List of the Paleozoic life of Pennsylvania

This list of the Paleozoic life of Pennsylvania contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Pennsylvania and are between 538.8 and 252.17 million years of age.

A

 * †Acanthopecten
 * †Acanthopecten carboniferous
 * †Acidaspis
 * †Acidaspis cincinnatiensis
 * †Acrothele
 * †Acrothele decipiens
 * †Acrothele yorkensis
 * †Acrotreta
 * †Actinomylacris
 * †Actinomylacris similis – type locality for species
 * †Actinopteria
 * †Actinopteria boydi
 * †Actinopteria boydii
 * †Actinopteria decussata
 * †Adelphobolbina
 * †Adelphobolbina medialis
 * †Adiantites
 * †Adiantites mirabilis
 * †Adiantites spectabilis – type locality for species
 * †Adiantites ungeri – type locality for species
 * †Adiatites
 * †Adiatites cyclopteroides – type locality for species
 * †Adiatites spectabilis – type locality for species
 * †Aechmina
 * †Agassizocrinus
 * †Ageleodus
 * †Ageleodus pectinatus
 * †Aglaoglypta
 * †Aglaoglypta maera
 * †Aglaoglypta nactoides
 * †Agnostus
 * †Alcicornopteris
 * †Alcicornopteris altoonensis – type locality for species
 * †Alcicornopteris anthracitica – type locality for species
 * Alethopteris PAMuseum.jpg †[[Alethopteris]]
 * †Alethopteris densinervosa
 * †Alethopteris ingbertensis
 * †Alethopteris lonchitifolia
 * †Alethopteris missouriensis
 * †Alethopteris serli
 * †Alethopteris westphalensis
 * †Allanella
 * †Allanella tullius
 * †Alokistocare
 * †Alokistocare aoris – type locality for species
 * †Alokistocare nasutum – type locality for species
 * †Ambocoelia
 * †Ambocoelia gregaria
 * †Ambocoelia umbonata
 * †Amboneura – type locality for genus
 * †Amboneura klosei – type locality for species
 * †Americaspis
 * †Amphiscapha
 * †Amphiscapha catilloides
 * †Amphissites
 * †Anastomopora
 * †Ancyrospora
 * †Aneurospora
 * †Aneurospora greggsii
 * †Anisotrypa
 * †Ankoura
 * †Ankoura apicalis
 * †Ankoura orbiculata – or unidentified comparable form
 * †Ankoura sublettensis
 * AnomalocarisDinoMcanb.jpg †[[Anomalocaris]]
 * †Anomalocaris lineata
 * †Anomomylacris – type locality for genus
 * †Anomomylacris cubitalis – type locality for species
 * †Anoplea
 * †Anoplea nucleata
 * †Anoplotheca
 * †Anthracospirifer
 * †Aparchites
 * †Aparchites subrotunda
 * †Aphthoroblattina
 * †Aphthoroblattina fascigera – type locality for species
 * †Aphyllum
 * †Aphyllum fascicularium
 * †Archaeopteridium
 * †Archaeopteridium bellasylviana – type locality for species
 * †Archaeopteris
 * †Archaeopteris halliana
 * †Archaeopteris latifolia
 * Archaeopteris reconstruction.jpg †[[Archaeopteris macilenta]]
 * †Archaeopteris minor
 * †Archaeopteris roemeriana – or unidentified comparable form
 * †Archaeopteris rogersi
 * †Archaeosperma
 * †Archaeosperma arnoldii
 * †Archaeotriletes
 * †Archaeotriletes senticosus
 * †Archeopteris
 * †Archeopteris latifolia
 * †Archimylacris
 * †Archimylacris parallelum
 * †Archinacella
 * †Armathyraster
 * †Armathyraster paradoxis
 * †Arthrophycus
 * †Articulatae
 * Asaphiscus wheeleri grey CRF.jpeg †[[Asaphiscus]]
 * †Asaphiscus glaber
 * †Asemoblatta – type locality for genus
 * †Asemoblatta pennsylvanica – type locality for species
 * †Astartella
 * †Astartella vera
 * †Atalotaenia – type locality for genus
 * †Atalotaenia adela – type locality for species
 * †Ateleocystites
 * †Ateleocystites huxleyi
 * †Athyris
 * †Athyris angelica
 * †Athyris spiriferiodes
 * †Athyris spiriferoides
 * †Atimoblatta – type locality for genus
 * †Atimoblatta curvipennis – type locality for species
 * †Atimoblatta flexuosa – type locality for species
 * †Atimoblatta reducta – type locality for species
 * †Atlanticocoelia
 * †Atlanticocoelia acutiplicata
 * †Atrypa
 * †Atrypa recticularis
 * Atrypa reticularis pedunculate Gondelsheim CRF.jpg †[[Atrypa reticularis]]
 * †Aulocystis
 * †Auroraspora
 * †Auroraspora hyalina
 * †Auroraspora macra
 * †Auroraspora solisorta
 * †Auroraspora torquata
 * †Aviculopecten
 * †Aviculopecten bellus
 * †Aviculopecten equilatera
 * †Aviculopecten occidentalis

