List of the Mesozoic life of Texas

• 

  Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Acanthoceras
  † Acanthoceras
  • † Acanthoceras adkinsi
  • † Acanthoceras amphibolum
  • † Acanthoceras barcusi
  • † Acanthoceras eulessanum
  • † Acanthoceras johnsonanum
  • † Acanthoceras tarrantense
    • † Acanthoceras tarrantense nitidum
  • † Acanthoceras wintoni
  • † Acanthoceras worthense
• Acesta
  • † Acesta sayeri
  • † Acesta sayrei
• Acila
  • † Acila chicotana
• Acirsa
  • † Acirsa flexicostata – tentative report
• Acmaea
  • † Acmaea occidentalis
  • † Acmaea pilleolus
• † Acompsoceras
• 

  Life restoration of the Early Cretaceous theropod dinosaur Acrocanthosaurus
  † Acrocanthosaurus
  • † Acrocanthosaurus atokensis
• † Acrosmilia
• Acteon
  • † Acteon nitidus – tentative report
  • † Acteon throckmortoni
• † Acteonella
  • † Acteonella delgadoi
  • † Acteonella pecosensis
  • † Acteonella sublaevis – or unidentified comparable form
• † Actinacis
  • † Actinacis valverdensis – type locality for species
• † Actinastrea
  • † Actinastrea guadalupae
• † Actinostreon
  • † Actinostreon gregareum
• † Acutostrea
  • † Acutostrea plumosa
• 

  Life restoration of the Late Triassic synapsid (mammal precursor) Adelobasileus
  † Adelobasileus – type locality for genus
  • † Adelobasileus cromptoni – type locality for species
• † Adinodon
  • † Adinodon pattersoni – type locality for species
• † Adkinsella – type locality for genus
  • † Adkinsella edwardsensis – type locality for species
• † Adkinsia
  • † Adkinsia bosquensis – type locality for species
  • † Adkinsia knikerae – type locality for species
• † Adocus
• † Aenona
  • † Aenona eufaulensis
• † Aetodactylus – type locality for genus
  • † Aetodactylus halli – type locality for species
• † Agerostrea
  • † Agerostrea mesenterica
• † Aguileria
  • † Aguileria cumminsi
• † Agujaceratops
  • † Agujaceratops mariscalensis – type locality for species
• † Akera
  • † Akera constricta
• 

  Alamosaurus
  † Alamosaurus
  • † Alamosaurus sanjuanensis
• † Albanerpeton
  • † Albanerpeton arthridion – type locality for species
  • † Albanerpeton gracilis
  • † Albanerpeton nexuosus
• † Aliofusus
  • † Aliofusus balaniformis
  • † Aliofusus reagani
  • † Aliofusus reagani subtilis
  • † Aliofusus reagani tumidus
• † Aliomactra
  • † Aliomactra compressa
• † Alkaidia – type locality for genus
  • † Alkaidia sumralli – type locality for species
• † Allocrioceras
  • † Allocrioceras annulatum
  • † Allocrioceras dentonense
  • † Allocrioceras larvatum
• Alnus
  • † Alnus trina
• 

  Restorative model of the Late Cretaceous mammal Alphadon
  † Alphadon
  • † Alphadon halleyi – or unidentified comparable form
  • † Alphadon perexiguus – type locality for species
• † Altairia – type locality for genus
  • † Altairia wintoni
• † Amaurellina
  • † Amaurellina stephensoni
• † Ambigostrea
  • † Ambigostrea tecticosta
• † Ambrosea
  • † Ambrosea nitida
• Ammobaculites
  • † Ammobaculites subcretaceous
  • † Ammobaculites subcretaceus
• 

  Fossilized shell of the Jurassic-Miocene sea snail Ampullina
  † Ampullina – or unidentified comparable form
  • † Ampullina abnormalis
  • † Ampullina densatus
  • † Ampullina lirata
• Amuletum
  • † Amuletum boylei
  • † Amuletum curvocostatum
  • † Amuletum venustum
• Amusium
  • † Amusium danei – tentative report
• † Anacolosidites
• † Anaklinoceras
  • † Anaklinoceras reflexum
• † Anatimya
  • † Anatimya anteradiata
  • † Anatimya anteradiata texana
  • † Anatimya eulessana
  • † Anatimya longula
• † Anchura
  • † Anchura bexarensis
  • † Anchura caddoensis
  • † Anchura campbelli
  • † Anchura elegans
  • † Anchura hoggi
  • † Anchura lamari
  • † Anchura modesta
  • † Anchura noackensis
  • † Anchura noakensis – tentative report
  • † Anchura substriata
  • † Anchura turricula
  • † Anchura whitneyensis
• † Ancilla
  • † Ancilla acutula
• † Angistorhinus
  • † Angistorhinus alticephalus – type locality for species
  • † Angistorhinus grandis
• 

  Reconstructive illustration of a fossilized skull of the Late Cretaceous duck-billed dinosaur Angulomastacator
  † Angulomastacator – type locality for genus
  • † Angulomastacator daviesi – type locality for species
• † Anisoceras
  • † Anisoceras armatum
  • † Anisoceras perarmatum
• † Anisomyon
  • † Anisomyon borealis – tentative report
  • † Anisomyon haydeni
• † Anomalina
  • † Anomalina petita
  • † Anomalina torcerensis
• † Anomalofusus
  • † Anomalofusus bellulus
  • † Anomalofusus lemniscatus
• Anomia
  • † Anomia argentaria
  • † Anomia mexicana
  • † Anomia ornata
  • † Anomia ponticulana
  • † Anomia tellinoides
• † Anomoeodus
• † Anomotodon
  • † Anomotodon toddi – type locality for species
• † Antillocaprina
• † Apachesaurus
  • † Apachesaurus gregorii
• † Aphrodina
  • † Aphrodina navarroana
  • † Aphrodina tippana
• Aplousina
• † Apsgnathus – type locality for genus
  • † Apsgnathus triptodon – type locality for species
• † Aquilarhinus – type locality for genus[1]
  • † Aquilarhinus palimentus – type locality for species[2]
• Arca
  • † Arca martindalensis
  • † Arca pergracilis
  • † Arca rostellata
  • † Arca securiculata
• Architectonica
  • † Architectonica voragiformis
• Arcopsis
  • † Arcopsis nolani
• † Arctostrea
  • † Arctostrea falacata
• † Areopsammia – type locality for genus
  • † Areopsammia bakerae – type locality for species
• 

  Restoration of the Late Triassic lungfish Arganodus with an anachronistic human to scale
  † Arganodus
  • † Arganodus dorotheae – type locality for species
• Arrhoges
  • † Arrhoges cibolensis
  • † Arrhoges ciboloensis
  • † Arrhoges lobata media
  • † Arrhoges plenocosta
• † Asciocythere
  • † Asciocythere rotunda
• † Aspidoceras
  • † Aspidoceras laevigatum
• † Astacodes
  • † Astacodes davisi
  • † Astacodes maxwelli
• † Astandes
• Astarte
  • † Astarte culebrensis
  • † Astarte malonensis
• † Astartemya
  • † Astartemya fentressensis
• 

  Electron micrograph and gross view of an Astrangia stony coral
  Astrangia
  • † Astrangia cretacea
  • † Astrangia lamarensis – type locality for species
• Astreopora – tentative report
  • † Astreopora leightoni – type locality for species
• † Astrocoenia
  • † Astrocoenia budaensis – type locality for species
  • † Astrocoenia nidiformis
  • † Astrocoenia scyphoidea – type locality for species
• † Astroconodon – type locality for genus
  • † Astroconodon denisoni – type locality for species
• † Astrocratis – type locality for genus
  • † Astrocratis acutispina – type locality for species
• 

  Life restoration of the Early Cretaceous long-necked dinosaur Astrodon
  † Astrodon
  • † Astrodon johnstoni
• † Astrophocaudia – type locality for genus
  • † Astrophocaudia slaughteri – type locality for species
• † Atreta
  • † Atreta minor
• † Aulastraeopora – type locality for genus
  • † Aulastraeopora harrisi – type locality for species
• † Axonoceras
  • † Axonoceras compressum
  • † Axonoceras multicostatum
  • † Axonoceras multicostatum rotundum
  • † Axonoceras pingue
• † Axosmilia
  • † Axosmilia craginiana – type locality for species
  • † Axosmilia whitneyi – type locality for species

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites
  † Baculites
  • † Baculites aquilaensis - or unidentified loosely related form
  • † Baculites claviformis
  • † Baculites haresi – or unidentified comparable form
  • † Baculites ovatus
  • † Baculites scotti
  • † Baculites taylorensis
  • † Baculites tippahensis
  • † Baculites undatus
• † Baena – report made of unidentified related form or using admittedly obsolete nomenclature
• † Banis
  • † Banis siniformis
• Barbatia – tentative report
  • † Barbatia carolinensis
• † Barroisiceras
• 

  Mounted fossilized skeleton of the Cretaceous turtle Basilemys
  † Basilemys
• † Bathycyathus – tentative report
  • † Bathycyathus lloydi – type locality for species
• † Bathytormus
  • † Bathytormus pteropsis
• † Belemnitella
  • † Belemnitella americana
• † Bellifusus
  • † Bellifusus angulicostatus – or unidentified related form
  • † Bellifusus buffaloensis
  • † Bellifusus coronatus
  • † Bellifusus crassicostatus
  • † Bellifusus deatsvillensis
  • † Bellifusus multicostatus
  • † Bellifusus robustus
  • † Bellifusus tennistriatus
• † Belliscala
  • † Belliscala crideri
  • † Belliscala forbeyi
  • † Belliscala rockensis
• † Belodon
  • † Belodon superciliosus – type locality for species
• 

  Fossilized skeleton of the Late Cretaceous bony fish Belonostomus
  † Belonostomus
• † Beretra
  • † Beretra contracta
  • † Beretra elongata
  • † Beretra firma
  • † Beretra ornatula
  • † Beretra ripleyana
  • † Beretra striata
• 

