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

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

• †Advenella
• †Agathiceras
• †Ampyx – tentative report
• †Ampyx
• †Apatolichas

• 

  †Aspidella – tentative report
  • †Aspidella terranovica
• †Atrypa
  • †Atrypa reticularis
• †Aviculopecten
  • †Aviculopecten occidentalis – or unidentified comparable form
• †Bimuria
• †Bolbolenellus
• †Bristolia
• †Bumastus
• †Calymene
• †Camarotoechia – tentative report
• †Carolinites
• †Chonetes
• †Cleiothyridina
• †Composita
  • †Composita grandis – or unidentified comparable form
  • †Composita subtilita – or unidentified comparable form
• †Conchidium
• †Conocardium

• 

  †Cruziana
• †Cyclolobus
• †Cyclonema
• †Cymbidium
• †Daguinaspis
• †Dicoelosia
• †Didymograptus
• †Dimeropygiella
• †Diplichnites
• †Encrinurus
• †Endoceras – tentative report
• †Euomphalus
• †Fallotaspis
• †Favosites
• †Fenestella
• †Gogia
• †Halysites
• †Helicoplacus

• 

  †Helicoprion
  • †Helicoprion davisii
• †Heliomeroides
• †Hercynella
• †Holopea
• †Hyolithes
• †Illaenus
• †Ingria
• †Isogramma
• †Isotelus
• †Kawina

• 

  †Kutorgina
• †Lingula
• †Lingulella
• †Lithostrotion
  • †Lithostrotion pauciradiale
• †Lonchodomas
• †Meristella
• †Micromitra
• †Murchisonia
• †Neospirifer
• †Nephrolenellus
• †Nevadella
• †Obolella

• 

  †Olenellus
  • †Olenellus fowleri – or unidentified comparable form
• †Oryctocephalus
  • †Oryctocephalus indicus
• †Paladin
• Palaeoaplysina
• †Paleochiton
• †Parafusulina
• †Paraschwagerina
• †Peachella

• 

  †Pentamerus
• †Phillipsia
• †Phyllograptus
• †Plaesiomys
• †Planolites
• †Platyceras
• †Poleumita
• †Proetus
• †Pteridinium – tentative report
• †Raymondaspis
• †Remopleurides
• †Repinaella

• 

  †Rusophycus
• †Schwagerina
• †Skenidioides
• †Spirifer
  • †Spirifer brazerianus
• †Spiriferina – tentative report
• †Stearoceras
• †Streptosolen
• †Stylonema
• †Swartpuntia – or unidentified comparable form
• †Syringopora
• †Thompsonella
• †Trinodus
• †Trocholites – tentative report
• †Volborthella
• †Wanneria

• 

  †Xenodiscus
• †Zacanthoides

• †Abyssochrysos – tentative report
• †Acanthoceras
• Acanthosphaera – tentative report
• Acesta
• †Acrioceras
• †Acrodus
  • †Acrodus wempliae – type locality for species
• †Acteon
• †Acteonella

• 

  †Aletopelta – type locality for genus
  • †Aletopelta coombsi – type locality for species
• Amauropsis
• †Ampullina
• †Anagaudryceras
  • †Anagaudryceras sacya – or unidentified comparable form
• †Anahamulina
• †Anasibirites
  • †Anasibirites kingianus – type locality for species
• †Anatomites
• †Anatropites
• †Anisoceras

• 

  †Anomia
• †Anoplophora – tentative report
• †Aphaea
• †Aphrosaurus
  • †Aphrosaurus furlongi
• Aporrhais
• Architectonica – tentative report
• Arctica
• †Arctoceras
• Argyrotheca
• †Arnioceras
• †Arpadites
• Arrhoges
• †Aspenites – type locality for genus
• Astarte
• †Asteroceras
• †Atira

• 

  †Augustynolophus
  • †Augustynolophus morrisi
• †Axonoceras
• †Bacchites
• †Baculites
  • †Baculites capensis
  • †Baculites yokoyamai – or unidentified comparable form
• Barbatia
• †Barrettia
• †Basilemys
• † Belleza
• Bernaya
• †Beudanticeras
• †Bochianites
• †Bostrychoceras
• †Brancoceras
• Bulimulus
• Bullaria
• Bullina
• †Californites – type locality for genus

• 

  †Californosaurus
• Callianassa – tentative report
• †Calliconites
• †Calliomphalus – tentative report
• Callista – tentative report
• †Calva
• †Calycoceras
• Cancellaria – tentative report
• Cantharus
• Capulus – or unidentified comparable form
• Cardinia
• Cardita
• †Cecrops
• Cerithidea
• Cerithium
• †Cidarina

• 

  Cidaris
• †Clinura
• †Collignoniceras
• †Collonia
• Corbicula
• Corbula
• Cornutella
• †Cosmonautilus
• †Crioceratites
• Cucullaea
• †Cunningtoniceras
• †Cyclothyris
• Cylichna
• †Cylindroteuthis
• †Cymatoceras

• 

  †Cymbospondylus
  • †Cymbospondylus petrinus
• †Daonella – tentative report
  • †Daonella dubia
• †Dentalium
• †Desmoceras
• †Desmophyllites
• †Dictyoconites
• †Didymoceras
  • †Didymoceras hornbyense – or unidentified comparable form
• †Dieneria – type locality for genus
• †Discohelix – tentative report
• †Discoscaphites
• †Douvilleiceras
• †Durania
• †Echinocorys
• †Elimia

• 

  †Enchodus
• †Entobia
• †Eriphyla
• †Eucalycoceras
• †Euclastes
• †Euomphaloceras
• †Eupachydiscus
• †Euspira
• †Eutrephoceras
• †Exiteloceras
• †Exogyra

• 

  †Fagesia
• Fissurella – tentative report
• †Flabellina
• †Flabellum
• †Fresnosaurus – type locality for genus
  • †Fresnosaurus drescheri – type locality for species
• Gastrochaena – tentative report
• †Gaudryceras
• †Gervillia
• Glans – tentative report
• †Glauconia
• †Globigerinelloides
• Glossus
• Glycymeris
• †Goricanites – type locality for genus

• 

  †Grallator
• †Gryphaea
• †Gryponautilus
• Gyroidina
• Haliotis
• †Hauericeras
• †Hecticoceras
• †Hedenstroemia
• †Helena
• †Hemicidaris
• Heptranchias
• Hipponix
• †Homerites
• †Hybodus
• †Hydrotherosaurus – type locality for genus
  • †Hydrotherosaurus alexandrae – type locality for species
• †Hypophylloceras
• †Ichthyornis
• †Ichthyosaurus

