This list of the Paleozoic life of Oklahoma contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Oklahoma and are between 541 and 252.17 million years of age.

A

• † Abludoglyptocrinus
• † Abyssocrinus
  • † Abyssocrinus antiquus
• † Abyssomedon – type locality for genus
  • † Abyssomedon williamsi – type locality for species
• † Acanthobolbina
  • † Acanthobolbina loeblichi
• † Acanthocladia
  • † Acanthocladia ouachitensis
• † Acanthocrania
  • † Acanthocrania erecta
  • † Acanthocrania oklahomensis
  • † Acanthocrania subquadrata
• † Acanthopecten
  • † Acanthopecten grandis – type locality for species
• † Acanthospirina
• † Acanthotriletes
• † Acheloma
  • † Acheloma cumminsi – or unidentified comparable form
  • † Acheloma dunni – type locality for species
• † Acidiphorus
  • † Acidiphorus williamsi – or unidentified comparable form

• 

  † Acleistorhinus – type locality for genus
  • † Acleistorhinus pteroticus – type locality for species
• † Acolocrinus
  • † Acolocrinus crinerensis
• † Actinotodissus
  • † Actinotodissus longitaleosus
• † Adairia
  • † Adairia adairensis – type locality for species
• † Adornofusa
  • † Adornofusa microhapsis
• † Aechmina
  • † Aechmina geneae
  • † Aechmina longispina
  • † Aechmina truncata – tentative report
• † Aechminaria
  • † Aechminaria ambigua
  • † Aechminaria longispina
  • † Aechminaria truncata – tentative report
• † Aechminella
  • † Aechminella buchanani – type locality for species
  • † Aechminella trispinosa – type locality for species
• † Affinocrinus
  • † Affinocrinus grandis – type locality for species
  • † Affinocrinus normalis
  • † Affinocrinus orbis – type locality for species
  • † Affinocrinus politus – type locality for species
  • † Affinocrinus progressus – type locality for species
• † Alatisporites
  • † Alatisporites pustulatus
• † Albertoceras
  • † Albertoceras minimum
• † Alcimocrinus
  • † Alcimocrinus girtyi

• 

  † Alethopteris
  • † Alethopteris ambigua
  • † Alethopteris lesquereuxii
  • † Alethopteris serlii
  • † Alethopteris sullivantii
• † Alexandrinia
  • † Alexandrinia directa – type locality for species
• † Alisporites
  • † Alisporites aequus – type locality for species
  • † Alisporites zapfei
• † Allocrinus
  • † Allocrinus divergens
  • † Allocrinus globulus
  • † Allocrinus irroratus
• † Alloiopteris
• † Allorisma
  • † Allorisma albequus
  • † Allorisma maynardwhitei – type locality for species
  • † Allorisma snideri – type locality for species
• † Allotropiophyllum – or unidentified comparable form
• † Amarixys
  • † Amarixys gracilis
• † Amaurotoma – tentative report
  • † Amaurotoma knighti – type locality for species
• † Ameura
  • † Ameura major
• Ammobaculites
• Ammodiscus
• † Ammovertella
  • † Ammovertella inversa
• † Ampelocrinus
  • † Ampelocrinus convexus
• † Amphilichas
  • † Amphilichas subpunctatus
• † Amphipsalidocrinus
• † Amphiscapha
  • † Amphiscapha catilloides
• † Amphisella
• † Amphissites
  • † Amphissites bradfieldi – type locality for species
  • † Amphissites bushi – type locality for species
  • † Amphissites marginiferus
  • † Amphissites miseri – type locality for species
  • † Amphissites nodosus
  • † Amphissites rugosus
  • † Amphissites wapanuckensis
• † Amphistrophia
  • † Amphistrophia prolongata
• † Amsdenina
• † Amsdenoides
• † Amygdalocystites
  • † Amygdalocystites florealis
  • † Amygdalocystites tribrachiatus
• † Anabathra
  • † Anabathra pulcherrima
• † Anachoropteris
  • † Anachoropteris gillotii
  • † Anachoropteris involuta
• † Anachroropteris
  • † Anachroropteris involuta
• † Ananaspis
  • † Ananaspis guttulus
• † Anapiculatasporites
  • † Anapiculatasporites spinosus
• † Anapiculatisporites
  • † Anapiculatisporites edgarensis
  • † Anapiculatisporites spinosus
• † Anaplanisporites
• † Anasobella
• † Anastrophia
  • † Anastrophia delicata
  • † Anastrophia grossa – type locality for species
• † Anataphrus
  • † Anataphrus kermiti – type locality for species
• † Anatiferocystis
  • † Anatiferocystis papillata
• † Anchicrinus
  • † Anchicrinus echinosacculus – type locality for species
  • † Anchicrinus planulatus – type locality for species
  • † Anchicrinus rugosus
• † Ancistrorhyncha
  • † Ancistrorhyncha costata
  • † Ancistrorhyncha globularis
• † Ancoradella
  • † Ancoradella ploeckensis
• † Anematina
• † Angelosaurus
  • † Angelosaurus romeri – type locality for species
• † Anguisporites
  • † Anguisporites contortus – type locality for species
  • † Anguisporites intonsus – type locality for species
• † Anisophyllum

• 

  † Annularia
  • † Annularia sphenophylloides
  • † Annularia stellata
• † Anobasicrinus
  • † Anobasicrinus obscurus
• † Anolotichia
  • † Anolotichia deckeri
  • † Anolotichia impolita
  • † Anolotichia spinulifera
• † Anomalogramma
  • † Anomalogramma parva
• † Anomalohymen – type locality for genus
  • † Anomalohymen dochmus – type locality for species
• † Anomalorthis
  • † Anomalorthis oklahomensis
• † Anomphalus
• † Anthracoceras
  • † Anthracoceras oklahomense – type locality for species
• † Anthracocrinus
  • † Anthracocrinus primitivus
• † Anthraconeilo
  • † Anthraconeilo taffiana
• † Anthracospirifer
  • † Anthracospirifer opimus
• † Anthracotarbus – type locality for genus
  • † Anthracotarbus hintoni – type locality for species
• † Anthyrsis
• † Antiquatonia
• † Antirhynchonella
  • † Antirhynchonella thomasi
• † Anulocrinus
  • † Anulocrinus drummuckensis – or unidentified related form
• † Apachella
  • † Apachella capertoni – type locality for species
• † Aparchites
  • † Aparchites maccoyii
  • † Aparchites millepunctatus
  • † Aparchites perforata
• † Aphlebia
• † Apianurus
• † Apiculatasporites
  • † Apiculatasporites latigranifer
  • † Apiculatasporites setulosus
  • † Apiculatasporites spinulistratus
• † Apodasmocrinus
  • † Apodasmocrinus daubei
• † Apographiocrinus
• † Apotocardium
  • † Apotocardium lanterna
  • † Apotocardium plautum
• † Apsidoneura
  • † Apsidoneura flexa
• † Arakespongia – type locality for genus
  • † Arakespongia mega – type locality for species
• † Araucarites
• † Arbucklecystis

• 

  † Archaeocidaris
  • † Archaeocidaris megastyla
• † Archaeocrinus
  • † Archaeocrinus lacunosus – or unidentified comparable form
  • † Archaeocrinus subglobosus
  • † Archaeocrinus subovalis
• Archaeolithophyllum
• † Archaeophiomusium
  • † Archaeophiomusium burrisi
• † Archaeoscyphia
  • † Archaeoscyphia annulata
• † Archeria
  • † Archeria victori – type locality for species

• 

  † Archimedes
  • † Archimedes ardmorensis – type locality for species
  • † Archimedes distans
  • † Archimedes meekanoides
  • † Archimedes meekanus – or unidentified comparable form
  • † Archimedes perminimus – or unidentified related form
  • † Archimedes pitkinensis – type locality for species
  • † Archimedes pseudoswallovanus – type locality for species
  • † Archimedes sublaxus – or unidentified comparable form
• † Ardmosteges – type locality for genus
  • † Ardmosteges orchamus – type locality for species
• † Arkacrinus
  • † Arkacrinus constrictus – type locality for species
  • † Arkacrinus dubius
• † Arkanites
  • † Arkanites relictus
• † Arthropora
  • † Arthropora simplex
• † Artinska
  • † Artinska clara
  • † Artinska ovata
• † Asaphocrinus
  • † Asaphocrinus densus
• † Ascograptus
• † Asketopalla
  • † Asketopalla formosula
• † Aspidosaurus – or unidentified comparable form
• † Astartella
  • † Astartella concentrica
  • † Astartella vera
• † Asterophyllites
• † Asthenohymen
  • † Asthenohymen apicalis – type locality for species
  • † Asthenohymen latus – type locality for species
  • † Asthenohymen minutus – type locality for species
  • † Asthenohymen parvulus – type locality for species
  • † Asthenohymen triangularis – type locality for species
• † Astraeospongium
• † Astrocystites
• † Atactoporella
  • † Atactoporella bellula
• † Atelelasma
  • † Atelelasma oklahomense
• † Athlocrinus
  • † Athlocrinus dejustus – type locality for species
• † Athyris
• † Atokacrinus
  • † Atokacrinus tumulosus – type locality for species
• † Atrapocrinus – type locality for genus
  • † Atrapocrinus mutatus – type locality for species
• † Atribonium
  • † Atribonium evexum – or unidentified comparable form

• 

  † Atrypa
  • † Atrypa arctostriata
  • † Atrypa oklahomensis
  • † Atrypa tennesseensis
• † Atrypina
  • † Atrypina hami
• † Aulacotheca – or unidentified comparable form
• † Aurimorpha
  • † Aurimorpha varia
• † Auriptygma
• † Austinella
  • † Austinella multicostella

• 

  † Aviculopecten
  • † Aviculopecten halensis
  • † Aviculopecten multilineatus
  • † Aviculopecten nodocosta – type locality for species
  • † Aviculopecten tomlinsoni – type locality for species
• † Avonia – tentative report
  • † Avonia snideri – type locality for species
  • † Avonia spinosa – type locality for species
• † Axinolobus

B

• † Bactrites
  • † Bactrites smithianus
• † Bactrocrinites
  • † Bactrocrinites oklahomensis
• † Baeotherates – type locality for genus
  • † Baeotherates fortsillensis – type locality for species
• † Baiosoma
  • † Baiosoma batilia – type locality for species
• Bairdia
  • † Bairdia ardmorensis – type locality for species
  • † Bairdia billjohnsoni – type locality for species
  • † Bairdia croneisi – type locality for species
  • † Bairdia folgeri
  • † Bairdia forakerensis
  • † Bairdia multihilosa – type locality for species
• † Bairdiocypris
• † Bairdocypris – tentative report
  • † Bairdocypris transversus
• † Balticella
  • † Balticella deckeri
  • † Balticella elongata
• † Baltisphaeridium
  • † Baltisphaeridium accinctum
  • † Baltisphaeridium bystrentos
  • † Baltisphaeridium disparicanale
  • † Baltisphaeridium parvigranosum
  • † Baltisphaeridium trophirhapium
• † Barycrinus – tentative report
  • † Barycrinus herculeus – or unidentified related form
• † Bascomella
  • † Bascomella gigantea – or unidentified comparable form
• † Bathysiphon
• † Bathyurellus
  • † Bathyurellus arbucklensis
  • † Bathyurellus inflatus
• † Bathyurus
  • † Bathyurus superbus
• † Batostoma
  • † Batostoma chapparsi
  • † Batostoma chazyensis
  • † Batostoma cumingsi
  • † Batostoma ramosa
  • † Batostoma sheldonensis
  • † Batostoma winchelli
• † Beecheria
• † Beedeina
• † Bellazona
  • † Bellazona bella

• 

  † Bellerophon
  • † Bellerophon wewokanus
• † Bellimurina
  • † Bellimurina compressa
  • † Bellimurina subquadrata
• † Belodella
  • † Belodella silurica
• † Benthamaspis
  • † Benthamaspis mediacrista – or unidentified comparable form
  • † Benthamaspis onomeris
  • † Benthamaspis rhochmotis
• † Berestovia
• † Bicornella
  • † Bicornella tricornis
  • † Bicornella unicornis – type locality for species
• † Bigalea
• † Bilinguites
  • † Bilinguites eliasi – type locality for species
• † Bisatoceras – type locality for genus
  • † Bisatoceras primum – type locality for species
• † Bistomiacystis
• † Boesites
  • † Boesites girtyi
• † Bolbocephalus
  • † Bolbocephalus convexus – or unidentified comparable form
  • † Bolbocephalus jeffersonensis
  • † Bolbocephalus myktos
  • † Bolbocephalus stitti
• † Bollia