  Life restoration of the Early Cretaceous crocodilian relative Bernissartia
  † Bernissartia – tentative report
• † Betelgeusia – type locality for genus
  • † Betelgeusia reidi – type locality for species
• † Borissiakoceras
  • † Borissiakoceras orbiculatum
• † Bostrychoceras
  • † Bostrychoceras polyplocum
• Botula
  • † Botula carolinensis
  • † Botula conchafodentis
  • † Botula plumosa
• 

  Life restoration of the Late Cretaceous plesiosaur Brachauchenius hunting a hesperornithiform bird
  † Brachauchenius
  • † Brachauchenius lucasi
• Brachidontes
  • † Brachidontes arlingtonanus
  • † Brachidontes filisculptus
  • † Brachidontes filisculptus microcostae
  • † Brachidontes fulpensis
• Brachiodontes
• † Brachychampsa
• † Brachycythere – tentative report
  • † Brachycythere subconcentrica
• † Brachyrhizodus – type locality for genus
  • † Brachyrhizodus wichitaensis – type locality for species
• † Brachysuchus – type locality for genus
  • † Brachysuchus megalodon – type locality for species
• 

  Life restoration of the Late Cretaceous horned dinosaur Bravoceratops
  † Bravoceratops – type locality for genus
  • † Bravoceratops polyphemus – type locality for species
• † Breviarca
  • † Breviarca grandis
  • † Breviarca habita
  • † Breviarca minor
  • † Breviarca nolani
  • † Breviarca plummeri
• † Brontopodus – type locality for genus
  • † Brontopodus birdi – type locality for species
• † Buccinopsis
  • † Buccinopsis crassa
  • † Buccinopsis crassicostata
  • † Buccinopsis crassus
  • † Buccinopsis globosa
  • † Buccinopsis greenensis
  • † Buccinopsis perryi
  • † Buccinopsis solida
• † Budaia – type locality for genus
  • † Budaia travisensis – type locality for species
• † Budaiceras
  • † Budaiceras alticarinatum
  • † Budaiceras elegantior
  • † Budaiceras hyatti
• † Burckhardtites
  • † Burckhardtites palmensis
• Busycon – tentative report

• Cadulus
  • † Cadulus coonensis
  • † Cadulus obnutus
  • † Cadulus praetenuis
• Caestocorbula
  • † Caestocorbula crassaplica
  • † Caestocorbula crassiplica
  • † Caestocorbula suffalciata
  • † Caestocorbula terramaria
  • † Caestocorbula torta
  • † Caestocorbula williardi
• Callianassa
• † Calliomphalus
  • † Calliomphalus americanus
  • † Calliomphalus bellulus
  • † Calliomphalus microcancelli
• Callistina
  • † Callistina alta
  • † Callistina lamarensis
  • † Callistina munda
  • † Callistina taffi
• † Callodus – type locality for genus
  • † Callodus coronatus – type locality for species
• Callucina
  • † Callucina chatfieldana
  • † Callucina oleodorsum
  • † Callucina seminalis
• † Calyptosuchus – type locality for genus
  • † Calyptosuchus wellesi – type locality for species
• 

  Three modern shells of Calyptraea, or Chinese hat snails
  Calyptraea
• † Camptonectes
  • † Camptonectes bellisculptus
  • † Camptonectes bubonis
  • † Camptonectes burlingtonensis
  • † Camptonectes cavanus
  • † Camptonectes ellsworthensis
  • † Camptonectes kaufmanensis
  • † Camptonectes martinsensis
• Cancellaria
  • † Cancellaria matroni – tentative report
• † Cantabrigites
  • † Cantabrigites spinosum
  • † Cantabrigites subsimplex – or unidentified related form
• Cantharus – tentative report
• † Cantioscyllium
  • † Cantioscyllium meyeri – type locality for species
• † Capellia – type locality for genus
  • † Capellia mauricei – type locality for species
• 

  Fossilized shell of the Cretaceous marine bivalve Caprina
  † Caprina
  • † Caprina coraloidea
  • † Caprina douvillei
• † Caprinuloidea
  • † Caprinuloidea multitubifera
  • † Caprinuloidea perfecta
• Capulus
  • † Capulus cuthandensis
  • † Capulus erectus
  • † Capulus microstriatus – tentative report
  • † Capulus spangleri
• 

  A living Carcharias sand tiger shark
  Carcharias
  • † Carcharias heathi – type locality for species
  • † Carcharias holmdelensis
  • † Carcharias samhammeri – or unidentified comparable form
• † Cardiaster
  • † Cardiaster leonensis
• Cardium
  • † Cardium wadei
• † Caririchnium
  • † Caririchnium protohadrosaurichnos – type locality for species
• Carota
  • † Carota biplicata
  • † Carota pendula
  • † Carota robusta
• † Carycorbula
  • † Carycorbula martinae
• Caryocorbula
  • † Caryocorbula ovisana
  • † Caryocorbula tradingensis
  • † Caryocorbula varia
• 

  A living Caryophyllia solitary coral
  Caryophyllia
  • † Caryophyllia comanchei – type locality for species
  • † Caryophyllia dentonensis – type locality for species
  • † Caryophyllia konincki – type locality for species
• † Caseosaurus – type locality for genus
  • † Caseosaurus crosbyensis – type locality for species
• † Casierius
  • † Casierius heckeli
  • † Casierius heckelii
• † Catactegenys – type locality for genus
  • † Catactegenys solaster – type locality for species
• † Catastomocystis
  • † Catastomocystis spinosa
• 

  Fossilized skeleton of the Permian-Early Cretaceous bony fish Caturus
  † Caturus
• † Caveola
  • † Caveola acuta – tentative report
  • † Caveola bellsana
  • † Caveola producta
• † Cedarosaurus
  • † Cedarosaurus weiskopfae
• † Cenomanocarcinus
  • † Cenomanocarcinus refroae
  • † Cenomanocarcinus renfroae
  • † Cenomanocarcinus vanstraeleni
• 

  Life restoration of the Late Triassic-Eocene lungfish Ceratodus
  † Ceratodus
  • † Ceratodus americanus – or unidentified comparable form
• Ceratotrochus – tentative report
• † Ceriopora
• Cerithiella
  • † Cerithiella nodoliratum – or unidentified related form
  • † Cerithiella semirugatum
• Cerithium
  • † Cerithium simpsonensis
• † Chamops
• † Champsosaurus
• † Chartecytis
• † Cheloniceras
  • † Cheloniceras adkinsi
  • † Cheloniceras cornuelianum
• 

  Restoration of the Late Triassic theropod dinosaur Chindesaurus
  † Chindesaurus
  • † Chindesaurus bryansmalli
• † Chinlea
  • † Chinlea sorenseni
• † Chirostenotes
• † Chondrodonta
  • † Chondrodonta glabra
  • † Chondrodonta munsoni
  • † Chondrodonta youngi – type locality for species
• † Chupacabrachelys – type locality for genus
  • † Chupacabrachelys complexus – type locality for species
• Cidaris
  • † Cidaris hemigranosus
  • † Cidaris texanus
• † Cimexomys
• † Cimoliasaurus
• 

  Life restoration of the Late Cretaceous pterosaur Cimoliopterus (left) stealing fish from another pterosaur
  † Cimoliopterus
  • † Cimoliopterus dunni – type locality for species
• † Cimolodon
  • † Cimolodon electus – or unidentified comparable form
• † Cimolomys
  • † Cimolomys clarki
• † Cinulia
  • † Cinulia tarrantensis – or unidentified related form
• † Cionichthys
  • † Cionichthys greeni – type locality for species
• † Citharina
  • † Citharina kochii
• † Cladoceramus
  • † Cladoceramus undulatoplicatus
• † Cladophyllia
  • † Cladophyllia furcifera
• † Clavipholas
  • † Clavipholas pectorosa
  • † Clavipholas whitfieldi
• † Clevosaurus – or unidentified comparable form
  • † Clevosaurus latidens
• 

  Life restoration of the Late Cretaceous mosasaurid Clidastes
  † Clidastes
  • † Clidastes liodontus
• Cliona
  • † Cliona microtuberum
  • † Cliona retiformis
• † Clisocolus
  • † Clisocolus concentricum
• † Coahomasuchus – type locality for genus
  • † Coahomasuchus kahleorum – type locality for species
• † Coahuilites – tentative report
• † Coalcomana
  • † Coalcomana ramosa
• † Codiopsis
  • † Codiopsis stephensoni – type locality for species
• † Coelodus
  • † Coelodus decaturensis – type locality for species
  • † Coelodus fabadens – type locality for species
• 

  Life restoration of the Late Triassic-Early Jurassic theropod dinosaur Coelophysis with an anachronistic human to scale
  † Coelophysis
• † Coelosmilia
  • † Coelosmilia americana
  • † Coelosmilia texana
• † Coilopoceras
  • † Coilopoceras springeri
• † Collignoniceras
  • † Collignoniceras woollgari
• † Colognathus – type locality for genus
  • † Colognathus obscurus – type locality for species
• † Colombiceras
  • † Colombiceras robustum
• † Columbiceras
  • † Columbiceras robustus
• † Comptoniaster
  • † Comptoniaster adamsi
• † Confusiscala – tentative report
• † Coniasaurus
  • † Coniasaurus crassidens
• † Connectastrea – tentative report
  • † Connectastrea infundibuliformis – type locality for species
• Conopeum
• † Continuoolithus
• † Conulus
  • † Conulus stephensoni – type locality for species
• † Convolosaurus – type locality for genus[3]
  • † Convolosaurus marri – type locality for species[4]
• 

  A living Corbicula basket clam
  Corbicula
• Corbula
  • † Corbula amniculana
  • † Corbula dentonensis
  • † Corbula inflata
  • † Corbula linteroidea
  • † Corbula ponsana
  • † Corbula pulvinata
  • † Corbula rockensis
  • † Corbula senecta
  • † Corbula starana
  • † Corbula subradiata
  • † Corbula subradiata texana
  • † Corbula torta – or unidentified related form
  • † Corbula williardi – tentative report
  • † Corbula woodi
• † Coskinolinoides
  • † Coskinolinoides texanus
• † Costellacesta
  • † Costellacesta sayrei
• † Coupatezia
  • † Coupatezia turneri – type locality for species
• † Craginia
  • † Craginia turriformis
• Crassatella
  • † Crassatella hodgei
  • † Crassatella quinlanensis
  • † Crassatella vadosa
  • † Crassatella vadosa bexarensis
  • † Crassatella vadosa cedarensis
  • † Crassatella vadosa chatfieldensis
  • † Crassatella vadosa manorensis
• 