• 

  †Inoceramus
  • †Inoceramus balticus
  • †Inoceramus cordiformis – or unidentified comparable form
  • †Inoceramus incertus – or unidentified comparable form
  • †Inoceramus naumanni
  • †Inoceramus steinmanni – or unidentified comparable form
  • †Inoceramus subundatus
  • †Inoceramus teshioensis – or unidentified comparable form
  • †Inoceramus turgidus – type locality for species
• †Inyoites – type locality for genus
  • †Inyoites oweni – type locality for species
• Isognomon

• 

  †Kallirhynchia
• †Kilianella
• †Kossmaticeras
• †Lacunaria
• Leda – tentative report
• Lima
• †Linearis
• †Lingula
• Lithophaga
• Lopha
• †Loxo
• †Lucina
• †Lysis
• †Lytoceras
  • †Lytoceras batesi
• Macrocallista
• †Macrocephalites
• †Mammites – tentative report
• †Mantelliceras
• Margarella
• Margarites

• 

  †Mariella
• Martesia
• †Mediaster
• †Meekoceras
  • †Meekoceras gracilitatis
• †Melchiorites
• †Menuites
• †Merriamia
• † Mita – tentative report
• † Mita
• †Modiolus
• †Morenosaurus – type locality for genus
  • †Morenosaurus stocki – type locality for species
• †Mortoniceras
• Musculus – or unidentified related form
• †Myophorella
  • †Myophorella argo
  • †Myophorella dawsoni – or unidentified related form
  • †Myophorella yellowstonensis
• †Myophoria
• †Mytilus
• Natica
• †Navahopus

• 

  †Nectosaurus
• †Neithea
• †Neocardioceras – tentative report
• †Neohibolites
• †Neophylloceras
  • †Neophylloceras hetonaiense
  • †Neophylloceras ramosum
• †Nerinea
• Nerita
• †Nolita
• †Nostoceras
  • †Nostoceras splendidum
• Nucula
• Opalia
• †Ophiceras
• †Opis
• †Orthoceras

• 

  Ostrea
• †Owenites
  • †Owenites carpenteri
  • †Owenites koeneni – type locality for species
• †Oxynautilus
• †Oxytoma
• †Pachydesmoceras
  • †Pachydesmoceras pachydiscoide – type locality for species
• †Pachydiscus
  • †Pachydiscus ootacodensis
• Panopea

• 

  †Parapuzosia
• Patella – report made of unidentified related form or using admittedly obsolete nomenclature
• †Pecten
• †Pedalion
• †Pentzia
• †Peroniceras
• Phanerolepida
• Pholadomya
• †Phylloceras
• †Phyllopachyceras
• †Pinna
• †Plesiotylosaurus
  • †Plesiotylosaurus crassidens
• Plicatula

• 

  †Plotosaurus
  • †Plotosaurus bennisoni
  • †Plotosaurus tuckeri
• Polinices
• †Polycyclus
• †Polyptychites
• †Polyptychoceras
• †Posidonia
• †Potamides – tentative report
• †Proclydonautilus
• †Prognathodon
  • †Prognathodon waiparaensis – or unidentified comparable form

• 

  Propeamussium
• †Protocardia
• †Protrachyceras
• †Pseudomelania
• †Pseudoperna
• †Pseudothurmannia – tentative report
• †Pteraichnus
• †Pterotrigonia
• †Puzosia
• Pycnodonte
• Quadrans – tentative report
• Retusa
• †Rhaetina – tentative report
• †Rhynchonella
• Rogerella
• †Romaniceras
• †Scalarites
• †Scapanorhynchus
• Scaphander
• †Scaphites
  • †Scaphites hippocrepis – or unidentified related form
• †Senis

• 

  †Sequoia
• Serpula
• †Shastasaurus
  • †Shastasaurus alexandrae
  • †Shastasaurus pacificus
• †Shastoceras
• Siphonalia
• †Sirenites
• †Skolithos
• Solariella
• Solemya – tentative report
• Solen
• †Spiriferina – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Spiriferina coreyi – type locality for species
• Spondylus
• Squalicorax
• †Sturia
• † Suna
• †Tegula
• Tellina
• †Tenea
• Terebralia – tentative report
• †Tessarolax

• 

  †Thalattosaurus
• Thyasira
• †Tollia
• †Tragodesmoceras
• †Trigonia
• †Trinacria
• †Trochactaeon
• Trophon
• †Turrilites
  • †Turrilites acutus
  • †Turrilites costatus – or unidentified comparable form
• Turritella
• Volsella
• †Worthenia
• †Wyomingites
• †Yezoites

• 

  Yoldia
• †Zanola
• †Zealandites

• †Abantis

• 

  Abies
• †Aboma
• †Acalypha
• Acanthina
  • †Acanthina spirata
• Acanthocardia
• Acar
• Accipiter
  • †Accipiter velox
• Acentrophryne
• Acer
• Acesta
• Acipenser
  • †Acipenser medirostris – or unidentified comparable form
• Acmaea
  • †Acmaea mitra

• 

  †Acritohippus
  • †Acritohippus isonesus – or unidentified comparable form
• Acteocina
• Acteon
• Actinemys
  • †Actinemys marmorata
• Admete
  • †Admete rhyssa
• Adula
• Aechmophorus
  • †Aechmophorus occidentalis
• †Aelurodon

• 

  †Aepycamelus
  • †Aepycamelus alexandrae
• Aequipecten
• Aesopus
• Aethia
• Agaronia
• Agelaius
• †Agriotherium
• †Ailanthus
• Akera
• Alaba
• Alabina
• †Albicetus
• Alca
• †Alcodes
• Aleochara
• Aletes
• †Aletomeryx
• †Alforjas
• †Alisea – type locality for genus
• †Allodelphis – type locality for genus
  • †Allodelphis pratti – type locality for species

• 

  †Allodesmus
  • †Allodesmus kernensis
• Alnus
• †Alopecocyon – type locality for genus
• Alopias
  • †Alopias vulpinus – or unidentified comparable form
• Alvania
• Amara
  • †Amara insignis
• Amauropsis
• Amelanchier
• Ammospermophilus
• †Amorpha
• †Amphicyon
  • †Amphicyon ingens

• 

  †Amphimachairodus
• Amphissa
  • †Amphissa versicolor
• Amphiura
• †Amphora
• †Ampullina
• Amusium
• Anachis
• Anadara
• Anas
  • †Anas americana
  • †Anas clypeata
  • †Anas platyrhynchos
• †Anchitheriomys – or unidentified comparable form

