species
  • Life restoration of the Miocene-Pliocene manatee relative Dusisiren
    †Dusisiren
    • †Dusisiren dewana
    • †Dusisiren jordani – type locality for species
  • †Dyseohyus – type locality for genus
    • †Dyseohyus fricki – type locality for species
  • †Dyseolemur
    • †Dyseolemur pacificus – type locality for species
  • Dytiscus

E

  • Echinarachnius
    • †Echinarachnius fairbanksi
  • Illustration of a living Echinorhinus shark
    Echinorhinus
    • †Echinorhinus blakei
  • Eclipes – type locality for genus
    • †Eclipes extensus
    • †Eclipes manni
    • †Eclipes santamonicae – type locality for species
    • †Eclipes veternus – type locality for species
  • †Ectasis – type locality for genus
    • †Ectasis proriger – type locality for species
  • †Ectinochilus
    • †Ectinochilus macilentus
  • †Ectopistes
  • Eleodes
  • Elgaria
  • †Ellimma
    • †Ellimma barbarae – type locality for species
    • †Ellimma elmodenae – type locality for species
  • †Ellipsonodosaria
    • †Ellipsonodosaria alexanderi – or unidentified comparable form
    • †Ellipsonodosaria atlantisae
    • †Ellipsonodosaria recta
    • †Ellipsonodosaria spinulosa
  • Elliptotellina
    • †Elliptotellina townsendensis – or unidentified comparable form
  • Life restoration of two of the Eocene-Oligocene anthracothere mammal Elomeryx being menaced by fellow-anthracothere Anthracotherium
    †Elomeryx
    • †Elomeryx armatus
  • †Emmachaere – type locality for genus
    • †Emmachaere rhachites – type locality for species
    • †Emmachaere rhomalea
  • †Enaliarctos
  • †Enallagma – type locality for genus
    • †Enallagma kirkbyae – type locality for species
  • Encope
    • †Encope tenuis – type locality for species
  • Engelhardtia
    • †Engelhardtia nevadensis
  • Engina
    • †Engina strongi
  • †Engraulites – type locality for genus
    • †Engraulites remifer – type locality for species
  • Enhydra
  • †Enhydritherium
  • Ensis
    • †Ensis myrae
  • Entomobrya
  • †Eocernia
    • †Eocernia hannibali
  • †Eocypraea
    • †Eocypraea castacensis – or unidentified comparable form
    • †Eocypraea maniobraensis – type locality for species
  • †Eogryphus
    • †Eogryphus tolmani – or unidentified comparable form
  • †Eohaplomys
    • †Eohaplomys matutinus – type locality for species
    • †Eohaplomys serus – type locality for species
    • †Eohaplomys tradux – type locality for species
  • †Eomellivora
    • †Eomellivora wimani – or unidentified comparable form
  • Fossilized skeleton of the Eocene-Pliocene frog Eopelobates
    †Eopelobates
  • †Eopleurotoma
    • †Eopleurotoma whitakerpeakensis – type locality for species
  • †Eoscorpius – type locality for genus
    • †Eoscorpius primaevus – type locality for species
  • †Eosurcula
    • †Eosurcula inconstans – or unidentified related form
  • †Eotaria – type locality for genus
    • †Eotaria citrica – type locality for species
    • †Eotaria crypta – type locality for species
  • †Eotibia
    • †Eotibia llajasensis – type locality for species
  • †Eotylopus
  • †Epelichthys – type locality for genus
    • †Epelichthys michaelis – type locality for species
  • Mounted fossilized skeleton of the Miocene bone-crushing dog Epicyon
    †Epicyon
  • †Epihippus
  • Epilucina
  • Epinephelus
  • †Epiphragmophora
    • †Epiphragmophora mormonum
  • †Epistomina
    • †Epistomina eocenica
  • Shell of an Epitonium wentletrap sea snail
    Epitonium
    • †Epitonium bellastriata
    • †Epitonium bellastriatum
    • †Epitonium clarki
    • †Epitonium condoni
    • †Epitonium cookii – or unidentified related form
    • †Epitonium cooperi
    • †Epitonium indianorum
    • †Epitonium insculptum
    • †Epitonium rugiferum – or unidentified comparable form
    • †Epitonium sawinae
  • Eponides
    • †Eponides keenani
    • †Eponides kleinpelli
    • †Eponides lodoensis
    • †Eponides umbonatus
  • Eptesicus
  • †Equisetum
  • Equus
  • Eremophila
  • Erethizon
    • †Erethizon bathygnathum
    • †Erethizon cascoensis – type locality for species
    • †Erethizon dorsatum
  • †Eriquius
    • †Eriquius plectrodes
  • †Erisceles – type locality for genus
    • †Erisceles pristinus – type locality for species
  • †Eritima
    • †Eritima evides – type locality for species
  • †Escharion – type locality for genus
    • †Escharion townleyi – type locality for species
  • Eschrichtius
  • †Etringus
    • †Etringus scintillans
  • Eubalaena – or unidentified comparable form
  • †Eucastor
  • Life restoration of the Pleistocene bovid Euceratherium, or the shrub ox. Robert Bruce Horsfall (1913).
    †Euceratherium – type locality for genus
  • Eucrassatella
    • †Eucrassatella semidentata
    • †Eucrassatella subgibbosus – type locality for species
  • †Eucyon
  • Euleptorhamphus
    • †Euleptorhamphus peronides
  • Eumetopias
    • †Eumetopias jubata
  • †Euoplocyon
    • †Euoplocyon brachygnathus
  • Eupatagus
    • †Eupatagus stevensi
  • Euphagus
  • Eurytellina
    • †Eurytellina lorenzoensis
  • Euscelis
    • †Euscelis palmeri – type locality for species
  • A living Eusmilia stony coral
    Eusmilia
    • †Eusmilia carrizensis – type locality for species
  • Euspira
    • †Euspira gesteri
    • †Euspira hornii
    • †Euspira lewisii
    • †Euspira muriciformis
    • †Euspira nuciformis
  • †Euspirocromium
    • †Euspirocromium martinezensis
  • †Euspirocrommium
    • †Euspirocrommium martinezensis
  • A living Eutamias chipmunk
    Eutamias
  • †Eutrephoceras
    • †Eutrephoceras hallidayi
    • †Eutrephoceras hannai
    • †Eutrephoceras marksi
    • †Eutrephoceras stephensoni – type locality for species
  • Euvola
  • †Evesthes
    • †Evesthes jordani
  • †Exaeretoptera – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Exaeretoptera fosteri – type locality for species
  • †Exilia
    • †Exilia fausta
    • †Exilia talliaferroi – or unidentified comparable form

F

  • Falco
  • Falsifusus
  • Farrea
    • †Farrea rugosa – type locality for species
  • Fartulum
    • †Fartulum hemphilli
    • †Fartulum occidentale
  • Felaniella
    • †Felaniella harfordi
  • Felis
    • †Felis lacustris
    • †Felis rexroadensis
  • †Ficopsis
    • †Ficopsis cooperiana
    • †Ficopsis crescentensis
    • †Ficopsis horni
    • †Ficopsis meganosensis – type locality for species
    • †Ficopsis redmondii
    • †Ficopsis remondi
    • †Ficopsis remondii
  • A living Ficus, or fig tree
    Ficus
    • †Ficus decussata
    • †Ficus densifolia
    • †Ficus gesteri
    • †Ficus goshenensis
    • †Ficus modesta – or unidentified comparable form
    • †Ficus nodiferum
    • †Ficus ocoyana
    • †Ficus pyriformis
  • Fimbria
    • †Fimbria pacifica
    • †Fimbria susanensis – type locality for species
  • Fissurella
  • Fossilized shell of the Oligocen-modern scallop Flabellipecten
    Flabellipecten
    • †Flabellipecten carrizoensis
    • †Flabellipecten stearnsii
  • Flabellum
    • †Flabellum californicum
    • †Flabellum clarki – type locality for species
    • †Flabellum cuneiforme
    • †Flabellum stantoni
  • †Forestiera
    • †Forestiera buchananensis
  • †Forfex – type locality for genus
    • †Forfex hypuralis – type locality for species
  • Forreria
    • †Forreria belchei
    • †Forreria belcheri
    • †Forreria carisaensis
    • †Forreria coalingensis
  • †Fragilaria
    • †Fragilaria brevistriata
    • †Fragilaria construens
    • †Fragilaria pinnata
  • Fratercula
  • †Fraxinus
    • †Fraxinus yubaensis – type locality for species
  • Frondicularia
    • †Frondicularia tenuissima
  • Fulgoraria
    • †Fulgoraria prevostiana
    • †Fulgoraria zinsmeisteri – type locality for species
  • †Fulica
  • Fulmarus
    • †Fulmarus glacialis
    • †Fulmarus griseus
    • †Fulmarus hammeri – type locality for species
    • †Fulmarus miocaenus – type locality for species
  • Fusimitra – tentative report
    • †Fusimitra simplicissima – or unidentified comparable form
  • Fusinus
    • †Fusinus barbarensis
    • †Fusinus calabasensis
    • †Fusinus chehalisensis – or unidentified comparable form
    • †Fusinus hecoxi
    • †Fusinus lincolnensis – or unidentified related form
    • †Fusinus luteopictus
    • †Fusinus meganosensis – type locality for species
    • †Fusinus merriami – or unidentified related form
    • †Fusinus simiensis