B

 * †Bactrites
 * †Barbclabornia
 * †Barbclabornia luedersensis
 * †Barinophyton
 * †Barinophyton citrulliforme
 * †Barinophyton obscurum
 * †Bathyuriscus
 * †Batostoma
 * Bellerophon umbilicalis.jpg †[[Bellerophon (genus)|Bellerophon]]
 * †Bellerophon clarki
 * †Bellerophon nactus
 * †Bembexia
 * †Bembexia laevis
 * Berenicea
 * †Beyrichoceratoides
 * †Beyrichoceratoides lunatus
 * †Bisporangiostrobus
 * †Bisporangiostrobus harrisii
 * †Blainia
 * †Blainia buttsi – type locality for species
 * †Blairella
 * †Blairella triangularis – type locality for species
 * †Blattoidea
 * †Blattoidea schucherti – type locality for species
 * †Blountia
 * †Blountia prolifica – type locality for species
 * †Blountia waddlensis
 * †Blountia warriorensis – type locality for species
 * †Bollia
 * †Bollia hama
 * †Bollia hindei
 * †Bollia planofibra
 * †Bollia spinomuralis
 * †Bollia ungula
 * †Bolllia
 * †Bolllia ungula
 * †Bonneterrina
 * †Bonneterrina aspinosa – type locality for species
 * †Bonnia
 * †Bonnia bubaris
 * †Bonnia capito
 * †Bonnia senecta – tentative report
 * †Bonniella
 * †Bonniella yorkensis
 * Bothriolepis canadensis fm.jpg Bothriolepis NT small.jpg]] †[[Bothriolepis]]''
 * †Bothriolepis nitida
 * †Bothriolepis nitidus
 * †Brachycycloceras
 * †Brachycycloceras curtum
 * †Brachymylacris
 * †Brachymylacris bassleri – type locality for species
 * †Brachymylacris elongata – type locality for species
 * †Brachymylacris rotundata – type locality for species
 * †Bucanopsis
 * †Bufina
 * †Bufina bicornuta
 * †Burnetiella
 * †Burnetiella ectypa
 * †Burnetiella urania
 * †Buttisia
 * †Buttisia drabensis
 * †Buttsia
 * †Buttsia completa
 * †Buttsia drabensis
 * †Bynumia
 * †Bynumia terrenda
 * †Bynumina
 * †Bynumina terrenda
 * †Bynumina type locality for species – informal
 * †Bynuminia
 * †Bynuminia terrenda
 * †Byronia
 * †Byssonychia – tentative report
 * †Byssonychia vera – or unidentified comparable form
 * Bythocypris

C

 * †Calathiops
 * †Calathiops pottsvillensis – type locality for species
 * †Calathospongia
 * †Calathospongia carceralis
 * †Calathospongia carlli
 * †Calathospongia tidioutensis
 * †Callixylon
 * †Caloneurella – type locality for genus
 * †Caloneurella carbonaria – type locality for species
 * †Calvibembexia
 * †Calvibembexia sulcomarginata
 * †Camaraspis
 * †Camaraspis convexa
 * †Camarotoechia
 * †Camarotoechia constricta
 * †Camarotoechia prolifica
 * †Camarotoechia saxatilis
 * †Camerella
 * Camptostroma copy.jpg †[[Camptostroma]]
 * †Camptostroma roddyi
 * †Cardiocarpon
 * †Cardiocarpon phillipsi – type locality for species
 * †Cariniferella
 * †Cariniferella carinata
 * †Cariniferella tioga
 * †Carydium
 * †Carydium bellastriatum
 * †Cavellina
 * †Cavellina planoprocliva
 * †Cavusgnathus
 * †Centronella
 * †Ceramopora
 * †Ceramopora incondita
 * †Ceratopsis
 * †Ceratopsis chambersi
 * †Ceriocrinus
 * †Chalepomylacris – type locality for genus
 * †Chalepomylacris pulchra – type locality for species
 * †Chancelloria
 * †Chancelloria yorkensis
 * †Chancia
 * †Cheilocephalus
 * †Cheilocephalus quadratus – type locality for species
 * †Chonetes
 * †Chonetes buttsi
 * †Chonetes hemisphericus
 * †Chonetinella
 * †Chonetinella verneuilana
 * †Cincinnaticrinus
 * Cincinnetina meeki (Miller, 1875) slab 3.jpg †[[Cincinnetina]]
 * †Cincinnetina multisecta
 * †Cladopora
 * †Cladopora seriata
 * †Cleiothyridina
 * †Cliffia
 * †Cliffia lataegenae
 * †Cliffia latagenae
 * †Climacograptus
 * †Climacograptus typicalis
 * †Cobaloblatta – type locality for genus
 * †Cobaloblatta simulans – type locality for species
 * Coccosteus cuspidatus.jpg']] †Coccosteus
 * †Coccosteus macromus – type locality for species
 * †Coelacanthus
 * †Coleolus
 * †Colpodexylon
 * †Colpodexylon deatsii
 * †Colpomya
 * †Colpomya faba
 * †Comanchia
 * †Comanchia amplooculata
 * †Composita
 * †Composita subtilita
 * †Conaspis
 * †Conotheca
 * †Conotheca australiensis – or unidentified comparable form
 * †Conularia
 * †Conularia trentonensis – tentative report
 * †Convolutispora
 * †Convolutispora opressa – or unidentified comparable form
 * †Coosella
 * †Coosella convexa – type locality for species
 * †Coosella vulgaris – type locality for species
 * †Coosia
 * †Coosia pustulata – type locality for species
 * †Corbulispora
 * †Corbulispora cancellata
 * Cordaites fossil cropped.png †[[Cordaites]]
 * †Cornellites
 * †Cornellites flabella
 * †Cornulites
 * †Cornulites flexuosus
 * †Cornulites progressus – or unidentified comparable form
 * †Corticospongia – type locality for genus
 * †Corticospongia bradfordensis – type locality for species
 * †Cranaena
 * †Craniops
 * †Craniops hamiltoniae
 * †Craniops subtruncata
 * †Crenistriella
 * †Crenistriella crenistria
 * †Crepicephalus
 * †Crurithyris
 * †Crurithyris planoconvexa
 * †Cryptolithus
 * †Cryptolithus bellulus
 * †Cryptolithus recurvus
 * †Cryptozoon
 * †Cryptozoon undulatum
 * †Ctenerpeton – type locality for genus
 * †Ctenerpeton remex – type locality for species
 * †Ctenoloculina
 * †Ctenoloculina cicatricosa
 * The Eurypterida of New York plate 49.jpg †[[Ctenopterus]]
 * †Ctenopterus cestrotus
 * †Cuneamya
 * †Cupularostrum
 * †Cupularostrum congregata
 * †Cupularostrum contracta
 * †Cupularostrum exima
 * †Cupularostrum orbicularis
 * †Cyclonema
 * †Cyclopteris
 * †Cymatospira
 * †Cymatospira montfortianus
 * †Cypricardella
 * †Cypricardella bellastriata
 * †Cypricardella bellistriata
 * †Cypricardella tenuistriata
 * †Cypricardina
 * †Cypricardina indenta
 * †Cypricardinia
 * †Cypricardinia indenta
 * †Cyrtina
 * †Cyrtina hamiltonensis
 * Cyrtospirifer verneuili duo.jpg †[[Cyrtospirifer]]
 * †Cyrtospirifer disjunctus
 * †Cyrtospora
 * †Cyrtospora cristifera – or unidentified comparable form
 * †Cystihalysites