• 

  †Anchitherium
• Ancilla
• Angulus
• Anniella
• Anodontia
• Anomia
• †Ansen
• Anser
  • †Anser albifrons
• Antigona
• †Antilla
• Antilocapra
• Antrozous
  • †Antrozous pallidus
• Aphelocoma
  • †Aphelocoma californica

• 

  †Aphelops
• Apiotoma
• Aplodontia
  • †Aplodontia rufa
• Aquila
  • †Aquila chrysaetos
• †Araeosteus
  • †Araeosteus rothi
• Arbutus
• Arca
• †Arceuthobium
• †Archaeocyon
• †Archaeohippus
• Architectonica
• Archoplites
  • †Archoplites interruptus
• Arcinella
• Arctica – tentative report
• Arctocephalus

• 

  †Arctodus
  • †Arctodus simus – type locality for species
• †Arctostaphylos
• Ardea
  • †Ardea herodias
• Arenaria
  • †Arenaria melanocephala
• Arene
• †Argenna
• Argobuccinum
• Argopecten

  • 

    †Argopecten gibbus
  • †Argopecten purpuratus
• Argyropelecus
• †Artocarpus
• Asio
  • †Asio wilsonianus
• Astraea
  • †Astraea undosa
• Astrangia
• Astropecten
• Astyris
• Athene
  • †Athene cunicularia
• Athleta
• †Atocetus
  • †Atocetus nasalis – type locality for species
• Atrina
• †Aturia
• Atys

• 

  †Aulophyseter – type locality for genus
• Austrotrophon
• †Avipeda
• Aythya
  • †Aythya affinis
  • †Aythya valisineria
• Baiomys
• Balaenoptera
  • †Balaenoptera physalus
  • †Balaenoptera ryani

• 

  †Balaenula
• Balanophyllia
  • †Balanophyllia elegans
• Balanus
  • †Balanus crenatus
  • †Balanus nubilus – or unidentified comparable form
• Bankia
• Barbarofusus
• Barbatia

• 

  †Barbourofelis
  • †Barbourofelis whitfordi
• Barleeia
• Barnea
• †Basirepomys
• Bassariscus
  • †Bassariscus astutus – or unidentified comparable form
• †Bathylagus – type locality for genus
• Bathytoma
  • †Bathytoma pacifica
• †Batodonoides
• Bembidion
• †Benoistia
• Beringraja
  • †Beringraja binoculata – or unidentified comparable form
• Betula
• Bison
  • †Bison antiquus

  • 

    †Bison latifrons
• Bittium
  • †Bittium alternatum – or unidentified comparable form
• Bivetopsia
• †Boavus
• †Bolbocara
• Bolinichthys
• Bonasa
  • †Bonasa umbellus
• †Bonellitia
• †Borophagus
  • †Borophagus diversidens
  • †Borophagus littoralis – type locality for species
  • †Borophagus parvus
  • †Borophagus secundus
• †Borophryne
  • †Borophryne apogon
• Brachidontes

• 

  †Brachycrus
• †Brachypsalis
• Brachyramphus
• Branta
  • †Branta canadensis
  • †Branta nigricans – tentative report
• Bubo
  • †Bubo virginianus
• Buccinum
  • †Buccinum strigillatum
• Bucephala
  • †Bucephala albeola
• †Bucida
• Bufo
• Bulla
  • †Bulla gouldiana
  • †Bulla striata
• Bullia
• †Bumelia
• Bursa
• Buteo
  • †Buteo borealis

  • 

    †Buteo jamaicensis
  • †Buteo swainsoni
• Cadulus
• Caecum
• †Calicovatellus – type locality for genus
  • †Calicovatellus petrodytes – type locality for species
• Calidris
  • †Calidris alba
• Californiconus
  • †Californiconus californicus
• Calliostoma

  • 

    †Calliostoma annulatum
  • †Calliostoma canaliculatum
  • †Calliostoma gemmulatum
  • †Calliostoma ligatum
  • †Calliostoma supragranosum
  • †Calliostoma tricolor
• Callista
• Callorhinus
  • †Callorhinus ursinus
• Calosoma
  • †Calosoma semilaeve
• Calyptraea
• †Calyptranthes

• 

  †Camelops
  • †Camelops hesternus
  • †Camelops minidokae
• Campanile
• Camponotus – type locality for genus
  • †Camponotus festinatus – type locality for species
• †Canarium
• Cancellaria
  • †Cancellaria obesa
• Cancer
• Canis
  • †Canis dirus
  • †Canis edwardii
  • †Canis latrans
  • †Canis lepophagus
  • †Canis lupus
  • †Canis rufus
• Canthon
  • †Canthon praticola
  • †Canthon simplex
• †Cantius
• †Capromeryx

  • 

    †Capromeryx minor
• Caracara
  • †Caracara cheriway
  • †Caracara plancus
• Carcharhinus
• Carcharias
• Carcharodon
  • †Carcharodon carcharias
  • †Carcharodon hastalis
• Carpelimus
• †Carpocyon
• Carya
• Caryophyllia
• Cassidulina
• Castanea
• Castanopsis
• Castor
  • †Castor californicus – or unidentified comparable form
• Cathartes

  • 

    †Cathartes aura
• Catoptrophorus
  • †Catoptrophorus semipalmatus
• †Catostomus
• Ceanothus
• Cedrela
• †Celastrus
• Celtis
• Cepphus
  • †Cepphus columba
• Cercidiphyllum
• †Cercocarpus
• Cerithidea
  • †Cerithidea californica
• Cerithiopsis
• Cerithium
• †Cernina
• †Cerorhinca
• Cervus
  • †Cervus elaphus
• Cetorhinus
  • †Cetorhinus maximus

• 

  †Cetotherium
• †Chaenophryne
• Chaetodipus
  • †Chaetodipus formosus – or unidentified comparable form
• †Chalcidichthys – type locality for genus
• Chama
• †Chamaecyparis
• Charadrius
  • †Charadrius semipalmatus
• Chauliodus – type locality for genus
• Chelonia
• Chen
  • †Chen caerulescens

• 

  †Chendytes – type locality for genus
  • †Chendytes lawi – type locality for species
• Chione
  • †Chione californiensis
• Chlamys
  • †Chlamys hastata
  • †Chlamys rubida
  • †Chlamys swifti
• Chlorostoma
• †Chorizanthe
• †Chrysobalanus
• †Chrysocyon
• †Chrysodomus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Chrysolepis
• Cibicides
• Cicindela
  • †Cicindela oregona

• 

  Cidaris
• Cinnamomum
• Cissus
• †Citellus
• Citharichthys
  • †Citharichthys stigmaeus
• Clathrodrillia
• Clathurella
• Clavilithes
• Clavus
• Clementia
• Clethrionomys
• Cletocamptus