  Fossilized shell of the Cretaceous-modern oyster Crassostrea
  Crassostrea
  • † Crassostrea cortex
  • † Crassostrea cusseta
  • † Crassostrea trigonalis
• † Crateraster
  • † Crateraster quinqueloba
  • † Crateraster texensis
• † Crenella
  • † Crenella elegantula
  • † Crenella serica
  • † Crenella subcircularis
• † Creonella
  • † Creonella deusseni
  • † Creonella triplicata
  • † Creonella whitei
• † Cretacoranina
  • † Cretacoranina dichrous
• 

  Fossil of the Early Cretaceous-Eocene shark Cretolamna
  † Cretolamna
  • † Cretolamna appendiculata
  • † Cretolamna maroccana
• † Cretorectolobus
  • † Cretorectolobus olsoni – or unidentified comparable form
• † Crosbysaurus – type locality for genus
  • † Crosbysaurus harrisae – type locality for species
• Ctena
  • † Ctena parvilineata
• 

  Shell of a Cucullaea, or false ark shell
  Cucullaea
  • † Cucullaea blanpiedi
  • † Cucullaea capax
  • † Cucullaea deatvillensis
  • † Cucullaea kingsensis
  • † Cucullaea murrayi
  • † Cucullaea powersi
• † Cuna
  • † Cuna texana
• † Curtocaprina – type locality for genus
  • † Curtocaprina clabaughikinsorum – type locality for species
• Cuspidaria
  • † Cuspidaria alaeformis
  • † Cuspidaria ampulla
  • † Cuspidaria grandis
  • † Cuspidaria grovensis
• † Cyathomorpha – tentative report
  • † Cyathomorpha damoni – type locality for species
• † Cyathophora
  • † Cyathophora haysensis – type locality for species
  • † Cyathophora olssoni – type locality for species
• † Cyclorisma
  • † Cyclorisma orbiculata
  • † Cyclorisma parva
  • † Cyclorisma pumila
• † Cyclothyris
  • † Cyclothyris americana
• Cylichna
  • † Cylichna incisa
  • † Cylichna secalina
• 

  Fossilized shell of the Late Jurassic-Oligocene nautiloid cephalopod Cymatoceras
  † Cymatoceras
  • † Cymatoceras hilli – or unidentified comparable form
  • † Cymatoceras texanum
• † Cymbophora
  • † Cymbophora appressa
  • † Cymbophora berryi
  • † Cymbophora cancellosa
  • † Cymbophora inflata
  • † Cymbophora puteana
  • † Cymbophora saccellana
  • † Cymbophora scabellum
  • † Cymbophora schucherti
  • † Cymbophora securis
  • † Cymbophora simpsonensis
  • † Cymbophora spooneri
  • † Cymbophora subtilis
  • † Cymbophora wordeni
• † Cymella
  • † Cymella bella
  • † Cymella bella texana
  • † Cymella ironensis
• † Cypridae
  • † Cypridae wyomingensis – or unidentified related form
• † Cyprimeria
  • † Cyprimeria alta
  • † Cyprimeria coonensis
  • † Cyprimeria depressa
  • † Cyprimeria patella
• Cythere
  • † Cythere concentrica
• † Cythereis
  • † Cythereis dentonensis
  • † Cythereis hawleyi
  • † Cythereis nuda
  • † Cythereis ornatissima
  • † Cythereis paupera
  • † Cythereis pustulosissima
  • † Cythereis worthensis
• Cytherella
  • † Cytherella comanchensis
• Cytherelloidea
  • † Cytherelloidea reticulata
  • † Cytherelloidea williamsoniana
• Cytheropteron
  • † Cytheropteron rugosalatum
• Cyzicus – tentative report
  • † Cyzicus shupei

• 

  Life restoration of the Late Cretaceous primitive mosasaur Dallasaurus
  † Dallasaurus – type locality for genus
  • † Dallasaurus turneri – type locality for species
• † Darwinula
• Dasmosmilia
  • † Dasmosmilia kochii – type locality for species
• Dasyatis
  • † Dasyatis commercensis – type locality for species
• † Dathmila
  • † Dathmila lineola
• † Dawsonius
  • † Dawsonius tigris
• 

  Mounted fossilized skeleton of the Late Cretaceous Alligator relative Deinosuchus
  † Deinosuchus
  • † Deinosuchus riograndensis
  • † Deinosuchus rugosus – type locality for species
• † Deltaichthys
  • † Deltaichthys albuloides
• † Dendrosmilia – tentative report
  • † Dendrosmilia texana
• † Denebia – type locality for genus
  • † Denebia americana
• Dentalina
  • † Dentalina communis
• Dentalium
  • † Dentalium inornatum
  • † Dentalium leve
  • † Dentalium minor
  • † Dentalium navarroi
  • † Dentalium pauperculum
  • † Dentalium sublineatum
  • † Dentalium vaughani
• † Dentonia
  • † Dentonia leveretti
• 

  Restoration of the Late Triassic aetosaur Desmatosuchus with an anachronistic human to scale
  † Desmatosuchus
  • † Desmatosuchus haplocerus
  • † Desmatosuchus smalli – type locality for species
  • † Desmatosuchus spurensis – type locality for species
• † Desmoceras
• † Deussenia
  • † Deussenia bellalirata
  • † Deussenia ciboloensis
  • † Deussenia corbis
  • † Deussenia multilirae
  • † Deussenia travisana
• † Dhondtichlamys
  • † Dhondtichlamys venustus
• † Dichastopollenites
• † Dictyoconus
  • † Dictyoconus walnutensis
• † Dimorpharaea
  • † Dimorpharaea manchacaensis – type locality for species
• † Dimorphastrea
  • † Dimorphastrea stantoni – type locality for species
• † Dinogymnium
  • † Dinogymnium acuminatum
  • † Dinogymnium euclaense
• Diodora – tentative report
  • † Diodora bartonvillensis
• 

  Fossilized skeleton of the Late Triassic tuatara relative Diphydontosaurus
  † Diphydontosaurus – or unidentified related form
• † Diploastrea
  • † Diploastrea harrisi – type locality for species
  • † Diploastrea hilli – type locality for species
  • † Diploastrea vaughani – type locality for species
• † Diplolonchidion – type locality for genus
  • † Diplolonchidion murryi – type locality for species
• † Diplomoceras
  • † Diplomoceras trabeatus
• † Discofascigera
• Discorbis
  • † Discorbis correcta
  • † Discorbis minima
• † Discoscaphites
  • † Discoscaphites conradi
  • † Discoscaphites erucoideus
• † Distefanella – or unidentified comparable form
• 

  Mounted fossilized skeleton of the Late Cretaceous plesiosaur Dolichorhynchops
  † Dolichorhynchops
  • † Dolichorhynchops bonneri
• !-- Doswellia: Automatic taxobox --> † Doswellia
• † Douvilleiceras
  • † Douvilleiceras grandense
  • † Douvilleiceras mammillatum
  • † Douvilleiceras offarcinatum – or unidentified comparable form
  • † Douvilleiceras orbignyi – or unidentified comparable form
  • † Douvilleiceras quitmanense
  • † Douvilleiceras rex
  • † Douvilleiceras spathi
• † Douvillelia – tentative report
  • † Douvillelia skeltoni
• 

  Shell of a Dreissena freshwater mussel
  † Dreissena
  • † Dreissena tippana
• † Drepanocheilus
  • † Drepanocheilus corbetensis
  • † Drepanocheilus cuthandensis
  • † Drepanocheilus texanus
• † Drepanochilus
  • † Drepanochilus corbetensis
  • † Drepanochilus davidsi
  • † Drepanochilus martini
  • † Drepanochilus texanus
  • † Drepanochilus triliratus
• † Drilluta
  • † Drilluta brevispira
  • † Drilluta crassicostata
  • † Drilluta crassicostata longa
  • † Drilluta distans
  • † Drilluta major – or unidentified comparable form
  • † Drilluta paucicostata
• 

  Restoration of the Late Triassic dinosaur relative Dromomeron
  † Dromomeron
  • † Dromomeron gregorii – type locality for species
• † Dryptosaurus
• † Dufrenoyia
  • † Dufrenoyia justinae
  • † Dufrenoyia rebeccae
• † Durania

• † Echinocorys
  • † Echinocorys texanus
• † Ecoacteon
  • † Ecoacteon linteus
• † Ecphora
  • † Ecphora proquadricostata
• 

  Fossilized partial skeleton of the Late Cretaceous mosasaur Ectenosaurus
  † Ectenosaurus
• † Edmontonia – or unidentified comparable form
• † Elea – tentative report
• † Elephantaria
  • † Elephantaria simondsi – type locality for species
• † Ellipsoscapha
  • † Ellipsoscapha mortoni
  • † Ellipsoscapha striatella
• 