G

H

I

J

  • †Jacobsomys
    • †Jacobsomys dailyi – type locality for species
  • †Jamilcotatus
    • †Jamilcotatus boreios – type locality for species
  • Jaton
    • †Jaton eldridgei
    • †Jaton festivus
  • †Johannsenomyia
    • †Johannsenomyia hotchkissae – type locality for species
  • Jouannetia
  • Juliacorbula
    • †Juliacorbula luteola
  • †Julus
    • †Julus cavicola – type locality for species
    • †Julus occidentalis – type locality for species
  • †Jumaraina
    • †Jumaraina rinconensis – type locality for species
  • †Juncus
  • A living Juniperus, or juniper tree
    Juniperus

K

  • Kalolophus
    • †Kalolophus antillarum – or unidentified comparable form
  • †Kampholophos – type locality for genus
    • †Kampholophos serrulus – type locality for species
  • Karreriella
    • †Karreriella barbati
    • †Karreriella mediaaquaensis
  • Katherinella
  • Kelletia
  • Kellia
    • †Kellia suborbicularis
  • Life restoration of the Oligocene-Miocene dolphin Kentriodon
    †Kentriodon – type locality for genus
    • †Kentriodon obscurus – type locality for species
  • †Keteleeria
    • †Keteleeria heterophylloides
  • †Kewia – tentative report
    • †Kewia fairbanksi – or unidentified comparable form
  • †Kingena
    • †Kingena simiensis
  • †Kirkomys – or unidentified comparable form
  • †Knightomys – or unidentified comparable form
  • †Kummelonautilus
  • Kurtiella
    • †Kurtiella tumida
  • Kurtzia
  • Kurtziella