• 

  † Bolosaurus
  • † Bolosaurus grandis – type locality for species
  • † Bolosaurus striatus
• † Bolterpeton – type locality for genus
  • † Bolterpeton carrolli – type locality for species
• † Borestus
  • † Borestus pagoda – type locality for species
• † Bothriocidaris
• † Botryocrinus
  • † Botryocrinus parcus
• † Botryopteris
  • † Botryopteris forensis
  • † Botryopteris mediatena
  • † Botryopteris tridentata
• † Brabeocrinus
  • † Brabeocrinus primus – type locality for species
• † Brachydegma – tentative report
  • † Brachydegma caelatum
• † Brachymimulus
  • † Brachymimulus americanus
• † Brachyprion
  • † Brachyprion arata
  • † Brachyprion attenuata
  • † Brachyprion gibber
  • † Brachyprion gibbera – type locality for species
• † Brachythyris
  • † Brachythyris chouteauensis
• † Bradyina
• † Bransonella – type locality for genus
  • † Bransonella tridentata – type locality for species
• † Breileenia
  • † Breileenia minnewankensis
• † Brevilamnulella
  • † Brevilamnulella thebesensis
• † Bromidechinus – type locality for genus
  • † Bromidechinus rimaporus – type locality for species
• † Bromidella
  • † Bromidella reticulata
• † Bromidocrinus
• † Bromidocystis
• † Buckhornia
  • † Buckhornia carteri
• † Bumastoides
  • † Bumastoides milleri – or unidentified comparable form
• † Buxtonia
  • † Buxtonia incurvatus
  • † Buxtonia semicircularis
  • † Buxtonia suttoni – type locality for species
• Bythocypris
  • † Bythocypris cylindrica
  • † Bythocypris kershavii
  • † Bythocypris spinosa
  • † Bythocypris tomlinsoni
• † Bythopora
  • † Bythopora subgracilis

C

• 

  † Cacops
  • † Cacops morrisi – type locality for species
  • † Cacops woehri – type locality for species
• † Cadiospora
  • † Cadiospora magna
• † Caenanoplia
  • † Caenanoplia burlingtonensis
• † Calamaspora
  • † Calamaspora breviradiata – or unidentified comparable form

• 

  † Calamites
• † Calamospora
  • † Calamospora breviradiata
  • † Calamospora hartungiana
  • † Calamospora liquida
  • † Calamospora mutabilis
  • † Calamospora pedata
  • † Calamospora straminea
• † Calathium
• † Calceocrinus
  • † Calceocrinus humilis
• † Callipteris
• † Callistophyton
  • † Callistophyton boyssetii
• † Calohymen – type locality for genus
  • † Calohymen permianus – type locality for species
• † Calycocrinus
  • † Calycocrinus furnishi – type locality for species
  • † Calycocrinus symmetricus – type locality for species

• 

  † Calymene
  • † Calymene clavicula
• † Calyptaulax
  • † Calyptaulax annulata
• † Camarophorella
• † Camarotoechia
  • † Camarotoechia altisulcata
  • † Camarotoechia carmelensis
  • † Camarotoechia filistriata
  • † Camarotoechia haraganensis
  • † Camarotoechia oklahomensis
• † Camerate
• † Camerella
  • † Camerella anteroplicata
  • † Camerella oklahomensis
• † Camorphoria
• † Campbelloceras
• † Cancelloceras
  • † Cancelloceras huntsvillense – type locality for species
• † Cancrinella
  • † Cancrinella boonensis
• † Caneyella
• † Capnophyllum
• † Captorhinikos
  • † Captorhinikos chozaensis
  • † Captorhinikos parvus – type locality for species
  • † Captorhinikos valensis

• 

  † Captorhinus
  • † Captorhinus aguti
  • † Captorhinus kierani – type locality for species ^[1]
  • † Captorhinus laticeps – type locality for species
  • † Captorhinus magnus – type locality for species
• † Carabocrinus
  • † Carabocrinus loeblichi
  • † Carabocrinus logani
  • † Carabocrinus treadwelli
  • † Carabocrinus tumidus
  • † Carabocrinus vancortlandi – or unidentified comparable form
• † Carbonocoryphe
  • † Carbonocoryphe planucauda
• † Carboprimitia
  • † Carboprimitia rotunda – or unidentified comparable form

• 

  † Cardiocephalus
  • † Cardiocephalus peabodyi – type locality for species
  • † Cardiocephalus sternbergi – or unidentified comparable form
• † Cardiodella
  • † Cardiodella abbreviatus
  • † Cardiodella arcuatus
  • † Cardiodella densus
  • † Cardiodella robustus
• † Carolinites
  • † Carolinites sibiricus
• † Caryocaris – tentative report
• † Caryocrinites
• † Cavellina
  • † Cavellina lata
  • † Cavellina subovata
• † Cavernula
  • † Cavernula coccidia
  • † Cavernula pediculata
• † Centrotarphyceras
  • † Centrotarphyceras powersi
• † Ceramopora
  • † Ceramopora unapensis
• † Ceramoporella
  • † Ceramoporella ingenua
• † Ceratiocaris
• † Ceratocephala
  • † Ceratocephala graffhami
• † Ceratonurus
• † Ceratopea
• † Ceraurinella

• 

  † Ceraurus
  • † Ceraurus ruidus
• † Cerithioides – tentative report
  • † Cerithioides gleanensis
• † Chaenocardia
  • † Chaenocardia ovata
• † Chaetetes
  • † Chaetetes milleporaceus – or unidentified comparable form
• † Chaloneria
• † Champlainopora
  • † Champlainopora chazyensis
• † Chapmania
  • † Chapmania carterensis
  • † Chapmania oklahomensis
  • † Chapmania taylori
• † Chaulistomella
  • † Chaulistomella crassa
  • † Chaulistomella magna
  • † Chaulistomella mira
  • † Chaulistomella mundula
  • † Chaulistomella nitens
  • † Chaulistomella obesa
• † Cheirocrinus
• † Cheirocystis
  • † Cheirocystis ardmorensis

• 

  † Cheirurus
  • † Cheirurus infensus
  • † Cheirurus phollikodes – type locality for species
• † Chilotrypa
  • † Chilotrypa distans – type locality for species
• † Chlidochirus
• † Choctawites
  • † Choctawites choctawensis
• † Chonetes
  • † Chonetes decipiens
  • † Chonetes euampygus
  • † Chonetes kingi – type locality for species
  • † Chonetes mesoloba
• † Chonetinella
  • † Chonetinella flemingi – or unidentified comparable form
• † Cibecuia
  • † Cibecuia gouldii
• † Cibolocrinus
  • † Cibolocrinus bellus – type locality for species
  • † Cibolocrinus circulus – type locality for species
  • † Cibolocrinus spinosus – type locality for species
  • † Cibolocrinus tumidus
• † Cirratriradites
  • † Cirratriradites annulatus
  • † Cirratriradites annuliformis
  • † Cirratriradites maculatus
  • † Cirratriradites saturnii

• 

  † Cladochonus
• † Claritacarpus – type locality for genus
  • † Claritacarpus smithi – type locality for species
• † Clarkeolepis – type locality for genus
  • † Clarkeolepis clarkei – type locality for species
  • † Clarkeolepis elegans – type locality for species
• † Clathrocrinus
  • † Clathrocrinus grileyi – type locality for species
• † Clavasporites – type locality for genus
  • † Clavasporites irregularis – type locality for species
• † Clavatasporites
  • † Clavatasporites irregularis
• † Cleiocrinus
  • † Cleiocrinus bromidensis – type locality for species
  • † Cleiocrinus regius

• 

  † Cleiothyridina
  • † Cleiothyridina glenparkensis – or unidentified comparable form
  • † Cleiothyridina orbicularis
• † Cleithronetrum
  • † Cleithronetrum cancellatum
• † Cleithyridina
  • † Cleithyridina orbicularis
• † Clepsydrops
• † Climacammina
• Cliona
  • † Cliona fenestralis – type locality for species
  • † Cliona paleodendrica – type locality for species
  • † Cliona stellata – type locality for species
• † Clionolithes
  • † Clionolithes radicans – or unidentified comparable form
• † Coelochilina
  • † Coelochilina alata
• † Coelospira
  • † Coelospira concava
  • † Coelospira saffordi
  • † Coelospira virginia
• † Colaptomena
  • † Colaptomena bella
• † Coledium
  • † Coledium simulans

• 

  † Colobomycter – type locality for genus
  • † Colobomycter pholeter – type locality for species
  • † Colobomycter vaughni – type locality for species
• † Colpodecrinus
• † Complexisporites
  • † Complexisporites polymorphus
• † Composita
  • † Composita mexicana
  • † Composita rotunda
  • † Composita subcircularis
  • † Composita subtilita
  • † Composita wasatchensis
• Concavisporites
• † Concavissimisporites
• † Condracypris
  • † Condracypris binoda
  • † Condracypris coalensis – type locality for species
  • † Condracypris parallela
  • † Condracypris simplex
• † Condranema
  • † Condranema magna – or unidentified comparable form
• † Conularia
  • † Conularia crustula – or unidentified comparable form
• † Coolinia
  • † Coolinia reedsi
• † Cordania
  • † Cordania falcata
  • † Cordania wessmani
• † Cordylodus
• † Cornigella
  • † Cornigella pushmatahensis – type locality for species
• † Cornulites
  • † Cornulites inelegans
• Cornuspira
  • † Cornuspira semiconstrictus

• 

  † Cotylorhynchus – type locality for genus
  • † Cotylorhynchus bransoni – type locality for species
  • † Cotylorhynchus romeri – type locality for species
• † Cranaena
  • † Cranaena globosa
  • † Cranaena salinensis – type locality for species
• Crania
  • † Crania minuta – type locality for species
• † Craniops
  • † Craniops tenuis
• † Crassispora
  • † Crassispora kosankei
• † Cravenoceras
• † Cremacrinus
• † Cricotillus
  • † Cricotillus brachydens

• 

  † Cricotus
  • † Cricotus crassidiscus
• † Crinerocrinus
• † Crinisarina
  • † Crinisarina prouti
• † Crinoedischia
  • † Crinoedischia noblensis – type locality for species
• † Cromyocrinus
  • † Cromyocrinus grandis
• † Crossotelos – type locality for genus
  • † Crossotelos annulatus – type locality for species
• † Crurithyris
  • † Crurithyris planoconvexa
• † Cruruthyris
  • † Cruruthyris planoconvexa
• † Crustaesporites
  • † Crustaesporites globulus – tentative report
• † Cryptophyllus
  • † Cryptophyllus gibbosum
  • † Cryptophyllus nuculopsis
  • † Cryptophyllus simpsoni
• † Cryptothyrella – tentative report
  • † Cryptothyrella ovoides

• 

  † Ctenacanthus – report made of unidentified related form or using admittedly obsolete nomenclature
• † Ctenobolbina
  • † Ctenobolbina abrupta
  • † Ctenobolbina bispinata
  • † Ctenobolbina cancellata
  • † Ctenobolbina inflata
  • † Ctenobolbina parva
  • † Ctenobolbina percarinata
  • † Ctenobolbina varicata
• † Cullisonia
  • † Cullisonia producta
• † Curtognathus
  • † Curtognathus cordiformis
  • † Curtognathus coronata
  • † Curtognathus limitaris
• † Cyathocystis
  • † Cyathocystis oklahomae
• † Cybeloides
• † Cybelopsis
• † Cycadopites
• † Cyclites
  • † Cyclites depressus – type locality for species
• † Cyclobathmus
  • † Cyclobathmus haworthi – type locality for species
• † Cycloceras
  • † Cycloceras meeki – type locality for species
  • † Cycloceras randolphensis
• † Cyclocystoides
• † Cyclogranisporites
  • † Cyclogranisporites aureus
  • † Cyclogranisporites leopoldi
  • † Cyclogranisporites microgranus
  • † Cyclogranisporites minutus
  • † Cyclogranisporites obliquus
  • † Cyclogranisporites orbicularis
• † Cyclonema
• † Cycloplectoceras
  • † Cycloplectoceras miseri

• 

  † Cyclopteris
• † Cyclopuncta – type locality for genus
  • † Cyclopuncta girtyi – type locality for species
• † Cyclospira
  • † Cyclospira parva
• † Cyclozyga
  • † Cyclozyga neotenica – type locality for species
• † Cymatorhiza – type locality for genus
  • † Cymatorhiza kittsi – type locality for species
• † Cymatospira
  • † Cymatospira montfortianus

• 

  † Cyphaspis
  • † Cyphaspis carrolli
• † Cyphoneurodes
  • † Cyphoneurodes patriciae – type locality for species
• † Cypricardella – tentative report
  • † Cypricardella enigmatica – type locality for species
• † Cyrtina
  • † Cyrtina dalmani
• † Cyrtograptus
• † Cyrtorizoceras
• † Cystiphyllum
• † Cystodictya
  • † Cystodictya elegans – type locality for species

D

• † Dactylogonia
  • † Dactylogonia sculpturata
  • † Dactylogonia subaequicostellata
• † Dalejina
  • † Dalejina henryhousensis
  • † Dalejina subtriangularis
• † Dalmanella
  • † Dalmanella edgewoodensis