  Restoration of the Early Cretaceous-Eocene bony fish Enchodus, or the "saber-toothed herring"
  † Enchodus
• † Endoplocytia
• † Endoptygma
  • † Endoptygma leprosa
• † Endostoma
  • † Endostoma mexicana – or unidentified comparable form
• † Engonoceras
  • † Engonoceras complicatum
  • † Engonoceras elegans
  • † Engonoceras gibbosum
  • † Engonoceras hilli
  • † Engonoceras retardum
  • † Engonoceras serpentinum
  • † Engonoceras stolleyi
  • † Engonoceras subjectum – or unidentified related form
• † Enoploclytia
  • † Enoploclytia triglypta
  • † Enoploclytia wintoni
• † Entolium
• † Eoacteon
• † Eodouvilleiceras
• † Eomunidopsis
  • † Eomunidopsis limonitica
• Eonavicula
  • † Eonavicula newspecies1
  • † Eonavicula rostellata
• † Eoradiolites
  • † Eoradiolites davidsoni
• † Eosiderastrea
  • † Eosiderastrea cuyleri – type locality for species
• † Eoursivivas
  • † Eoursivivas harveyi
• † Epiaster
  • † Epiaster whitei
• † Epiphaxum
  • † Epiphaxum labyrinthicum – type locality for species
• † Episcoposaurus – type locality for genus
  • † Episcoposaurus haplocerus – type locality for species
• † Epistomina
  • † Epistomina charlottae
  • † Epistomina lacunosa
• † Epistreptophyllum
  • † Epistreptophyllum boesei – type locality for species
  • † Epistreptophyllum budaensis – type locality for species
  • † Epistreptophyllum shumardi – type locality for species
• † Epitonium
  • † Epitonium sillimani
• † Etea
  • † Etea corsicana
  • † Etea peasi
• † Ethmocardium
  • † Ethmocardium welleri
• † Eubaculites
  • † Eubaculites carinatus
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Eubostrychoceras
  † Eubostrychoceras
  • † Eubostrychoceras reevesi
• † Eucalycoceras
  • † Eucalycoceras templetonense – type locality for species
• † Eufistulana
  • † Eufistulana ripleyana
• † Eufistulina
  • † Eufistulina ripleyana
• † Eugyra
  • † Eugyra cuyleri – type locality for species
• † Euhoplites – tentative report
• † Eulima
  • † Eulima clara
  • † Eulima laevigata
• † Euomphaloceras
  • † Euomphaloceras alvaradoense
  • † Euomphaloceras lonsdalei
  • † Euomphaloceras septemseriatum
• † Eupachydiscus
  • † Eupachydiscus grossouvrei
• 

  Shell of a Euspira moon sea snail
  † Euspira
  • † Euspira dorothiensis
  • † Euspira dorothiensis pendula
  • † Euspira rectilabrum
  • † Euspira rectilabrum texanus
  • † Euspira rivulana
• Euthriofusus – or unidentified related form
  • † Euthriofusus convexus
• † Eutrephoceras
  • † Eutrephoceras dekayi
  • † Eutrephoceras perlatus
  • † Eutrephoceras planoventer
• † Ewingia – type locality for genus
  • † Ewingia problematica – type locality for species
• 

  Fossilized shell of the Jurassic-Cretaceous foam oyster Exogyra
  † Exogyra
  • † Exogyra americana
  • † Exogyra arientina
  • † Exogyra cancellata
  • † Exogyra columbella
  • † Exogyra columbella levis
  • † Exogyra costata
  • † Exogyra costata spinifera
  • † Exogyra erraticostata
  • † Exogyra potosina
  • † Exogyra spinifera
  • † Exogyra texana

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Fagesia
  † Fagesia
  • † Fagesia catinus
• † Faraudiella
  • † Faraudiella franciscoensis
  • † Faraudiella roermeri
• † Faujasia
  • † Faujasia chelonium – type locality for species
• † Favia
  • † Favia texana
• † Feldmannia
  • † Feldmannia wintoni
• † Ficheuria
  • † Ficheuria pernoni – or unidentified related form
• † Fictoacteon
  • † Fictoacteon alveolanus
  • † Fictoacteon humilispira
  • † Fictoacteon imlayi
  • † Fictoacteon saxanus
• Filisparsa
• † Flaventia
  • † Flaventia ludana
• † Flemingostrea
  • † Flemingostrea pratti
  • † Flemingostrea subspatula
  • † Flemingostrea subspatulata
• † Flexomornis – type locality for genus
  • † Flexomornis howei – type locality for species
• † Flickia
  • † Flickia simplex – type locality for species
• † Fomalhautia – type locality for genus
  • † Fomalhautia hortensae – type locality for species
• † Forbesiceras
  • † Forbesiceras beaumontianum
  • † Forbesiceras brundrettei
  • † Forbesiceras conlini
• † Forresteria
  • † Forresteria castellense – type locality for species
  • † Forresteria forresteri – type locality for species
  • † Forresteria sevierense – type locality for species
• † Frenelopsis
  • † Frenelopsis ramosissima
• † Fulgerca
  • † Fulgerca attenuata – or unidentified related form
  • † Fulgerca venusta
• † Fulpia
  • † Fulpia pinguis
• † Fungella
• † Fuscinapedis – type locality for genus
  • † Fuscinapedis woodbinensis – type locality for species
• † Fusimilis
  • † Fusimilis robustus
• 

  A living Fusinus sea snail
  Fusinus
  • † Fusinus cornelianus
  • † Fusinus macnairyensis – or unidentified related form

• 

  A living Galeorhinus galeus school shark
  Galeorhinus
  • † Galeorhinus girardoti – or unidentified related form
• † Gallolestes
  • † Gallolestes agujaensis – type locality for species
• † Garramites
  • † Garramites nitidus
• Gastrochaena
• Gaudryina
  • † Gaudryina austinana
  • † Gaudryina cushmani
  • † Gaudryina ellisorae
• Gegania
  • † Gegania manzaneti
• † Geltena
  • † Geltena nitida
  • † Geltena obesa
  • † Geltena prunoides
  • † Geltena subcompressa
  • † Geltena subequilatera
  • † Geltena sybcompressa
• † Gerdalia
• 

  Fossilized shell of the Carboniferous-Eocene bivalve Gervillia
  † Gervillia
  • † Gervillia bryani
  • † Gervillia wellsi – tentative report
• † Gervilliopsis
  • † Gervilliopsis ensiformis
  • † Gervilliopsis ensiformis extensa
  • † Gervilliopsis invaginata
• Ginglymostoma
• † Glenrosa
  • † Glenrosa pagiophylloides
  • † Glenrosa texensis
• † Globator
  • † Globator vaughani – type locality for species
• 

  Illustration of a reconstructed skull of the Late Cretaceous mosasaur Globidens
  † Globidens
  • † Globidens dakotensis
• Globigerina
  • † Globigerina cretacea
  • † Globigerina washitaensis
• Glossus
  • † Glossus bulbosa
  • † Glossus hendersoni
  • † Glossus irelandi
  • † Glossus shumardi
  • † Glossus slatana
  • † Glossus slatana parva
• Glycymeris
  • † Glycymeris rotundata
  • † Glycymeris rotundata kaufmanensis
• 

  Fossilized skull and shell of the Late Jurassic-Early Cretaceous turtle Glyptops
  † Glyptops – tentative report
• † Glyptoxoceras
  • † Glyptoxoceras texanum
• † Gobiates
• † Goniochasma
  • † Goniochasma scaphoides
• † Goniocylichna
• † Goniophorus
  • † Goniophorus scotti
• † Graciliala
  • † Graciliala calcaris
  • † Graciliala cooki
  • † Graciliala johnsoni – tentative report
• † Grammatodon
  • † Grammatodon adkinsi
  • † Grammatodon bowiei
• † Granocardium
  • † Granocardium bowenae
  • † Granocardium conradi
  • † Granocardium deltanum
  • † Granocardium dumosum
  • † Granocardium kuemmeli
  • † Granocardium kummeli
  • † Granocardium lowei
  • † Granocardium rossae
  • † Granocardium tholi
  • † Granocardium tippananum
• † Graphidula
  • † Graphidula gabrielensis – tentative report
  • † Graphidula hoggi
  • † Graphidula lynnensis
  • † Graphidula multicostata
  • † Graphidula terebriformis
• † Graptocarcinus
  • † Graptocarcinus texanus
• † Graysonia
  • † Graysonia bergquisti
• † Graysonites
  • † Graysonites adkinsi
  • † Graysonites wacoense
• † Gryphaea
  • † Gryphaea aucella – or unidentified related form
  • † Gryphaea gibberosa
  • † Gryphaea marcoui
  • † Gryphaea pitcheri
  • † Gryphaea washitaensis
• † Gryphaeostrea
  • † Gryphaeostrea vomer
• 

  Restorative portrait of the Late Cretaceous duck-billed dinosaur Gryposaurus.
  † Gryposaurus – tentative report
  • † Gryposaurus alsatei
• † Guembelina
  • † Guembelina globulosa
  • † Guembelina paucistriata
• † Gumbelina
• † Gymnentome
  • † Gymnentome valida
  • † Gymnentome valida brevis
• † Gypsichnites
  • † Gypsichnites titanopelopatidus
• Gyrodes
  • † Gyrodes abyssinus
  • † Gyrodes americanus
  • † Gyrodes major
  • † Gyrodes petrosus
  • † Gyrodes rotundus
  • † Gyrodes spillmani
  • † Gyrodes subcarinatus
  • † Gyrodes supraplicatus
  • † Gyrodes tramitensis
• † Gyronchus
  • † Gyronchus dumblei
• † Gyrostrea
  • † Gyrostrea cortex

• 

  Shell of Haminoea bubble shell sea snail
  Haminoea – tentative report
  • † Haminoea simpsonensis
• † Hamites
• † Hamrabatis
  • † Hamrabatis weltoni – type locality for species
• † Hamulus
  • † Hamulus huntensis
  • † Hamulus onyx
  • † Hamulus squamosus
• † Haplostiche
  • † Haplostiche texana
• † Haplovoluta
  • † Haplovoluta bicarinata
• † Harduinia
  • † Harduinia bexari
  • † Harduinia dalli
  • † Harduinia mortonis
• † Helicoceras
  • † Helicoceras navarroense
• † Helopanoplia
• Hemiaster
  • † Hemiaster benhurensis
  • † Hemiaster bexari
  • † Hemiaster jacksoni
  • † Hemiaster sabinal – type locality for species
  • † Hemiaster texanus
  • † Hemiaster wetherbyi
• † Hemicalypterus – tentative report
  • † Hemicalypterus weiri
• Hemicerithium
  • † Hemicerithium insigne
  • † Hemicerithium interlineatum
• † Hercorhynchus
  • † Hercorhynchus malleiformis
• † Hercorhyncus
  • † Hercorhyncus coronale
  • † Hercorhyncus malleiformis
  • † Hercorhyncus mundum
  • † Hercorhyncus nodosum
  • † Hercorhyncus tippanus
  • † Hercorhyncus vadosum
• † Heterocoenia – tentative report
  • † Heterocoenia hilli – type locality for species
  • † Heterocoenia washitaensis – type locality for species
• Heterodontus
  • † Heterodontus granti – type locality for species
• † Heteromorpha
  • † Heteromorpha ammonite
• 

