List of the Paleozoic life of Minnesota

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

A

 * †Abludoglyptocrinus –
 * †Abludoglyptocrinus charltoni
 * †Acanthocrania
 * †Acanthocrania granulosa
 * †Acanthocrania setigeria
 * †Acanthoparypha
 * †Acanthoparypha evetti
 * †Actinoceras
 * †Actinoceras beloitense
 * †Actinoceras bigsbyi
 * †Actinoceras gravicentrum
 * †Actinoceras janesvillensis
 * †Actinodiscus
 * †Aechmina
 * †Aechmina cuspidata
 * †Aechmina ionensis
 * †Agelacrinites
 * †Alaskadiscus
 * †Alaskadiscus subacutus
 * †Allodesma – type locality for genus
 * †Allodesma subellipticum – type locality for species
 * †Allumettoceras
 * †Allumettoceras carletonense – or unidentified comparable form
 * †Allumettoceras planodorsatum
 * †Ambonychia
 * †Ambonychia tenuis
 * †Ambonychiopsis
 * †Amecystis
 * †Amecystis woodi
 * †Americoncha
 * †Americoncha marginata
 * †Amorphognathus
 * †Amorphognathus superbus
 * †Amphilichas
 * †Amphilichas cucullus – or unidentified comparable form
 * †Amygdalocystites
 * †Anaspyroceras
 * †Anaspyroceras anellus
 * †Anaspyroceras calvini
 * †Anaspyroceras clermontense
 * †Anaspyroceras perroti
 * †Anazyga
 * †Anazyga recurvirostra
 * †Anolotichia
 * †Anolotichia impolita
 * †Antiplectoceras – tentative report
 * †Anulocrinus
 * †Anulocrinus forrestonensis
 * †Aparchites
 * †Aparchites barbatus
 * †Aparchites carinatus
 * †Aparchites chatfieldensis
 * †Aparchites ellipticus
 * †Aparchites fimbriatus
 * †Aparchites macrus
 * †Aparchites paratumida
 * †Apycnodiscus
 * †Archaeocrinus
 * †Archaeocrinus obconicus
 * †Archinacella
 * †Archinacella cingulata
 * †Archinacella deleta
 * †Archinacella simplex
 * †Archinacella simulatrix
 * †Archinacella valida
 * †Aristerella
 * †Armenoceras
 * †Armenoceras clermontense
 * †Armenoceras iowense
 * †Arthroclema
 * †Arthroclema armatum
 * †Arthropora
 * †Arthropora simplex
 * †Arthrostylus
 * †Arthrostylus conjunctus
 * †Arthrostylus obliquus
 * †Aspidopora
 * †Astreptodictya
 * †Astreptodictya acuta
 * †Astreptodictya elegans
 * †Astreptodictya fimbriata
 * †Astreptodictya pumila
 * †Astrocystites
 * †Ateleocystites
 * †Ateleocystites guttenbergensis
 * †Athrophragma
 * †Athrophragma foliata
 * †Austinella
 * †Austinella kankakensis –

B

 * †Bairdiocypris –
 * †Bairdiocypris granti
 * †Basilicus
 * †Basilicus barrandi
 * †Bassleratia
 * †Bassleratia typa
 * †Bathyurus
 * †Bathyurus longispinus
 * †Batostoma
 * †Batostoma fertile
 * †Batostoma magnopora
 * †Batostoma winchelli
 * †Bellimurina
 * †Bellimurina charlottae
 * †Bellornatia
 * †Bellornatia tricollis
 * †Belodina
 * †Belodina compressa
 * †Belodina confluens
 * †Beloitoceras
 * †Beloitoceras carveri
 * †Beloitoceras grafense
 * †Beloitoceras houghtoni
 * †Beloitoceras huronense – or unidentified comparable form
 * †Beloitoceras janesvillense
 * †Beloitoceras lycum
 * †Beloitoceras norwoodi
 * †Beloitoceras pandion
 * †Beloitoceras plebeium
 * †Beloitoceras whitneyi
 * †Berkeia – type locality for genus
 * †Berkeia typica – type locality for species
 * †Beyrichia
 * †Beyrichia irregularis
 * †Bodeiceras
 * †Bodeiceras oxygonium
 * †Bollia
 * †Bollia regularis
 * †Bollia ruthae
 * †Bollia subaequata
 * †Bollia subaequeata
 * Britannica Echinoderma 5.jpg †[[Bothriocidaris]]
 * †Bothriocidaris solemi
 * †Brachytomaria
 * †Brachytomaria semele
 * †Bromidella
 * †Bromidella depressa
 * †Bromidella rhomboides
 * †Bryantodina
 * †Bryantodina abrupta
 * †Bryantodina typicalis
 * †Bucania
 * †Bucania elliptica
 * †Bucania halli
 * †Bucania minnesotensis
 * †Bucania sublata
 * †Bullatella
 * †Bullatella granilabiatus
 * †Bullatella granlabiatus
 * †Bumastoides
 * †Bumastoides milleri
 * †Bumastoides porrectus
 * Trilobite - Bumastus reconstruction 3d.jpg †[[Bumastus]]
 * †Bumastus orbicaudatus
 * †Byrsolopsina
 * †Byrsolopsina centipunctata
 * †Byrsolopsina normella
 * †Byrsolopsina ovata
 * †Byrsolopsina planilateralis
 * Bythocypris
 * †Bythocypris curta
 * †Bythocypris furnishi
 * †Bythopora
 * †Bythopora subgracilis –