• 

  † Dalmanites
  • † Dalmanites ptyktorhion
  • † Dalmanites rutellum
• † Dapsilodus
  • † Dapsilodus obliquicostatus
  • † Dapsilodus praecipuus
  • † Dapsilodus sparsus
• † Decoriconus
  • † Decoriconus fragilis
• † Decoroproetus
  • † Decoroproetus anaglyptus
  • † Decoroproetus corycoeus
• † Dekayella
  • † Dekayella praenuntia
• † Delocrinus
  • † Delocrinus densus
  • † Delocrinus hemisphericus
  • † Delocrinus pentanodus – type locality for species
• † Deloia
  • † Deloia sulcata
• † Delopsocus
  • † Delopsocus elongatus
• † Delopterum
  • † Delopterum latum
  • † Delopterum minutum

• 

  † Delorhynchus – type locality for genus
  • † Delorhynchus cifellii – type locality for species
  • † Delorhynchus priscus – type locality for species
• † Delotaxis
• † Delthyris
  • † Delthyris kozlowskii
• † Deltoidospora
  • † Deltoidospora adnata
  • † Deltoidospora grandis
  • † Deltoidospora levis
  • † Deltoidospora priddyi
  • † Deltoidospora sphaerotriangula
  • † Deltoidospora subadnatoides
• † Dendrocrinus
  • † Dendrocrinus latibranchiatus – or unidentified comparable form
  • † Dendrocrinus rusticus
• † Densosporites
  • † Densosporites sphaerotriangularis
• † Derbyia
  • † Derbyia crassa – or unidentified comparable form
• † Derbyoides – or unidentified related form
• † Desmoinesia
  • † Desmoinesia muricatina
• † Desmorthis
• † Diabolocrinus
• † Diacalymene
  • † Diacalymene clavicula

• 

  † Diadectes
  • † Diadectes zenos
• † Dianulites
  • † Dianulites fastigiatus
  • † Dianulites petropolitana
• † Diaphoroceras
• † Diaphorodendron
  • † Diaphorodendron dicentricum
  • † Diaphorodendron scleroticum
• † Diaphragmus
  • † Diaphragmus fasciculatus
• † Dibunophyllum
  • † Dibunophyllum hansoni – type locality for species
• † Dicamaropsis
  • † Dicamaropsis parva
• † Dicellograptus
  • † Dicellograptus gurleyi
  • † Dicellograptus mensurans
• † Diceromyonia
  • † Diceromyonia tersa – or unidentified comparable form
• † Dichentomum
  • † Dichentomum tinctum
• † Dichognathus
  • † Dichognathus extensa
  • † Dichognathus typica
• † Dicoelosia
  • † Dicoelosia oklahomenesis – type locality for species
  • † Dicoelosia oklahomensis
  • † Dicoelosia varica
• † Dicranella
  • † Dicranella fragilis
  • † Dicranella macrocarinata

• 

  † Dicranurus
  • † Dicranurus elegantus
  • † Dicranurus hamatus
• † Dicromyocrinus
  • † Dicromyocrinus medius – type locality for species
  • † Dicromyocrinus optimus
  • † Dicromyocrinus subaplatus – type locality for species
• † Dictybolos – type locality for genus
  • † Dictybolos tener – type locality for species
• † Dictyoclostus
  • † Dictyoclostus ingrata – or unidentified related form
  • † Dictyoclostus mesialis
• † Dictyonema
  • † Dictyonema francesiae
  • † Dictyonema rockcrossingensis
• † Dictyospongia
• † Dielasma
  • † Dielasma oklahomensis – type locality for species
• † Dierespongia – type locality for genus
  • † Dierespongia palla – type locality for species
• † Dimeropygiella

• 

  † Dimetrodon
  • † Dimetrodon dollovianus
  • † Dimetrodon limbatus – or unidentified comparable form
  • † Dimetrodon loomisi
  • † Dimetrodon macrospondylus
• † Diphuicrinus
  • † Diphuicrinus croneisi
  • † Diphuicrinus dovelyensis
  • † Diphuicrinus faustus – type locality for species
  • † Diphuicrinus mammifer – type locality for species
  • † Diphuicrinus pentanodus – type locality for species

• 

  † Diplocaulus – type locality for genus
  • † Diplocaulus magnicornis
  • † Diplocaulus parvus – type locality for species
  • † Diplocaulus primus – type locality for species
• † Diplograptus
  • † Diplograptus maxwelli
• † Diplothmema
  • † Diplothmema pachyderma
• † Diplotrypa
  • † Diplotrypa bassleri
• † Discitoceras
• † Disparifusa
  • † Disparifusa hystricosa
• † Distacodus
  • † Distacodus oklahomensis – type locality for species
• † Ditaxineura
  • † Ditaxineura cellulosa
• † Ditoecholasma
• † Ditomopyge
  • † Ditomopyge parvulus – or unidentified comparable form
• † Dizygopleura
• † Doleotheca
• † Doleroides
  • † Doleroides compressus
  • † Doleroides oklahomensis
  • † Doleroides vescus
• † Dolerophyllum – tentative report
• † Dolerorthis
  • † Dolerorthis hami
  • † Dolerorthis nanella
  • † Dolerorthis savagei
• † Doleserpeton – type locality for genus
  • † Doleserpeton annectens – type locality for species
• † Dolichoharpes
  • † Dolichoharpes reticulata
• † Doliocrinus
• † Domatoceras
  • † Domatoceras collinsvillense – type locality for species
  • † Domatoceras williamsi
• † Donaldina
  • † Donaldina attenuata
  • † Donaldina grantonensis
• † Donezella
• † Donovaniconus
  • † Donovaniconus oklahomensis – type locality for species
• † Drepanoistodus
  • † Drepanoistodus suberectus
• † Dudleyaspis
• † Dunbarites
  • † Dunbarites rectilateralis
  • † Dunbarites wewokensis – type locality for species
• † Duncanella

E

• † Earlandinita
• † Eatonia
  • † Eatonia exserta
• † Ecculiomphalus – tentative report
• † Echinaria
• † Echinoconchus
  • † Echinoconchus elegans
• † Echinocrinus
  • † Echinocrinus cratis – or unidentified related form
• † Echinoencrinites – tentative report
  • † Echinoencrinites ornatus
• † Echinoprimitia
  • † Echinoprimitia imputata

• 

  † Echinosphaerites
  • † Echinosphaerites aurantium
• † Economolopsis
  • † Economolopsis anodontoides
• † Ectenaspis
  • † Ectenaspis burkhalteri – type locality for species
• † Ectenocrinus
• † Ectenoglossa – tentative report
  • † Ectenoglossa sculpta
• † Ectosteorhachis
  • † Ectosteorhachis nitidus – or unidentified comparable form

• 

  † Edaphosaurus
  • † Edaphosaurus cruciger
• † Edestus – type locality for genus
  • † Edestus vorax – type locality for species
• † Edmondia
  • † Edmondia rotunda – type locality for species
  • † Edmondia senilis – or unidentified comparable form
  • † Edmondia splendens – type locality for species
• † Edriocrinus
• † Edriophus
• † Ehlersia
• † Elibatocrinus
  • † Elibatocrinus elongatus – or unidentified comparable form
• † Elmoa
  • † Elmoa trisecta
• † Elpidocrinus
  • † Elpidocrinus tuberosus
• † Embolaster – type locality for genus
  • † Embolaster graffhami – type locality for species
• † Emilites
  • † Emilites bennisoni – type locality for species
• † Enchostoma – tentative report
  • † Enchostoma bicarinatum – or unidentified comparable form
• † Endelocrinus
  • † Endelocrinus matheri
• † Endosporites
  • † Endosporites globiformis
  • † Endosporites plicatus
  • † Endosporites zonalis
• † Endothyra
  • † Endothyra bowmani
• † Endothyranella
• † Enteletes
• † Entelophyllum
• † Enterolasma
• † Eoasianites
• † Eochiton
  • † Eochiton arbucklensis – type locality for species
• † Eochonetes
  • † Eochonetes magna
• † Eodictyonella (formerly Dictyonella)
  • † Eodictyonella gibbosa
• † Eohippioceras
  • † Eohippioceras ferratum
• † Eohollina
  • † Eohollina depressa
  • † Eohollina papillata
• † Eoleperditia
  • † Eoleperditia fabulites
  • † Eoleperditia inflativentralis
• † Eolissochonetes
• † Eomartiniopsis
  • † Eomartiniopsis rostrata
• † Eomonorachus
  • † Eomonorachus divaricatus
• † Eopinnacrinus
• † Eopleurophorus – type locality for genus
  • † Eopleurophorus immaturus
  • † Eopleurophorus spinulosa – or unidentified comparable form
• † Eoprimitia
  • † Eoprimitia bailyana
  • † Eoprimitia cooperi
  • † Eoprimitia quadrata
  • † Eoprimitia subnodosa
• † Eorobergia
  • † Eorobergia marginalis – or unidentified comparable form
• † Eoschistoceras
  • † Eoschistoceras strawnense
• † Eospirifer
  • † Eospirifer acutolineatus
• † Eotomaria
• † Ephedripites
  • † Ephedripites corrugatus – type locality for species
• † Epiphyton
• † Equisetites
• † Equisetosporites
• † Eridoconcha
  • † Eridoconcha magna
  • † Eridoconcha simpsoni
• † Eridopora
  • † Eridopora radiata
  • † Eridopora stellata
• † Eridotrypa
  • † Eridotrypa abrupta
• † Erismodus – tentative report
• † Erisocrinus
  • † Erisocrinus wapanucka

• 

  † Eryops
  • † Eryops megacephalus
• † Escharopora
  • † Escharopora recta
• † Estheria
• † Ethelocrinus – tentative report
  • † Ethelocrinus kirki

• 

  † Eucalyptocrinites
  • † Eucalyptocrinites pernodosus
• † Euchondria
  • † Euchondria subquadrata – type locality for species
• † Eucraterellina
  • † Eucraterellina oblonga
  • † Eucraterellina randolphi
  • † Eucraterellina spitznasi
• † Eucystis
• † Eudissoceras – type locality for genus
  • † Eudissoceras collinsvillense – type locality for species
• † Eukloedenella
• † Eumartynovia – type locality for genus
  • † Eumartynovia raaschi – type locality for species
• † Eumetria
  • † Eumetria deltoides – type locality for species
  • † Eumetria matheri – type locality for species
  • † Eumetria vera
  • † Eumetria verneuiliana
• † Eumorphoceras
  • † Eumorphoceras bisulcatum
  • † Eumorphoceras girtyi
• † Eumorphocystis
  • † Eumorphocystis multiporata
• † Euonychocrinus
• † Eupachycrinus
  • † Eupachycrinus magister – or unidentified comparable form
  • † Eupachycrinus verrucosus
• † Euphemites
  • † Euphemites carbonarius
  • † Euphemites compressus – type locality for species
• † Eurychilina
  • † Eurychilina papillata
  • † Eurychilina subradiata
  • † Eurychilina ventrosa
• † Eurygonum
  • † Eurygonum nodosum
• † Euryodus
  • † Euryodus dalyae – type locality for species
  • † Euryodus primus – or unidentified comparable form
• † Eusphenopteris
  • † Eusphenopteris scribanii-striata – informal
• † Euspirocrinus
  • † Euspirocrinus cirratus
• † Exocrinus
• † Exoriocrinus

F

• † Failleana
  • † Failleana limbata – or unidentified comparable form
• † Falcisporites
  • † Falcisporites zapfei
• † Fardenia
  • † Fardenia attenuata
  • † Fardenia reedsi
• † Fascichnus
  • † Fascichnus dactylus
  • † Fascichnus frutex
• † Fascifera
  • † Fascifera dalmanelloidea
• † Fastigatisporites
  • † Fastigatisporites physema – type locality for species
• † Favosites
• † Fayella – type locality for genus
  • † Fayella chickashaensis – type locality for species

• 

  † Feeserpeton – type locality for genus
  • † Feeserpeton oklahomensis – type locality for species
• † Fenestella
  • † Fenestella ardmorensis
  • † Fenestella bendensis – type locality for species
  • † Fenestella cestriensis
  • † Fenestella chesterensis – or unidentified comparable form
  • † Fenestella cumingsi
  • † Fenestella exigua
  • † Fenestella frutex – or unidentified comparable form
  • † Fenestella granularis – type locality for species
  • † Fenestella kosomensis – type locality for species
  • † Fenestella morrowensis
  • † Fenestella oklahomensis – type locality for species
  • † Fenestella ovatipora – type locality for species
  • † Fenestella paradisensis
  • † Fenestella rara – type locality for species
  • † Fenestella serratula
• † Fenesteverta – type locality for genus
  • † Fenesteverta nicklesi – type locality for species
• † Fernglenia
  • † Fernglenia vernonensis
• † Finkelnburgia
  • † Finkelnburgia crassicostata
• † Fistulipora
• † Flexifenestella
  • † Flexifenestella grandis – type locality for species
• † Florinites
  • † Florinites mediapudens
  • † Florinites millotti
  • † Florinites similis
  • † Florinites visendus
  • † Florinites volans
• † Foerstediscus
• † Foerstia
  • † Foerstia ohioensis
• † Fragiscutellum
  • † Fragiscutellum glebalis
• † Fragiscutum