• 

  Clinocardium
  • †Clinocardium nuttallii
• Cliona
• Clupea
• Clypeaster
• Cnemidophorus
• †Cocconeis
• Cochliomyia – type locality for genus
  • †Cochliomyia macellaria – type locality for species
• Codakia
• Colaptes
• †Colodon
• Coluber
  • †Coluber constrictor
• Colubraria
• Columba – or unidentified comparable form
  • †Columba fasciata
• Columbarium
• †Conasprelloides
• Concavus

• 

  Conus
  • †Conus fergusoni
  • †Conus regularis
  • †Conus scalaris
• †Cophocetus – tentative report
• Copris
• Coragyps
• Corbicula
• Corbula
• †Cormohipparion
• Cornus
• Coronula – tentative report
• Corvus
  • †Corvus brachyrhynchos
  • †Corvus corax
• †Cosoryx

• 

  †Cranioceras
• Crassadoma
  • †Crassadoma gigantea
• Crassispira
  • †Crassispira montereyensis – or unidentified related form
• Crassostrea
  • †Crassostrea ashleyi
  • †Crassostrea titan
• Crataegus
• Crawfordina
• Crepidula
  • †Crepidula adunca
  • †Crepidula onyx
• Crepipatella
  • †Crepipatella lingulata
• †Crommium
• Crossata
  • †Crossata ventricosa
• Crotalus

  • 

    †Crotalus viridis
• Crucibulum
  • †Crucibulum spinosum
• †Cryptocarya
• Cryptonatica
  • †Cryptonatica affinis
• Cryptotermes
• Cryptotis
• Cucullaea
• Culicoides
• Cumingia
• †Cupania
• †Cupressus
  • †Cupressus goveniana
• Cuspidaria
• †Cuyamacamelus
• Cyanocitta
  • †Cyanocitta stelleri
• Cybocephalus
  • †Cybocephalus californicus – or unidentified comparable form
• Cyclammina
• Cyclocardia

• 

  Cyclothone
• Cygnus
  • †Cygnus columbianus
• Cylichna
• Cymatium
• Cymatogaster
  • †Cymatogaster aggregata
• †Cynarctoides
  • †Cynarctoides acridens
• †Cynarctus

• 

  †Cynelos
• Cynoscion
• Cyperus
• Cypraea
• Cyrtonyx
• Cystiscus
• Cythara
• Cytherea
• †Dalbergia
• †Daphoenodon – or unidentified comparable form

• 

  †Daphoenus
  • †Daphoenus ruber – type locality for species
• Dardanus
  • †Dardanus arrosor
• Dasyatis
• Dasyhelea
• †Decapterus
• Deltochilum – tentative report
• Dendragapus
  • †Dendragapus fuliginosus
  • †Dendragapus obscurus
• Dendraster

  • 

    †Dendraster excentricus
• Dendrophyllia
• Dendryphantes
• Dentalium
  • †Dentalium neohexagonum
• Dermochelys – or unidentified related form
• Deroceras
• †Desmatippus
• †Desmatochoerus
• †Desmocyon
• †Desmodium

• 

  †Desmostylus
  • †Desmostylus hesperus – type locality for species
• Diacria
• †Diceratherium
• Dichocoenia
• †Dinohippus
• †Dinohyus
  • †Dinohyus hollandi
• Diodora
  • †Diodora arnoldi
  • †Diodora aspera
  • †Diodora inaequalis
• Diomedea
• †Diospyros
• Diploria
• Dipodomys
  • †Dipodomys agilis – or unidentified comparable form
  • †Dipodomys compactus
  • †Dipodomys deserti – or unidentified comparable form
  • †Dipodomys heermanni – or unidentified comparable form

  • 

    †Dipodomys merriami
  • †Dipodomys ordii
• †Dipoides
• †Diprionomys
• Discinisca
• †Discohelix
• †Dissacus
• Distorsio
• †Domnina
• Donax
  • †Donax gouldii
• Dosinia
  • †Dosinia dunkeri
• †Drimys – type locality for genus
• †Dromomeryx

• 

  †Duchesneodus
• †Dusisiren
• Dytiscus
• Echinarachnius
• Echinorhinus
• Eclipes – type locality for genus
• †Ectasis – type locality for genus
• †Ectopistes
  • †Ectopistes migratorius
• Eleodes
  • †Eleodes osculans – type locality for species
• Elgaria
  • †Elgaria multicarinata

• 

  †Elomeryx
• †Enaliarctos
  • †Enaliarctos mealsi
  • †Enaliarctos mitchelli
• †Enallagma – type locality for genus
• Engelhardtia
• Engina
• Enhydra
  • †Enhydra lutris
  • †Enhydritherium terraenovae
• Ensis
• Entomobrya
• †Eomellivora

• 

  †Eopelobates
• †Eosurcula
• †Epicyon
  • †Epicyon haydeni
• †Epihippus
• Epinephelus
• †Epiphragmophora
• Epitonium
• Eptesicus
  • †Eptesicus fuscus – or unidentified comparable form
• †Equisetum
• Equus
  • †Equus idahoensi

  • 

    †Equus scotti
  • †Equus simplicidens
• Eremophila
  • †Eremophila alpestris
• Erethizon
  • †Erethizon dorsatum
• †Eriquius
• Eschrichtius
  • †Eschrichtius robustus – or unidentified comparable form
• †Etringus
• Eubalaena – or unidentified comparable form
• †Eucastor

• 

  †Euceratherium – type locality for genus
  • †Euceratherium collinum – type locality for species
• †Eucyon
  • †Eucyon davisi
• Euleptorhamphus
• Eumetopias
• †Euoplocyon
• Euphagus
  • †Euphagus cyanocephalus
• Euscelis
• Eusmilia
• Euspira
  • †Euspira lewisii
• Eutamias
• †Eutrephoceras
• Euvola
• †Evesthes
• †Exilia
• Falco

  • 

    †Falco peregrinus
  • †Falco sparverius
• Felis
• †Ficopsis
• Ficus
• Fimbria
• Fissurella
  • †Fissurella volcano
• Flabellipecten
• Flabellum
• †Forestiera
• Forreria
  • †Forreria belcheri
• †Fragilaria
• Fratercula

  • 

    †Fratercula cirrhata
  • †Fratercula dowi – type locality for species
• †Fraxinus
• Fulgoraria
• †Fulica
  • †Fulica americana
• Fulmarus
  • †Fulmarus glacialis
• Fusinus
  • †Fusinus barbarensis
  • †Fusinus luteopictus