L

M

  • †Machaeromeryx – tentative report
    • †Machaeromeryx tragulus
  • Fossilized cranium of the Miocene-Pleistocene saber-toothed cat Machairodus
    †Machairodus
  • Macoma
    • †Macoma andersoni
    • †Macoma calcarea
    • †Macoma carlottensis
    • †Macoma copelandi
    • †Macoma diabloensis
    • †Macoma expansa
    • †Macoma indentata
    • †Macoma inquinata
    • †Macoma moesta
    • Shell of Macoma nasuta, or the bent-nosed clam
      †Macoma nasuta
    • †Macoma pabloensis – or unidentified comparable form
    • †Macoma panzana
    • †Macoma planiuscula – or unidentified comparable form
    • †Macoma secta
    • †Macoma viticola
  • Macrarene
  • Macrocallista
    • †Macrocallista furlongi – or unidentified comparable form
    • †Macrocallista horni – or unidentified comparable form
    • †Macrocallista meganosensis – type locality for species
    • †Macrocallista pittsburgensis
    • †Macrocallista squalida
    • †Macrocallista squalidus
    • †Macrocallista weaveri
  • †Macrochlamis
    • †Macrochlamis magnolia
  • Life restoration of the Oligocene toothed-whale Macrodelphinus (background)
    †Macrodelphinus – type locality for genus
    • †Macrodelphinus kelloggi – type locality for species
  • †Macrotarsius
    • †Macrotarsius roederi – type locality for species
  • Mactromeris
    • †Mactromeris abbotti
    • †Mactromeris acutirostrata – or unidentified comparable form
    • †Mactromeris albaria
    • †Mactromeris bisculpturata – or unidentified comparable form
    • †Mactromeris brevirostrata
    • †Mactromeris catilliformis
    • †Mactromeris hemphillii
    • †Mactromeris mercedensis – or unidentified comparable form
    • †Mactromeris merriami
    • †Mactromeris montereyana – type locality for species
    • †Mactromeris muliniaformis – type locality for species
    • †Mactromeris pittsburgensis – or unidentified comparable form
    • †Mactromeris polynyma
    • †Mactromeris ramonensis
    • †Mactromeris rushi
    • †Mactromeris sectoris
    • †Mactromeris tejonensis
  • Mactrotoma
    • †Mactrotoma californica
    • †Mactrotoma nasuta
  • Madracis
    • †Madracis wellsi – type locality for species
  • Madrepora
    • †Madrepora solida – type locality for species
  • Close-up view of a Magnolia flower
    Magnolia
    • †Magnolia corrallina
    • †Magnolia dayana
  • Mahonia
    • †Mahonia macginitiei
    • †Mahonia reticulata
    • †Mahonia simplex
  • Makaira
  • Malea
  • Malletia
  • Mallotus
    • †Mallotus riparius
  • †Mambrinia
    • †Mambrinia gallica – type locality for species
  • †Mammut[3]
  • †Mammuthus
  • †Mancalla – type locality for genus
  • †Mangelia
    • †Mangelia variegata
  • †Margaritana
    • †Margaritana falcata – or unidentified comparable form
  • Margarites
  • A living Marginella margin sea snail
    Marginella
  • Marginulina
    • †Marginulina adunca – or unidentified comparable form
    • †Marginulina dubia
    • †Marginulina eximia
    • †Marginulina munda
  • Marmota
  • †Marshochoerus
    • †Marshochoerus socialis
  • A living Martes, or marten
    Martes
  • Martesia
    • †Martesia meganosensis – type locality for species
  • †Martinogale
    • †Martinogale faulli – type locality for species
  • Martinottiella
    • †Martinottiella eocenica
  • Maxwellia
  • †Mayena – tentative report
    • †Mayena kewi – or unidentified comparable form
  • †Mealanitta
    • †Mealanitta deglandi
  • †Mediochoerus
    • †Mediochoerus mohavensis
  • †Megacamelus
    • †Megacamelus merriami
  • Megachasma
  • Megachile
  • †Megahippus
    • †Megahippus matthewi
    • †Megahippus mckennai – type locality for species
  • Mounted fossilized skeleton of the Miocene-Pleistocene ground sloth Megalonyx
    †Megalonyx
  • Megalops – tentative report
    • †Megalops vigilax
  • †Megapaloelodus
    • †Megapaloelodus connectens
  • †Megapetalus
  • Megaptera
  • Megatebennus
    • †Megatebennus bimaculata
    • †Megatebennus bimaculatus
  • Megathura – tentative report
  • †Megatylopus
    • †Megatylopus matthewi – or unidentified comparable form
  • †Megistostoma
    • †Megistostoma gabbiana – or unidentified comparable form
  • Melampus
    • †Melampus olivaceous
    • †Melampus olivaceus
  • Melanella
    • †Melanella hastata
    • †Melanella micans
  • Melanitta
  • Melanoplus
  • Melanthrips
  • Meleagris
    • †Meleagris richmondi – type locality for species
  • †Meliosma
    • †Meliosma truncata – type locality for species
  • †Melosira
    • †Melosira solida
  • Melospiza
  • †Meniscomys
  • †Meniscotherium
    • †Meniscotherium tapiacitum
  • Life restoration of the Miocene rhinoceros Menoceras
    †Menoceras
  • Mephitis
  • †Mercyhippus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Mercyhippus brevidontus
  • Meretrix
    • †Meretrix californica
    • †Meretrix conradi
    • †Meretrix hornii
    • †Meretrix lorenzana
    • †Meretrix palmeri – type locality for species
    • †Meretrix stantoni
    • †Meretrix uvasana – type locality for species
  • Mergus
  • Merluccius
  • †Merriamina – type locality for genus
    • †Merriamina ectenes – type locality for species
  • Life restoration of the Miocene pronghorn Merriamoceros with an anachronistic human to scale
    †Merriamoceros
    • †Merriamoceros coronatus – type locality for species
  • †Merychippus
    • †Merychippus brevidontus – type locality for species
    • †Merychippus californicus – type locality for species
    • †Merychippus relictus – or unidentified comparable form
    • †Merychippus stevensi
  • †Merychyus
    • †Merychyus elegans
    • †Merychyus minimus
    • †Merychyus novomexicanus
    • †Merychyus smithi
  • †Merycobunodon
    • †Merycobunodon littoralis – type locality for species
  • Mounted fossilized skeleton of the Miocene pronghorn Merycodus
    †Merycodus
    • †Merycodus joraki
    • †Merycodus necatus
  • Mesalia
    • †Mesalia clarki – type locality for species
    • †Mesalia martinezensis
  • †Mesocyon
    • †Mesocyon brachyops
    • †Mesocyon coryphaeus
  • †Mesodma – tentative report
  • †Mesohippus
  • Mesophyllum
    • †Mesophyllum californicum
    • †Mesophyllum fructiferum
    • †Mesophyllum obsitum
    • †Mesophyllum schenckii – type locality for species
    • †Mesophyllum schenki
  • Fossilized skull of the Miocene oreodont mammal Mesoreodon
    †Mesoreodon
    • †Mesoreodon chelonyx
  • †Metacerithium
    • †Metacerithium packardi
  • †Metalopex
    • †Metalopex merriami
  • †Metanoiamys
    • †Metanoiamys agorus – type locality for species
    • †Metanoiamys fantasma
    • †Metanoiamys korthi – type locality for species
    • †Metanoiamys marinus – type locality for species
  • †Metarhinus
    • †Metarhinus pater – type locality for species
  • †Metatomarctus
  • Mounted fossilized skeleton of the Miocene-Pleistocene manatee relative Metaxytherium
    †Metaxytherium
    • †Metaxytherium arctodites
  • †Metechinus
    • †Metechinus amplior
  • †Miacis
    • †Miacis hookwayi – type locality for species
  • †Michenia
    • †Michenia agatensis
    • †Michenia mudhillsensis
  • Micranellum
    • †Micranellum crebricinctum
  • †Microcosmodon – or unidentified comparable form
  • Microdipodops
  • A modern Microgadus, or tomcod
    Microgadus – tentative report
  • †Micropallus
    • †Micropallus whitneyi
  • †Microparamys
    • †Microparamys minutus – or unidentified comparable form
    • †Microparamys tricus – type locality for species
    • †Microparamys woodi – type locality for species
  • †Microsula
  • †Microsyops
    • †Microsyops annectens – or unidentified comparable form
    • †Microsyops kratos – type locality for species
  • †Microtomarctus
    • †Microtomarctus conferta
  • Microtus
  • Mictomys
    • †Mictomys kansasensis
    • †Mictomys vetus
  • Miltha
    • †Miltha meganosensis – type locality for species
    • †Miltha packi
    • †Miltha sanctaecrucis
    • †Miltha xantusi
  • †Mimomys
  • †Mimotricentes
    • †Mimotricentes tedfordi – type locality for species
  • †Miochlorotettix – type locality for genus
    • †Miochlorotettix gibroni – type locality for species
    • †Miochlorotettix kirkbyi – type locality for species
  • †Miocryptorhopalum – type locality for genus
    • †Miocryptorhopalum kirkbyae – type locality for species
  • †Miocyon
    • †Miocyon scotti – or unidentified comparable form
  • †Miodelphis – type locality for genus
    • †Miodelphis californicus – type locality for species
  • †Miogonates – type locality for genus
    • †Miogonates subimpunctatus – type locality for species
  • †Miohierax – type locality for genus
    • †Miohierax stocki – type locality for species
  • †Miohippus
    • †Miohippus annectens
  • †Miolabis
    • †Miolabis californicus – type locality for species
    • †Miolabis fricki – type locality for species
  • Fossilized skull (top) and interpretive line drawing (middle) of the Miocene auk relative Miomancalla compared with the skull of a Holocene Pinguinus impennis, or great auk
    †Miomancalla
  • †Miomesamia – type locality for genus
    • †Miomesamia juliae – type locality for species
  • †Miomonalonion – type locality for genus
    • †Miomonalonion conoidifrons – type locality for species
  • †Miomustela
  • †Mionictis
    • †Mionictis angustidens
  • †Miospermophilus
    • †Miospermophilus wyomingensis – or unidentified comparable form
  • †Miosula – type locality for genus
    • †Miosula media – type locality for species
  • †Miotapirus
  • †Miotomodon
    • †Miotomodon mayi – type locality for species
  • †Miotroctes – type locality for genus
    • †Miotroctes rousei – type locality for species
  • †Miotylopus
    • †Miotylopus gibbi
  • Restoration of the Pliocene-Pleistocene Miracinonyx, or American cheetah
    †Miracinonyx
  • Mirounga
  • Mitra
  • Mitrella
  • †Mixocetus – type locality for genus
    • †Mixocetus elysius – type locality for species
  • Modiolatus
    • †Modiolatus rectus
  • Modiolus
    • Exterior (left) and interior of the shell of a Modiolus capax, or fat horsemussel
      †Modiolus capax – or unidentified comparable form
    • †Modiolus carpenteri
    • †Modiolus multiradiatus
    • †Modiolus ornatus
    • †Modiolus veronensis
    • †Modiolus ynezianus
  • Modulus
    • †Modulus unidens
  • †Mojavemys
    • †Mojavemys alexandrae – type locality for species
    • †Mojavemys lophatus
    • †Mojavemys wilsoni
  • †Molopophorus
    • †Molopophorus aequicostatus – or unidentified comparable form
    • †Molopophorus antiquatus
    • †Molopophorus biplicatus
    • †Molopophorus californicus – type locality for species
    • †Molopophorus dalli
    • †Molopophorus tejonensis
  • Moniliopsis
    • †Moniliopsis incisa
  • Shell in multiple views of a Monoplex triton sea snail
    Monoplex
  • †Monosaulax
    • †Monosaulax pansus
  • Montipora
  • †Mookomys
    • †Mookomys formicarum
    • †Mookomys subtilis
  • Mopalia
  • Mounted fossilized skeleton of the Miocene chalicothere mammal Moropus
    †Moropus
  • Morula
    • †Morula lugubris
  • Morus – or unidentified comparable form
  • Morus
    • †Morus humeralis – type locality for species
    • †Morus lompocanus – type locality for species
    • †Morus magnus – type locality for species
    • †Morus recentior – type locality for species
    • †Morus reyana – type locality for species
    • †Morus reyma
    • †Morus reyna
    • †Morus vagabundus – type locality for species
  • Mulinia
    • †Mulinia pallida
  • Murex – or unidentified related form
    • †Murex mansfieldi – or unidentified related form
  • Musculus
  • Mustela
  • †Mya
  • †Myadesma
    • †Myadesma pacifica
  • Myctophum
  • Myliobatis
  • Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus
    †Mylohyus
  • †Mylopharodon
  • Mysella
    • †Mysella aleutica
  • Mytilimeria
    • Mytilimeria nuttalli
  • Mytilus
  • †Mytonolagus
  • †Mytonomys
    • †Mytonomys burkei – type locality for species
    • †Mytonomys mytonensis – or unidentified comparable form
  • Myurella
    • †Myurella martini

