1. Precambrian

2. Paleozoic
    Selected Paleozoic taxa of California 

3. Mesozoic
    Selected Mesozoic taxa of California 

4. Cenozoic
    Selected Cenozoic taxa of California 

5. References

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.

Precambrian

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

Paleozoic

Selected Paleozoic taxa of 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

Mesozoic

Selected Mesozoic taxa of California

• †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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

Cenozoic

Selected Cenozoic taxa of California

• †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
• {{multiple image

}} †Aelurodon

• †Aepycamelus
  • †Aepycamelus alexandrae
• Aequipecten
• Aesopus
• Aethia
• Agaronia
• Agelaius
• †Agriotherium
• †Ailanthus
• Akera
• Alaba
• Alabina
• †Albicetus
• Alca
• †Alcodes
• Aleochara
• Aletes
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
  • {{multiple image

}} †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
• {{multiple image

}} †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
  • {{multiple image

}} †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
• {{multiple image

}} 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
• 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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †Desmostylus

• †Desmostylus hesperus – type locality for species

• Diacria
• †Diceratherium
• Dichocoenia
• †Dinohippus
• †Dinohyus
  • †Dinohyus hollandi
• Diodora
  • †Diodora arnoldi
  • †Diodora aspera
  • †Diodora inaequalis
• Diomedea
• †Diomedia
• †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
  • {{multiple image

}} †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
• Lagenorhynchus
• Lamna
• Lampanyctus
• †Lampris – type locality for genus
  • {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} 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
• {{multiple image

}} †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
• {{multiple image

}} †Macrodelphinus – type locality for genus

• Madrepora
• Magnolia
• Mahonia
• Makaira
• Malea
  • †Malea ringens
• Mallotus
• †Mammut
  • †Mammut americanum
  • †Mammut cosoensis
  • †Mammut matthewi
• {{multiple image

}} †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
• {{multiple image

}} 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
• {{multiple image

}} †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
• {{multiple image

}} †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
• Myodes
• 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
• {{multiple image

}} †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
• {{multiple image

}} †Nimravus

• Niso – tentative report
• †Nitzschia
• Nodipecten
  • †Nodipecten subnodosus
• Norrisia
  • †Norrisia norrisi
• †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
  • {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †Platygonus

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

}} †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
• {{multiple image

}} †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
• Salix
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} †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
• {{multiple image

}} Tapirus

• †Tapirus californicus
• †Tapirus merriami – type locality for species

• †Tapocyon
• Taranis
• Taricha
• Taxidea
  • †Taxidea taxus
• Tayassu
• Tegula
  • †Tegula aureotincta
  • †Tegula eiseni
  • †Tegula ligulata
• {{multiple image

}} †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
• {{multiple image

}} 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
• {{multiple image

}} †Zamites

• †Zaphleges
  • †Zaphleges longurio
• †Zapteryx
• †Zarhinocetus
  • †Zarhinocetus errabundus – type locality for species
• Zelkova
• Zenaida
  • †Zenaida macroura
• Zonotrichia
  • †Zonotrichia leucophrys
• †Zygolophodon

References

• {{cite web |title=Fossilworks: Gateway to the Paleobiology Database |author=Various Contributors to the Paleobiology Database |url=http://fossilworks.org/ |accessdate=7 August 2017}}

• Lorenzo Aragón
• Lorenzo Aragón Armenteros
• Lorenzo A. Richards
• Lorenzo Bandini Trophy
• Lorenzo Belli
• Lorenzo Bergonzoni
• Lorenzo Bergunzi
• Lorenzo Berlèse
• Lorenzo Bernardi
• Lorenzo Bernucci
• Lorenzo Binago
• Lorenzo Bini Smaghi
• Lorenzo Booker
• Lorenzo Borghese
• Lorenzo Boturini Benaducci
• Lorenzo Boturini Benaduci
• Lorenzo Brentano
• Lorenzo Bromell
• Lorenzo Bucchi
• Lorenzo Bundy
• Lorenzo Burrows
• Lorenzo Cadieux
• Lorenzo Camerano
• Lorenzo Carbonell Santacruz
• Lorenzo Carcaterra