  Illustration of a living Hexanchus, or sixgill shark
  Hexanchus
• † Hillites
  • † Hillites multilirae
  • † Hillites septarianus
• † Hindeastraea
  • † Hindeastraea discoidea
• † Holaster
  • † Holaster simplex
• † Holoclemensia – type locality for genus
  • † Holoclemensia texana – type locality for species
• 

  Fossil of the Late Cretaceous lobster Hoploparia bearpawensis
  Homarus
  • † Homarus brittonetris
  • † Homarus davisi
  • † Homarus travisensis
• † Homoeosolen
• † Homomya
  • † Homomya thrusheri – tentative report
• † Hoplochelys
• † Hoploscaphites
  • † Hoploscaphites pumilis
• † Huetamia
  • † Huetamia buitronae
• 

  Life restoration of two of the Permian-Late Cretaceous cartilaginous fish Hybodus
  --> † Hybodus
  • † Hybodus brevicostatus – or unidentified comparable form
  • † Hybodus butleri – type locality for species
• † Hydnophora – tentative report
  • † Hydnophora styriaca – type locality for species
• † Hydrotribulus
  • † Hydrotribulus asper
• † Hylaeobatis – or unidentified comparable form
  • † Hylaeobatis ornata
• † Hypacanthoplites
  • † Hypacanthoplites bakeri
  • † Hypacanthoplites chihuahuaensis
  • † Hypacanthoplites cragini
  • † Hypacanthoplites quitmanensis
  • † Hypacanthoplites rugosus
  • † Hypacanthoplites sellardsi
  • † Hypacanthoplites umbilicostatus
• † Hypolophus
  • † Hypolophus mcnultyi – type locality for species
• † Hypophylloceras
  • † Hypophylloceras tanit – or unidentified comparable form
• † Hypoturrilites
  • † Hypoturrilites youngi

• † Ichthyodectes
• 

  Restoration of the Late Cretaceous toothed bird Ichthyornis
  † Ichthyornis
  • † Ichthyornis dispar
• † Idoceras
  • † Idoceras clarki
  • † Idoceras schucherti
• † Iguanodon – or unidentified comparable form
• 

  Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size
  † Inoceramus
  • † Inoceramus anomalus – or unidentified comparable form
  • † Inoceramus arnoldi
  • † Inoceramus arvanus
  • † Inoceramus balticus
  • † Inoceramus biconstrictus
  • † Inoceramus cordiformis – or unidentified comparable form
  • † Inoceramus cummingsi
  • † Inoceramus deformis
  • † Inoceramus dimidius
  • † Inoceramus eulessanus
  • † Inoceramus fragilis
  • † Inoceramus prefragilis
  • † Inoceramus vanuxemi – tentative report
• † Irenesauripus
  • † Irenesauripus glenrosensis
• † Isastrea
  • † Isastrea whitneyi – type locality for species
• † Ischyrhiza
  • † Ischyrhiza avonicola
  • † Ischyrhiza mira
  • † Ischyrhiza monasterica – type locality for species
• † Isomicraster
  • † Isomicraster danei
  • † Isomicraster rossi – type locality for species

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Jeletzkytes
  † Jeletzkytes
  • † Jeletzkytes brevis
• Juliacorbula
  • † Juliacorbula linteroidea
  • † Juliacorbula monmouthensis

• † Kamerunoceras
  • † Kamerunoceras calvertense
  • † Kamerunoceras eschii – or unidentified comparable form
• † Kasanskyella
  • † Kasanskyella cuchillensis – tentative report
  • † Kasanskyella fosteri
  • † Kasanskyella spathi
  • † Kasanskyella whitneyi – tentative report
• † Kazanskyella
  • † Kazanskyella cuchillense
  • † Kazanskyella fosteri
  • † Kazanskyella minima
  • † Kazanskyella trinitensis
  • † Kazanskyella whitneyi
• † Kermackia – type locality for genus
  • † Kermackia texana – type locality for species
• † Kimbleia
  • † Kimbleia albrittoni
  • † Kimbleia capacis
• † Koskinonodon – type locality for genus
  • † Koskinonodon perfectus – type locality for species
• 

  Life restoration of the Late Cretaceous duck-billed dinosaur Kritosaurus
  † Kritosaurus

• † Laevigyra
  • † Laevigyra dhondtae
• † Lamellaerhynchia
  • † Lamellaerhynchia indi – type locality for species
  • † Lamellaerhynchia viae – type locality for species
• 

  A modern Lamna mackerel shark
  Lamna
  • † Lamna sulcata – or unidentified related form
• † Lanieria
  • † Lanieria uvaldana – type locality for species
• † Lasalichthys
  • † Lasalichthys hillsi
• Laternula
  • † Laternula bartoni
  • † Laternula johnsonana
  • † Laternula robusta
  • † Laternula sublevis
  • † Laternula sulcatina
  • † Laternula tofana
  • † Laternula virgata
• † Latiala
  • † Latiala lobata
• † Latiastrea
  • † Latiastrea whitneyi
• 

  Shells in multiple views of Latiaxis coral sea snails
  Latiaxis
• † Latiscopus – type locality for genus
  • † Latiscopus disjunctus – type locality for species
• † Laxispira
  • † Laxispira lumbricalis
  • † Laxispira monilifera
• † Legumen
  • † Legumen ellipticum
  • † Legumen ligula
• Lenticulina
  • † Lenticulina cyprina
  • † Lenticulina gaultina
• † Lepidotes
• Lepisosteus
• † Leptarbacia
  • † Leptarbacia argutus
• Leptomaria
  • † Leptomaria austinensis
  • † Leptomaria robusta

Fossilized foot bones of the Late Cretaceous oviraptorosaur Leptorhynchos

† Leptorhynchos – type locality for genus

• • † Leptorhynchos gaddisi – type locality for species
• † Leptosolen
  • † Leptosolen angustus
  • † Leptosolen biplicata
  • † Leptosolen levis
  • † Leptosolen linguliformis
  • † Leptosolen quadrilaterus
  • † Leptosolen quadriliratus
• † Leptostyrax
  • † Leptostyrax bicuspidatus
  • † Leptostyrax macrorhiza
• 

  Fossilized skull of the Late Triassic phytosaur Leptosuchus
  † Leptosuchus
  • † Leptosuchus crosbiensis – type locality for species
  • † Leptosuchus imperfecta – type locality for species
  • † Leptosuchus studeri – type locality for species
• † Levicerithium
  • † Levicerithium altum
  • † Levicerithium basicostae
  • † Levicerithium breviforme
  • † Levicerithium microlirae – tentative report
  • † Levicerithium planum
  • † Levicerithium timberanum
• † Lewesiceras
• † Lewyites
  • † Lewyites clinensis
• † Leyvachelys
  • † Leyvachelys cipadi
• † Libognathus – type locality for genus
  • † Libognathus sheddi – type locality for species
• 

  Life restoration of the Late Cretaceous plesiosaur Libonectes with an anachronistic scuba diver to scale
  † Libonectes
  • † Libonectes morgani – type locality for species
• Lima
  • † Lima acutilineata texana
  • † Lima coahuilensis
  • † Lima cokei
  • † Lima deatsvillensis
  • † Lima generosa
  • † Lima geronimioensis
  • † Lima geronimoensis
  • † Lima guadalupensis
  • † Lima pelagica
  • † Lima wacoensis
• Limatula
  • † Limatula acutilineata
• Limea
  • † Limea reticulata
• Limopsis
  • † Limopsis meeki
• † Linearia
  • † Linearia crebelli
• † Linearis
  • † Linearis concentrica
  • † Linearis metastriata
  • † Linearis navarroana
  • † Linearis pectinis
  • † Linearis wieserae
• Lingula
  • † Lingula subspatulata
• † Linter
  • † Linter acutata
• † Linthia
  • † Linthia variabilis
• 

  A modern Linuparus spiny lobster
  Linuparus
  • † Linuparus adkinsi
  • † Linuparus grimmeri
  • † Linuparus watkinsi
• † Lioestheria – tentative report
• † Liopeplum
  • † Liopeplum cretaceum
  • † Liopeplum eiodermum
  • † Liopeplum leioderma
  • † Liopeplum leioderma breve
  • † Liopeplum leioderma longum
  • † Liopeplum leioderma tabulatum
  • † Liopeplum rugosum
• † Liopistha
  • † Liopistha alternata
  • † Liopistha formosa
  • † Liopistha protexta
• † Liothyris
  • † Liothyris carolinensis – or unidentified comparable form
  • † Liothyris navarroana
• Liquidambar – tentative report
• † Lirosoma
  • † Lirosoma cretacea
• † Lispodesthes
  • † Lispodesthes lirata
  • † Lispodesthes panda
  • † Lispodesthes patula
• † Lissodus
  • † Lissodus babulski – or unidentified related form
• 

  Lithacoceras
  † Lithacoceras
  • † Lithacoceras malonianum
• Lithophaga
• † Lomirosa
  • † Lomirosa cretacea
• † Lonchidion
  • † Lonchidion anitae – type locality for species
  • † Lonchidion humblei – type locality for species
  • † Lonchidion selachos
• † Longoconcha
  • † Longoconcha dalli
  • † Longoconcha navarroensis
• 