• 

  Galeocerdo
  • †Galeocerdo aduncus
• Galeodea
• Galeorhinus
• †Ganolytes
• Gari
• Gasterosteus
  • †Gasterosteus aculeatus
• Gastrochaena
• Gavia
  • †Gavia arctica

  • 

    †Gavia immer
  • †Gavia pacifica
  • †Gavia stellata
• Gemmula
• Genota
• Genyonemus
  • †Genyonemus lineatus
• Geochelone
• †Geococcyx

  • 

    †Geococcyx californianus
• Geomys
• Geranoaetus
• Gerrhonotus
• †Gila – tentative report
• †Gilbertia
• Glans
• Glaucidium
  • †Glaucidium gnoma
• Glebocarcinus
• Globigerina
  • †Globigerina bulloides
• Globularia
• Glossus
• Glycimeris
• Glycymeris
• Glyptoactis
• Glyptostrobus

• 

  †Gomphotaria – type locality for genus
  • †Gomphotaria pugnax – type locality for species
• †Gomphotherium
• †Goniobasis – tentative report
• Goniopora
• Gopherus
  • †Gopherus agassizii
• †Gordonia
• Granulina
• Gymnogyps
  • †Gymnogyps californianus – type locality for species
• Gyroidina
• Haliaeetus
  • †Haliaeetus leucocephalus
• †Haliaetus
• Haminoea

• 

  †Harpagolestes – or unidentified comparable form
• Heloderma
• †Hemiauchenia
  • †Hemiauchenia macrocephala
• Hemipristis
  • †Hemipristis serra
• Hemitelia
• Hemitoma
• Here
• †Herpetocetus

• 

  †Herpetotherium
  • †Herpetotherium knighti – or unidentified comparable form
• Hespererato
  • †Hespererato columbella
• †Hesperocamelus – or unidentified comparable form
• Hesperomys
• †Hesperotestudo
• Heterodontus
• Hexagrammos
• Hexanchus
• Hiatella
  • †Hiatella arctica
• †Hiltonius

• 

  †Hipparion
  • †Hipparion forcei
• †Hippidion
• Hipponix
• †Hipponoe
• †Hippotherium
• Histrionicus
  • †Histrionicus histrionicus – tentative report
• Hodomys
• Homalopoma
• Homo
  • †Homo sapiens

• 

  †Homotherium
  • †Homotherium serum – or unidentified comparable form
• †Hoplophoneus
• †Hyaenodon
  • †Hyaenodon venturae
  • †Hyaenodon vetus – type locality for species
• Hyalina
• Hydrangea
• †Hydrodamalis
  • †Hydrodamalis cuestae – type locality for species
  • †Hydrodamalis gigas
• Hydrophilus
• Hyla
• †Hyopsodus – or unidentified comparable form
• †Hyperbaena
• †Hypertragulus
• †Hypohippus
• †Hypolagus
• †Hyrachyus
• †Ilingoceros

• 

  †Imagotaria – type locality for genus
  • †Imagotaria downsi – type locality for species
• †Indarctos
• †Inga
• †Ioscion
• Ischnochiton
• †Ischyrocyon
• †Ischyromys
• Isognomon
• Isurus
  • †Isurus oxyrinchus
  • †Isurus planus
• Jaton
• †Julus
• †Juncus
• Juniperus
• Kelletia
  • †Kelletia kelletii
• Kellia

• 

  †Kentriodon – type locality for genus
• †Keteleeria
• †Kingena
• Kurtzia
  • †Kurtzia arteaga
• Kurtziella
  • †Kurtziella plumbea
• †Labyrinthus
• Lacuna
  • †Lacuna porrecta
  • †Lacuna unifasciata
• †Lacunaria
• Laevicardium
  • †Laevicardium elatum
• Lagena
• Lamna
• Lampanyctus
• †Lampris – type locality for genus

  • 

    †Lampris zatima – type locality for species
• Lampropeltis
  • †Lampropeltis getulus
• Larus
  • †Larus californicus
  • †Larus delawarensis
  • †Larus glaucescens
  • †Larus philadelphia
• Latirus
• †Laytonia – type locality for genus
• Lechytia
• Leda
• Lepeta
• Lepidochitona
• Lepisosteus
  • †Lepisosteus spatula – or unidentified comparable form
• †Leptacanthichthys
  • †Leptacanthichthys gracilispinis

• 

  †Leptocyon
• †Leptomeryx
  • †Leptopecten latiauratus
• †Leptoreodon
• Lepus
  • †Lepus americanus
  • †Lepus californicus
  • †Lepus callotis
• Leukoma
  • †Leukoma staminea
• Lima
• Limaria

• 

  †Limnocyon
• †Limosa
  • †Limosa fedoa
• Linga
• †Linophryne
  • †Linophryne indica
• †Liolithax – type locality for genus
• Liquidambar
• †Lirosceles
• Lirularia
  • †Lirularia lirulata
• Lissodelphis – or unidentified comparable form
• †Lithocarpus
• Lithophaga
• Lithophyllum

• 

  †Lithornis – or unidentified comparable form
• Lithothamnion
• Littorina
  • †Littorina scutulata
• †Lompoquia – type locality for genus
• Lontra
  • †Lontra canadensis
• †Lophar – type locality for genus
• †Lophocetus
• †Lophortyx
• †Lora
• Lottia
  • †Lottia limatula
  • †Lottia scabra
• Lucapinella
  • †Lucapinella callomarginata
• Lucina
• Luidia
• †Lycophocyon – type locality for genus
  • †Lycophocyon hutchisoni – type locality for species
• †Lygisma – type locality for genus
• Lygodium
• Lynx
  • †Lynx rufus
• Lyonsia
• Lyria

• 

  †Machairodus
• Macoma
  • †Macoma nasuta
• Macrarene
• Macrocallista
• †Macrodelphinus – type locality for genus
• Madrepora
• Magnolia
• Mahonia
• Makaira
• Malea
  • †Malea ringens
• Mallotus
• †Mammut
  • †Mammut americanum
  • †Mammut cosoensis
  • †Mammut matthewi
• †Mammuthus
  • †Mammuthus columbi

  • 

    †Mammuthus exilis
  • †Mammuthus primigenius
• †Mancalla – type locality for genus
  • †Mancalla californiensis – type locality for species
• †Mangelia
• Margarites
  • †Margarites pupillus
• Marginella
• Marmota
• Martes
• Martesia
• Maxwellia
  • †Maxwellia gemma
• †Mayena – tentative report
• †Mediochoerus
• †Megacamelus
• Megachasma
• Megachile
  • †Megachile gentilis
• †Megahippus