• 

  † Frencrinuroides
  • † Frencrinuroides capitonis
• † Fusulina

G

• † Galateacrinus
• † Gardenasporites
  • † Gardenasporites heisselii
• † Garwoodia
• † Gastrioceras
  • † Gastrioceras adaense
  • † Gastrioceras fittsi
  • † Gastrioceras prone – type locality for species
  • † Gastrioceras retiferum – type locality for species
• † Gazacrinus
  • † Gazacrinus stellatus
• † Gelasinocephalus
  • † Gelasinocephalus pustulosus
  • † Gelasinocephalus whittingtoni
• † Geniculifera
  • † Geniculifera siphuncula – type locality for species
• † Gigagramma – type locality for genus
  • † Gigagramma carpenteri – type locality for species
• † Gigantopteris
  • † Gigantopteris americana
• † Girtycoelia
• † Girtyella
• † Girtyspira
  • † Girtyspira alvaensis – type locality for species
• † Girvanella
• † Gissocrinus
  • † Gissocrinus quadratus
• † Glabovalvulina – tentative report
• † Glabrocingulum
  • † Glabrocingulum grayvillense
  • † Glabrocingulum stellaeformis
  • † Glabrocingulum wannense – type locality for species
• † Glaphurochiton
• † Glaphyrites
  • † Glaphyrites angulatus
  • † Glaphyrites excelsus – type locality for species
  • † Glaphyrites hyattianus
  • † Glaphyrites subdiscus
  • † Glaphyrites warei – type locality for species
• † Glaphyrophlebia
  • † Glaphyrophlebia anderhalterorum – type locality for species
• † Glaukosocrinus
• † Globivalvulina
• † Globovalvulina
• † Globulocystites
  • † Globulocystites cristatus
  • † Globulocystites infundus
• † Glosella
  • † Glosella liumbona
• † Gloverilima
  • † Gloverilima pratti
• † Glymmatobolbina
  • † Glymmatobolbina quadrata
• † Glyprorthis
  • † Glyprorthis costellata
• † Glyptocystella
  • † Glyptocystella loeblichae
• † Glyptocystites
  • † Glyptocystites forbesi
  • † Glyptocystites loeblichae
  • † Glyptocystites logani
  • † Glyptocystites multiporus
  • † Glyptocystites regnelli – or unidentified comparable form
• † Glyptopleura
  • † Glyptopleura geisi – type locality for species
  • † Glyptopleura scotti – type locality for species
  • † Glyptopleura warthini – type locality for species
• † Glyptorthis
  • † Glyptorthis crenulata – type locality for species
  • † Glyptorthis glaseri
  • † Glyptorthis obesa – type locality for species
  • † Glyptorthis uncinata – type locality for species
• † Gnathodus

• 

  † Gnathorhiza
  • † Gnathorhiza serrata
• † Gnetalesaccus
  • † Gnetalesaccus variabilis
• † Gnorimocrinus
  • † Gnorimocrinus pontotocensis
• † Goniasma

• 

  † Goniatites
  • † Goniatites multiliratus – type locality for species
• † Gonioglyphioceras
  • † Gonioglyphioceras gracile
• † Gonioloboceratoides
• † Goniophora
• † Gorgonisphaeridium
  • † Gorgonisphaeridium antiquum
• † Gotlandochiton
  • † Gotlandochiton hami – type locality for species
• † Graffhamicrinus
  • † Graffhamicrinus antiquus
• † Grammolomatella
• † Granasporites
  • † Granasporites medius
• † Grandfieldia – type locality for genus
  • † Grandfieldia callilepidota – type locality for species
• † Granulatisporites
  • † Granulatisporites granularis
  • † Granulatisporites granulatus
  • † Granulatisporites microgranifer
  • † Granulatisporites minutus
  • † Granulatisporites verrucosus
• † Graptodictya
  • † Graptodictya elegantula
• † Griffithidella
  • † Griffithidella alternata
  • † Griffithidella doris
• † Gryphellina
  • † Gryphellina sellardsi – type locality for species
• † Grypocrinus
• † Gyalorhethium
  • † Gyalorhethium chondrodes

• 

  † Gymnophyllum
  • † Gymnophyllum wardi
• † Gypidula
  • † Gypidula multicostata
• † Gyronema

H

• † Hagnocrinus
• † Halliella
  • † Halliella labiosa

• 

  † Hallopora
  • † Hallopora dubia
  • † Hallopora macrostoma
  • † Hallopora multitabulata
  • † Hallopora pachymura
• † Halysites
• † Hamiapollenites – type locality for genus
  • † Hamiapollenites karrooensis
  • † Hamiapollenites saccatus – type locality for species
  • † Hamiapollenites tractiferinus
• † Haplistion
  • † Haplistion apletum – type locality for species
• † Hapsidopareion – type locality for genus
  • † Hapsidopareion lepton – type locality for species
• † Harpidella
  • † Harpidella butorus
• † Harpillaenus
• † Healdia
  • † Healdia caneyensis
  • † Healdia compressa
  • † Healdia harltoni – type locality for species
  • † Healdia simplicissima – type locality for species
• † Hebetorthoceras
  • † Hebetorthoceras brokenarrowense
• † Heliolites
• † Heliosocrinus
  • † Heliosocrinus neotosus – type locality for species
• † Helminthochiton
  • † Helminthochiton riddlei
• † Hemiliroceras
  • † Hemiliroceras reticulatum – type locality for species
• † Hemiphragma
  • † Hemiphragma irrasum
  • † Hemiphragma pulchra
• † Hesperocystis
  • † Hesperocystis deckeri
• † Hesperorthis
  • † Hesperorthis crinerensis
  • † Hesperorthis rowlandi
  • † Hesperorthis sulcata
• † Heterangium
• † Heteropecten
  • † Heteropecten vanvleeti – type locality for species
• † Heterotrypa
  • † Heterotrypa taffi
• † Hexacrinites
  • † Hexacrinites adaensis
  • † Hexacrinites carinatus
• † Hibbertia
• † Hindia
• † Hindiodella
• † Hippocrepina
  • † Hippocrepina bendensis
• † Hiscobeccus
  • † Hiscobeccus capax
• † Hoffmeisterites – type locality for genus
  • † Hoffmeisterites microdens – type locality for species
• † Holcospermum
• † Hollinella
  • † Hollinella burlingamensis
  • † Hollinella radiata
• † Holmesella
  • † Holmesella triangularis – type locality for species
  • † Holmesella wapanuckensis – type locality for species

• 

  † Holopea – tentative report
• † Homocladus
  • † Homocladus grandis
• † Homoeospira
  • † Homoeospira costatula
  • † Homoeospira foerstei
  • † Homoeospira subgibbosa
• † Homotrypa
  • † Homotrypa callitoecha
  • † Homotrypa dickeyvillensis
  • † Homotrypa multitabulata
  • † Homotrypa sagittata
  • † Homotrypa tuberculata
  • † Homotrypa ulrichi
• † Hormotoma
• † Howellella
  • † Howellella cycloptera
  • † Howellella henryhousensis
  • † Howellella splendens
• † Hudsonaster
• † Huntonella – type locality for genus
  • † Huntonella unicornis – type locality for species

• 

  † Huntoniatonia
  • † Huntoniatonia huntonensis
  • † Huntoniatonia lingulifer
  • † Huntoniatonia oklahomae
  • † Huntoniatonia purduei
• † Hustedia
  • † Hustedia mormoni – or unidentified comparable form
• † Hybocrinus
  • † Hybocrinus conicus
  • † Hybocrinus crinerensis
  • † Hybocrinus nitidus
  • † Hybocrinus pyxidatus
• † Hydreionocrinus
  • † Hydreionocrinus patulus
• Hyperammina
  • † Hyperammina elongata
  • † Hyperammina johnsvalleyensis – type locality for species
  • † Hyperammina rugosa
• † Hyperamminoides
  • † Hyperamminoides glabra
• † Hyperchilarina
  • † Hyperchilarina nodosimarginata
• † Hypergonia
  • † Hypergonia quadricarinata – or unidentified comparable form
  • † Hypergonia tatei – or unidentified related form

I

• † Ianthinopsis
• † Icthyocrinus
  • † Icthyocrinus corbis
• † Idiognathodus
  • † Idiognathodus delicates
  • † Idiognathodus sinuatus

• 

  † Illaenus
  • † Illaenus utahensis – or unidentified comparable form
• † Illenites
  • † Illenites delasaucei
  • † Illenites parvus
• † Inflatia
  • † Inflatia cherokeensis
  • † Inflatia clydensis
  • † Inflatia cooperi
  • † Inflatia gracilis
  • † Inflatia inflata
  • † Inflatia pusilla
  • † Inflatia succincta – type locality for species
• † Ischyrotoma
  • † Ischyrotoma sila
• † Isoallagecrinus
  • † Isoallagecrinus barnettensis – type locality for species
• † Isochilina
  • † Isochilina bulbosa
• † Isorthis
  • † Isorthis arcuaria
  • † Isorthis pygmaea
• † Isoteloides
  • † Isoteloides peri

• 

  † Isotelus
  • † Isotelus bradleyi – type locality for species
  • † Isotelus violaensis – type locality for species
• † Ivanovia – tentative report
• † Ivoechiton
  • † Ivoechiton calathicolus – type locality for species
  • † Ivoechiton oklahomensis – type locality for species

J

• † Janusella
  • † Janusella biceratina
• † Jeffersonia
  • † Jeffersonia granosa
  • † Jeffersonia jenni
  • † Jeffersonia ulrichi
• † Jonesina
  • † Jonesina spinigera – or unidentified comparable form
• † Jonesites
  • † Jonesites circa
  • † Jonesites huntonensis – type locality for species
• † Juresania

K

• 

  † Kainops
  • † Kainops invius
  • † Kainops raymondi
• † Kallimorphocrinus
  • † Kallimorphocrinus eaglei – type locality for species
• † Kawina
• † Kayina
  • † Kayina hybosa
  • † Kayina porosa
• † Kennedya
  • † Kennedya fraseri – type locality for species
  • † Kennedya mirabilis
• † Keokukia
  • † Keokukia sulcata
• † Kettneraspis
  • † Kettneraspis williamsi
• † Kirkbya
  • † Kirkbya bendensis – type locality for species
  • † Kirkbya moorei
  • † Kirkbya symmetrica
• † Kirkbyella
  • † Kirkbyella obliqua
• † Kirkidium
• † Kirkocystis – type locality for genus
  • † Kirkocystis papillata – type locality for species
• † Kitakamithyris
  • † Kitakamithyris cooperensis
• † Klausipollenites
  • † Klausipollenites aequus
  • † Klausipollenites schaubergeri
• † Knightites
  • † Knightites montfortianum
• † Knightoceras
  • † Knightoceras patulum
• † Kockelella
  • † Kockelella amsdeni
  • † Kockelella crassa
  • † Kockelella ortus
  • † Kockelella patula
  • † Kockelella ranuliformis
  • † Kockelella stauros
  • † Kockelella variabilis
  • † Kockelella walliseri
• † Kosovopeltis
• † Kozlowskia
  • † Kozlowskia splendens
• † Kozlowskiellina
  • † Kozlowskiellina vaningeni
• † Krausella
  • † Krausella arcuata
• † Krotovia
• † Kukalova – type locality for genus
  • † Kukalova americana – type locality for species

L

• † Labidosaurikos – type locality for genus
  • † Labidosaurikos meachami – type locality for species

• 

  † Labidosaurus
• † Labiisporites
  • † Labiisporites granulatus
• † Laeviatosporites
  • † Laeviatosporites ovalis
• Laevidentalium
  • † Laevidentalium venustum – or unidentified comparable form
• † Laevigatosporites
  • † Laevigatosporites desmoinesensis
  • † Laevigatosporites globosus
  • † Laevigatosporites medius
  • † Laevigatosporites ovalis
  • † Laevigatosporites striatus
  • † Laevigatosporites vulgaris
• † Lamellosathyris
  • † Lamellosathyris lamellosa
• † Lampterocrinus
  • † Lampterocrinus fatigatus
• † Lasanocrinus
  • † Lasanocrinus daileyi
  • † Lasanocrinus minutus – type locality for species
  • † Lasanocrinus multinodulus – type locality for species
  • † Lasanocrinus nodatus – type locality for species
  • † Lasanocrinus nodus – type locality for species
  • † Lasanocrinus strigosus
• † Latosporites
  • † Latosporites minutus
• † Leangella
  • † Leangella dissiticostella
• † Lecanocrinus
  • † Lecanocrinus erectus
• † Lecythiocrinus
  • † Lecythiocrinus asymmetricus – type locality for species
• † Leioclema
  • † Leioclema dozierense
  • † Leioclema pushmatahensis – type locality for species
• † Leiovalia
  • † Leiovalia scaberula
  • † Leiovalia teretis
• † Lemmatophora
  • † Lemmatophora typa