  Mounted fossilized skeleton of the Late Triassic aetosaur Longosuchus
  † Longosuchus
  • † Longosuchus meadei – type locality for species
  • † Longosuchus meadi
• Lopha
  • † Lopha falcata
  • † Lopha mesenterica
  • † Lopha subovata
• † Loriolia
  • † Loriolia rosana
• † Lowenstamia
  • † Lowenstamia subplanus – or unidentified comparable form
• † Loxostomoides
  • † Loxostomoides cushmani
• † Lucasuchus – type locality for genus
  • † Lucasuchus hunti – type locality for species
• Lucina
  • † Lucina aspera
  • † Lucina chatfieldana
  • † Lucina dentonana
  • † Lucina glebula
  • † Lucina oleodorsum
  • † Lucina potosina
  • † Lucina seminolis
• † Luisogalathea
  • † Luisogalathea cretacea
• † Lupira
  • † Lupira pyriformis
• † Lutema
  • † Lutema geniculata
  • † Lutema hubbardi
  • † Lutema munda
  • † Lutema simpsonensis
• † Lycettia
  • † Lycettia tippana
  • † Lycettia tippanus
• † Lyriochlamys – tentative report

• † Macraster
  • † Macraster arguilera
  • † Macraster elegans
  • † Macraster nodopyda
• † Macrepistius
• † Macrocerithium
  • † Macrocerithium tramitense
• † Macromesodon
  • † Macromesodon dumblei
• † Magadiceramus
  • † Magadiceramus complicatus
  • † Magadiceramus crenelatus
  • † Magadiceramus crenistriatus – or unidentified comparable form
  • † Magadiceramus subquadratus
• † Magnoavipes – type locality for genus
  • † Magnoavipes lowei – type locality for species
• 

  Life restoration of the Late Triassic reptile Malerisaurus
  † Malerisaurus
• Malletia
  • † Malletia littlei
  • † Malletia longfrons
  • † Malletia longifrons
  • † Malletia stephensoni
• † Mammites
  • † Mammites powelli – type locality for species
• † Mantelliceras
  • † Mantelliceras cantianum
  • † Mantelliceras martimpreyi – or unidentified comparable form
  • † Mantelliceras saxbii
• † Margaritella
  • † Margaritella pumila
• 

  Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Mariella
  † Mariella
  • † Mariella bosquensis
  • † Mariella brazoensis
  • † Mariella camachoensis
  • † Mariella cenomanensis – or unidentified comparable form
  • † Mariella davisense
  • † Mariella rhacioformis
  • † Mariella wysogorskii
• † Mataxa
  • † Mataxa subteres
  • † Mataxa valida
  • † Mataxa valida multilirae
• † Mathilda
  • † Mathilda cedarensis
  • † Mathilda corona
• † Meandraraea
  • † Meandraraea plummeri – type locality for species
  • † Meandraraea tulae – or unidentified comparable form
• † Medionapus
  • † Medionapus elongatus
• Megalomphalus – or unidentified comparable form
• † Megalosauropus – tentative report
  • † Megalosauropus titanopelobatidus – type locality for species
• Melanatria
  • † Melanatria venusta
• † Melicertites
• Membranipora
• Membraniporidra
• † Menabites
  • † Menabites austinensis
  • † Menabites danei
  • † Menabites delawarensis
  • † Menabites vanuxemi
• 

  Fossilized skull of the Late Cretaceous multituberculate mammal Meniscoessus
  † Meniscoessus
• † Menuites
• Mesalia
  • † Mesalia shumardi
• † Mesodma
• † Mesomorpha
  • † Mesomorpha excavata
  • † Mesomorpha vaughani – type locality for species
• † Metengonoceras
  • † Metengonoceras acutum
  • † Metengonoceras ambiguum
  • † Metengonoceras bravoense
  • † Metengonoceras dumbli
  • † Metengonoceras inscriptum
• † Metoicoceras
  • † Metoicoceras crassicostae
  • † Metoicoceras geslinianum
  • † Metoicoceras latoventer
  • † Metoicoceras swallovi
  • † Metoicoceras swallovii
  • † Metoicoceras swallovii macrum
• 

  Life restoration of the Late Triassic amphibian Metoposaurus with an anachronistic human to scale
  † Metoposaurus
  • † Metoposaurus bakeri – type locality for species
  • † Metoposaurus fraasi
  • † Metoposaurus jonesi – type locality for species
  • † Metoposaurus perfecta
• † Mexicaprina
  • † Mexicaprina cornuta
• † Micrabacia
  • † Micrabacia marylandica
  • † Micrabacia radiata – type locality for species
• † Micraster
  • † Micraster americanus
  • † Micraster uddeni – type locality for species
• † Microsolena
  • † Microsolena texana – type locality for species
• † Microsulcatoceras
  • † Microsulcatoceras texanum – type locality for species
• † Miocardiopsis
  • † Miocardiopsis hendersoni
  • † Miocardiopsis shumardi
• 

  Fossilized shell of the Devonian-modern marine bivalve Modiolus, or horsemussel
  † Modiolus
  • † Modiolus sedesclaris
  • † Modiolus sedesclarus
  • † Modiolus sedisclarus
• Monodonta – tentative report
  • † Monodonta cancellosa
• † Monopleura – tentative report
• † Monroea
  • † Monroea castellana
• Montastrea
  • † Montastrea comalensis
  • † Montastrea edwardsensis – type locality for species
  • † Montastrea pecosensis – type locality for species
  • † Montastrea roemeriana – type locality for species
  • † Montastrea texana
  • † Montastrea travisensis
  • † Montastrea whitneyi
• † Morea
  • † Morea cancellaria
  • † Morea cancellaria corsicanensis
  • † Morea cancellaria crassa
  • † Morea marylandica
  • † Morea marylandica bella
  • † Morea marylandica languida
  • † Morea transenna
• † Moremanoceras
  • † Moremanoceras elgini
  • † Moremanoceras flexuosum – type locality for species
• † Morphastrea
  • † Morphastrea barcenai – or unidentified comparable form
• † Mortoniceras
  • † Mortoniceras austinensis
  • † Mortoniceras drakei
  • † Mortoniceras maxima
  • † Mortoniceras minima
  • † Mortoniceras perinflatum
  • † Mortoniceras rostratum
  • † Mortoniceras wintoni
• 

  Life restoration of two of the Late Cretaceous Mosasaurus
  † Mosasaurus
  • † Mosasaurus maximus
  • † Mosasaurus missouriensis – tentative report
• † Muensterella[5]
  • †Muensterella jillae – type locality for species[5]
• † Myobarbum
  • † Myobarbum laevigatum
• † Myriophyllia – tentative report
  • † Myriophyllia dumblei – type locality for species
• Myrtea
  • † Myrtea stephensoni
• † Mytiloides
  • † Mytiloides columbianus
• † Mytilus

• † Naomichelys
• † Napulus
  • † Napulus octoliratus
  • † Napulus tuberculatus
• 

  Multiple views of a fossilized shell belonging to a Natica moon snail
  Natica
  • † Natica dorothiensis
  • † Natica humilis
  • † Natica rivulana
  • † Natica striaticostata
• Nebrius
• † Neithea
  • † Neithea bexarensis
  • † Neithea quinquecostata
• † Nelltia
  • † Nelltia stenzeli
• † Nemocardium
  • † Nemocardium fragile
  • † Nemocardium guadalupense
  • † Nemocardium marcosensis
  • † Nemocardium tenue
• † Nemodon
  • † Nemodon adkinsi
  • † Nemodon bowiei
  • † Nemodon eufalensis
  • † Nemodon eufaulensis
  • † Nemodon eufaulensis lineatus
  • † Nemodon grandis
  • † Nemodon grandis navarroanus
  • † Nemodon martindalensis
  • † Nemodon navarroanus
  • † Nemodon punctus
• † Neobrites
  • † Neobrites nodocostatus
• † Neocardioceras
  • † Neocardioceras juddii
• † Neodeshayesites
  • † Neodeshayesites comalensis
  • † Neodeshayesites mayfieldensis
• † Neogauthiericeras
  • † Neogauthiericeras zafimahovai
• 

  Opalized guard of the belemnoid cephalopod Neohibolites
  † Neohibolites
• † Neophlycticeras
  • † Neophlycticeras archerae – type locality for species
  • † Neophlycticeras blancheti – or unidentified comparable form
  • † Neophlycticeras fascicostatum – type locality for species
  • † Neophlycticeras roemeri
  • † Neophlycticeras texanum
• † Neoptychites
• † Nerinea – tentative report
• Nerita
  • † Nerita ornata
  • † Nerita semilevis
• 

  Living Neritina or nerite snails
  Neritina
  • † Neritina ambrosana
  • † Neritina insolita
• Nodosaria
  • † Nodosaria barkeri
• † Nonactaeonina
  • † Nonactaeonina deflexa
  • † Nonactaeonina graphoides
  • † Nonactaeonina tensa
  • † Nonactaeonina triticea
• † Nonaphalagodus – type locality for genus
  • † Nonaphalagodus trinitiensis – type locality for species
• 

  Restoration of several species of the Late Cretaceous ammonoid cephalopod Nostoceras
  † Nostoceras
  • † Nostoceras approximans
  • † Nostoceras colubriformis
  • † Nostoceras draconsis
  • † Nostoceras helicinum crassum
  • † Nostoceras helicinum humile
  • † Nostoceras helicinus
  • † Nostoceras hyatti
  • † Nostoceras splendidum
  • † Nostoceras stantoni aberrans
  • † Nostoceras stantoni prematurum
• † Notodonax
• † Notopoides – tentative report
  • † Notopoides pflugervillensis – type locality for species
• † Nucleopygus
  • † Nucleopygus texanus
• 

  Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula
  Nucula
  • † Nucula camia
  • † Nucula chatfieldensis
  • † Nucula chatsfieldensis
  • † Nucula ciboloensis
  • † Nucula cuneifrons
  • † Nucula microstriata
  • † Nucula nacatochana
  • † Nucula percrassa
  • † Nucula perequalis
  • † Nucula rivulana
  • † Nucula stantoni
  • † Nucula waltonensis
• Nuculana
  • † Nuculana coloradoensis
  • † Nuculana corbetensis
  • † Nuculana corsicana
  • † Nuculana houstoni
  • † Nuculana mutuata
  • † Nuculana protexta
  • † Nuculana rostratruncata
  • † Nuculana travisana
  • † Nuculana whitfieldi
• † Nudivagus – tentative report
• † Nymphalucina
  • † Nymphalucina linearia
  • † Nymphalucina parva
• † Nyssa