D

 * †Dawsonia
 * †Dawsonia parkeri
 * †Deadwoodia
 * †Deadwoodia duris
 * †Dechenella
 * †Deckera
 * †Deckera completa
 * †Dekayella
 * †Dellea
 * †Dellea glabellamersa
 * †Dellea rogersi – type locality for species
 * †Dellea saratogensis
 * †Delthyris
 * †Deltodus
 * †Deltodus angularis
 * †Densignathus – type locality for genus
 * †Densignathus rowei – type locality for species
 * †Derbyia
 * †Derbyia crassa
 * †Derbyia robusta
 * †Devonochonetes
 * †Devonochonetes coronatus
 * †Devonochonetes scitulus
 * †Devonochonetes syrtalis
 * †Diacanthaspis
 * †Diaphanospora
 * †Diaphragmus
 * †Dictyomylacris
 * †Dictyotomaria
 * †Dictyotomaria capillaria
 * †Dictyotriletes
 * †Dictyotriletes nefandus
 * †Dieconeurites – type locality for genus
 * †Dieconeurites rigidus – type locality for species
 * †Diplocaulus – or unidentified comparable form
 * Diploceraspis12DB.jpg †[[Diploceraspis]]
 * †Diploceraspis burkei
 * †Diplograptus
 * †Diplograptus nexus
 * †Ditomopyge
 * †Ditomopyge scitulus
 * †Dizygopleura
 * †Dodecaactinella
 * †Dodecaactinella spicules
 * †Dokimocephalus – tentative report
 * †Dokimocephalus intermedius
 * †Douvillina
 * †Douvillina cayuta
 * †Douvillina inaequistriata
 * †Drabia
 * †Drabia acroccipita
 * †Drabia acrocclpita
 * †Drabia acrocclptia
 * †Drabia menusa
 * †Drabia typica
 * †Dunbarella
 * †Dunbarella striata

E

 * †Echinoconchus
 * †Echinoconchus punctatus
 * †Ectenocrinus
 * †Ectenocrinus simplex
 * Edaphosaurus NT small.jpg †[[Edaphosaurus]]
 * †Edaphosaurus raymondi – type locality for species
 * †Edmondia
 * †Eldredgeops
 * †Eldredgeops rana
 * †Elita
 * †Elita fimbriata
 * †Elrathia
 * †Elrathia grazierensis – type locality for species
 * †Elrathina
 * †Elvinia
 * †Elvinia roemeri
 * †Embolophyllum
 * †Embolophyllum clarki
 * †Embolophyllum coralliferum
 * †Embolophyllum schucherti
 * †Emmanuella
 * †Emmanuella subumbona
 * †Emphanisporites
 * †Emphanisporites annulatus – or unidentified comparable form
 * †Emphanisporites pantagiatus – or unidentified comparable form
 * †Emphanisporites rotatus
 * †Endolobus
 * †Endothyra
 * †Endothyranella
 * †Endothyranella nitida – or unidentified comparable form
 * †Endothyranella stormi – or unidentified comparable form
 * †Entellophylloides
 * †Entellophylloides inequalils
 * †Eoagnostus
 * †Eoagnostus roddyi
 * †Eoobolus
 * †Eoobolus priscus
 * †Eoorthis
 * †Eoorthis indianola
 * †Eoserpeton
 * †Eoserpeton tenuicorne – type locality for species
 * †Eothele
 * †Eothele tubulus
 * Erettopterus osiliensis.jpg †[[Erettopterus]]
 * †Erettopterus globiceps
 * †Eryops
 * †Eryops avinoffi
 * †Eshelmania
 * †Esmeraldina
 * †Esmeraldina macer
 * †Euglyphella
 * †Euglyphella numismoides
 * †Eukloedenella
 * †Eumetria
 * †Euomphalus
 * †Eupachycrinus
 * †Euphemites
 * †Euphemites carbonarius

F

 * †Fabreciella – type locality for genus
 * †Fabreciella pennsylvanica – type locality for species
 * FavositesOrdovicianIndiana.jpg †[[Favosites]]
 * †Favosites niagarensis
 * †Fedexia
 * †Fenestella
 * †Fenestella emaciata
 * †Fenestella sinuosa
 * †Fimbrispirifer
 * †Finkelnburgia
 * †Finkelnburgia bridgei – or unidentified comparable form
 * †Fistuliporella
 * †Fistuliporella minima
 * †Fletcherina
 * †Fletcherina incognita – or unidentified comparable form
 * †Floweria
 * †Floweria chemungensis