N

O

P

  • †Pachycrommium
    • †Pachycrommium clarki
  • †Paciculus
  • †Pacifichelys
    • †Pacifichelys hutchisoni – type locality for species
  • †Pacipecten
    • †Pacipecten discus
    • †Pacipecten pabloensis – or unidentified comparable form
  • †Palaeolagus
  • †Palaeolama
  • †Palaeopsammia
    • †Palaeopsammia zitteli
  • †Palaeoxantusia
    • †Palaeoxantusia allisoni
    • †Palaeoxantusia kyrentos
  • Restoration of the Miocene aquatic mammal Paleoparadoxia
    †Paleoparadoxia
  • †Paleosula – type locality for genus
    • †Paleosula stocktoni – type locality for species
  • Palpomyia – type locality for genus
    • †Palpomyia freyi – type locality for species
    • †Palpomyia multispinosa – type locality for species
    • †Palpomyia ryshkoffi – type locality for species
    • †Palpomyia shilo – type locality for species
  • Pandora
    • †Pandora punctata
    • †Pandora wardiana
  • †Panolax
    • †Panolax sanctaefidei
  • Panomya
    • †Panomya ampla
  • Panopea
    • †Panopea abrupta
    • †Panopea estrellana – or unidentified related form
    • †Panopea ramonensis
    • †Panopea smithii
    • †Panopea tenuis
  • Panthera
  • †Parabalaenoptera – type locality for genus
  • Paraconcavus
  • †Paracontogenys
    • †Paracontogenys estesi
  • †Paracosoryx
    • †Paracosoryx alticornis
    • †Paracosoryx furlongi
  • †Paraculicoides – type locality for genus
    • †Paraculicoides rouseae – type locality for species
  • Paracyathus
    • †Paracyathus pedroensis – type locality for species
    • †Paracyathus stearnsii
  • †Paracynarctus
    • †Paracynarctus kelloggi
  • †Paradjidaumo
    • †Paradjidaumo reynoldsi – type locality for species
  • †Paradomnina
    • †Paradomnina relictus – or unidentified comparable form
  • †Parafundulus
    • †Parafundulus erdisi
  • Fossilized skull of the Miocene horse Parahippus
    †Parahippus
    • †Parahippus maxsoni – type locality for species
    • †Parahippus pawniensis
  • †Parahyus
  • †Paralichthyes
  • Paralichthys – type locality for genus
    • †Paralichthys antiquus
  • †Paramerychyus
    • †Paramerychyus harrisonensis
    • †Paramerychyus relictus
  • †Paramiolabis
    • †Paramiolabis minutus – type locality for species
    • †Paramiolabis singularis – or unidentified comparable form
    • †Paramiolabis taylori
    • †Paramiolabis tenuis
  • Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
    †Paramylodon
  • †Paramys
    • †Paramys compressidens – or unidentified comparable form
    • †Paramys leptodus – or unidentified comparable form
  • †Parapavo
    • †Parapavo californica
    • †Parapavo californicus
  • †Parapliohippus
    • †Parapliohippus carrizoensis – type locality for species
  • Life restoration of the Miocene-Pliocene dolphin Parapontoporia (top)
    †Parapontoporia
  • †Parasauromalus
    • †Parasauromalus olseni
  • Paraseraphs
    • †Paraseraphs erraticus
  • †Parastylotermes
  • †Paratomarctus
    • †Paratomarctus temerarius
  • †Pareumys
    • †Pareumys grangeri
    • †Pareumys milleri
  • Life restoration of the Miocene baleen whale Parietobalaena and calf
    †Parietobalaena
    • †Parietobalaena securis – type locality for species
  • †Paromomys
    • †Paromomys depressidens
  • †Paronychomys
  • †Parribacus
    • †Parribacus caesius – type locality for species
  • Parvamussium
  • †Parvicornus – type locality for genus
    • †Parvicornus occidentalis – type locality for species
  • Parvilucina
    • †Parvilucina approximata
    • †Parvilucina tenuisculpta
  • †Parvisipho – tentative report
    • †Parvisipho meganosensis – type locality for species
  • Shell of a Patelloida limpet
    Patelloida
    • †Patelloida tejonensis
    • †Patelloida triquetrus
  • Patinopecten
    • †Patinopecten caurinus
    • †Patinopecten coosensis
    • †Patinopecten healeyi
    • †Patinopecten healyi
    • †Patinopecten lohri
    • †Patinopecten propatulus
  • †Patriolestes
    • †Patriolestes novaceki – type locality for species
  • †Pauromys
    • †Pauromys lillegraveni – type locality for species
  • †Pecoripeda
  • Pecten
    Pecten
    • †Pecten bellus
    • †Pecten bowersi
    • †Pecten dickersoni
    • †Pecten estrellanis
    • †Pecten magnolia
    • †Pecten nevadensis
    • †Pecten perrini
    • †Pecten sespeensis
  • †Pedalion
    • †Pedalion panzana – or unidentified comparable form
  • †Pediomeryx
    • †Pediomeryx hemphillensis
  • †Pedipes
    • †Pedipes liratus
    • †Pedipes unisulcatus
  • †Pelagiarctos – type locality for genus
  • Reconstructive illustration of a fossilized skull of the Oligocene-Pleistocene pseudo-toothed bird Pelagornis, with close-up insets of its pseudo-teeth
    †Pelagornis
  • Pelecanus
  • †Peltosaurus
    • †Peltosaurus macrodon – type locality for species
  • Penitella
    • †Penitella penita
  • †Peraceras
    • †Peraceras superciliosum
  • †Peradectes
    • †Peradectes californicus
  • †Periaster
  • Pericosmus
  • †Peridiomys
    • †Peridiomys oregonensis – or unidentified comparable form
  • Interior of the shell of a Periglypta venus clam
    Periglypta
    • †Periglypta multicostata
  • Periploma
    • †Periploma planiuscula
    • †Periploma stewartvillensis – type locality for species
  • †Peripolocetus – type locality for genus
    • †Peripolocetus vexillifer – type locality for species
  • †Perissitys
    • †Perissitys stewarti
  • †Perissolax
    • †Perissolax blakei
    • †Perissolax tricarinatus
  • †Perognathoides
    • †Perognathoides eurekensis
  • A living Perognathus pocket mouse
    Perognathus
    • †Perognathus furlongi
    • †Perognathus minutus
  • Peromyscus
    • †Peromyscus baumgartneri
    • †Peromyscus boylei
    • †Peromyscus complexus – type locality for species
    • †Peromyscus dentalis
    • †Peromyscus hagermanensis
    • †Peromyscus irvingtonensis – type locality for species
    • †Peromyscus maximus – type locality for species
    • †Peromyscus truei – or unidentified comparable form
  • †Perse
    • †Perse lincolnensis
  • Persea
    • †Persea coalingensis
    • †Persea praelingue
    • †Persea pseudocarolinensis
  • Fossilized shell of the Oligocene-modern conch sea snail Persististrombus
    Persististrombus
    • †Persististrombus obliteratus – type locality for species
  • †Petauristodon
    • †Petauristodon jamesi
    • †Petauristodon mathewsi
    • †Petauristodon minimus
    • †Petauristodon uphami
  • Petricola
    • †Petricola carditoides
    • †Petricola cognata
    • †Petricola denticulata
    • †Petricola parallela
  • Petrophyllia
    • †Petrophyllia clarki
    • †Petrophyllia weaveri
  • †Pewelagus
    • †Pewelagus dawsonae
  • Phacoides
    • †Phacoides actulineatus
    • †Phacoides sactaecrucis – tentative report
  • Phalacrocorax
  • Phalaropus
  • †Phanaeus
    • †Phanaeus labreae – type locality for species
  • †Phelosaccomys
    • †Phelosaccomys shotwelli – type locality for species
  • †Phenacolemur
    • †Phenacolemur shifrae
  • Illustration of a fossilized skull in multiple views of the Oligocene-Miocene bone-crushing dog Phlaocyon
    †Phlaocyon
    • †Phlaocyon taylori
  • †Phlepsius
    • †Phlepsius weissmanae – type locality for species
  • Phloeodes
  • †Phoberogale
    • †Phoberogale shareri – type locality for species
  • Phoca
  • Phocoena – or unidentified comparable form
  • †Phoebastria
    • †Phoebastria albatrus – type locality for species
    • †Phoebastria anglica – type locality for species
  • Two Phoenicopterus, or flamingos
    Phoenicopterus – or unidentified comparable form
  • Pholadidea
  • Pholadomya
    • †Pholadomya mounti
    • †Pholadomya nasuta
  • Pholas
    • †Pholas gabbi
  • Phos
    • †Phos blakianus – or unidentified comparable form
    • †Phos dumbleanus
  • †Photinia
    • †Photinia miocenica
  • A living Phrynosoma, or horned lizard
    Phrynosoma
  • †Phyllites
    • †Phyllites californica
    • †Phyllites coalingensis
    • †Phyllites cordiaefolia – type locality for species
    • †Phyllites daturaefolia – type locality for species
    • †Phyllites domenginensis
    • †Phyllites ellipticus
    • †Phyllites laurinea
    • †Phyllites temblorensis
  • Phyllonotus
    • †Phyllonotus hippocastanum
    • †Phyllonotus radix
  • A live individual of Physa marmorata
    Physa
  • †Physiculua
  • Phytocrene
    • †Phytocrene sordida
  • Picea
    • †Picea lahontense
    • †Picea magna
    • †Picea sonomensis
  • †Pimelometopodon
    • †Pimelometopodon pulchrum – or unidentified comparable form
  • Pimelometopon
    • †Pimelometopon pulchrum
  • Pinna
    • †Pinna alamedaensis
    • †Pinna latrania – type locality for species
    • †Pinna lewisi
    • †Pinna llajasensis – type locality for species
    • †Pinna mendenhalli – type locality for species
  • †Pinnarctidion – type locality for genus
    • †Pinnarctidion bishopi – type locality for species
  • Pinus
    • †Pinus carmelensis – type locality for species
    • †Pinus muricata
    • †Pinus prelambertiana – or unidentified comparable form
    • †Pinus radiata
    • †Pinus sturgisii
    • †Pinus temblorensis
  • Piranga
  • †Piscolithax
  • Shell of a Pitar venus clam
    Pitar
    • †Pitar avenalensis – tentative report
    • †Pitar behri
    • †Pitar california – or unidentified comparable form
    • †Pitar californiana
    • †Pitar campi – or unidentified comparable form
    • †Pitar dalli
    • †Pitar joaquinensis
    • †Pitar newcombianus
    • †Pitar quadratus
    • †Pitar stantoni – or unidentified comparable form
    • †Pitar tejonensis – or unidentified comparable form
    • †Pitar uvasana
    • †Pitar uvasanus
  • †Pithanodelphis
  • †Pithanotaria – type locality for genus
    • †Pithanotaria starri – type locality for species
  • Pituophis
  • Pitymys
    • †Pitymys mcnowni – or unidentified comparable form
  • Placunanomia
    • †Placunanomia granti
  • Planularia
    • †Planularia caribbeana
  • †Platanophyllum
    • †Platanophyllum angustiloba
    • †Platanophyllum whitenyi
    • †Platanophyllum whitneyi
  • Platanus
    • †Platanus angustilobus – type locality for species
    • †Platanus appendiculata
    • †Platanus coloradensis
    • †Platanus dissecta – or unidentified comparable form
    • †Platanus paucidentata
  • Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).
    †Platygonus
    • †Platygonus bicalcaratus
    • †Platygonus vetus