• 

  † Leonaspis
  • † Leonaspis williamsi
• † Lepadocystites
  • † Lepadocystites moorei – tentative report
• † Leperditella
  • † Leperditella aequilatera
  • † Leperditella altiforma
  • † Leperditella deckeri
  • † Leperditella incisa
  • † Leperditella jonesinoides
  • † Leperditella minima
  • † Leperditella porosa
  • † Leperditella rex
  • † Leperditella tumida
• † Leperditia
• † Lepidocoelus
• † Lepidocyclus
  • † Lepidocyclus cooperi
  • † Lepidocyclus manniensis – tentative report
  • † Lepidocyclus oblongus
  • † Lepidocyclus perlamellosus

• 

  † Lepidodendron
  • † Lepidodendron hickii
• † Lepidophloios
  • † Lepidophloios hallii/johnsonii
• † Leptaena
  • † Leptaena acuticuspidata – type locality for species
  • † Leptaena oklahomensis – type locality for species
• † Leptaenisca
  • † Leptaenisca concava
  • † Leptaenisca irregularis
• † Leptagonia
  • † Leptagonia analoga
• † Leptochirognathus
  • † Leptochirognathus extensa
• † Leptodesma
  • † Leptodesma gouldii – type locality for species
  • † Leptodesma matheri – type locality for species
  • † Leptodesma stenzeli – type locality for species
• † Leptoskelidion – tentative report
  • † Leptoskelidion septulosum
• † Leptostrophia
  • † Leptostrophia beckii
• † Levenea
  • † Levenea subcarinata
• † Ligogramma – type locality for genus
  • † Ligogramma sinuosa – type locality for species
  • † Ligogramma wichita – type locality for species
• † Limipecten
  • † Limipecten newelli – type locality for species
• † Lindosroemella
  • † Lindosroemella patula – or unidentified comparable form
• † Lindostoemella
  • † Lindostoemella patula – or unidentified comparable form
• † Lindostroemella
  • † Lindostroemella patula – or unidentified comparable form
• Lingula
  • † Lingula carbonaria – or unidentified comparable form
  • † Lingula eva
  • † Lingula paracletus – or unidentified comparable form
• † Lingulasma
  • † Lingulasma oklahomense

• 

  † Lingulella
  • † Lingulella galba
  • † Lingulella glypta
• † Linoproductus
  • † Linoproductus delawarii – type locality for species
  • † Linoproductus ovatus
  • † Linoproductus prattenianus
• † Liomolgocrinus
• † Liomopterella
  • † Liomopterella pediaecetae – type locality for species
• † Liomopterum
  • † Liomopterum ornatum
• † Liospira
• † Liroceras
  • † Liroceras liratum
• † Lisca
  • † Lisca minuta
• † Lissatrypa
  • † Lissatrypa clairensis
  • † Lissatrypa concentrica
  • † Lissatrypa decaturensis
  • † Lissatrypa henryhousensis
  • † Lissatrypa parvula
• † Lissostrophia
  • † Lissostrophia cooperi
  • † Lissostrophia lindenensis
  • † Lissostrophia lindensis
• Lithophaga
• Lituotuba

• 

  † Llistrofus – type locality for genus
  • † Llistrofus pricei – type locality for species
• † Lonchodomas
  • † Lonchodomas mcgeheei
• † Lonchodus
• † Lophamplexus
  • † Lophamplexus brevifolius – type locality for species
  • † Lophamplexus lutarius – type locality for species
  • † Lophamplexus spanius – type locality for species
  • † Lophamplexus vagus – type locality for species
• † Lophophyllidium
  • † Lophophyllidium asarcum – type locality for species
  • † Lophophyllidium compressum – type locality for species
  • † Lophophyllidium hadrum
  • † Lophophyllidium profundum
  • † Lophophyllidium wewokanum – type locality for species
• † Lophophyllum
• † Lophospira
• † Lophotichium
  • † Lophotichium amoenum
• † Lophotriletes
  • † Lophotriletes commissuralis
  • † Lophotriletes ibrahimii
  • † Lophotriletes microsaetosus
  • † Lophotriletes pseudaculeatus
  • † Lophotriletes rarispinosus
• † Lophpophyllum
  • † Lophpophyllum profundum – or unidentified comparable form
• † Loxoedischia – type locality for genus
  • † Loxoedischia drewi – type locality for species
• † Lueckisporites
  • † Lueckisporites fimbriatus
  • † Lueckisporites virkkiae
• † Lunaferamita
  • † Lunaferamita bassleri
  • † Lunaferamita virginiensis
• † Lundbladispora
• † Lunulasporites – type locality for genus
  • † Lunulasporites vulgaris – type locality for species
• † Lutesvillia
  • † Lutesvillia bispinosa
• † Lycospora
  • † Lycospora granulata
  • † Lycospora micropapillata
  • † Lycospora pellucida
  • † Lycospora pusilla
  • † Lycospora rotuda
  • † Lycospora rotunda
• † Lyroschizodus
  • † Lyroschizodus oklahomensis – type locality for species

• 

  † Lysorophus
  • † Lysorophus tricarinatus

M

• † Maclurites

• 

  † Macroleter
  • † Macroleter agilis – type locality for species
• † Macropotamorhynchus
  • † Macropotamorhynchus tuta
• † Macrostylocrinus
  • † Macrostylocrinus striatus
• † Mandalocystis – type locality for genus
  • † Mandalocystis dockeryi – type locality for species
• † Manespira
  • † Manespira costata
  • † Manespira elongata
  • † Manespira magnicostata
• † Marginatia
  • † Marginatia magna
• † Marginifera
• † Marginovatia
  • † Marginovatia manardensis
  • † Marginovatia minor
  • † Marginovatia pumila
• † Mariopteris
  • † Mariopteris nervosa
  • † Mariopteris occidentalis
• † Marsupiocrinus
  • † Marsupiocrinus stellatus
• † Marsupipollenites
  • † Marsupipollenites striatus
• † Martynovia
  • † Martynovia halli – type locality for species
  • † Martynovia longipennis – type locality for species
• † Mastigograptus
• † Matonisporites
• † Maurotarion
  • † Maurotarion axitiosum
• † Maximites
  • † Maximites oklahomensis – type locality for species
• † Mcqueenoceras
• † Meekella
  • † Meekella striatocostata
• † Meekopinna
• † Meekopora
• † Meekospira
  • † Meekospira choctawensis
  • † Meekospira peracuta
• † Megactenopetalus
  • † Megactenopetalus kaibabanus
• † Megaglossoceras
• † Megakozlowskiella
  • † Megakozlowskiella velata
• † Megaliocrinus
  • † Megaliocrinus aplatus
• † Megamyonia
  • † Megamyonia mankini
• † Meganeuropsis
  • † Meganeuropsis americana – type locality for species
• † Merista
  • † Merista oklahomensis

• 

  † Meristella
  • † Meristella atoka
• † Meristina
  • † Meristina claritensis
  • † Meristina roemeri
• † Mescalites
  • † Mescalites discoidalis
• † Mesolobus
• † Mesotrypa
  • † Mesotrypa angularis
  • † Mesotrypa favosa
  • † Mesotrypa tubulifera
• † Mesoxylon
• † Metachorus
  • † Metachorus striolatus – type locality for species

• 

  † Metacoceras
  • † Metacoceras cornutum
  • † Metacoceras sinuosum
  • † Metacoceras vagans – type locality for species
• † Metaconularia
• † Metacromyocrinus
  • † Metacromyocrinus fundundus – type locality for species
  • † Metacromyocrinus papulosus
• † Metutharocrinus
  • † Metutharocrinus cockei
  • † Metutharocrinus spinifer – type locality for species
  • † Metutharocrinus undulatus – type locality for species
• † Michelinia
  • † Michelinia meekana
• † Michelinoceras
  • † Michelinoceras directum
  • † Michelinoceras wapanuckense

• 

  † Micraroter – type locality for genus
  • † Micraroter erythrogeios – type locality for species
• † Microcaracrinus
  • † Microcaracrinus delicatus
• † Microcoelodus
  • † Microcoelodus asymmetricus
  • † Microcoelodus inornatus
  • † Microcoelodus intermedius
  • † Microcoelodus minutidentatus
  • † Microcoelodus typus
• † Microleter – type locality for genus
  • † Microleter mckinzieorum – type locality for species
• † Microreticulatisporites
  • † Microreticulatisporites nobilis
  • † Microreticulatisporites sulcatus
• † Microschmidtella
  • † Microschmidtella berdanae – type locality for species
  • † Microschmidtella hami – type locality for species
• † Microspermopteris
  • † Microspermopteris aphyllum
• † Micula – tentative report
• † Midcopterum – type locality for genus
  • † Midcopterum evidens – type locality for species
• † Mimella
  • † Mimella extensa
  • † Mimella subquadrata
• † Misthodotes
  • † Misthodotes edmundsi – type locality for species
  • † Misthodotes ovalis
• † Mitorthoceras
  • † Mitorthoceras crebriliratum – type locality for species
  • † Mitorthoceras perfilosum
• † Modiolopsis – tentative report
• Modiolus
• † Monoceratella
  • † Monoceratella brevispinata
• † Monoceratina
  • † Monoceratina ardmorensis
  • † Monoceratina ventralis

• 

  † Monograptus
• † Monticuliporella
  • † Monticuliporella croneisi
  • † Monticuliporella peculiaris
  • † Monticuliporella shideleri
• † Mooreina
  • † Mooreina johnsvalleyensis – type locality for species
• † Mooreisporites
  • † Mooreisporites inusitatus
• † Mooreoceras
• † Moorites
• † Moravia
  • † Moravia grandis – type locality for species
• † Moundocrinus
  • † Moundocrinus coalensis – type locality for species
• † Mucrosaccus
  • † Mucrosaccus alatus – type locality for species
• † Multicostella
  • † Multicostella convexa
  • † Multicostella sulcata
• † Multidentodus – type locality for genus
  • † Multidentodus brevis – type locality for species
  • † Multidentodus gracilis – type locality for species
  • † Multidentodus irregularis – type locality for species
  • † Multidentodus johnsvalleyensis – type locality for species
  • † Multidentodus typicus – type locality for species
  • † Multidentodus wapanuckensis – type locality for species
• † Murinella
  • † Murinella partita
• † Murospora
  • † Murospora kosankei
• † Myalina
  • † Myalina lepta

• 

  † Mycterosaurus – type locality for genus
  • † Mycterosaurus longiceps – type locality for species
• † Myeinocystites
  • † Myeinocystites natus
• † Myelodactylus

N

• † Nanicrinus
  • † Nanicrinus papillatus
• † Nannaroter – type locality for genus
  • † Nannaroter mckinziei – type locality for species
• † Nannospondylus – type locality for genus
  • † Nannospondylus stewarti – type locality for species
• † Naticonema

• 

  † Naticopsis
  • † Naticopsis transversa – type locality for species
• † Navispira
  • † Navispira saffordi
• † Neoarchaeocrinus
  • † Neoarchaeocrinus necopinus
• † Neochonetes
  • † Neochonetes granulifer
• † Neodimorphoceras
  • † Neodimorphoceras oklahomae
• † Neoglyphioceras
  • † Neoglyphioceras caneyanum – type locality for species
• † Neoisorophusella
  • † Neoisorophusella whitesidei – type locality for species
• † Neokoninckophyllum
  • † Neokoninckophyllum acolumnatum
  • † Neokoninckophyllum tushanense
• † Neoraistrickia
• † Neospirifer
  • † Neospirifer dunbari
• † Neostrophia
  • † Neostrophia gregaria
• † Neothlipsura
  • † Neothlipsura furca

• 

  † Neuropteris
  • † Neuropteris heterophylla
  • † Neuropteris macrophylla
  • † Neuropteris obliqua
  • † Neuropteris osmundae
  • † Neuropteris rarinervis
• † Nicholsonella
  • † Nicholsonella acanthobscura
  • † Nicholsonella irregularis
  • † Nicholsonella laminata
  • † Nicholsonella moniliformis
• † Nobloedischia – type locality for genus
  • † Nobloedischia rasnitsyni – type locality for species
• † Nodosinella
  • † Nodosinella glennensis – type locality for species
• † Nucleospira
  • † Nucleospira concentrica
  • † Nucleospira ventricosa

• 

  Nucula
• Nuculana
• † Nuculavus
• † Nuculopsis
  • † Nuculopsis girtyi
  • † Nuculopsis subventricosa
  • † Nuculopsis wewoka
  • † Nuculopsis wewokana
• † Nudauris
  • † Nudauris reticulata
• † Nuferella
  • † Nuferella rothi – type locality for species
• † Nummicrinus
  • † Nummicrinus brevis
  • † Nummicrinus papilloseous
• † Nummulostegina
  • † Nummulostegina ardmorensis – type locality for species
• † Nuskoisporites
  • † Nuskoisporites renulatus – type locality for species