• 

  †Megalonyx
  • †Megalonyx jeffersonii
  • †Megalonyx wheatleyi
• Megalops – tentative report
• †Megapaloelodus
• Megaptera
• Megathura – tentative report
• †Megatylopus
• Melampus
• Melanella
• Melanitta
  • †Melanitta deglandi – tentative report
  • †Melanitta fusca
  • †Melanitta perspicillata
• Melanoplus
  • †Melanoplus differentialis
• Meleagris
• †Meliosma
• Melospiza
  • †Melospiza melodia
• †Meniscotherium

• 

  †Menoceras
• Mephitis
  • †Mephitis mephitis
• Meretrix
• Mergus
  • †Mergus serrator
• Merluccius
  • †Merluccius productus
• †Merriamoceros
• †Merychippus
• †Merychyus

• 

  †Merycodus
• Mesalia
• †Mesocyon
• †Mesodma – tentative report
• †Mesohippus
• Mesophyllum
• †Mesoreodon
• †Metalopex
• †Metarhinus
• †Metatomarctus

• 

  †Metaxytherium
• †Miacis
• †Michenia
• †Microcosmodon – or unidentified comparable form
• Microdipodops
• Microgadus – tentative report
• †Microsyops
• †Microtomarctus
• Microtus
  • †Microtus californicus
• †Miocryptorhopalum – type locality for genus
• †Miocyon
• †Miohippus
• †Miomancalla
• †Miotapirus
• †Miotylopus

• 

  †Miracinonyx
  • †Miracinonyx studeri – tentative report
• Mirounga
  • †Mirounga angustirostris – or unidentified comparable form
• Mitra
  • †Mitra fultoni
  • †Mitra idae
• Mitrella
  • †Mitrella carinata
• †Mixocetus – type locality for genus
• Modiolus
  • †Modiolus capax – or unidentified comparable form
• Modulus
• Monoplex
  • †Monoplex amictus
• †Monosaulax
• Montipora
• Mopalia
  • †Mopalia ciliata
• †Moropus
• Morula
• Morus – or unidentified comparable form
• Morus
• Mulinia
• Murex – or unidentified related form
• Musculus
• Mustela
  • †Mustela frenata
• †Mya
  • †Mya truncata
• Myctophum
• Myliobatis
  • †Myliobatis californicus

• 

  †Mylohyus
  • †Mylohyus fossilis
• †Mylopharodon
  • †Mylopharodon conocephalus
• Mytilus
  • †Mytilus californianus
  • †Mytilus edulis
• Myurella
• †Nannippus
• †Nannocetus – type locality for genus
• †Nanotragulus
• Narona
  • †Narona clavatula
• Nassa

• 

  Nassarius
  • †Nassarius fossatus
• Natica
• Naticarius
• †Navahoceros
• Nectandra
• Negaprion
• †Neobernaya
  • †Neobernaya spadicea
• †Neogyps
  • †Neogyps errans
• †Neohipparion
• †Neoliotomus – or unidentified comparable form
• †Neolitsea

• 

  †Neoparadoxia – type locality for genus
  • †Neoparadoxia cecilialina – type locality for species
  • †Neoparadoxia repenningi – type locality for species
• Neophrontops
  • †Neophrontops americanus
• †Neoplagiaulax
• Neotamias
  • †Neotamias senex
• †Neotherium – type locality for genus
• Neotoma
  • †Neotoma cinerea – type locality for species
  • †Neotoma fuscipes
  • †Neotoma lepida
• Neptunea
• Nerita
• Neritina
• †Nerium
• Neverita
• Nicrophorus
  • †Nicrophorus guttula
  • †Nicrophorus marginatus – type locality for species
  • †Nicrophorus nigrita
• †Nimravides

• 

  †Nimravus
• Niso – tentative report
• †Nitzschia
• Nodipecten
  • †Nodipecten subnodosus
• Norrisia
  • †Norrisia norrisii
• †Nothrotheriops
• †Nothrotherium
• Notiosorex
  • †Notiosorex crawfordi
• Notoacmea

• 

  Notorhynchus
• †Nototamias
• Nucella
  • †Nucella emarginata
  • †Nucella lamellosa
  • †Nucella lima
• Nucula
• Numenius

  • 

    †Numenius phaeopus
• Nuttallia
• †Nyssa
• Oceanodroma
  • †Oceanodroma furcata
  • †Oceanodroma homochroa
• Ocenebra
• Ocotea
• †Ocystias
• †Odaxosaurus
• Odobenus
  • †Odobenus rosmarus

• 

  Odocoileus
  • †Odocoileus hemionus
  • †Odocoileus virginianus – or unidentified comparable form
• Odontaspis
  • †Odontaspis ferox
• Odostomia
  • †Odostomia avellana
  • †Odostomia beringi – or unidentified comparable form
  • †Odostomia californica – or unidentified comparable form
  • †Odostomia callimene – or unidentified related form
  • †Odostomia columbiana – or unidentified comparable form

  • 

    †Odostomia donilla
  • †Odostomia eugena
  • †Odostomia farallonensis
  • †Odostomia fetella
  • †Odostomia gravida
  • †Odostomia helena
  • †Odostomia minutissima – or unidentified comparable form
  • †Odostomia nemo
  • †Odostomia nota
  • †Odostomia stephensae
  • †Odostomia tenuisculpta – or unidentified comparable form
• Oenopota
  • †Oenopota tabulata
• Oliva
  • †Oliva spicata
• Olivella
  • †Olivella baetica
  • †Olivella biplicata
  • †Olivella gracilis
  • †Olivella pedroana
• Oncorhynchus

  • 

    †Oncorhynchus rastrosus
• Ondatra
• Oneirodes
• Onthophagus
• Onychomys
  • †Onychomys torridus
• Ophiodermella
  • †Ophiodermella inermis
• †Opisthonema
• Oreamnos
  • †Oreamnos americanus
• Oreortyx
  • †Oreortyx picta
• Orthemis
  • †Orthemis ferruginea
• Orthodon
• †Osbornodon

• 

  †Osteodontornis – type locality for genus
  • †Osteodontornis orri – type locality for species
• Ostrea
  • †Ostrea conchaphila
  • †Ostrea lurida
• †Otodus
  • †Otodus megalodon
• Otus
  • †Otus asio
• Ovibos
  • †Ovibos moschatus
• Ovis
  • †Ovis canadensis
• †Oxyrhina
• †Oxyura
  • †Oxyura jamaicensis
• †Ozymandias – type locality for genus
• †Pacifichelys
• †Palaeolagus