  • †Platylithax – type locality for genus
    • †Platylithax robusta – type locality for species
  • Platynus
    • †Platynus funebris – or unidentified comparable form
  • Platyodon
    • †Platyodon cancellata
    • †Platyodon cancellatus
  • †Platyoptera
    • †Platyoptera pacifica
  • Platytrochus
    • †Platytrochus diabloensis – type locality for species
    • †Platytrochus merriami – type locality for species
  • †Plectina
    • †Plectina garzaensis
    • †Plectina ruthenica – or unidentified comparable form
  • Plectofrondicularia
    • †Plectofrondicularia kerni
    • †Plectofrondicularia miocenica
    • †Plectofrondicularia packardi
    • †Plectofrondicularia trinitatensis
    • †Plectofrondicularia vaughani
  • †Plectrites
    • †Plectrites classeni
  • Plegadis
  • †Pleiolama
    • †Pleiolama vera
  • Life restoration of the Paleocene-Eocene primate Plesiadapis
    †Plesiadapis
    • †Plesiadapis anceps – or unidentified comparable form
    • †Plesiadapis churchilli – or unidentified comparable form
  • †Plesiogulo
    • †Plesiogulo lindsayi
    • †Plesiogulo marshalli
  • Pleurofusia
    • †Pleurofusia fresnoensis
    • †Pleurofusia lindavistaensis – or unidentified related form
  • †Pleuroncodes
  • †Pleuronichthys
    • †Pleuronichthys veliger
  • †Pliauchenia
    • †Pliauchenia magnifontis – or unidentified comparable form
  • †Plioceros
  • †Pliocyon
    • †Pliocyon medius
  • Fossilized skull of the Miocene horse Pliohippus
    †Pliohippus
    • †Pliohippus coalingensis – type locality for species
    • †Pliohippus fairbanksi – type locality for species
    • †Pliohippus spectans – tentative report
  • †Pliometanastes
  • †Plionarctos
    • †Plionarctos edensis – type locality for species
  • †Plionictis
    • †Plionictis ogygia – or unidentified comparable form
  • Life restoration of the Miocene walrus Pliopedia
    †Pliopedia – type locality for genus
  • †Pliotaxidea
    • †Pliotaxidea garberi – type locality for species
  • †Pliotomodon
    • †Pliotomodon primitivus – type locality for species
  • †Plithocyon
    • †Plithocyon barstowensis
  • †Plotopterum – type locality for genus
    • †Plotopterum joaquinensis – type locality for species
  • Pluvialis
  • Pneumatophorus
    • †Pneumatophorus grex – or unidentified comparable form
  • †Poabromylus – tentative report
    • †Poabromylus robustus
  • Living Pocillopora, or cauliflower coral
    Pocillopora
  • Podiceps
  • Podilymbus
  • Pododesmus
  • †Poebrodon
  • Illustration of a fossilized skull of the Oligocene false faber-toothed cat Pogonodon
    †Pogonodon
    • †Pogonodon brachyops
  • Polinices
    • †Polinices – type locality for species informal
    • †Polinices draconis
    • †Polinices horni – or unidentified comparable form
    • †Polinices hornii
    • †Polinices lewisii
    • †Polinices pinyonensis – or unidentified comparable form
    • †Polinices recluzianys
    • †Polinices rectus – or unidentified related form
    • †Polinices susanaensis
    • †Polinices uber
    • †Polinices washingtonensis – or unidentified comparable form
  • Polydora
  • Exterior of the shell of a Polymesoda basket clam
    Polymesoda
    • †Polymesoda tenuis – or unidentified comparable form
  • Polystira
    • †Polystira barretti
  • †Pongamia
    • †Pongamia ovata – type locality for species
  • †Pontolis – or unidentified comparable form
  • Populus
    • †Populus alexanderii
    • †Populus bonhamii
    • †Populus coalingensis
    • †Populus garberii
  • Porichthys
  • Porites
    • †Porites carrizensis – type locality for species
  • †Portunites
    • †Portunites insculpta
  • †Potamides
    • †Potamides carbonica – or unidentified comparable form
    • †Potamides sespeensis
  • †Praemancalla – type locality for genus
    • †Praemancalla lagunensis – type locality for species
  • †Presbychen – type locality for genus
    • †Presbychen abavus – type locality for species
  • †Presbymys
    • †Presbymys lophatus – type locality for species
  • Priene
    • †Priene amoldi
    • †Priene oregonensis
    • †Priene scotiaensis
  • Prionace
  • †Priscoficus
    • †Priscoficus caudata
  • †Priscofusus
    • †Priscofusus carlsoni – tentative report
    • †Priscofusus hecoxi
    • †Priscofusus lincolnensis
    • †Priscofusus robustus
  • †Pristichampsus
  • Pristiophorus
  • †Pristophorus
  • †Proboscipeda
  • †Procamelus
  • †Procymophyes – type locality for genus
    • †Procymophyes lithax – type locality for species
  • †Procynodictis
    • †Procynodictis progressus
  • Procyon
  • †Prodipodomys
    • †Prodipodomys idahoensis
    • †Prodipodomys riversidensis – type locality for species
    • †Prodipodomys timoteoensis – type locality for species
  • †Prodipoides
    • †Prodipoides lecontei – type locality for species
  • Progabbia
  • †Proharrymys – or unidentified comparable form
  • †Proheteromys
    • †Proheteromys maximus
    • †Proheteromys sulculus
  • †Promartes
  • †Pronotolagus
    • †Pronotolagus apachensis – or unidentified comparable form
  • †Protadjidaumo
  • †Protanthias – type locality for genus
    • †Protanthias fossilis – type locality for species
  • †Protepicyon
    • †Protepicyon raki – type locality for species
  • †Proterixoides
    • †Proterixoides davisi – type locality for species
  • †Prothomomys
    • †Prothomomys warrenensis – type locality for species
  • Life restoration of the Eocene brontothere mammal Protitanops
    †Protitanops
    • †Protitanops curryi – type locality for species
  • †Protoarrenurus
    • †Protoarrenurus convergens – type locality for species
  • †Protochlorotettix – type locality for genus
    • †Protochlorotettix calico – type locality for species
  • †Protohepialus – type locality for genus
  • †Protolabis
    • †Protolabis barstowensis – type locality for species
  • †Protomarctus
    • †Protomarctus optatus
  • †Protoreodon
    • †Protoreodon pacificus – type locality for species
    • †Protoreodon parvus – or unidentified comparable form
    • †Protoreodon pumilus
    • †Protoreodon transmontanus
    • †Protoreodon walshi
  • †Protosciurus
    • †Protosciurus tecuyensis
  • †Protosegestes – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Protosegestes lloydi – type locality for species
  • †Protospermophilus
    • †Protospermophilus quatalensis – type locality for species
  • †Protostrix
    • †Protostrix californiensis – type locality for species
  • †Protosurcula – tentative report
  • Protothaca
    • †Protothaca staleyi
  • †Protothore – type locality for genus
    • †Protothore explicata – type locality for species
  • Illustration of a fossilized skull of the Eocene camel Protylopus
    †Protylopus
    • †Protylopus pearsonensis – type locality for species
    • †Protylopus petersoni – or unidentified comparable form
    • †Protylopus robustus – type locality for species
    • †Protylopus stocki – type locality for species
  • Proximitra – tentative report
    • †Proximitra cretacea
  • Prunus
    • †Prunus turlockensis
  • Psammacoma
    • †Psammacoma acolasta
    • †Psammacoma arctata
    • †Psammacoma yoldiformis
  • Psammotreta
    • †Psammotreta dombei
    • †Psammotreta obesa
    • †Psammotreta rostellata
    • †Psammotreta viridotincta
  • Hypothetical restoration of the Oligocene-Pliocene sea turtle Psephophorus
    †Psephophorus
    • †Psephophorus calvertensis – or unidentified comparable form
  • †Pseudaelurus
    • †Pseudaelurus intrepidus
    • †Pseudaelurus marshi
  • †Pseudoblastomeryx
    • †Pseudoblastomeryx advena
  • Pseudochama
    • †Pseudochama exogyra
  • †Pseudoglandulina
    • †Pseudoglandulina conica
    • †Pseudoglandulina ovata
    • †Pseudoglandulina turbinata
  • Pseudoliva
    • †Pseudoliva dilleri
    • †Pseudoliva inornata – or unidentified comparable form
  • A living Pseudomelatoma sea snail
    Pseudomelatoma
  • †Pseudoparablastomeryx
    • †Pseudoparablastomeryx scotti – or unidentified comparable form
  • †Pseudoparella
  • †Pseudoperrisolax
    • †Pseudoperrisolax blakei
  • †Pseudoseriola – type locality for genus
    • †Pseudoseriola gillilandi – type locality for species
  • †Pseudotheridomys
    • †Pseudotheridomys cuyamensis – type locality for species
  • †Pseudotomus
    • †Pseudotomus californicus
    • †Pseudotomus littoralis – type locality for species
  • Living Pseudotsuga, or Douglas firs
    †Pseudotsuga
    • †Pseudotsuga sonomensis
  • Pteria
    • †Pteria berryi
    • †Pteria hertleini
    • †Pteria pellucida
  • †Pteroplatea
    • †Pteroplatea lapislutosa – type locality for species
  • Pteropurpura
  • Pterostichus
  • Pterynotus
    • †Pterynotus petri
    • †Pterynotus washingtonicus
  • Illustration of a fossilized skull of the Paleocene multituberculate mammal Ptilodus
    †Ptilodus
  • Ptinus
    • †Ptinus priminidi – type locality for species
  • Ptychoramphus
  • Puffinus
    • †Puffinus barnesi – type locality for species
    • †Puffinus calhouni – type locality for species
    • †Puffinus diatomicus – type locality for species
    • †Puffinus felthami – type locality for species
    • †Puffinus gilmorei – type locality for species
    • †Puffinus gresus
    • †Puffinus grisesus
    • †Puffinus griseus
    • †Puffinus inceptor – type locality for species
    • †Puffinus kanakoffi
    • †Puffinus mitchelli – type locality for species
    • †Puffinus opisthomelas
    • †Puffinus priscus – type locality for species
    • †Puffinus tenuirostris
  • Pullenia
    • †Pullenia eocenica
    • †Pullenia quinqueloba
  • A living Puma
    †Puma
  • Puncturella
  • Pupillaria
    • †Pupillaria optabilis
    • †Pupillaria pupilla
  • Purpura
    • †Purpura barbarensis
    • †Purpura festiva
    • †Purpura lima
    • †Purpura lurida
    • †Purpura milicentana – type locality for species
    • †Purpura nuttallii
    • †Purpura poulsoni
    • †Purpura topangensis
  • Shell of a Pusula false cowrie sea snail
    Pusula
    • †Pusula californiana
    • †Pusula solandri
  • Pycnodonte
    • †Pycnodonte eldridgei
    • †Pycnodonte heermanni
    • †Pycnodonte pacifica – or unidentified comparable form
    • †Pycnodonte stewarti – or unidentified related form
  • Pyramidella
    • †Pyramidella adamsi – or unidentified comparable form
    • †Pyramidella mucronis
    • †Pyramidella preblei
  • Pyrene
    • †Pyrene carinata