O

• † Obturamentella – type locality for genus
  • † Obturamentella wadei
• † Octonaria

• 

  † Odontochile
  • † Odontochile syncrama
  • † Odontochile taffi
• † Odontopteris
  • † Odontopteris permiensis – or unidentified comparable form
• † Oepikina
  • † Oepikina expatiata
  • † Oepikina extensa
  • † Oepikina formosa
  • † Oepikina gregaria
• † Oinochoe
  • † Oinochoe coccymelum – type locality for species
• † Oistodus
  • † Oistodus abundans
  • † Oistodus inclinatus
• † Oklahomacrinus
  • † Oklahomacrinus frostae
• † Oklahomacystis
  • † Oklahomacystis spissus
  • † Oklahomacystis tribrachiatus
• † Oklahomasporites – type locality for genus
  • † Oklahomasporites majori – type locality for species
• † Oligophyllum – or unidentified comparable form
• † Oligotypus
  • † Oligotypus tillyardi
• † Oliveria
• † Oltulocrinus
• † Omphalotrochus
  • † Omphalotrochus wolfcampensis
• † Onniella – tentative report
• † Onychoplecia
  • † Onychoplecia tenuis
• † Onychotreta
  • † Onychotreta multiplicata

• 

  † Ophiacodon
  • † Ophiacodon major
  • † Ophiacodon mirus – or unidentified comparable form
  • † Ophiacodon uniformis
• † Ophiletina
  • † Ophiletina bromidensis – type locality for species
• † Opisthodontosaurus – type locality for genus
  • † Opisthodontosaurus carrolli – type locality for species
• † Orbiculoidea
  • † Orbiculoidea eximia
• † Orbignyella
  • † Orbignyella sublamellosa
• † Orobias
  • † Orobias ciscoensis
• † Oromycter – type locality for genus
  • † Oromycter dolesorum – type locality for species
• † Orovenator – type locality for genus
  • † Orovenator mayorum – type locality for species

• 

  † Orthacanthus
  • † Orthacanthus compressus
• † Orthoceras
• † Orthograptus
  • † Orthograptus eucharis
• † Orthonema
• † Orthosphaeridium
  • † Orthosphaeridium vibrissiferum
• † Orthostrophella
  • † Orthostrophella clairensis
• † Orthostrophia
  • † Orthostrophia brownsportensis – or unidentified comparable form
  • † Orthostrophia strophomenoides
• † Orthotetes
  • † Orthotetes kaskaskiensis
  • † Orthotetes springerensis – type locality for species
• † Otarion
  • † Otarion axitosum – type locality for species
• † Ottonosia
• † Oulodus
  • † Oulodus siluricus
• † Ovatia
  • † Ovatia laevicosta
• † Oxoplecia
  • † Oxoplecia filosa
  • † Oxoplecia gouldi
• † Oxyprora
  • † Oxyprora oklahomaense
  • † Oxyprora sayrei – type locality for species
• † Ozarkodina
  • † Ozarkodina bohemica
  • † Ozarkodina confluens
  • † Ozarkodina crassa
  • † Ozarkodina sagitta

P

• † Pachydictya
  • † Pachydictya bromidensis
  • † Pachydictya sheldonensis
• † Pachydomella
  • † Pachydomella sohni – type locality for species
• † Pachyglossella
  • † Pachyglossella biconvexa
• † Pachylyroceras
  • † Pachylyroceras cloudi

• 

  † Paciphacops
  • † Paciphacops birdsongensis – or unidentified comparable form
  • † Paciphacops campbelli
  • † Paciphacops raymondi
• † Paladin
  • † Paladin morrowensis
  • † Paladin mucronatus – tentative report
• Palaeoaplysina – tentative report
• † Palaeocapulus – tentative report
  • † Palaeocapulus acutirostre – or unidentified comparable form
• † Palaeocrinus
  • † Palaeocrinus hudsoni
• † Palaeocystites – tentative report
• † Palaeolima
  • † Palaeolima inequicostata
• † Palaeoneilo
• † Palaeostylus
• † Palaeotextularia
• † Palaeozygopleura
  • † Palaeozygopleura parva – tentative report
• † Palecocrinus – tentative report
• † Paleochiton
  • † Paleochiton kindbladensis – type locality for species
• † Paleohyperamum – type locality for genus
  • † Paleohyperamum pottsvillensis – type locality for species
• † Paleotextularia
• † Paleuthygramma
  • † Paleuthygramma acuta – type locality for species
• † Paleyoldia
  • † Paleyoldia glabra
• † Palliseria
  • † Palliseria robusta
• † Palmerocrinus
  • † Palmerocrinus profundus – type locality for species
• † Paltodus
  • † Paltodus compressus
• † Pandaspinapyga
  • † Pandaspinapyga salsa
• † Panderodus
  • † Panderodus equicostatus
  • † Panderodus gracilis
  • † Panderodus greenlandensis
  • † Panderodus panderi
  • † Panderodus unicostatus
• † Parabolbina
  • † Parabolbina scotti
• † Paraconularia
• † Paracremacrinus
  • † Paracremacrinus laticardinalis
• † Paracromyocrinus
  • † Paracromyocrinus oklahomensis
  • † Paracromyocrinus planatus – type locality for species
• † Paradiabolocrinus
• † Paraechmina
• † Paragassizocrinus
  • † Paragassizocrinus tarri
• † Parahealdia
  • † Parahealdia quaesita
• † Paralegoceras
  • † Paralegoceras iowense
  • † Paralegoceras textum
• † Parallelodon
  • † Parallelodon vokesi – type locality for species
• † Paramelocrinus
  • † Paramelocrinus ubaghsi
• † Paramphicrinus
• † Paraparchites
  • † Paraparchites circulantis
  • † Paraparchites elongatus – or unidentified comparable form
  • † Paraparchites wapanuckensis
• † Parapermopsylla – type locality for genus
  • † Parapermopsylla tricubita – type locality for species
• † Parapostibulla
  • † Parapostibulla graysoni – type locality for species
• † Paraprisca
  • † Paraprisca fragilis
• † Pararchaeocrinus
  • † Pararchaeocrinus decoratus
• † Parasaccites
  • † Parasaccites korbaenis
• † Paraschmidtella
• † Parastrophinella
  • † Parastrophinella lepida
• † Parazophocrinus
  • † Parazophocrinus callosus
• † Parelmoa – type locality for genus
  • † Parelmoa obtusa – type locality for species
  • † Parelmoa radialis – type locality for species
  • † Parelmoa revelata – type locality for species
• † Parulrichia
  • † Parulrichia haragenensis
• † Pasawioops – type locality for genus
  • † Pasawioops mayi – type locality for species
• † Passalocrinus
• † Paucicrura
  • † Paucicrura oklahomensis
  • † Paucicrura rogata – or unidentified comparable form
• † Paurorthis
  • † Paurorthis macrodeltoidea

• 

  † Pecopteris
  • † Pecopteris cyathea
  • † Pecopteris geinitzi
  • † Pecopteris hemitelioides
  • † Pecopteris miltonii
  • † Pecopteris plumosa-dentata – informal
  • † Pecopteris sarefolia
• † Pelidocrinus
  • † Pelidocrinus exiguus
• † Peltabellia
  • † Peltabellia implexa
• † Peltacrinus
  • † Peltacrinus sculptatus
• † Penicillicrinus
• † Penniretepora
  • † Penniretepora ardmorensis – type locality for species
• † Pennsylvanioxylon
• † Pentameroides

• 

  † Pentremites
• † Periglyptocrinus
  • † Periglyptocrinus priscus
• † Perimestocrinus
  • † Perimestocrinus teneris
• † Peripetoceras
• † Permoberotha
  • † Permoberotha villosa – tentative report
• † Permoblattina
  • † Permoblattina curta
• † Permocoleus – type locality for genus
  • † Permocoleus wellingtonensis – type locality for species
• † Permopanorpa
  • † Permopanorpa inaequalis
• † Permophorus
  • † Permophorus albequus
  • † Permophorus immaturis
  • † Permophorus mexicanus
• † Permopsylla
  • † Permopsylla americana – tentative report
• † Perrinites
  • † Perrinites hilli
• † Perryella – type locality for genus
  • † Perryella olsoni – type locality for species

• 

  † Petalodus
• † Petigurus
  • † Petigurus cullisoni
• † Petraia – tentative report
• † Petraster
• † Petrocrania
  • † Petrocrania inflata
• † Phacellopegma
  • † Phacellopegma schizoderma
• † Phacelocrinus
  • † Phacelocrinus brevis – type locality for species
  • † Phacelocrinus rosei
• † Phanassymetria
  • † Phanassymetria quadrupla
  • † Phanassymetria triserrata
• † Phanelactis
• † Phaneroneura – type locality for genus
  • † Phaneroneura martynovae – type locality for species
  • † Phaneroneura reducta – type locality for species
• † Phanocrinus
  • † Phanocrinus alexanderi – type locality for species
• † Pharkidonotus
  • † Pharkidonotus percarinatus
• † Phenopterum
  • † Phenopterum elongatum
• † Phestia
  • † Phestia inflata
• † Philhedra
• † Phillipsia – tentative report
• † Phimocrinus
• † Pholidocidaris – tentative report
  • † Pholidocidaris irregularis – or unidentified comparable form
• † Phragmodus
  • † Phragmodus inflexus
  • † Phragmodus undatus
• † Phragmolites
• † Phricodothyris
• † Phyloblatta
  • † Phyloblatta curvata
• † Phymatopleura
  • † Phymatopleura heteropleura – type locality for species
  • † Phymatopleura nodosa
• † Pidelocrinus
  • † Pidelocrinus planus
• † Pilosisporites
  • † Pilosisporites aculeolatus
  • † Pilosisporites williamsii

• 

  † Pinnularia
• † Pirocystella
• † Pisocrinus
  • † Pisocrinus quinquelobus
  • † Pisocrinus spatulatus
  • † Pisocrinus spatulus
  • † Pisocrinus tennesseensis
• † Pityosporites
  • † Pityosporites westphalensis
• † Placotriplesia
  • † Placotriplesia praecipta

• 

  † Plaesiomys
  • † Plaesiomys bellistriatus
  • † Plaesiomys proavitus
  • † Plaesiomys subquadrata
• † Plagioglypta
  • † Plagioglypta annulostriatum
• † Planisporites
• † Planobola
  • † Planobola macrogota
• † Platyceras
  • † Platyceras subelegans

• 

  † Platycrinites
• † Platycystites
  • † Platycystites bassleri
  • † Platycystites bromidensis
  • † Platycystites faberi
  • † Platycystites fimbriatus
  • † Platycystites infundus
  • † Platycystites levatus
• † Platyfundocrinus
  • † Platyfundocrinus webbersensis – type locality for species
• † Platymena – tentative report
  • † Platymena bellatula
• † Platyrhomboides
  • † Platyrhomboides quadratus
• † Platysaccus
  • † Platysaccus papilionis
  • † Platysaccus saarensis

• 

  † Platysomus
  • † Platysomus palmaris – or unidentified comparable form
• † Platystrophia
  • † Platystrophia prima
  • † Platystrophia sutherlandi
  • † Platystrophia uncinata
• † Plectambonites
  • † Plectambonites sericeus
• † Plectodonta
  • † Plectodonta petila
• † Plectoglossa
  • † Plectoglossa oklahomensis
• † Plectorthis
  • † Plectorthis punctata
  • † Plectorthis symmetrica
• † Pleuracanthus
  • † Pleuracanthus gracilis

• 

  † Pleurocystites
  • † Pleurocystites watkinsi
• † Plicochonetes
• † Pliomerops
  • † Pliomerops canadensis – or unidentified comparable form
• † Pluchratia
• † Plummericrinus
  • † Plummericrinus expansus – type locality for species
• † Poikilofusa
  • † Poikilofusa plethysticha
• † Polidevcia
  • † Polidevcia bellistriata
  • † Polidevcia vaseyana – or unidentified comparable form
• † Poloniella
  • † Poloniella chaleurensis – or unidentified comparable form
• † Polyancistrodorus
  • † Polyancistrodorus columbariferus
• † Polycaulodus
  • † Polycaulodus bidentatus
  • † Polycaulodus tridentatus
• † Polycladiopora
  • † Polycladiopora pinnata – or unidentified comparable form
• † Polydeltoideus
  • † Polydeltoideus enodatus
• † Polygnathodella – type locality for genus
  • † Polygnathodella ouachitensis – type locality for species
• † Polygnathoides
  • † Polygnathoides siluricus
• † Polygnathus
  • † Polygnathus wapanuckensis – type locality for species
• † Polylophothylax
  • † Polylophothylax crossii
• † Polyplacognathus
  • † Polyplacognathus sweeti
• † Polypora
  • † Polypora debilis – type locality for species
  • † Polypora ovicellata – type locality for species
• † Polytylites
  • † Polytylites coryelli – type locality for species
  • † Polytylites kellettae – type locality for species
  • † Polytylites levinsoni – type locality for species
• † Porocrinus
  • † Porocrinus bromidensis
• † Postibulla
  • † Postibulla westergaardi – type locality for species
• † Poteriocrinus – tentative report
• † Potonieisporites
  • † Potonieisporites simplex – type locality for species
• † Praecursoricrinus
  • † Praecursoricrinus sulphurensis
• † Praepleurocystis
  • † Praepleurocystis watkinsi
• † Prasopora
  • † Prasopora fritzae
• † Primitiella
  • † Primitiella varicata
• † Primitiopsis
  • † Primitiopsis bassleri
  • † Primitiopsis elegans
  • † Primitiopsis excavatus
  • † Primitiopsis minutus
• † Prioniodus
  • † Prioniodus altodus – type locality for species
  • † Prioniodus gerdae
• † Prismopora
• † Proallosocrinus
  • † Proallosocrinus exemptus – type locality for species
  • † Proallosocrinus glenisteri – type locality for species
• † Probnis
  • † Probnis speciosa
• † Probolichas
• † Prodentalium
• † Productella
  • † Productella recensis – type locality for species
• † Productus
  • † Productus parvus
  • † Productus stehlii – type locality for species