• 

  †Paleoparadoxia
  • †Paleoparadoxia tabatai
• Pandora
• Panopea
  • †Panopea abrupta
• Panthera
  • †Panthera leo
  • †Panthera onca – or unidentified comparable form
• †Parabalaenoptera – type locality for genus
  • †Parabalaenoptera baulinensis – type locality for species
• †Paracynarctus
• †Parahippus
• Paralichthys – type locality for genus

• 

  †Paramylodon
  • †Paramylodon harlani
• †Paramys
• †Parapontoporia
  • †Parapontoporia sternbergi – type locality for species
• †Parastylotermes
  • †Parastylotermes calico – type locality for species
  • †Parastylotermes frazieri – type locality for species
• †Paratomarctus
• †Parietobalaena
• †Paronychomys
• †Parribacus
• Patelloida
• Pecten
• †Pedalion
• †Pediomeryx
• †Pelagiarctos – type locality for genus
  • †Pelagiarctos thomasi – type locality for species

• 

  †Pelagornis
• Pelecanus
  • †Pelecanus erythrorhynchus – or unidentified comparable form
  • †Pelecanus occidentalis
• †Peltosaurus
• †Peraceras
• Perognathus
• Peromyscus
  • †Peromyscus truei – or unidentified comparable form
• †Perse
• Persea
• Persististrombus
• Petricola
• Phalacrocorax
  • †Phalacrocorax auritus
  • †Phalacrocorax pelagicus
  • †Phalacrocorax penicillatus
• Phalaropus
  • †Phalaropus fulicaria
  • †Phalaropus lobatus
• †Phanaeus

• 

  †Phlaocyon
• Phloeodes
  • †Phloeodes diabolicus
  • †Phloeodes plicatus
• †Phoberogale
• Phoca
  • †Phoca vitulina – or unidentified comparable form
• Phocoena – or unidentified comparable form
• †Phoebastria
  • †Phoebastria albatrus – type locality for species
• Phoenicopterus – or unidentified comparable form
• Pholadidea
• Pholadomya
• Pholas
• Phos
• †Photinia

• 

  Phrynosoma
• Phyllonotus
• Physa
• Picea
• Pinna
• Pinus
  • †Pinus muricata
  • †Pinus radiata
• Piranga
  • †Piranga ludoviciana
• Pitar
• Pituophis
  • †Pituophis melanoleucus
• Pitymys
• Platanus

• 

  †Platygonus
• Platynus
• Plegadis
  • †Plegadis chihi
• †Pleiolama
• †Plesiadapis
• †Plesiogulo
• Pleurofusia
• †Pleuroncodes
• †Pleuronichthys
• †Pliauchenia
• †Pliocyon
• †Pliohippus
• †Pliometanastes
• †Plionarctos

• 

  †Pliopedia – type locality for genus
  • †Pliopedia pacifica – type locality for species
• †Plithocyon
• Pluvialis
  • †Pluvialis squatarola
• †Poabromylus – tentative report
• Pocillopora
• Podiceps
  • †Podiceps auritus
• Podilymbus
  • †Podilymbus podiceps
• Pododesmus
  • †Pododesmus macrochisma
• †Poebrodon
  • †Poebrodon californicus – type locality for species

• 

  †Pogonodon
• Polinices
  • †Polinices lewisii
• Polydora
• Polymesoda
• Polystira
• †Pongamia
• †Pontolis – or unidentified comparable form
  • †Pontolis magnus
• Populus
• Porichthys

  • 

    †Porichthys notatus
• Porites
• †Portunites
• †Potamides
• †Praemancalla – type locality for genus
• Priene
• Prionace
  • †Prionace glauca
• †Pristichampsus
• Pristiophorus
• †Procamelus
• †Procynodictis
• Procyon
  • †Procyon lotor
• †Promartes
• †Protanthias – type locality for genus
• †Protepicyon

• 

  †Protitanops
• †Protohepialus – type locality for genus
  • †Protohepialus comstocki – type locality for species
• †Protolabis
• †Protomarctus
• †Protostrix
• Protothaca
• †Protylopus
• Prunus

• 

  †Psephophorus
• †Pseudaelurus
• Pseudochama
• Pseudoliva
• Pseudomelatoma
  • †Pseudomelatoma penicillata
• †Pseudoseriola – type locality for genus
• †Pseudotsuga
• Pteria
• †Pteroplatea
• Pteropurpura
  • †Pteropurpura festiva
• Pterostichus
• Pterynotus

• 

  †Ptilodus
• Ptinus
• Ptychoramphus
  • †Ptychoramphus aleuticus
• Puffinus
  • †Puffinus griseus
  • †Puffinus opisthomelas
  • †Puffinus tenuirostris
• †Puma
  • †Puma concolor – type locality for species
• Puncturella
  • †Puncturella galeata
• Purpura
• Pusula

• 

  Pycnodonte
• Pyramidella
  • †Pyramidella adamsi – or unidentified comparable form
• Pyrene
• Quercus
• Raja
• Rallus
  • †Rallus limicola
• †Ramoceros
• †Raja
• Rallus
  • †Rallus limicola

• 

  †Ramoceros
• †Rana
• Rapana
• Recurvirostra
• Reithrodontomys
• †Repomys
• Reticulitermes
• Reticutriton
• Retusa
• †Rhabdammina
• †Rhamnidium
• †Rhamnus
• Rhus

• 

  †Rhynchotherium
• †Rhythmias
• Rimella
• Rissa
  • †Rissa tridactyla
• Rissoina
• †Robinia
• †Rotularia
• Sabal
• Sagmatias
• Salix
• †Saniwa
  • †Saniwa ensidens – type locality for species
• †Sapindus
• †Sarda
• Sassia
• Saxidomus
  • †Saxidomus gigantea
  • †Saxidomus nuttalli

• 

  †Scaldicetus
• Scapanus
  • †Scapanus latimanus
• Scaphander
• Scapharca
• Scaphinotus
  • †Scaphinotus interruptus
• †Scaphohippus
• Sceloporus
  • †Sceloporus occidentalis
• †Schistomerus – type locality for genus
  • †Schistomerus californense – type locality for species
• Schizaster
• Sciurus
• Scomber
• †Scomberesox

• 

  Scopelogadus
• †Scutella
• Scyliorhinus
• †Scymnorhinus
• †Sebastodes
• Seila
• Semele – tentative report
• Semele
• Semicassis
• Semicossyphus

• 

  †Semirostrum – type locality for genus
  • †Semirostrum ceruttii – type locality for species
• †Sequoiadendron
• †Serbelodon
• Serica
• Seriola
• Seriphus
  • †Seriphus politus
• Serpula
• Serpulorbis