Q

  • †Quercophyllum
    • †Quercophyllum platanoides – type locality for species
  • A living Quercus, or oak tree
    Quercus
    • †Quercus acorns
    • †Quercus coalingensis
    • †Quercus dispersa
    • †Quercus distincta
    • †Quercus domenginensis
    • †Quercus douglasoides
    • †Quercus eoxalapensis – type locality for species
    • †Quercus hannibali
    • †Quercus hannibalii
    • †Quercus lakevillensis
    • †Quercus merriami
    • †Quercus nevadensis
    • †Quercus pasadorii – type locality for species
    • †Quercus pliopalmerii
    • †Quercus pollardiana
    • †Quercus pseudolyrata
    • †Quercus remingtonii
    • †Quercus sayana
    • †Quercus simulata
    • †Quercus temblorensis
    • †Quercus wislizenoides

R

  • Raja
  • †Rakomeryx
    • †Rakomeryx sinclairi – type locality for species
  • Rallus
  • Life restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx. Robert Bruce Horsfall (1913).
    †Ramoceros
    • †Ramoceros brevicornis – type locality for species
  • †Rana
  • †Ranellina
    • †Ranellina pilsbry – or unidentified related form
  • Raninoides
    • †Raninoides slaki – type locality for species
  • †Rapamys
    • †Rapamys fricki – type locality for species
  • Rapana
    • †Rapana vaquerosensis
  • †Rectoguembelina
    • †Rectoguembelina trinitatensis – or unidentified comparable form
  • A living Recurvirostra, or avocet
    Recurvirostra
  • Reithrodontomys
  • †Reithroparamys – or unidentified comparable form
  • Reophax
    • †Reophax pilulifer – or unidentified comparable form
  • †Repomys
    • †Repomys gustelyi – type locality for species
    • †Repomys maxumi – type locality for species
  • Reticulitermes
    • †Reticulitermes laurae – type locality for species
    • †Reticulitermes tibalis
  • Reticutriton
    • †Reticutriton elsmerensis
  • †Retipirula
    • †Retipirula crassitesta
  • A living Retusa barrel bubble sea snail
    Retusa
    • †Retusa carinata
    • †Retusa culcitella
    • †Retusa harpa
    • †Retusa tantilla
  • †Reynoldsomys
    • †Reynoldsomys timoteoensis – type locality for species
  • †Rhabdammina
    • †Rhabdammina eocenica
  • †Rhamnidium
    • †Rhamnidium chaneyi
  • †Rhamnus
    • †Rhamnus calyptus
    • †Rhamnus moragensis
    • †Rhamnus plenus
    • †Rhamnus precalifornica
  • †Rhomarchus – type locality for genus
    • †Rhomarchus ensiger – type locality for species
  • †Rhomurus
    • †Rhomurus fulcratus
  • Rhus
    • †Rhus diablana
    • †Rhus mixta
  • Restoration of the Miocene-Pliocene elephant relative Rhynchotherium
    †Rhynchotherium
    • †Rhynchotherium falconeri
  • †Rhynconella – tentative report
  • †Rhyssomatus
    • †Rhyssomatus miocenae – type locality for species
  • †Rhythmias
    • †Rhythmias gaviotae – type locality for species
    • †Rhythmias slarri
  • Rimella
    • †Rimella macilentus
    • †Rimella supraplicata
    • †Rimella supraplicatus
  • Rissa
  • Rissoina
    • †Rissoina pleistocena
  • Flowers of a living Robinia
    †Robinia
    • †Robinia californica
  • Robulus
    • †Robulus alatolimbatus
    • †Robulus arcuatostriatus
    • †Robulus clericii
    • †Robulus clypeiformis – or unidentified comparable form
    • †Robulus inornatus
    • †Robulus insuetus
    • †Robulus kincaidi
    • †Robulus mayi
    • †Robulus mexicanus
    • †Robulus nikobarensis
    • †Robulus propinquus
    • †Robulus simplex
    • †Robulus terryi – or unidentified comparable form
    • †Robulus warmani
    • †Robulus welchi
  • †Rogenio
    • †Rogenio bowersi
    • †Rogenio solitudinis
    • †Rogenio vanclevei – type locality for species
  • †Rotularia
    • †Rotularia tejonense
  • †Russellagus