• 

  † Proetus
  • † Proetus foculus
• † Progoneura
  • † Progoneura grimaldii – type locality for species
  • † Progoneura nobilis – type locality for species
  • † Progoneura venula – type locality for species
• † Prokopicrinus
  • † Prokopicrinus laevis
  • † Prokopicrinus tuberculatus
• † Promopalaeaster
• † Proshumardites
• † Protencrinus
  • † Protencrinus atoka – type locality for species
• † Protereisma
  • † Protereisma arcuatum – or unidentified comparable form
  • † Protereisma latum
• † Prothalassoceras
  • † Prothalassoceras inexpectans – type locality for species
• † Prothyris
  • † Prothyris soleniformis – type locality for species
• † Protocaptorhinus
  • † Protocaptorhinus pricei
• † Protohaploxypinus
  • † Protohaploxypinus duivenii
  • † Protohaploxypinus rugosus
  • † Protohaploxypinus samoilovichii
  • † Protohaploxypinus suchonensis – or unidentified comparable form
• † Protohymen
  • † Protohymen anomalus – type locality for species
  • † Protohymen bifurcatus – type locality for species
  • † Protohymen curvatus – type locality for species
  • † Protohymen largus – type locality for species
  • † Protohymen latus – type locality for species
  • † Protohymen pictus – type locality for species
  • † Protohymen readi
  • † Protohymen shafferi – type locality for species
  • † Protohymen venustus – type locality for species
• † Protozyga
  • † Protozyga loeblichi
• † Prouddenites
  • † Prouddenites primus
• † Pseodorthoceras
• † Pseudelmoa – type locality for genus
  • † Pseudelmoa ampla – type locality for species
• † Pseudoconocardium
• † Pseudocryptophyllum – or unidentified comparable form
• † Pseudodielasma
  • † Pseudodielasma perplexa
• † Pseudoiasvia – type locality for genus
  • † Pseudoiasvia sinuosa – type locality for species
• † Pseudolingula
  • † Pseudolingula elegantula – or unidentified comparable form
  • † Pseudolingula imperfecta
• † Pseudomera
  • † Pseudomera barrandei
• † Pseudomonotis – tentative report
• † Pseudomulceodens
  • † Pseudomulceodens cancellatus – or unidentified related form
• † Pseudoolenoides
  • † Pseudoolenoides acicaudus
  • † Pseudoolenoides carterensis – type locality for species
  • † Pseudoolenoides derbyi – type locality for species
• † Pseudooneotodus
  • † Pseudooneotodus bicornis
  • † Pseudooneotodus linguicornis
• † Pseudoparalegoceras
  • † Pseudoparalegoceras brazoense
• † Pseudopronorites
  • † Pseudopronorites arkansasense
  • † Pseudopronorites quinni
• † Pseudorthoceras
  • † Pseudorthoceras knoxense
• † Pseudosyrinx
  • † Pseudosyrinx missouriensis – or unidentified comparable form
• † Pseudothoceras
• † Pseudozygopleura
  • † Pseudozygopleura multicostata – tentative report
  • † Pseudozygopleura peoriense
  • † Pseudozygopleura plebium – tentative report
  • † Pseudozygopleura scitula
• † Psilokirkbyella
  • † Psilokirkbyella magnopuncata
• † Psophosphaera
  • † Psophosphaera greeri
• † Pteroconus – tentative report
  • † Pteroconus abbreviatus
• † Pteronites
  • † Pteronites angustatus – or unidentified comparable form
• † Pterotocrinus – tentative report
  • † Pterotocrinus springerensis – type locality for species
• † Ptychocladia
  • † Ptychocladia bassleri
• † Ptychopleurella
  • † Ptychopleurella rugiplicata
• † Pudoproetus
  • † Pudoproetus chappelensis
• † Pulchratia
• † Pulchrilamina
  • † Pulchrilamina spinosa
• † Punctaparchites
  • † Punctaparchites rugosus
• † Punctatisporites
  • † Punctatisporites flavus
  • † Punctatisporites glaber
  • † Punctatisporites minutus
• † Punctatosporites
  • † Punctatosporites minutus
• † Punctospirifer
  • † Punctospirifer kentuckensis
  • † Punctospirifer subtexta
  • † Punctospirifer transversa
• † Punctothyris
  • † Punctothyris kenwoodensis
• † Punka
  • † Punka akoura
  • † Punka verecunda
• † Pustula
  • † Pustula kenwoodensis – type locality for species
  • † Pustula oklahomae – type locality for species
• † Pycnopora
  • † Pycnopora ovatipora – type locality for species
• † Pygmaeocrinus
• † Pyrgocystis

Q

• † Quadrocystis
  • † Quadrocystis graffhami

R

• † Raaschia – type locality for genus
  • † Raaschia oklahomensis – type locality for species
• † Rafinesquina
• † Raistrickia
  • † Raistrickia abdita
  • † Raistrickia aculeata
  • † Raistrickia aculeolata
  • † Raistrickia breveinens
  • † Raistrickia crinita
  • † Raistrickia crocea
• † Rakverella – tentative report
• † Ranapeltis
  • † Ranapeltis rowlandi – type locality for species
• † Ranasasus
  • † Ranasasus brevicephalus
  • † Ranasasus colossus
  • † Ranasasus conicus
• † Randaynia
  • † Randaynia leatherburyi
• † Raphistoma
• † Rayella
  • † Rayella calvini
  • † Rayella parva
• † Raymondites
• † Rayonnoceras
  • † Rayonnoceras vaughanianum – type locality for species
• † Rectifenestella
  • † Rectifenestella tenax
• † Redstonia
  • † Redstonia cooperi
• † Reedops
  • † Reedops deckeri
• † Regulaecystis
• † Remopleurides
• † Renalcis
• † Renaultia
• † Rensselaerina
  • † Rensselaerina haraganana
• Reophax
  • † Reophax oacuhitensis – type locality for species
• † Resserella
  • † Resserella brownsportensis
• † Reteocrinus
  • † Reteocrinus depressus – type locality for species
• † Reticestus – tentative report
  • † Reticestus retiferus
• † Reticulaiina
• † Reticulariina
• † Reticulatisporites
  • † Reticulatisporites reticulatus
• † Reticulopteris
  • † Reticulopteris muensteri
• † Retispira
  • † Retispira meekiana
  • † Retispira reticulata – type locality for species
• † Rhabdomeson
  • † Rhabdomeson foerstei – type locality for species
  • † Rhabdomeson rogersi – type locality for species
  • † Rhabdomeson ulrichi – type locality for species
• † Rhipidomella
  • † Rhipidomella acutisulcata – type locality for species
  • † Rhipidomella diminutiva
  • † Rhipidomella henryhousensis – type locality for species
  • † Rhipidomella oklahomensis – type locality for species
  • † Rhipidomella subtriangularis – type locality for species
• † Rhipidomelloides
  • † Rhipidomelloides oblata
• † Rhiptosocherma
  • † Rhiptosocherma improcera
• † Rhizomaspora – type locality for genus
  • † Rhizomaspora divaricata – type locality for species
  • † Rhizomaspora lemniscata – type locality for species
  • † Rhizomaspora radiata – type locality for species
• † Rhizomospora
• † Rhizophyllum
• † Rhombocladia
• † Rhombopora
  • † Rhombopora johnsvalleyensis – type locality for species
  • † Rhombopora nitidula – type locality for species
• † Rhopalia
  • † Rhopalia catenata

• 

  † Rhynchonkos
  • † Rhynchonkos stovalli – type locality for species
• † Rhynchopora
  • † Rhynchopora kollari – type locality for species
  • † Rhynchopora persinuata
• † Rhynchospirina
  • † Rhynchospirina maxwelli – type locality for species
• † Rhynchotrema
  • † Rhynchotrema increbescens – tentative report
• † Richardsonites
  • † Richardsonites richardsonianus – type locality for species
• † Rishona

• 

  Rogerella
• † Rollia
  • † Rollia goodwini
• Rostricellula
  • † Rostricellula cuneata
• † Rothella
  • † Rothella haraganensis – type locality for species
  • † Rothella obliqua
  • † Rothella recta
• † Rothianiscus
  • † Rothianiscus robusta – type locality for species
• † Roundyella
  • † Roundyella bellatula
• † Rowleyella
  • † Rowleyella fabulites
• † Rugosochinetes
• † Rugosochonetes
  • † Rugosochonetes multicostus

S

• † Saccocrinus
  • † Saccocrinus benedicti
• † Saffordotaxis
• † Sagenodus
  • † Sagenodus vinslovi
• † Sandia
• † Sanguinolites
  • † Sanguinolites omalianus
  • † Sanguinolites raleighensis
  • † Sanguinolites simulans
• † Sansabella
  • † Sansabella keslingi – type locality for species
  • † Sansabella truncata – or unidentified comparable form
• † Sansabelloides
• † Sargentina
  • † Sargentina allani – or unidentified comparable form
• † Saucrophyllum
• † Scaphiocrinus – tentative report
• † Schellwienella
  • † Schellwienella marcidula
• † Schistoceras
  • † Schistoceras unicum – type locality for species
• † Schizambon
  • † Schizambon perspinosum
• † Schizodus
  • † Schizodus chesterensis
  • † Schizodus ovatus
  • † Schizodus texanus
• † Schizonema
  • † Schizonema hami
• † Schizophoria
  • † Schizophoria mayesensis – type locality for species
• † Schmidtella
  • † Schmidtella affinis
  • † Schmidtella asymmetrica
  • † Schmidtella brevis
  • † Schmidtella crassimarginata
  • † Schmidtella excavata
  • † Schmidtella minuta
  • † Schmidtella ovalis
  • † Schmidtella transversa
• † Schopfipollenites
  • † Schopfipollenites signatus – type locality for species
• † Schuchertella
  • † Schuchertella attentuata
  • † Schuchertella haraganensis
• † Sciadiocrinus
  • † Sciadiocrinus cascus – type locality for species
  • † Sciadiocrinus crassacanthus
  • † Sciadiocrinus planulatus
• † Scolecia
  • † Scolecia filosa
• † Scolecopteris
  • † Scolecopteris altissima
  • † Scolecopteris gnoma
• † scolerodont
• † Scolopodus
  • † Scolopodus oklahomensis – type locality for species
  • † Scolopodus striatum – type locality for species
• † Scutepustula
  • † Scutepustula arctifossa
• † Scyphocrinites

• 

  † Scytalocrinus
  • † Scytalocrinus crassibrachiatus – type locality for species
  • † Scytalocrinus sansabensis
• † Sedgwickia
  • † Sedgwickia rugosa – type locality for species
• † Seminolites
  • † Seminolites kosomensis – type locality for species
  • † Seminolites perforatus – type locality for species
  • † Seminolites pushmatahensis – type locality for species
• † Seminolithes
  • † Seminolithes clarkei – type locality for species
• † Senftenbergia
• † Septimyalina
  • † Septimyalina burmai
• † Septopora

• 

  † Seymouria
  • † Seymouria baylorensis
• † Shaleria – tentative report
• † Shansiella
  • † Shansiella carbonaria – tentative report
• † Shumardoceras
• † Sibyrhynchus
• † Sieberella
  • † Sieberella roemeri
• † Sievertsia

• 

  † Sigillaria
• † Sigmophlebia – type locality for genus
  • † Sigmophlebia engeli – type locality for species
• † Sillerpeton – type locality for genus
  • † Sillerpeton permianum – type locality for species
• † Sinclairocystis
  • † Sinclairocystis angulatus
  • † Sinclairocystis praedicta
  • † Sinclairocystis sulphurensis
• † Sinuitina
  • † Sinuitina cordiformis – type locality for species
• † Sinuopea
  • † Sinuopea basiplanata
  • † Sinuopea vera
• † Siphonocrinus
  • † Siphonocrinus dignus
• † Skenidioides
  • † Skenidioides henryhousensis
  • † Skenidioides oklahomensis
  • † Skenidioides perfectus
• † Skenidium
  • † Skenidium insigne