• 

  †Sespia
• Siderastrea
• Sigmodon
• Sigmoilina – tentative report
• Siliqua
  • †Siliqua patula – or unidentified related form
• Sinum
• Siphonalia
• Skenea
  • †Skenea californica
• †Smilax

• 

  †Smilodon
  • †Smilodon fatalis
  • †Smilodon gracilis
• †Smilodonichthys
• Solariella
  • †Solariella peramabilis
• Solemya
• Solen
• Solenosteira
• Sorex
• Spermophilus

  • 

    †Spermophilus beecheyi
  • †Spermophilus lateralis
• Sphyrna
• Spilogale
  • †Spilogale putorius
• Spirotropis
• Spisula
• Spondylus
• Squalus
• Squatina
  • †Squatina californica – or unidentified comparable form
• Squilla

• 

  †Stegomastodon
  • †Stegomastodon mirificus – or unidentified comparable form
• Stenella
• †Stenomylus
  • †Stenomylus hitchcocki – or unidentified comparable form
• Stenoplax
  • †Stenoplax conspicua
• Stercorarius
• Sterna
• †Sternbergia – type locality for genus
• Sthenictis
• †Stictocarbo

• 

  †Stockoceros – or unidentified comparable form
• Stomias
• Stramonita
  • †Stramonita biserialis
  • †Stramonita canaliculata
• †Striatolamia
• Strioterebrum
• Strombiformis
• Strombus
  • †Strombus galeatus
  • †Strombus gracilior
• Strongylocentrotus
• †Strongylodon
• Sturnella

• 

  †Stylemys
• Subcancilla
  • †Subcancilla sulcata
• †Subhyracodon
• Succinea
• Sula
• †Syllomus – or unidentified comparable form
• Sylvilagus
  • †Sylvilagus audubonii
  • †Sylvilagus bachmani
  • †Sylvilagus floridanus

• 

  Syngnathus
• Synthliboramphus
  • †Synthliboramphus antiquus
  • †Synthliboramphus hypoleucus
• †Tabernaemontana
• Tadorna
  • †Tadorna tadorna
• Tagelus
  • †Tagelus californianus
  • †Tagelus subteres
• Tamias
• Tamiasciurus
  • †Tamiasciurus hudsonicus
• †Tanymykter

• 

  Tapirus
  • †Tapirus californicus
  • †Tapirus merriami – type locality for species
• †Tapocyon
• Taranis
• Taricha
• Taxidea
  • †Taxidea taxus
• Tayassu
• Tegula
  • †Tegula aureotincta
  • †Tegula eiseni
  • †Tegula ligulata

• 

  †Teleoceras
• Tellina
• †Temnocyon
• Tenagodus
• †Teratornis
  • †Teratornis merriami
• Terebellum
• Terebra
  • †Terebra pedroana
  • †Terebra protexta
• Terebratula
• Teredo
• Terminalia
• †Tessarolax – tentative report
• Testudo
• †Tetraclaenodon
• †Tetrameryx
• Thais

• 

  †Thalassoleon
  • †Thalassoleon macnallyae – type locality for species
  • †Thalassoleon mexicanus
• †Thamnasteria
• Thamnophis
• Thomomys
  • †Thomomys bottae
  • †Thomomys monticola
• Thracia
• Thunnus – type locality for genus
• Thyasira
• †Thyrsites
• †Ticholeptus
• Timoclea

• 

  †Titanotylopus
• Tivela
  • †Tivela stultorum
• †Tomarctus
  • †Tomarctus brevirostris
  • †Tomarctus hippophaga
• Totanus
• †Toxicodendron
• Toxopneustes
  • †Toxopneustes roseus – or unidentified comparable form
• Toxostoma
  • †Toxostoma redivivum
• Trachycardium

• 

  Tremarctos
  • †Tremarctos floridanus
• Tresus
  • †Tresus capax
  • †Tresus nuttallii
• Triakis – tentative report
• Trichotropis
• Tricolia
  • †Tricolia pulloides
  • †Trigonictis macrodon
• Trionyx
• Triphora
• Triplofusus
  • †Triplofusus princeps
• Trochita
• †Trogosus
• Trophon
• Tucetona
  • †Tucetona multicostata
• †Tunita – type locality for genus
• Turbonilla
  • †Turbonilla aepynota
  • †Turbonilla almo
  • †Turbonilla asser
  • †Turbonilla canfieldi
  • †Turbonilla carpenteri
  • †Turbonilla laminata
  • †Turbonilla pentalopha
  • †Turbonilla raymondi
  • †Turbonilla regina
  • †Turbonilla stylina
  • †Turbonilla tenuicula
  • †Turbonilla torquata
  • †Turbonilla tridentata
  • †Turbonilla weldi

• 

  Turcica
  • †Turcica caffea
• Turdus
• †Turio
• Turricula
• Turris
• Turritella
• Turritriton
  • †Turritriton gibbosus
• Tursiops – or unidentified comparable form
• Typha
• Typhis
• Tyto
  • †Tyto alba
• Uca

• 

  †Uintatherium
• Ulmus
• †Umbellularia
• Uria
  • †Uria aalge
• †Urobatis
  • †Urobatis halleri
• †Urocitellus
  • †Urocitellus beldingi
• Urocyon
  • †Urocyon cinereoargenteus
• Urolophus
  • †Urolophus halleri – tentative report
• Ursus

  • 

    †Ursus americanus
• †Ustatochoerus
• Uta
  • †Uta stansburiana
• †Valenictus – type locality for genus
  • †Valenictus chulavistensis – type locality for species
  • †Valenictus imperialensis – type locality for species
• †Vanderhoofius
• Vasum
• †Vauquelinia
• †Velates
• Velutina
  • †Velutina velutina
• Venericardia
• Venus
• Vermicularia
• Veromessor

• 

  †Viburnum
• †Vireo
• Vitrinella – tentative report
• Volsella
• Voluta
• Volutopsius
• †Vouapa
• Vulpes
  • †Vulpes cascadensis
  • †Vulpes velox
• Williamia
• †Wodnika

• 

  Xenophora
• †Xyne – type locality for genus
• Yoldia
  • †Yoldia cooperii
• †Yumaceras – tentative report
• †Zachrysia
• Zalophus
  • †Zalophus californianus
• †Zamites
• †Zaphleges
  • †Zaphleges longurio
• †Zapteryx
• †Zarhinocetus
  • †Zarhinocetus errabundus – type locality for species
• Zelkova
• Zenaida
  • †Zenaida macroura
• Zonotrichia
  • †Zonotrichia leucophrys

• 

  †Zygolophodon

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 7 August 2017.