S

  • Living Sabal, or palmettos
    Sabal
    • †Sabal miocenica
  • †Sabalites
    • †Sabalites californicus
  • Saccella
    • †Saccella alaeformis
    • †Saccella gabbi
    • †Saccella taphria
  • Sagmatias
  • †Sainguinolaria
    • †Sainguinolaria toulai – or unidentified comparable form
  • Salix
    • †Salix boisiensis
    • †Salix edenensis
    • †Salix hesperia
    • †Salix ionensis
    • †Salix laevigatoides
    • †Salix pelviga
    • †Salix storeyana
    • †Salix wildcatensis
  • †Salumiphocaena
    • †Salumiphocaena stocktoni – type locality for species
  • Fossilized skeleton of the Eocene monitor lizard Saniwa
    †Saniwa
  • †Sapindus
    • †Sapindus oklahomensis
  • Saracenaria – tentative report
    • †Saracenaria acutiauricularis – or unidentified comparable form
  • †Sarda
    • †Sarda stockii – type locality for species
  • Sassia
    • †Sassia bilineata
  • Saxidomus
  • †Saxolucina
  • Fossilized teeth of the Neogene sperm whale Scaldicetus
    †Scaldicetus
    • †Scaldicetus grandis – or unidentified comparable form
  • †Scalopoides
  • Scapanus
    • †Scapanus latimanus
    • †Scapanus malatinus
    • †Scapanus shultzi – type locality for species
  • Scaphander
    • †Scaphander costatus
    • †Scaphander jugularis
  • Scapharca
    • †Scapharca obispoana
  • Scaphinotus
  • Fossilized jaw and teeth of the Miocene horse Scaphohippus
    †Scaphohippus
    • †Scaphohippus intermontanus – type locality for species
    • †Scaphohippus sumani – type locality for species
  • Sceloporus
  • †Scenopagus
    • †Scenopagus curtidens
    • †Scenopagus priscus – or unidentified comparable form
  • †Schaubeumys
  • †Schedocardia – tentative report
  • †Schistomerus – type locality for genus
  • Schizaster
    • †Schizaster diabloensis
    • †Schizaster lecontei
    • †Schizaster martinezensis
  • †Schizodontomys
  • †Sciuravus
    • †Sciuravus powayensis
  • Sciurus
  • Scomber
    • †Scomber sanctaemonicae
  • †Scomberesox
    • †Scomberesox acutillus – type locality for species
    • †Scomberesox edwardsi – type locality for species
  • Illustration of a living Scopelogadus ridgehead
    Scopelogadus
    • †Scopelogadus mizolepis
  • †Scutella
    • †Scutella fairbanksi
    • †Scutella fairbanski
    • †Scutella merriami
    • †Scutella norrisi
    • †Scutella vaquerosensis
  • †Scutellaster
  • Group of living Scyliorhinus catsharks
    Scyliorhinus
  • †Scymnorhinus
    • †Scymnorhinus occidentalis
  • Searlesia
  • †Sebastavus – type locality for genus
    • †Sebastavus vertebralis – type locality for species
  • †Sebastodes
    • †Sebastodes apostates
    • †Sebastodes haroldi – type locality for species
    • †Sebastodes ineziae
    • †Sebastodes porteousi
    • †Sebastodes porteus
    • †Sebastodes rosae
  • Seila
    • †Seila montereyensis
  • Semelangulus
    • †Semelangulus tenuilirata
  • Semele – tentative report
  • Semele
    • †Semele decisa
    • †Semele diabloi
    • †Semele morani
    • †Semele packardi
    • †Semele pulchra
    • †Semele rubropicta
    • †Semele venusta
  • Semicassis
    • †Semicassis louella – type locality for species
    • †Semicassis tuberculiformis
  • Semicossyphus
  • †Semirostrum – type locality for genus
  • Septifer
    • †Septifer bifurcatus
  • A living Sequoiadendron
    †Sequoiadendron
  • †Serbelodon
    • †Serbelodon burnhami
  • Serica
    • †Serica kanakoffi – type locality for species
  • Seriola
    • †Seriola sanctaebarbarae
  • Seriphus
  • Serpula
    • †Serpula coreyi
  • Serpulorbis
    • †Serpulorbis llajasensis
  • †Sespedectes
    • †Sespedectes singularis – type locality for species
    • †Sespedectes stocki
  • †Sespemys
    • †Sespemys thurstoni – type locality for species
  • Life restoration of two species of the Oligocene oreodont mammal genus Sespia
    †Sespia
    • †Sespia californica – type locality for species
    • †Sespia nitida
  • Siderastrea
    • †Siderastrea clarki – type locality for species
    • †Siderastrea mendenhalli – type locality for species
  • Sigmodon
    • †Sigmodon lindsayi
    • †Sigmodon minor
  • Sigmoilina – tentative report
  • Siliqua
    • †Siliqua lucida
    • †Siliqua media – or unidentified comparable form
    • †Siliqua patula – or unidentified related form
  • †Simiacritomys
    • †Simiacritomys whistleri – type locality for species
  • †Simidectes
    • †Simidectes medius – or unidentified comparable form
    • †Simidectes merriami – type locality for species
  • †Simimeryx
    • †Simimeryx hudsoni – type locality for species
  • †Simimys
    • †Simimys landeri – type locality for species
    • †Simimys simplex
  • Simomactra
    • †Simomactra dolabriformis
    • †Simomactra falcata
    • †Simomactra planulata
  • †Sinomactra
    • †Sinomactra falcata
  • Several views of the shell of a Sinum moon snail
    Sinum
    • †Sinum debile – or unidentified comparable form
    • †Sinum obliquum
    • †Sinum scopulosum
  • Siphonalia
    • †Siphonalia andersoni
    • †Siphonalia lineata
    • †Siphonalia merriami
    • †Siphonalia sutterensis – or unidentified comparable form
  • Skenea
  • †Smilax
    • †Smilax diforma
    • †Smilax labidurommae
    • †Smilax magna – or unidentified comparable form
    • †Smilax remingtonii
  • Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
    †Smilodon
  • †Smilodonichthyes
    • †Smilodonichthyes rastrosus
  • †Smilodonichthys
  • †Smilodonicthyes
    • †Smilodonicthyes rastrosus
  • †Smithites – type locality for genus
    • †Smithites elegans – type locality for species
  • Solariella
    • †Solariella hartleyensis – type locality for species
    • †Solariella peramabilis
    • †Solariella walkeri – type locality for species
  • Modern specimen of the marine bivalve Solemya
    Solemya
    • †Solemya ventricosa
  • Solen
    • †Solen curtis – or unidentified comparable form
    • †Solen rosaceus
    • †Solen sicarius
  • Solena
    • †Solena conradi
    • †Solena gravidus
    • †Solena lorenzana
    • †Solena parallelus – or unidentified comparable form
    • †Solena perrini
    • †Solena stantoni
    • †Solena subverticala
  • Solenastrea
    • †Solenastrea fairbanksi
  • Solenosteira
    • †Solenosteira anomala
  • A living Sorex, or long-tailed shrew
    Sorex
    • †Sorex leahyi
  • Spathipora
  • Spermophilus
  • †Sphaeroidina
    • †Sphaeroidina gredalensis
  • Sphenia – tentative report
    • †Sphenia meganosensis – type locality for species
  • †Sphenophalos – tentative report
  • A living Sphyrna hammerhead shark
    Sphyrna
    • †Sphyrna aus
    • †Sphyrna bus
  • Spilogale
  • †Spirocrypta
    • †Spirocrypta inornata
    • †Spirocrypta pileum
  • Spiroglyphus
    • †Spiroglyphus lituella
    • †Spiroglyphus tinajasensis
  • Spiroloculina
    • †Spiroloculina lamposa
  • Spiroplectammina
    • †Spiroplectammina coreyi – type locality for species
    • †Spiroplectammina eocenica
    • †Spiroplectammina kewi – type locality for species
  • Spirotropis
    • †Spirotropis bulimoides
    • †Spirotropis perversa
  • Shell of a Spisula, or surf clam
    Spisula
    • †Spisula coosensis
    • †Spisula densatum – type locality for species
    • †Spisula meganosensis – type locality for species
    • †Spisula pabloensis
    • †Spisula packardi
    • †Spisula panzanum
  • Spondylus
    • †Spondylus bostrychites
    • †Spondylus calcifer
    • †Spondylus carlosensis
    • †Spondylus perrini
    • †Spondylus vaquerosensis
  • A living Squalus, or spurdog
    Squalus
    • †Squalus sericulus
    • †Squalus serriculus
  • Squatina
    • †Squatina californica – or unidentified comparable form
    • †Squatina claifornica
    • †Squatina lerichei
  • Squilla
    • †Squilla laingae
  • †Starrias – type locality for genus
    • †Starrias ischyrus – type locality for species
  • Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon
    †Stegomastodon
  • Stenella
  • †Stenomylus
  • Stenoplax
  • Stephanodiscus
    • †Stephanodiscus asteroides
    • †Stephanodiscus carconensis
    • †Stephanodiscus excentricus
    • †Stephanodiscus hantzchii
    • †Stephanodiscus hantzschii
  • †Stephanophyllia
    • †Stephanophyllia californica – type locality for species
    • †Stephanophyllia vacavillensis
  • Stercorarius
  • Sterna
    • †Sterna neglecta
  • †Sternbergia – type locality for genus
    • †Sternbergia waitei – type locality for species
  • Sthenictis
  • †Stichocassidulina
    • †Stichocassidulina thalmanni
  • †Stictocarbo
    • †Stictocarbo kumeyaay – type locality for species
  • †Stockia – type locality for genus
    • †Stockia powayensis – type locality for species
  • Mounted fossilized skeleton of the fossil pronghorn Stockoceros
    †Stockoceros – or unidentified comparable form
  • Stomias
  • Stramonita
  • †Strepsidura
    • †Strepsidura diabloensis – type locality for species
    • †Strepsidura ficus – tentative report
    • †Strepsidura lincolnensis
  • †Streptochetus
    • †Streptochetus californiana – type locality for species
  • Fossilized teeth of the Paleocene-Miocene sandshark Striatolamia
    †Striatolamia
    • †Striatolamia macrota
  • †Striostrea
    • †Striostrea freudenbergi
  • Strioterebrum
    • †Strioterebrum gausapatum
  • †Strobilites
    • †Strobilites temblorensis
  • Strombiformis
    • †Strombiformis raymondi
  • Strombus
  • †Strongyliscus – type locality for genus
    • †Strongyliscus robustus – type locality for species
  • Strongylocentrotus
  • †Strongylodon
    • †Strongylodon falcata
  • Strophocardia
    • †Strophocardia megastropha
  • Sturnella
    • †Sturnella negecta
  • †Stylemys
    • †Stylemys neglectus – type locality for species
  • Subcancilla
  • Life restoration of the Eocene-Oligocene cow-sized rhinoceros Subhyracodon. Charles R. Knight (1890s).
    †Subhyracodon
    • †Subhyracodon kewi
  • Succinea
  • †Suggrunda
  • Sula
    • †Sula clarki – type locality for species
    • †Sula pohli – type locality for species
    • †Sula willetti – type locality for species
  • †Sulcocypraea
    • †Sulcocypraea moumieti
  • Sulcoretusa
    • †Sulcoretusa xystrum
  • Surculites
    • †Surculites aequilateralis
    • †Surculites carpentaria
    • †Surculites carpenteriana
    • †Surculites carpenterianus
    • †Surculites isoformis
    • †Surculites keepi – or unidentified comparable form
    • †Surculites mathewsoni
    • †Surculites mathewsonii
    • †Surculites remondi
    • †Surculites remondii
  • †Surculities – tentative report
  • †Syllomus – or unidentified comparable form
  • Sylvilagus
  • Syncera
    • †Syncera translucens
  • A living Syngnathus pipefish
    Syngnathus
    • †Syngnathus avus – type locality for species
  • †Synthiboramphus
    • †Synthiboramphus antiquus
  • Synthliboramphus
  • †Synthliboraramphus
    • †Synthliboraramphus antiquus