• † Odaxosaurus
  • † Odaxosaurus piger
• 

  A living Odontaspis sand shark
  Odontaspis
  • † Odontaspis aculeatus
• † Ogilviastraea – tentative report
  • † Ogilviastraea richardsi – type locality for species
• † Oklatheridium
  • † Oklatheridium minax
  • † Oklatheridium szalayi
• † Oligoptycha
  • † Oligoptycha americana – tentative report
• † Onchopristis
  • † Onchopristis dunklei
• 

  Fossilized vertebrae of the Cretaceous sawfish Onchosaurus
  † Onchosaurus
• † Opertochasma
  • † Opertochasma scaphoides
  • † Opertochasma subconicum
  • † Opertochasma venustum
• † Ophiomorpha
• † Ophiopsis – tentative report
• Ophiura
  • † Ophiura graysonensis
  • † Ophiura texana
  • † Ophiura travisana – type locality for species
• † Opis
  • † Opis elevata – tentative report
• 

  Life restoration of the Late Cretaceous ostrich dinosaur Ornithomimus
  † Ornithomimus
• † Ornopsis
  • † Ornopsis digressa
  • † Ornopsis maxeyi
  • † Ornopsis pulchra
  • † Ornopsis solistella
• † Ostlingoceras
  • † Ostlingoceras brandi
• 

  Shell of an Ostrea, or oyster
  Ostrea
  • † Ostrea alternans
  • † Ostrea bella
  • † Ostrea beloiti
  • † Ostrea carica
  • † Ostrea carinata – or unidentified related form
  • † Ostrea crenulimargo
  • † Ostrea leveretti
  • † Ostrea lugubris
  • † Ostrea owenana
  • † Ostrea panda
  • † Ostrea rubradiata
  • † Ostrea soleniscus
  • † Ostrea subovata
  • † Ostrea subradiata
• † Otischalkia – type locality for genus
  • † Otischalkia elderae – type locality for species
• † Ovalastrea – type locality for genus
  • † Ovalastrea fredericksburgensis – type locality for species
  • † Ovalastrea pecosensis – type locality for species
• † Oxyrhina
  • † Oxyrhina extenta
• † Oxytropidoceras
  • † Oxytropidoceras acuticarinatum
  • † Oxytropidoceras acutocarinatum
  • † Oxytropidoceras bravoensis
  • † Oxytropidoceras carbonarium
  • † Oxytropidoceras diazi
  • † Oxytropidoceras moorei
  • † Oxytropidoceras multifidum
  • † Oxytropidoceras pandalense – or unidentified comparable form
  • † Oxytropidoceras powelli
  • † Oxytropidoceras salasi
  • † Oxytropidoceras stenzeli
  • † Oxytropidoceras supani
  • † Oxytropidoceras texanum
  • † Oxytropidoceras uddeni

• † Pachycheilosuchus – type locality for genus
  • † Pachycheilosuchus trinquei – type locality for species
• † Pachydesmoceras
• † Pachydiscus
  • † Pachydiscus arkansanus
  • † Pachydiscus paulsoni
  • † Pachydiscus scotti
  • † Pachydiscus travisi
• 

  Restorative portrait of the Early Jurassic synapsid (mammal precursor) Pachygenelus
  † Pachygenelus
  • † Pachygenelus milleri – type locality for species
• † Pachymelania
• † Pachymya
• Pagurus
  • † Pagurus travisensis
• † Paladmete
  • † Paladmete alta
  • † Paladmete cancellaria
  • † Paladmete cancelleria
  • † Paladmete corbuliformis
  • † Paladmete elegans
  • † Paladmete gardnerae
  • † Paladmete inequalis
• 

  Fossilized skeleton of the Early Cretaceous-Eocene bony fish Palaeobalistum
  † Palaeobalistum
  • † Palaeobalistum geiseri – type locality for species
  • † Palaeobalistum rectidens – type locality for species
• † Palaeoctonus
  • † Palaeoctonus dumblianus – type locality for species
  • † Palaeoctonus orthodon – type locality for species
• † Palaeocypraea
  • † Palaeocypraea corsicanana
  • † Palaeocypraea nuciformis
• † Palaeogaleus
  • † Palaeogaleus navarroensis – type locality for species
• † Paleollanosaurus – type locality for genus
  • † Paleollanosaurus fraseri – type locality for species
• † Paleomolops
  • † Paleomolops langstoni – type locality for species
• † Paleopsephaea
  • † Paleopsephaea decorosa
  • † Paleopsephaea patens
  • † Paleopsephaea sinuosa
  • † Paleopsephaea vadoana
• 

  Life restoration of the Late Triassic phytosaur Paleorhinus
  † Paleorhinus
  • † Paleorhinus sawini – type locality for species
• † Paluxysuchus – type locality for genus
  • † Paluxysuchus newmani – type locality for species
• † Panis
  • † Panis cuneiformis
• Panopea
  • † Panopea anacachoensis – type locality for species
  • † Panopea subplicata
• † Pantojaloria
  • † Pantojaloria sphaerica
• † Pappotherium – type locality for genus
  • † Pappotherium pattersoni – type locality for species
• † Paracimexomys
• Paracyprideis
  • † Paracyprideis graysonensis
• Paracypris
  • † Paracypris alta
• † Parafusus – tentative report
• † Parahoplites
  • † Parahoplites thomasi
  • † Parahoplites wintoni
• † Paraisurus
  • † Paraisurus compressus
• † Paramicrodon – type locality for genus
  • † Paramicrodon estesi – type locality for species
• † Parandiceras
  • † Parandiceras indicum – or unidentified comparable form
• † Paranecrocarcinus
  • † Paranecrocarcinus moseleyi
• † Paranecrocarinus
  • † Paranecrocarinus ovalis
• † Paranomia
  • † Paranomia scabra
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Parapuzosia with a human indicating its size
  † Parapuzosia
  • † Parapuzosia americana – type locality for species
  • † Parapuzosia bosei – type locality for species
  • † Parapuzosia sealei – type locality for species
• † Parasaniwa – or unidentified comparable form
  • † Parasaniwa wyomingensis
• Parasmilia
  • † Parasmilia austinensis
  • † Parasmilia bullardi – type locality for species
  • † Parasmilia graysonensis – type locality for species
• † Parasuchus
  • † Parasuchus bransoni
• 

  Mounted fossilized skeleton of the Late Triassic aetosaur Paratypothorax
  † Paratypothorax
• † Paraxiopsis
  • † Paraxiopsis erugatus
• † Parengonoceras
  • † Parengonoceras roemeri
• † Parmicorbula
  • † Parmicorbula corneliana
  • † Parmicorbula hillensis
  • † Parmicorbula numerosa
  • † Parmicorbula rupana
  • † Parmicorbula sinuosa
  • † Parmicorbula suffalciata
  • † Parmicorbula terramaria
  • † Parmicorbula vokesi
• † Paronychodon
  • † Paronychodon lacustris – or unidentified comparable form
• Parvamussium
  • † Parvamussium danei
• † Parvivoluta – tentative report
• Patellina
  • † Patellina subcretacea
• 

  Fossilized skull in multiple views of the Early Cretaceous armored dinosaur Pawpawsaurus
  † Pawpawsaurus – type locality for genus
  • † Pawpawsaurus campbelli – type locality for species
• † Pecten
  • † Pecten bellula
  • † Pecten bellulus
  • † Pecten catherina
  • † Pecten georgetownensis
  • † Pecten moodyi
  • † Pecten subalpinus
  • † Pecten texanus
  • † Pecten venustus
  • † Pecten wrighti
• † Pedinopsis
  • † Pedinopsis pondi
• † Peilinia
  • † Peilinia quadriplicata
• † Pekinosaurus – or unidentified related form
  • † Pekinosaurus olseni
• † Peneteius
• Periploma
  • † Periploma edwardsi
• † Periplomya
  • † Periplomya sulcatina
• Perna – report made of unidentified related form or using admittedly obsolete nomenclature
  • † Perna texana
• † Perrisonota
  • † Perrisonota littlei
  • † Perrisonota protexta
• Petrophyllia
• † Phacellocoenia – tentative report
  • † Phacellocoenia tolmachoffana – type locality for species
• Phacoides
  • † Phacoides mattiformis
• † Pharodina
  • † Pharodina ferrana
• † Phelopteria
  • † Phelopteria dalli
  • † Phelopteria linguaeformis
  • † Phelopteria timberensis
• Pholadidea
  • † Pholadidea ragsdalensis
• 

  Fossilized shell of the Early Triassic-Pliocene marine bivalve Pholadomya
  Pholadomya
  • † Pholadomya coahuilensis
  • † Pholadomya goldenensis
  • † Pholadomya ingens
  • † Pholadomya littlei
  • † Pholadomya occidentalis
  • † Pholadomya shattucki
• Pholas
  • † Pholas scaphoides
• † Phyllobrissus
  • † Phyllobrissus cubensis
• 

  Phymosoma
  † Phymosoma
  • † Phymosoma hilli
• † Phytosaurus
• † Piestochilus
  • † Piestochilus curviliratus
  • † Piestochilus levis
• †Pinella
  • † Pinella reticulata
• † Pinna
  • † Pinna laqueata
• † Pirsila
  • † Pirsila decora
  • † Pirsila simpla
  • † Pirsila tensa
• Pitar
  • † Pitar yoakumi
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Placenticeras
  † Placenticeras
  • † Placenticeras interealare
  • † Placenticeras meeki
  • † Placenticeras syrtale
• Placopsilina
  • † Placopsilina minima
• † Placotrochus
  • † Placotrochus texanus
• Plagioecia
• † Planocephalosaurus
  • † Planocephalosaurus lucasi – type locality for species
• Planulina
  • † Planulina eaglefordensis
• 

  Restoration of the Late Cretaceous mosasaur Platecarpus
  † Platecarpus
  • † Platecarpus planifrons
  • † Platecarpus somenensis – or unidentified comparable form
  • † Platecarpus tympaniticus
• † Platiknemiceras
  • † Platiknemiceras flexuosum
• † Platyceramus
  • † Platyceramus cycloides
  • † Platyceramus mantelli - or unidentified loosely related form
• 