G

 * †Ganorhynchus
 * †Ganorhynchus oblongus – type locality for species
 * †Geminospora
 * Genevievella granulosa CRF.jpg †[[Genevievella]]
 * †Genevievella campbellina – type locality for species
 * †Genevievella pennstatensis – type locality for species
 * †Genevievella plesiochielus – type locality for species
 * †Gigantocharinus – type locality for genus
 * †Gigantocharinus szatmaryi – type locality for species
 * †Girtya
 * †Girtya pennslvanica
 * †Girtya pennsylvanica – type locality for species
 * †Glabrocingulum
 * †Glabrocingulum grayvillense
 * †Glaphyraspis
 * †Glaphyraspis ovata
 * †Glaukerpeton – type locality for genus
 * †Glaukerpeton avinoffi – type locality for species
 * †Glyptocrinus
 * †Glyptodesma
 * †Glyptodesma erectum – tentative report
 * †Gnathodus
 * †Goniomylacris – type locality for genus
 * †Goniomylacris pauper – type locality for species
 * †Goniophora
 * †Goniophora hamiltonensis
 * †Grandispora
 * †Grandispora cornuta
 * †Grandispora upensis
 * [[File:Gravicalymene yamakoshii - National Museum of Nature and Science, Tokyo - DSC07017 cropped.jpg|thumb|upright|Fossils of the Middle Ordovician-Early Devonian trilobite Gravicalymene]] †[[Gravicalymene]]
 * †Greenops
 * †Greenops boothi

H

 * †Hadrotreta
 * Stylonurus_BW.jpg †[[Hallipterus]]
 * †Hallipterus lacoanus
 * †Hapaloptera – type locality for genus
 * †Hapaloptera gracilis – type locality for species
 * †Hardieopterus
 * †Hardieopterus myops
 * †Hazelia
 * †Hazelia walcotti
 * †Healdia
 * †Helcionella
 * †Hemimylacrella
 * †Hemimylacrella mammothi – type locality for species
 * †Hemimylacris
 * †Hemimylacris ramificata – type locality for species
 * †Herrmannina
 * †Heslerodus
 * †Heslerodus divergens
 * †Hexactinellid
 * †Hexactinellid spicules
 * †Hibbardella
 * †Hibbardia
 * †Hibbardia lacrimosa
 * †Hindeodus
 * †Holcacephalus
 * †Holcacephalus tunda
 * †Hollinella
 * †Hollinella sella – or unidentified comparable form
 * †Hollinella tricollina
 * Holonema westolli.jpg †[[Holonema]]
 * †Holonema horrida – type locality for species
 * †Holonema rugosa
 * †Holopea
 * †Holoptychius
 * †Holoptychius americanus
 * †Holoptychius filosus – type locality for species
 * †Holoptychius giganteus
 * †Holoptychus
 * †Holoptychus flabellatus – type locality for species
 * †Holoptychus latus – type locality for species
 * †Holoptychus serrulatus – type locality for species
 * †Homacanthus
 * †Homacanthus acinaciformis – type locality for species
 * †Homilodonta
 * †Homilodonta filistriata
 * †Hostimella
 * †Hostimella crispa
 * †Housia
 * †Housia vacuna
 * †Hudsonaster
 * †Hudsonaster lancolatus – or unidentified comparable form
 * †Hughmilleria
 * †Hughmilleria shawangunk
 * †Hymenocaris
 * †Hymenozonotriletes
 * †Hymenozonotriletes explanatus
 * †Hymenozonotriletes granulatus
 * Hynerpeton BW.jpg †[[Hynerpeton]] – type locality for genus
 * †Hynerpeton bassetti – type locality for species
 * †Hyolithellus
 * †Hyolithellus micans
 * †Hyolithes
 * †Hyolithes wanneri
 * †Hyolithid
 * †Hypselentoma
 * †Hypselentoma perhumerosa
 * †Hystricosporites
 * †Hystricosporites multifurcatus
 * †Hystricosporites porcatus
 * †Hystriculina
 * †Hystriculina wabashensis

I

 * †Ianthinopsis
 * †Iddingsia
 * †Iddingsia anatina
 * †Idiomylacris – type locality for genus
 * †Idiomylacris gracilis – type locality for species
 * †Imlerella
 * †Imlerella praecipita – type locality for species
 * †Indiana – tentative report
 * †Inflatia
 * †Inocaulis
 * †Iocrinus
 * †Iocrinus subcrassus
 * †Irvingella
 * †Irvingella major
 * Isodectes obtusus.jpg †[[Isodectes]]
 * †Isodectes obtusus – type locality for species
 * †Isotelus
 * †Isotelus gigas
 * †Ithycephalus

K

 * †Katabuporhynchus
 * †Katabuporhynchus mesacostalis
 * The Eurypterida of New York plate 46.jpg †[[Kiaeropterus]]
 * †Kiaeropterus otisius
 * †Kindbladia
 * †Kindbladia wichitaensis
 * †Kingstonia
 * †Kingstonia apion
 * †Kingstonia ara
 * †Kingstonia cheilusis – type locality for species
 * †Kingstonia trapezoidia – type locality for species
 * †Kingstonia ulrichi – type locality for species
 * †Kingstonia walcotti
 * †Kinklidoblatta
 * †Kinklidoblatta lesquereuxi – type locality for species
 * †Kinocera – tentative report
 * †Kinzercystis
 * †Kinzercystis durhami
 * †Kinzeria – type locality for genus
 * †Kinzeria crinita – type locality for species
 * †Kladognathus
 * †Kloedinia
 * †Knoxisporites
 * †Knoxisporites dedaleus
 * †Kochiella
 * Kootenia fossil cropped.png †[[Kootenia]]
 * †Kootenia marcoui
 * †Kraeuselisporites
 * †Kutorgina
 * †Kutorgina cingulata
 * †Kutorgina edsoni
 * †Kyphocephalus

