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 genusIllustration of a fossilized skull in multiple views of the Permian primitive reptile Acleistorhinus - †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
†AlethopterisFossilized fronds of the Carboniferous-Early Cretaceous seed fern 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
†AnnulariaFossil of the Carboniferous horsetail relative Annularia - †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
†ArchaeocidarisFossilized shell and spines of the Late Devonian-Permian sea urchin 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
†ArchimedesFossils of the Carboniferous-Permian bryozoan 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
†AtrypaFossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa - †Atrypa arctostriata
- †Atrypa oklahomensis
- †Atrypa tennesseensis
- †Atrypina
- †Atrypina hami
- †Aulacotheca – or unidentified comparable form
- †Aurimorpha
- †Aurimorpha varia
- †Auriptygma
- †Austinella
- †Austinella multicostella
†AviculopectenMold fossil of a shell of the Early Devonian-Late Triassic bivalve 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
†BellerophonFossilized shell of the Silurian-Early Triassic mollusc 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
†BolosaurusIllustration of a fossilized skull of the Permian primitive reptile 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
†CacopsLife restoration of the Permian amphibian 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
†CalamitesFossilized stems from the Carboniferous-Permian horsetail relative 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
†CalymeneFossil of the Early Ordovician-Early Devonian trilobite Calymene - †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
†CaptorhinusFossilized skeletons of the Permian reptile 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
†CardiocephalusLife restoration of the Permian amphibian 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
†CeraurusFossil of the Middle-Late Ordovician trilobite 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
†CheirurusFossil of the Cambrian-Middle Devonian trilobite 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
†CladochonusFossil of the Carboniferous tabulate coral 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
†CleiothyridinaFossilized shell of the Middle Devonian-Permian brachiopod 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 genusIllustration of a fossilized cranium of the Permian primitive reptile Colobomycter - †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 genusMounted fossilized skeleton of the Permian synapsid (mammal precursor) Cotylorhynchus - †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
†CricotusIllustration of a fossilized skull and ventral scutes of the Carboniferous-Permian reptile relative Cricotus. Edward Drinker Cope (1884). - †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 nomenclatureFossil of the Carboniferous shark Ctenacanthus - †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
†CyclopterisFossilized foliage from the Carboniferous seed fern 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
†CyphaspisFossil of the Late Ordovician-Late Devonian trilobite 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
†DalmanitesFossil of the Late Ordovician-Middle Devonian trilobite 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 genusInterpretive diagrams and fossils of a skull of the Permian primitive reptile Delorhynchus - †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
†DiadectesFossilized skeleton of the Permian reptile relative 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
†DicranurusDicranurus - †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
†DimetrodonLife restoration of the Permian synapsid (mammal precursor) 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 genusFossilized axial skeleton of the Carboniferous-Permian amphibian Diplocaulus - †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
†EchinosphaeritesFossil of the Early-Middle Ordovician cystoid echinoderm 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
†EdaphosaurusLife restoration of the Carboniferous-Permian synapsid (mammal precursor) Edaphosaurus - †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
†EryopsLife restoration of the Carboniferous-Permian amphibian Eryops - †Escharopora
- †Escharopora recta
- †Estheria
- †Ethelocrinus – tentative report
- †Ethelocrinus kirki
†EucalyptocrinitesFossilized holdfast of the Silurian-Middle Devonian crinoid ("sea lily") 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 genusFossilized skull in multiple views of the Permian primitive reptile Feeserpeton - †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
†FrencrinuroidesFossil in an enrolled posture of the Late Ordovician trilobite 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
†GnathorhizaLife restoration of the Permian lungfish Gnathorhiza - †Gnetalesaccus
- †Gnetalesaccus variabilis
- †Gnorimocrinus
- †Gnorimocrinus pontotocensis
- †Goniasma
†GoniatitesFossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod 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
†GymnophyllumFossils of the Carboniferous coral Gymnophyllum, also known as button coral - †Gypidula
- †Gypidula multicostata
- †Gyronema
H
- †Hagnocrinus
- †Halliella
- †Halliella labiosa
†HalloporaFossil of the Ordovician bryozoan ("moss animal") 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 reportFossilized shells of the Ordovician-Carboniferous sea snail Holopea - †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
†HuntoniatoniaFossil of the Early Devonian trilobite 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
†IllaenusFossil of the Middle Ordovician trilobite 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
†IsotelusFossil of the Middle-Late Ordovician giant trilobite 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
†KainopsFossils of the Early Devonian trilobite 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
†LabidosaurusLife restoration of the Permian reptile 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
†LeonaspisFossil of the Late Ordovician-Middle Devonian trilobite 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
†LepidodendronLife restoration of the Carboniferous tree-sized club moss relative 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
†LingulellaIllustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod 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 genusLife restoration of the Permian amphibian Llistrofus - †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
†LysorophusLife restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior - †Lysorophus tricarinatus
M
- †Maclurites
†MacroleterLife restoration of the Permian primitive reptile 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
†MeristellaIllustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod 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
†MetacocerasFossilized shell of the Carboniferous-Permian nautiloid cephalopod 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 genusLife restoration of the Permian amphibian Micraroter - †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
†MonograptusFossils of the Early Devonian graptolite 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 genusLife restoration of the Permian synapsid (mammal precursor) Mycterosaurus - †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
†NaticopsisFossilized shell of the Early Devonian – Triassic sea snail 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
- †Neostrophia
- †Neostrophia gregaria
- †Neothlipsura
- †Neothlipsura furca
†NeuropterisFronds of the Carboniferous seed fern 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
NuculaInterior of a fossilized shell of the Early Ordovician-modern marine bivalve 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
†OdontochileFossil of the Silurian-Devonian trilobite 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
†OphiacodonLife restoration of the Carboniferous-Permian synapsid (mammal precursor) 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
†OrthacanthusLife restoration of the Carboniferous-Permian freshwater shark 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
†PaciphacopsFossil of the trilobite 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
†PecopterisFossils of the Late Devonian-Permian fern-like fronds 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
†PentremitesFossilized theca of the Carboniferous blastoid echinoderm ("sea bud") 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
†PetalodusFossilized tooth of the Carboniferous-Permian shark 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
†PinnulariaLight micrograph of a Pinnularia alga - †Pirocystella
- †Pisocrinus
- †Pisocrinus quinquelobus
- †Pisocrinus spatulatus
- †Pisocrinus spatulus
- †Pisocrinus tennesseensis
- †Pityosporites
- †Pityosporites westphalensis
- †Placotriplesia
- †Placotriplesia praecipta
†PlaesiomysFossilized shell of the Ordovician brachiopod Plaesiomys - †Plaesiomys bellistriatus
- †Plaesiomys proavitus
- †Plaesiomys subquadrata
- †Plagioglypta
- †Plagioglypta annulostriatum
- †Planisporites
- †Planobola
- †Planobola macrogota
- †Platyceras
- †Platyceras subelegans
†PlatycrinitesThree fossilized calyces of the Devonian-Permian crinoid ("sea lily") 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
†PlatysomusLife restoration of the Carboniferous-Permian bony fish 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
†PleurocystitesFossil of the Late Ordovician cystoid echinoderm 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
†ProetusRestoration of the Silurian trilobite 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
- †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
†RhynchonkosLife restoration of the Permian amphibian 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
RogerellaFossil of the barnacle boring ichnogenus 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
†ScytalocrinusFossilized calyx of the Carboniferous crinoid ("sea lily") 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
†SeymouriaFossilized skeleton of the Permian primitive four-limbed animal Seymouria - †Shaleria – tentative report
- †Shansiella
- †Shansiella carbonaria – tentative report
- †Shumardoceras
- †Sibyrhynchus
- †Sieberella
- †Sieberella roemeri
- †Sievertsia
†SigillariaFossilized stump of the Carboniferous-Permian club moss relative 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
SolecurtusFossilized shells of the marine bivalve 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
†SphaerexochusFossil of the Middle Ordovician-Silurian trilobite Sphaerexochus - †Sphaerexochus glaber
- †Sphaerirhynchia
- †Sphaerirhynchia glomerosa – type locality for species
- †Sphaerirhynchia lindenensis
- †Sphaerocoryphe
- †Sphaerodoma
- †Sphaerodoma gracilis
- †Sphaerolepis
- †Sphaerolepis arctata
†SphenophyllumFossilized leaves and branches of the Devonian-Triassic horsetail relative 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
†SpiriferFossilized shell of the Late Ordovician-Late Triassic brachiopod 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
†StrophomenaFossilized shell of the Ordovician-Silurian brachiopod 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
†TentaculitesFossilized shell of the Early Ordovician-Late Devonian probable mollusc 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
TextulariaFossilized shell of the Carboniferous-modern foraminiferan 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
†TrimerorhachisFossilized skull of the Permian amphibian Trimerorhachis - †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
†UrasterellaFossil of the Ordovician-Devonian sea star Urasterella - †Utharocrinus
- †Utharocrinus pentanodus
V
- †Valcourea
- †Valcourea transversa
†Varanodon – type locality for genusVaranodon - †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
†WalchiaFossilized foliage of the Carboniferous-Permian conifer 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
†XenacanthusRestoration of the Late Devonian–Triassic freshwater shark Xenacanthus
Y
- †Yochelsonospira
- †Yochelsonospira thomasi – type locality for species
- Yoldia
- †Youngiella
- †Youngiella wapanuckensis – type locality for species
Z
- †Zaphrentites
- †Zaphrentites arkansanus
†ZatrachysLife restoration of the Permian amphibian 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
- ^ Michael deBraga; Joseph J. Bevitt; Robert R. Reisz (2019). "A new captorhinid from the Permian cave system near Richards Spur, Oklahoma, and the taxic diversity of Captorhinus at this locality". Frontiers in Earth Science. 7: Article 112. doi:10.3389/feart.2019.00112.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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