  Life restoration of the Early-Late Cretaceous ichthyosaur Platypterygius
  † Platypterygius
• † Plesiacanthoceras
  • † Plesiacanthoceras bellsanum
• † Plesiosaurus
• † Pleuriocardia
  • † Pleuriocardia eufaulense
  • † Pleuriocardia eufaulensis huntanum
• † Pleurocora
  • † Pleurocora coalescens
• † Pleuromya
  • † Pleuromya inconstans
• † Pleurosmilia
  • † Pleurosmilia quaylei – type locality for species
  • † Pleurosmilia saxifisi – type locality for species
• 

  Fossilized shell of a Pleurotomaria slit snail
  Pleurotomaria
  • † Pleurotomaria macilenta
• † Plicatolamna – or unidentified comparable form
  • † Plicatolamna arcuata
• † Plicatoscyllium – type locality for genus
  • † Plicatoscyllium antiquum – type locality for species
  • † Plicatoscyllium derameei – type locality for species
• Plicatula
  • † Plicatula clarki
  • † Plicatula dentonensis
  • † Plicatula goldenana
  • † Plicatula incongrua
  • † Plicatula mullicaensis
  • † Plicatula tetrica
• † Plioaxius
  • † Plioaxius texensis
• 

  Life restoration of the Late Cretaceous mosasaur Plioplatecarpus
  † Plioplatecarpus – tentative report
• † Poecilocrinus
  • † Poecilocrinus dispandus
• Polinices
  • † Polinices kummeli
  • † Polinices stephensoni
• † Pollex
  • † Pollex angulatus
  • † Pollex obesus
• † Polyacrodus
  • † Polyacrodus parvidens – or unidentified related form
• † Polyptychodon
  • † Polyptychodon hudsoni – type locality for species
• † Polytremacis
  • † Polytremacis hancockensis – type locality for species
  • † Polytremacis urgonensis
• † Pontocyprella
  • † Pontocyprella alexanderi
• † Poposaurus
  • † Poposaurus gracilis
  • † Poposaurus langstoni
• † Porituberoolithus
• † Postligata
• 

  Restoration of the Late Triassic crocodile relative Postosuchus with an anachronistic human to scale
  † Postosuchus – type locality for genus
  • † Postosuchus kirkpatricki – type locality for species
• † Praeleda
  • † Praeleda compar
• † Prionocyclites
  • † Prionocyclites mite
• † Prionocyclus
  • † Prionocyclus albinus
  • † Prionocyclus hyatti
  • † Prionocyclus macombi
  • † Prionocyclus wyomingensis
• † Priontropis
  • † Priontropis woolgari – or unidentified related form
• † Priscomactra
  • † Priscomactra cymba
  • † Priscomactra munda
• † Procardia
  • † Procardia torta
• † Procheloniceras
  • † Procheloniceras albrechtiaustriae – or unidentified related form
• 

  Life restoration of the Late Cretaceous mosasaur Prognathodon preying upon an ammonoid cephalopod
  † Prognathodon – tentative report
• † Promystriosuchus – type locality for genus
  • † Promystriosuchus ehleri – type locality for species
• † Proraster
  • † Proraster dalli
• † Proscincetes
  • † Proscincetes texanus
• † Prosiren – type locality for genus
  • † Prosiren elinorae – type locality for species
• † Protarca
  • † Protarca tramitensis
• † Protecovasaurus – type locality for genus
  • † Protecovasaurus lucasi – type locality for species
• † Protexanites
  • † Protexanites planatus
• † Protoavis – type locality for genus
  • † Protoavis texensis – type locality for species
• † Protocallianassa
  • † Protocallianassa pleuralum – type locality for species
• † Protocardia
  • † Protocardia guadalupense
  • † Protocardia hillana
  • † Protocardia marcosensis
  • † Protocardia spillmani
  • † Protocardia texana
  • † Protocardia timberensis
  • † Protocardia torta
  • † Protocardia wadei
• † Protodonax
  • † Protodonax lingulatus
  • † Protodonax lingulatus tensus
  • † Protodonax robustus
• † Protohadros – type locality for genus
  • † Protohadros byrdi – type locality for species
• † Protoplatyrhina
  • † Protoplatyrhina renae
• 

  Life restoration of the Late Cretaceous bony fish Protosphyraena
  † Protosphyraena
• † Proxestops
• † Pseudananchys
  • † Pseudananchys stephensoni – type locality for species
• † Pseudaspidoceras
  • † Pseudaspidoceras flexuosum
• † Pseudocalycoceras
  • † Pseudocalycoceras angolaense
• † Pseudoclavulina
  • † Pseudoclavulina clavata
• † Pseudocoeniopsis – tentative report
  • † Pseudocoeniopsis wintoni – type locality for species
• 

  Fossilized teeth of the Cretaceous shark Pseudocorax
  † Pseudocorax
  • † Pseudocorax granti
• † Pseudogaudryinella
  • † Pseudogaudryinella capitosa
• † Pseudohypolophus
• † Pseudolimea
  • † Pseudolimea kimbroensis
  • † Pseudolimea reticulata
  • † Pseudolimea sellardsi
• Pseudomalaxis
  • † Pseudomalaxis patens
  • † Pseudomalaxis pateriformis
• 

  Fossilized shell of a Pseudomelania sea snail
  † Pseudomelania
  • † Pseudomelania basicostata
  • † Pseudomelania ferrata
  • † Pseudomelania roanokana
• † Pseudoncrocarcinus
  • † Pseudoncrocarcinus scotti
• † Pseudoperna
  • † Pseudoperna congesta
• † Pseudopetalodontia
  • † Pseudopetalodontia felixi
• † Pseudoptera
  • † Pseudoptera hornensis
  • † Pseudoptera hornesis
  • † Pseudoptera rushana
  • † Pseudoptera serrata
  • † Pseudoptera viana
• † Psilomya
  • † Psilomya concentrica
  • † Psilomya levis
• 

  Life restoration of the Late Cretaceous pterosaur Pteranodon
  † Pteranodon – or unidentified comparable form
• † Pteria
  • † Pteria linguaeformis – tentative report
  • † Pteria rhombica
• † Pterocerella
  • † Pterocerella densatus
  • † Pterocerella densatus nacatochanus
  • † Pterocerella poinsettiformis
  • † Pterocerella robustus
• † Pterot
  • † Pterot castrovillensis – or unidentified related form
• 

  Fossilized shell of the Jurassic-Cretaceous marine bivalve Pterotrigonia
  † Pterotrigonia
  • † Pterotrigonia castrovillensis
  • † Pterotrigonia eufalensis
  • † Pterotrigonia eufaulensis
  • † Pterotrigonia eufaulensis gabbi
  • † Pterotrigonia marionensis
  • † Pterotrigonia stantoni
• † Ptychomya
  • † Ptychomya stantonii
• † Ptychotrygon
  • † Ptychotrygon vermiculata
  • † Ptychotrygon winni – type locality for species
• † Pugnellus
  • † Pugnellus densatus
  • † Pugnellus goldmani
• 

  Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Puzosia
  † Puzosia
  • † Puzosia crebrisulcata – or unidentified comparable form
• Pycnodonte
  • † Pycnodonte belli
  • † Pycnodonte mutabilis
  • † Pycnodonte vesicularis
• † Pycnomicrodon
  • † Pycnomicrodon texanus
• † Pyrgulifera
  • † Pyrgulifera costata
  • † Pyrgulifera costata sublevis
  • † Pyrgulifera costata tuberata
  • † Pyrgulifera ornata
• † Pyrifusus
• † Pyrina
  • † Pyrina parryi
• † Pyropsis
  • † Pyropsis lanhami
  • † Pyropsis proxima – or unidentified related form

• † Quayia – or unidentified comparable form
  • † Quayia zideki
• 

  Mounted fossilized skeleton of the Late Cretaceous pterosaur Quetzalcoatlus
  † Quetzalcoatlus – type locality for genus
  • † Quetzalcoatlus northropi – type locality for species
• † Quitmaniceras
  • † Quitmaniceras reaseri
• † Quitmanites
  • † Quitmanites ceratitosus
  • † Quitmanites evolutus

• † Rachiosoma
  • † Rachiosoma hondoensis – type locality for species
• † Radiopecten
  • † Radiopecten mississippiensis
• Raja
  • † Raja farishi – type locality for species
• † Ramsetia
  • † Ramsetia whitfieldi
• † Raninella
• † Remera
  • † Remera decora
  • † Remera juncea
  • † Remera microstriata
• † Remnita
  • † Remnita anomalocostata
  • † Remnita biacuminata
• † Remondia
  • † Remondia robbinsi
• Reophax
  • † Reophax deckeri
• † Reptomulticava
• † Restes
• † Rewaconodon – or unidentified related form
  • † Rewaconodon tikiensis
• † Rhamphidoceras – type locality for genus
  • † Rhamphidoceras saxatilis – type locality for species
• Rhinobatos
  • † Rhinobatos craddocki – type locality for species
  • † Rhinobatos uvulatus – type locality for species
• 

  Restoration of the Late Cretaceous-Paleocene ray Rhombodus
  † Rhombodus
  • † Rhombodus binkhorsti
• † Rhytidohoplites
  • † Rhytidohoplites robertsi
• † Rhytophorus – tentative report
• † Richardoestesia
  • † Richardoestesia gilmorei
  • † Richardoestesia isosceles – type locality for species
• † Rileymillerus – type locality for genus
  • † Rileymillerus cosgriffi – type locality for species
• 

  A living Ringicula sea snail
  Ringicula
  • † Ringicula anfractoline
  • † Ringicula arlingtonensis
  • † Ringicula culbertsoni
  • † Ringicula pulchella
  • † Ringicula sufflata
• Rogerella
  • † Rogerella cragini – type locality for species
• † Romaniceras
  • † Romaniceras aguilerai
  • † Romaniceras zacatecana
• Rostellaria – tentative report
  • † Rostellaria robertsi
• † Russellosaurus – type locality for genus
  • † Russellosaurus coheni – type locality for species
• 

  Life restoration of the Late Triassic phytosaur Rutiodon
  † Rutiodon