L



 * †Lacoea
 * †Lacoea seriata – type locality for species
 * †Lagenospermum
 * †Lagenospermum imparirameum
 * †Lambdagnathus
 * †Lancastria
 * †Lecanospira
 * †Lecanospira compacta
 * †Lecanospira salteri – or unidentified comparable form
 * †Leiorhynchus
 * †Leiozonotriletes
 * †Lepdidodendropsis
 * †Leperditia
 * †Lepidocystis
 * †Lepidocystis wanneri
 * †Lepidodendropsis
 * †Lepidodendropsis scobiniformis
 * †Lepidodendropsis stigillariodes
 * †Lepidodendropsis stigillaroides
 * †Lepidodendropsis vandergrachti
 * †Lepidostrobus
 * †Lepidostrobus gallowayi
 * †Leptaena
 * †Leptaena rhomboidalis
 * †Leptaena richmondensis – or unidentified comparable form
 * †Leptodesma
 * †Leptodesma cadmus
 * †Leptodesma extenuatum
 * †Leptodesma hector
 * †Leptodesma laevis
 * †Leptodesma lichas
 * †Leptodesma maclurii
 * †Leptodesma mortoni
 * †Leptodesma naviforme
 * †Leptodesma nereus
 * †Leptodesma nitida
 * †Leptodesma orus
 * †Leptodesma patulum
 * †Leptodesma pelops
 * †Leptodesma phaon
 * †Leptodesma sayi
 * †Leptodesma sociale
 * †Leptodesma spinerigum
 * †Leptomitus
 * †Lichenocrinus
 * Lingula
 * †Lingula carbonaria
 * †Lingula delia
 * †Lingula ligea
 * Lingulella caelata 1.png †[[Lingulella]]
 * †Lingulella marcia – or unidentified comparable form
 * †Lingulepis
 * †Lingulepis acuminata
 * †Linoproductus
 * †Linoproductus cora
 * †Liospira
 * †Liospira americana
 * †Llanoaspidella – type locality for genus
 * †Llanoaspidella bigenusia – type locality for species
 * †Llanoaspidella warriorsmarkensis – type locality for species
 * †Llanoaspis – tentative report
 * †Lonchocephalus
 * †Lonchocephalus planus – type locality for species
 * †Lonchocephalus swartzi – type locality for species
 * †Lonchocephalus waddlei – type locality for species
 * †Longispina
 * †Longispina mucronatus
 * †Lophophyllidium
 * †Lophophyllidium profundum
 * †Lophospira
 * †Lophozonotriletes
 * †Lophozonotriletes excisus
 * †Lophozonotriletes tuberosus
 * †Loxonema
 * Lysorophus.jpg †[[Lysorophus]]
 * †Lysorophus dunkardensis

M

 * †Macluritella – tentative report
 * †Macluritella multiseptarius
 * †Maeneceras
 * †Maeneceras milleri
 * †Margaretia
 * †Mariopteris
 * †Martinia
 * †Mediospirifer
 * †Mediospirifer audaculus
 * †Mediospirifer belliplicata
 * †Mediospirifer bellitropis
 * †Mediospirifer dromgoldi
 * †Megakozlowskiella
 * †Megakozlowskiella sculptilis
 * Megalograptus.jpg †[[Megalograptus]] – tentative report
 * †Megamolgophis
 * †Megamolgophis agostinii
 * †Megastrophia
 * †Menomonia
 * †Menomonia calymenoides
 * †Mesitoblatta
 * †Mesitoblatta emersoni – type locality for species
 * †Mesotaphraspis
 * †Metacoceras
 * †Metacoceras cornutum
 * †Metaxyblatta – type locality for genus
 * †Metaxyblatta hadroptera – type locality for species
 * †Metropator – type locality for genus
 * †Metropator pusillus – type locality for species
 * †Michelinoceras
 * †Micromitra
 * †Micromitra alabamensis
 * †Mimagoniatites – tentative report
 * †Modiella
 * †Modiella pygmaea
 * †Modiolopsis
 * †Modiomorpha
 * †Modiomorpha concentrica
 * †Modocia
 * †Modocia benorensis – type locality for species
 * †Monotrypa
 * †Monotrypa benjamini
 * Mucrospirifer mucronatus Silica Shale.JPG  †[[Mucrospirifer]]
 * †Mucrospirifer mucronatus
 * †Mylacridae
 * †Mylacridae carbonina
 * †Mylacris
 * †Mylacris angusta – type locality for species
 * †Mylacris anthracophila – type locality for species
 * †Mylacris dubia – type locality for species
 * †Mylacris lucifuga – type locality for species
 * †Mylacris ovalis – type locality for species
 * †Mylacris pennsylvanica – type locality for species
 * †Mylacris truncatula – type locality for species

N

 * †Nalivkinella
 * †Nalivkinella echoense
 * †Nanahughmilleria
 * †Nanahughmilleria clarkei
 * †Naticonema
 * Neritopsidae - Naticopsis.JPG †[[Naticopsis]]
 * †Necymylacris
 * †Necymylacris heros – type locality for species
 * †Necymylacris lacoana – type locality for species
 * †Neoblairella – type locality for genus
 * †Neoblairella crassimarginata – type locality for species
 * †Neochonetes
 * †Neochonetes granulifer
 * †Neomylacris
 * †Neomylacris major – type locality for species
 * †Neomylacris pulla – type locality for species
 * †Neoprionodus
 * †Neoraistrickia
 * †Neosimplicius – type locality for genus
 * †Neosimplicius medialis – type locality for species
 * †Neospirifer
 * †Neospirifer cameratus
 * †Neriopteris
 * †Neriopteris lanceolata
 * †Nervostrophia
 * †Nervostrophia nervosa
 * Neuropteris PAMuseum.jpg †[[Neuropteris]]
 * †Nisusia
 * †Nisusia festinata
 * Nucula
 * †Nucula bellistriata
 * †Nucula lirata
 * Nuculana
 * †Nuculites
 * †Nuculites oblongatus
 * †Nuculites planulatus
 * †Nuculites triqueter
 * †Nuculopsis
 * †Nuculopsis girtyi