T

U

V

  • †Valenictus – type locality for genus
  • Valvulineria
    • †Valvulineria californica
    • †Valvulineria casitasensis
    • †Valvulineria tumeyensis
    • †Valvulineria wilcoxensis – or unidentified comparable form
  • †Vanderhoofius
    • †Vanderhoofius coalingensis
  • †Vaquerosella
    • †Vaquerosella andersoni
    • †Vaquerosella coreyi
    • †Vaquerosella durhami
    • †Vaquerosella fairbanksi
    • †Vaquerosella merriami
    • †Vaquerosella vaquerosensis
  • Vasum
    • †Vasum caestum
  • †Vauquelinia
    • †Vauquelinia exigua – type locality for species
  • Fossilized shell of the Paleocene-Miocene nerite sea snail Velates
    †Velates
    • †Velates californicus – type locality for species
    • †Velates perversus
  • Velutina
  • Venericardia
    • †Venericardia hornii
    • †Venericardia mulleri
    • †Venericardia planicosta
    • †Venericardia sandiegoensis
  • Venus
    • †Venus purpurissata
  • Vermicularia
    • †Vermicularia ebunea
  • Veromessor
    • †Veromessor andrei
  • †Vertipecten
    • †Vertipecten alexclarki – type locality for species
    • †Vertipecten nevadanus
    • †Vertipecten perrini
    • †Vertipecten yneziana – or unidentified related form
  • †Viburnum
    • †Viburnum variabilis
  • A living Vireo
    †Vireo
  • †Virgulina
    • †Virgulina bramlettei
    • †Virgulina bramlettrei
    • †Virgulina dibollensis
  • Vitrinella – tentative report
  • Volsella
    • †Volsella merriami
    • †Volsella porterensis – or unidentified comparable form
  • A living Voluta sea snail
    Voluta
  • †Volutilithes
    • †Volutilithes orocopiaensis – type locality for species
  • Volutopsius
    • †Volutopsius eurekaensis
  • Volvulella
    • †Volvulella cylindrica
  • †Vouapa
    • †Vouapa geminifolia – type locality for species
  • Vulpes
  • Vulvulina
    • †Vulvulina curta

W

  • †Washakius
    • †Washakius woodringi – type locality for species
  • †Whitneyella
    • †Whitneyella sinuata
  • Williamia
    • †Williamia peltoides
  • Restoration of the Permian shark Wodnika
    †Wodnika
  • †Woodburnehyus – type locality for genus
    • †Woodburnehyus grenaderae – type locality for species

X

  • Fossilized shell of the Late Cretaceous-modern carrier shell sea snail Xenophora
    Xenophora
    • †Xenophora stocki
    • †Xenophora zitteli
  • †Xenothrissa – type locality for genus
    • †Xenothrissa aphrasta – type locality for species
  • †Xyne – type locality for genus
    • †Xyne grex – type locality for species
  • †Xyrinius – type locality for genus
    • †Xyrinius houshi – type locality for species

Y

  • †Yaquius
    • †Yaquius travisi
  • †Yatkolamys
  • Yoldia
    • †Yoldia cooperii
    • †Yoldia impressa
    • †Yoldia mortuasusensis – type locality for species
    • †Yoldia packardi – or unidentified comparable form
    • †Yoldia scissurata
    • †Yoldia tenuissima
  • †Yumaceras – tentative report
    • †Yumaceras ruminalis – type locality for species

Z

References

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