• 

  Solecurtus
  • † Solecurtus gardneri – type locality for species
• Solemya – report made of unidentified related form or using admittedly obsolete nomenclature
• † Soleniscus
  • † Soleniscus primigenia
  • † Soleniscus regularis
• † Solenochilus
• † Solenomorpha – tentative report
  • † Solenomorpha nitida – or unidentified comparable form
• † Somoholites
• † Sowerbyella
  • † Sowerbyella indistincta
  • † Sowerbyella plicatifera
  • † Sowerbyella variabilis
  • † Sowerbyella vulgata
• † Sowerbyites
  • † Sowerbyites hami
  • † Sowerbyites lamellosus
• † Spaniocrinus
• † Speyeris
  • † Speyeris hami

• 

  † Sphaerexochus
  • † Sphaerexochus glaber
• † Sphaerirhynchia
  • † Sphaerirhynchia glomerosa – type locality for species
  • † Sphaerirhynchia lindenensis
• † Sphaerocoryphe
• † Sphaerodoma
  • † Sphaerodoma gracilis
• † Sphaerolepis
  • † Sphaerolepis arctata

• 

  † Sphenophyllum
  • † Sphenophyllum emarginatum
  • † Sphenophyllum gilmorei
  • † Sphenophyllum latifolium – or unidentified comparable form
  • † Sphenophyllum obovatum
  • † Sphenophyllum stoukenbergi – tentative report
• † Sphenopteris
  • † Sphenopteris macilenta
• † Spinobairdia
• † Spinocarinifera
  • † Spinocarinifera semicostata
• † Spinosporites
  • † Spinosporites exiguus

• 

  † Spirifer
  • † Spirifer casteri – type locality for species
  • † Spirifer grimesi
  • † Spirifer opimus
• † Spiriferellina
• † Spirillina
  • † Spirillina bendensis – type locality for species
• Spirorbis
  • † Spirorbis elegans – type locality for species
• † Spongophylloides
• † Squamularia
• † Stacheia
  • † Stacheia congesta
• † Staffella
• † Stegerhynchus
  • † Stegerhynchus carmelensis
  • † Stegerhynchus clairensis
  • † Stegerhynchus concinna
• † Stegnopsis
  • † Stegnopsis erythragora – type locality for species
  • † Stegnopsis wellingensis – type locality for species
• † Stegocoelia
• † Stellarocrinus
  • † Stellarocrinus cuneatus
• † Stenocladia – tentative report
  • † Stenocladia bassleri
• † Stenopecrinus
  • † Stenopecrinus ornatus – type locality for species
• † Stenopora
• † Stephanozyga
• † Steptognathodus
• † Stereobrachicrinus – type locality for genus
  • † Stereobrachicrinus pustullosus – type locality for species
• † Stereostylus
  • † Stereostylus perversus
• † Stictopora
  • † Stictopora fenestrata
• † Strabocystis – type locality for genus
  • † Strabocystis fayi – type locality for species
• † Straparollus
• † Straparolous
  • † Straparolous catilloides
  • † Straparolous catiloides
• † Streblochondria – tentative report
  • † Streblochondria tenuilineata
• † Strebloplax – type locality for genus
  • † Strebloplax crustacea – type locality for species
• † Streblotrypa
  • † Streblotrypa nicklesi
• † Streptognathodus
• † Streptorhynchus
• † Striatites
  • † Striatites richteri
• † Striatopodocarpites
  • † Striatopodocarpites caricicostatus
  • † Striatopodocarpites communis
  • † Striatopodocarpites olsonii
• † Strigigenalis
  • † Strigigenalis caudata
  • † Strigigenalis crassimarginata
  • † Strigigenalis derbyi
  • † Strigigenalis implexa
  • † Strigigenalis insentis
  • † Strigigenalis knighti – or unidentified comparable form
• † Strimplecystis – type locality for genus
  • † Strimplecystis oklahomensis – type locality for species
• † Strixella
  • † Strixella acutisulcata
• † Strobeus
  • † Strobeus brevis
  • † Strobeus gouldiana – type locality for species
  • † Strobeus intercalaris
  • † Strobeus paludinaeformis
• † Stroboceras
  • † Stroboceras furnishi – type locality for species
• † Stromatotrypa
  • † Stromatotrypa frondosa
• † Strongylocrinus
  • † Strongylocrinus hansoni – type locality for species
  • † Strongylocrinus ornatus – type locality for species
• † Strophochonetes

• 

  † Strophomena
  • † Strophomena clermontensis
  • † Strophomena costellata
  • † Strophomena crinerensis
  • † Strophomena neglecta
  • † Strophomena oklahomensis
  • † Strophomena perconcava – or unidentified comparable form
  • † Strophomena planumbona
  • † Strophomena trentonensis
• † Strophonella
  • † Strophonella alterniradiata
  • † Strophonella bransoni – type locality for species
  • † Strophonella laxiplicata
  • † Strophonella loeblichi
  • † Strophonella prolongata
• † Strophostylus
• † Strotersporites – type locality for genus
  • † Strotersporites communis – type locality for species
• † Stylocrinus
• † Sulcatisporites
  • † Sulcatisporites potoniei
• † Sylvohymen
  • † Sylvohymen ingens – type locality for species
• † Synchirocrinus
  • † Synchirocrinus divisus
  • † Synchirocrinus quadratus
• † Synerocrinus
  • † Synerocrinus farishi
• † Syngastrioceras
  • † Syngastrioceras clinei – type locality for species
  • † Syngastrioceras scotti
• † Syringaxon

T

• † Tabulipora
  • † Tabulipora macnairi – type locality for species
  • † Tabulipora simplex – type locality for species
  • † Tabulipora tuberculata – or unidentified comparable form
• † Taeniaesporites
  • † Taeniaesporites noviaulensis – or unidentified comparable form
• † Taeniopteris
  • † Taeniopteris abnormis
  • † Taeniopteris multinervis
• † Tainoceras
  • † Tainoceras murrayi
• † Tanaocystis
  • † Tanaocystis watkinsi
• † Tarphyceras
  • † Tarphyceras chadwickense
• † Teguliferina
  • † Teguliferina parva – type locality for species
• † Tegulocrea
  • † Tegulocrea incerta
• † Teiichispira
  • † Teiichispira affinis – or unidentified comparable form
• † Tellinomorpha
  • † Tellinomorpha schencki – type locality for species

• 

  † Tentaculites
• † Terpnocrinus
• † Tersomius
  • † Tersomius dolesensis – type locality for species
  • † Tersomius mosesi – type locality for species
  • † Tersomius texensis – or unidentified comparable form
• † Tetradellina
  • † Tetradellina henningsmoeni
• † Tetrataxis
  • † Tetrataxis decurrens – or unidentified comparable form
  • † Tetrataxis lata

• 

  Textularia
  • † Textularia grahamensis – or unidentified comparable form
• † Thalamocrinus
  • † Thalamocrinus elongatus
• † Thalattocanthus
  • † Thalattocanthus consonus
• † Thaleops
  • † Thaleops jaanussoni
• † Thallograptus
• † Thamniscus
  • † Thamniscus erectus – type locality for species
• † Thigriffides
  • † Thigriffides roundyi
• † Thlipsura
  • † Thlipsura furca
• † Thlipsurella
  • † Thlipsurella fossata
  • † Thlipsurella muricurva
  • † Thlipsurella murrayensis – type locality for species
  • † Thlipsurella putea
• † Thlipsuroides
• † Thomasatia
  • † Thomasatia auricula
• † Thomasatina
  • † Thomasatina bromidensis
  • † Thomasatina simplex
• † Thoracoceras
• † Thrausmosaurus – type locality for genus
  • † Thrausmosaurus serratidens – type locality for species
• † Thuroholia
  • † Thuroholia crinerensis
  • † Thuroholia croneisi
  • † Thuroholia overbrookensis
• † Thymnospora
  • † Thymnospora pseudothiessenii – or unidentified comparable form
• † Thymospora
  • † Thymospora pseudothiessenii
• † Tolypammina
• † Torispora
  • † Torispora securis
• † Torynifer
• † Trematospira
  • † Trematospira costata – or unidentified comparable form
  • † Trematospira hippolyte – or unidentified comparable form
• † Trepospira
  • † Trepospira depressa
• † Trigonirhynchia
  • † Trigonirhynchia acutirostella

• 

  † Trimerorhachis
  • † Trimerorhachis insignis
• † Triquitrites
  • † Triquitrites additus
  • † Triquitrites bransonii
  • † Triquitrites exiguus
  • † Triquitrites sculptilis
  • † Triquitrites spinosus
  • † Triquitrites subspinosus
  • † Triquitrites tribullatus
• † Tririctus – type locality for genus
  • † Tririctus reticulatus – type locality for species
• † Tritonoceras
• † Trochonodella
  • † Trochonodella obtusa
• † Trochosporites – type locality for genus
  • † Trochosporites reniformis – type locality for species
• † Trucherognathus
  • † Trucherognathus distorta
  • † Trucherognathus irregularis
• † Tryplasma
• † Tuberculatosporites
  • † Tuberculatosporites robustus
• † Tubulibairdia
  • † Tubulibairdia simplex
• † Tupus
  • † Tupus gracilis – type locality for species
• † Turgidacystis – type locality for genus
  • † Turgidacystis graffhami – type locality for species
• † Turrilepas
  • † Turrilepas whithersi – type locality for species

U

• † Ulocrinus
• † Ulrichia
• † Ulrichidiscus
  • † Ulrichidiscus forbesi – type locality for species
• † Unibothriocidaris

• 

  † Urasterella
• † Utharocrinus
  • † Utharocrinus pentanodus

V

• † Valcourea
  • † Valcourea transversa

• 

  † Varanodon – type locality for genus
  • † Varanodon agilis – type locality for species
• † Varanops
  • † Varanops brevirostris – or unidentified comparable form
• † Veliberychia
• † Vermiporella – tentative report
• † Verrucosisporites
  • † Verrucosisporites grandiverrucosus
  • † Verrucosisporites microtuberosus
  • † Verrucosisporites verrucosus – or unidentified comparable form
• † Veryhachium
  • † Veryhachium bromidense
  • † Veryhachium irroratum
• † Vesicaspora
  • † Vesicaspora schemelii
  • † Vesicaspora wilsonii
• † Vestispora
  • † Vestispora fenestrata
  • † Vestispora foveata
  • † Vestispora pseudoreticulata
  • † Vestispora wanlessii
• † Victoriacystis
  • † Victoriacystis holmesorum – or unidentified related form
• † Villosacapsula
  • † Villosacapsula entriche
• † Vinella
  • † Vinella bilineata – type locality for species
• † Virginiata
  • † Virginiata arkansana
• † Vittatina
  • † Vittatina costabilis – type locality for species
  • † Vittatina lata – type locality for species
  • † Vittatina simplex
  • † Vittatina verrucosa
• † Vogdesia
  • † Vogdesia bromidensis
• † Voiseyella
  • † Voiseyella novamexicana

W

• † Waagenella
  • † Waagenella crassus – or unidentified comparable form

• 

  † Walchia
  • † Walchia gracilis – or unidentified comparable form
  • † Walchia imbricata – tentative report
• † Walliserodus
• † Watongia – type locality for genus
  • † Watongia meieri – type locality for species
• † Wedekindellina
• † Wellerella
• † Wellergyi
  • † Wellergyi brazerianum
• † Wellerites
  • † Wellerites mohri
• † Wewokella
  • † Wewokella solida
• † Wewokites
  • † Wewokites venatus
• † Whitspakia
  • † Whitspakia schucherti
• † Wichitoceras
  • † Wichitoceras crassum
  • † Wichitoceras decipiens
• † Wiedeyoceras
• † Wilkingia
  • † Wilkingia rothi
• † Wilsonites
  • † Wilsonites delicatus
  • † Wilsonites vesicatus
• † Winchellatina
  • † Winchellatina cornuta
  • † Winchellatina longispina
• † Worthenia
  • † Worthenia tabulata
• † Wurmiella
  • † Wurmiella excavata
  • † Wurmiella posthamata

X

• 

  † Xenacanthus

Y

• † Yochelsonospira
  • † Yochelsonospira thomasi – type locality for species
• Yoldia
• † Youngiella
  • † Youngiella wapanuckensis – type locality for species

Z

• † Zaphrentites
  • † Zaphrentites arkansanus

• 

  † Zatrachys
  • † Zatrachys serratus
• † Zeilleria
• † Zelophyllum
• † Zenocrinus
  • † Zenocrinus zeus – type locality for species
• † Zonalasporites
  • † Zonalasporites punctaticus – type locality for species
  • † Zonalasporites punctatus
• † Zophocrinus
  • † Zophocrinus angulatus
• † Zosterosporites
  • † Zosterosporites triangularis
• † Zygopleura
• † Zygopteris
  • † Zygopteris illinoiensis

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.