O

 * †Octonaria
 * †Octonaria bifurcata
 * †Octonaria dicristata
 * †Octonaria quadricostata
 * †Ogygopsis
 * †Ogygopsis klotzi
 * †Olenellus
 * †Olenellus alius
 * †Olenellus similaris
 * †Olenellus wanneri
 * [[File:Olenoides superbus, Late Middle Cambrian, Upper Marjum Formation, House Range, Millard County, Utah, USA - Houston Museum of Natural Science - DSC01415.JPG|thumb|upright=0.672|Fossil of the Cambrian trilobite Olenoides]] †[[Olenoides]]
 * †Olenoides buttsi – type locality for species
 * †Olenoides pennsylvanicus – type locality for species
 * †Olenoides serratus
 * †Olethroblatta
 * †Olethroblatta americana – type locality for species
 * †Orbiculoidea
 * †Orbiculoidea tullia
 * †Orsadesmus – type locality for genus
 * †Orsadesmus rubecollus – type locality for species
 * Orthacanthus BW.jpg †[[Orthacanthus]]
 * †Orthacanthus compressus
 * †Orthacanthus platypternus
 * †Orthacanthus texensis
 * †Orthoceras
 * †Orthograptus
 * †Orthograptus quadrimucronatus
 * †Orthomylacris
 * †Orthomylacris alutacea – type locality for species
 * †Orthomylacris analis – type locality for species
 * †Orthomylacris cordiformis – type locality for species
 * †Orthomylacris mansfieldi – type locality for species
 * †Orthomylacris pauperata – type locality for species
 * †Orthomylacris pennsylvaniae – type locality for species
 * †Orthomylacris pittstoniana – type locality for species
 * †Orthomylacris pluteus – type locality for species
 * †Orthonota
 * †Orthonota parvula – tentative report
 * †Orthonota undulata
 * †Orthonychia
 * †Orthonychia parva
 * †Orthotetes
 * †Orthotheca
 * †Orthotheca shriveri – type locality for species
 * †Oryctocephalus
 * Osteolepis BW.jpg †Osteolepis
 * †Oulodus
 * †Ovatia
 * †Oxynoblatta
 * †Oxynoblatta vicina – type locality for species
 * †Ozarkodina

P

 * †Paedeumias
 * †Paedeumias eboracense
 * †Paedeumias glabrum
 * †Paedeumias yorkense
 * Pagetia taijiangensis 2.jpg †[[Pagetia]]
 * †Paladin
 * †Palaeoneilo
 * †Palaeoneilo constricta
 * †Palaeoneilo fecunda
 * †Palaeoneilo muta
 * †Palaeoneilo oweni
 * †Palaeoneilo plana
 * †Palaeoneilo tenuistriata
 * †Palaeotherates
 * †Palaeotherates pennsylvanicus – type locality for species
 * †Palaeozygopleura
 * †Palaeozygopleura delphicola
 * †Panenka
 * †Parabolbina
 * †Parabolbina cardocornella
 * †Parabolbina obliqua
 * †Parabolinella
 * †Parabolinella occidentalis
 * †Parabolinoides
 * †Paracyclas
 * †Paracyclas lirata
 * †Parahaplophlebium
 * †Parahaplophlebium longipenne – type locality for species
 * †Parahughmilleria
 * †Parahughmilleria maria
 * †Parajuresania
 * †Parajuresania nebrascensis
 * †Parallelodon
 * †Parallelodon obsoletus
 * †Paranacystites
 * [[File:Paraspirifer bownockeri, pyritized brachiopods, Middle Devonian, Silica Shale, Lucas County, Ohio, USA - Houston Museum of Natural Science - DSC01732.JPG|thumb|upright=0.745|Assemblage of the Early-Middle Devonian brachiopod Paraspirifer]] †[[Paraspirifer]]
 * †Paraspirifer acuminatus
 * †Parvohallopora
 * †Parvohallopora dalei – or unidentified comparable form
 * †Paterina
 * †Paterina bella
 * †Pelagiella
 * †Pemphigaspis
 * †Pemphigaspis bullata
 * †Pemphigaspis intermedia – type locality for species
 * †Pemphigaspis matutina
 * †Penniretepora
 * Pentremites Glen Dean Fm KY.jpg †[[Pentremites]]
 * †Periomella
 * †Periomella roddyi
 * †Periomella yorkensis
 * †Peronopsis
 * †Petalodus
 * †Petalodus ohioensis
 * †Petrocrania
 * Phacops rana.jpg]]  †Phacops''
 * †Pharkidonotus
 * †Pharkidonotus percarinatus
 * †Phestia
 * †Philhedra
 * †Philhedra laelia – or unidentified comparable form
 * †Phoberoblatta – type locality for genus
 * †Phoberoblatta grandis – type locality for species
 * †Phoberoblatta reticulata – type locality for species
 * †Pholidops
 * †Pholidostrophia
 * †Pholidostrophia pennsylvanica
 * †Phragmactis
 * †Phricodothyris
 * †Phthinomylacris
 * †Phthinomylacris medialis – type locality for species
 * †Phthinomylacris pauper – type locality for species
 * †Phthonia
 * †Phthonia sectifrons
 * †Phyloblatta
 * †Phyloblatta indecisa – type locality for species
 * †Phyloblatta prior – type locality for species
 * †Pinctus
 * †Pinctus latus
 * Pinna
 * †Pionoceras
 * †Pionoceras swartzi
 * †Plagioblatta
 * †Plagioblatta campbelli – type locality for species
 * †Plagioblatta cockerelli – type locality for species
 * †Plagioglypta
 * †Plagioglypta meekiana
 * †Planoendothyra – tentative report
 * †Planoendothyra associata
 * †Planutenia
 * †Planutenia flectata
 * †Plasiochiton – type locality for genus
 * †Plasiochiton curiosus – type locality for species
 * PlatycerasLoganOhio.jpg †[[Platyceras]]
 * †Platyceras euomphaloides
 * †Platyceras lineatum
 * †Platylichas
 * †Plectorthis
 * †Plectorthis plicatella
 * †Pleurodictyum
 * †Pleurodictyum styloporum
 * †Polidevcia
 * †Polidevcia bellistriata
 * †Poliella
 * †Poliella bala
 * †Polypora
 * †Ponderodictya
 * †Ponderodictya favulosa
 * †Ponderodictya punctulifera
 * †Poroblattina
 * †Poroblattina parvula – type locality for species
 * †Praewaagenoconcha
 * †Praewaagenoconcha speciosa
 * †Primitiella
 * †Primitiella unicornis
 * †Prismopora
 * †Productella
 * †Productella rectispina
 * †Productus
 * Proetus concinnus reconstruction cropped.png †[[Proetus (trilobite)|Proetus]]
 * †Proetus haldemani – tentative report
 * †Proetus parviusculus
 * †Prolepidodendron
 * †Prolepidodendron breviinternodium
 * †Promopalaeaster
 * †Promopalaeaster bellulus
 * †Promopalaeaster pricei
 * †Promytilus
 * †Protobarinophyton
 * †Protobarinophyton pennsylvanicum
 * Protocaris marshi.png †[[Protocaris]]
 * †Protocycloceras
 * †Protocycloceras rushense
 * †Protoleptostrophia
 * †Protoleptostrophia perplana
 * †Protomya – or unidentified comparable form
 * †Protospongia – tentative report
 * †Prozacanthoides
 * †Pseudoatrypa
 * †Pseudoatrypa devoniana
 * †Pseudolingula
 * †Pseudolingula rectilateralis
 * †Pseudopaolia
 * †Pseudopaolia lacoana – type locality for species
 * †Pseudopolyernus
 * †Pseudopolyernus laminarum – type locality for species
 * †Pseudosaratogia
 * †Pseudosaratogia bulbosa
 * †Pseudosaratogia lata – tentative report
 * †Pseudosaratogia magna
 * †Pseudotealliocaris
 * †Pseudotealliocaris palincsari
 * †Pteridomylacris – type locality for genus
 * †Pteridomylacris paradoxa – type locality for species
 * †Pterinea
 * †Pterinopecten
 * †Pterinopecten hermes
 * †Pterinopecten princeps
 * †Pterochaenia
 * †Pterygometopus
 * †Pterygometopus achates
 * †Ptilograptus
 * †Ptilomylacris – type locality for genus
 * †Ptilomylacris medialis – type locality for species
 * †Ptilopora
 * †Ptomatis
 * †Ptychoglyptus
 * †Ptychoglyptus virginensis – or unidentified comparable form
 * †Ptychoparella
 * †Ptychoparella lancastra
 * †Ptychopteria
 * †Ptychopteria chemungensis
 * †Ptychopteria flabella
 * †Ptychopteria salamanca
 * †Ptylopora
 * †Pugnax
 * †Pugnax pugnus
 * †Pustula
 * †Pustula pertenuis
 * †Pustulatia
 * †Pustulatia pustulosa

Q

 * †Quasillites

R

 * †Rafinesquina
 * †Rafinesquina alternata
 * †Retichonetes
 * †Retichonetes marylandicus
 * †Retichonetes vicinus
 * †Retispira
 * †Retispira marcouianus
 * †Retusotriletes
 * †Retusotriletes phillipsii
 * †Rhacophyton
 * †Rhacopteris
 * †Rhinidictya
 * The Eurypterida of New York plate 36 cropped.png †[[Rhinocarcinosoma]]
 * †Rhinocarcinosoma cicerops
 * †Rhipidomella
 * †Rhipidomella leucosia
 * †Rhipidomella penelope
 * †Rhipidomella vanuxemi
 * †Rhodea
 * †Rhodea alleghanensis – type locality for species
 * †Rhodea tionestana – type locality for species
 * †Rhodea vespertina – type locality for species
 * †Rhombopora
 * †Rhytimya
 * †Rhytimya radiata
 * †Ribeiria
 * †Ribeiria parva – or unidentified comparable form
 * †Roddyia
 * †Rodea (genus)
 * †Rodea vespertina – type locality for species
 * †Ruedemannipterus
 * †Ruedemannipterus stylonuroides
 * †Rugospora
 * †Rugospora flexuosa

S

 * Salterella pulchella.png †[[Salterella]]
 * †Salterella acervulosa
 * †Salterella conulata
 * †Salterella mccullochi
 * †Salterella pulchella
 * †Sanguinolites
 * †Sapphicorhynchus
 * †Sapphicorhynchus sappho
 * †Saratogia
 * †Saratogia type locality for species – informal
 * Sauripteris taylori.JPG †[[Sauripterus]]
 * †Sauripterus taylori
 * †Schaefferia (Paleozoic plant) – or unidentified comparable form
 * †Schizoblatta
 * †Schizoblatta pennsylvanica – type locality for species
 * †Schizodiscus
 * †Schizodiscus capsa
 * †Schizodus
 * †Schizodus cuneatus
 * †Schizophoria
 * †Schizophoria amanaensis
 * †Schizophoria impressa
 * †Schizophoria striatula
 * †Schuchertella
 * †Schuchertella parva
 * †Schuchertella variabilis
 * †Schuchertia
 * †Schuchertia laxata
 * †Sciadophyton
 * †Secarisporites
 * †Selkirkia
 * †Septopora
 * †Serracaris
 * †Shansiella
 * †Shansiella carbonaria
 * Walcott Cambrian Geology and Paleontology II plate 02 cropped.jpg †[[Sidneyia]]
 * †Sigillaria
 * †Sinochonetes
 * †Sinochonetes lepidus
 * †Sinuites
 * †Sinuites cancellatus
 * †Soleniscus
 * †Soleniscus primogenia
 * †Soleniscus typicus
 * †Solenochilus
 * †Solenochilus collectum
 * †Solenopleurella
 * †Solenopleurella elatifrons – type locality for species
 * †Solenopleurella transversa – type locality for species
 * †Solutotherates
 * †Solutotherates analis – type locality for species
 * †Sowerbyella
 * †Sowerbyella plicatellus
 * †Sowerbyella rugosa
 * †Spathognathodus
 * †Spelaeotriletes
 * †Spelaeotriletes crustalus
 * †Spelaeotriletes resolutus
 * †Sphenomylacris
 * †Sphenomylacris singularis – type locality for species
 * †Spinatrypa
 * †Spinatrypa hystrix
 * †Spinatrypa spinosa
 * †Spinocyrtia
 * †Spinocyrtia girtyi
 * †Spinocyrtia granulosa
 * †Spinocyrtia macbridei
 * †Spinulicosta
 * †Spinulicosta spinulicosta
 * Spirifer perlamosus pedunculate valve.jpg †[[Spirifer]]
 * †Spirifer disjunctus
 * †Spirifer varicosa
 * †Spongophylloides
 * †Spyroceras
 * †Spyroceras nuntium
 * †Stauromatidium
 * †Stauromatidium marylandicum
 * †Stemtonoceras
 * †Stemtonoceras elongatum
 * †Stenomylacris – type locality for genus
 * †Stenomylacris elegans – type locality for species
 * †Stereolasma
 * †Stittaspis
 * †Stittaspis loria – type locality for species
 * †Straparollus
 * †Striacoceras
 * †Striacoceras typum – tentative report
 * †Strobeus
 * †Strobeus paludinaeformis
 * †Strophalosia
 * †Strophalosia truncata
 * †Stropheodonta
 * †Stropheodonta demissa
 * Strophomena costellata brachial.jpg †[[Strophomena]]
 * †Styliolina
 * †Styliolina bellistriata
 * †Styliolina fissurella
 * †Subrensselandia
 * †Subrensselandia claypolii
 * †Sulcocephalus
 * †Sulcocephalus candidus
 * †Sulcocephalus granulosus
 * †Sulcoretepora
 * †Sulcoretepora incisurata
 * †Sulcoretepora sinuosa – or unidentified comparable form
 * †Swataria – type locality for genus
 * †Swataria derstleri – type locality for species
 * †Syntrophina
 * †Syscioblatta
 * †Syscioblatta allegheniensis – type locality for species
 * †Syscioblatta pennsylvanica – type locality for species

T

 * †Tabulipora
 * †Taeniaster
 * †Taeniaster maximus
 * †Taenicephalus
 * †Taenicephalus shumardi
 * Taeniocrada decheniana cropped.jpg †[[Taeniocrada]]
 * †Taeniopora
 * †Taeniopora exigua
 * †Taonurus
 * †Tellinopsis
 * †Temnocheilus
 * †Temnocheilus crassus
 * †Tentaculites
 * †Tentaculites attenuatus
 * †Tetradella
 * †Tetradella multipustulosa
 * †Tetraxylopteris
 * †Thlipsura
 * †Thlipsura ultimata
 * †Thlipsurella
 * †Thlipsurella semipunctata
 * †Titanodictya
 * †Titanodictya jucunda – type locality for species
 * †Titusvillia – type locality for genus
 * †Titusvillia drakei – type locality for species
 * †Trepospira
 * †Trepospira illinoisensis
 * Triarthrus becki.jpg †[[Triarthrus]]
 * †Triarthrus becki
 * †Tricrepicephalus
 * †Tricrepicephalus arcuatus – type locality for species
 * †Trimerus
 * †Trimerus dekayi
 * †Triphyllopteris
 * †Triphyllopteris biloba – type locality for species
 * †Triphyllopteris latilobata – type locality for species
 * †Triphyllopteris latilobatus
 * †Triphyllopteris lescuriana
 * †Trocophyllum
 * †Trocophyllum breviinternodium
 * †Tropidoleptus
 * †Tropidoleptus carinatus
 * †Truncalosia
 * †Truncalosia truncata
 * †Truncatiramus – now regarded as a jr. synonym of Erettopterus
 * †Tryplasma
 * †Tubulella
 * †Tuzoia
 * †Tylothyris
 * †Tylothyris mesacostalis
 * †Tylothyris pauliformis

U

 * †Ulrichia
 * †Ulrichia elongata
 * †Ulrichia spinifera
 * Urasterella asperula.jpg †[[Urasterella]]
 * †Urasterella pulchella

V

 * †Vallatisporites
 * †Vallatisporites pusilites
 * †Vernonaspis
 * †Verrucosisporites
 * †Verrucosisporites nitidus
 * †Verrucosisporites scurrus
 * †Vinella

W

 * Wanneria walcottana negative CRF.jpg †[[Wanneria]]
 * †Wanneria walcottana
 * †Warrenella
 * †Warrenella laevis
 * †Welleraspis
 * †Welleraspis newfoundlandensis – or unidentified comparable form
 * †Whidbornella
 * †Whidbornella lachrymosa
 * †Wilkingia
 * †Wilkingia terminale
 * †Worthenia
 * †Worthenia tabulata

X

 * †Xenoblatta
 * †Xenoblatta pennsylvanica – type locality for species
 * †Xenocheilos
 * †Xenocheilos spineum

Y

 * Yochelcionella cyrano.JPG †[[Yochelcionella]]
 * †Yochelcionella americana – type locality for species
 * †Yochelcionella chinensis
 * †Yochelcionella greenlandica
 * †Yorkia
 * †Yorkia wanneri

Z

 * †Zaphrenthis
 * †Zelophyllia
 * †Zelophyllum
 * †Zygospira