C

 * †Calceocrinus
 * †Calceocrinus gossmani
 * †Calceocrinus levorsoni
 * Calymene clavicula dorsal.jpg †[[Calymene]]
 * †Calymene mamillate
 * †Calymene winchelli
 * †Camaraspis
 * †Camaraspis convexus
 * †Camaraspoides
 * †Camaraspoides berkeyi
 * †Camellaspongia – type locality for genus
 * †Camellaspongia tumula – type locality for species
 * Cameroceras trentonese.jpg †[[Cameroceras]]
 * †Cameroceras alternatum – or unidentified comparable form
 * †Cameroceras hennepini
 * †Cameroceras inopinatum – type locality for species
 * †Cameroceras stillwaterense – type locality for species
 * †Campylorthis
 * †Campylorthis deflecta
 * †Carabocrinus
 * †Carabocrinus dicyclicus
 * †Carabocrinus magnificus
 * †Carabocrinus oogyi
 * †Carabocrinus radiatus
 * †Carabocrinus slocomi
 * †Carinaropsis
 * †Carinaropsis cymbula
 * †Carinaropsis minima
 * †Cataschisma
 * †Cataschisma convexum
 * †Centrocyrtoceras
 * †Centrocyrtoceras annulatum
 * †Centrocyrtoceras duplicostatum
 * †Centrocyrtoceras rotundum
 * †Ceratopea
 * †Ceratopea canadensis
 * †Ceratopea parvum – type locality for species
 * †Ceratopea pygmaea – type locality for species
 * †Ceratopsis
 * †Ceratopsis chambersi
 * †Ceratopsis humilinoda
 * †Ceratopsis quadrifida
 * †Ceraurinella
 * †Ceraurinella scofieldi
 * †Ceraurinella templetoni
 * †Ceraurinus
 * †Ceraurinus icarus
 * Ceraurus fossil cropped.png †[[Ceraurus]]
 * †Ceraurus pleurexanthemus
 * †Ceraurus pleurexanthomus
 * †Charactoceras
 * †Charactoceras laddi
 * †Chariocephalus
 * †Chariocephalus whitfieldi
 * †Chasmatopora
 * †Chasmatopora reticulata
 * †Cheilocephalus
 * †Cheilocephalus stcroixensis
 * †Cheirocrinus
 * †Chidleyenoceras
 * †Chirognathus
 * †Chirognathus duodactylus
 * †Cincinnaticrinus
 * †Cincinnaticrinus varibrachialus
 * Cincinnetina meeki (Miller, 1875) slab 3.jpg †[[Cincinnetina]]
 * †Cincinnetina minnesotensis – type locality for species
 * †Clathrospira
 * †Clathrospira conica
 * †Clathrospira subconica
 * †Cleiocrinus
 * †Cleionychia
 * †Coelocerodontus
 * †Coelocerodontus trigonius
 * †Colpodon
 * †Colpomya
 * Constellaria polystomella Liberty Formation.jpg †[[Constellaria]]
 * †Constellaria varia
 * †Conularia
 * †Cordylodus
 * †Cordylodus delicatus
 * †Cornites
 * †Coronocystis
 * †Coronocystis durandensis
 * †Cotteroceras
 * †Cotteroceras compressum
 * †Cotylahindia – type locality for genus
 * †Cotylahindia panaca – type locality for species
 * †Crania
 * †Crania reversa
 * †Craniops
 * †Craniops minor
 * †Cremacrinus
 * †Cremacrinus arctus
 * †Cremacrinus crossmani
 * †Cremacrinus gerki
 * †Cremacrinus guttenbergensis
 * †Cremacrinus punctatus
 * †Cryptophyllus
 * †Cryptophyllus obloides
 * †Cryptophyllus oboloides
 * †Cryptophyllus sulcatus
 * †Crytoniodus
 * †Crytoniodus complicatus
 * †Ctenobolbina
 * †Ctenobolbina emaciata
 * †Ctenobolbina maquoketensis
 * †Ctenodonta
 * †Ctenodonta novicea
 * †Ctenodonta oviformis – type locality for species
 * †Ctenodonta similis
 * †Ctenodonta subnasuta – type locality for species
 * †Culumbodina
 * †Culumbodina penna
 * †Cuneamya
 * †Cupulocrinus
 * †Cupulocrinus canaliculatus
 * †Cupulocrinus conjugans
 * †Cupulocrinus graciis – or unidentified related form
 * †Cupulocrinus gracilis
 * †Cupulocrinus humilis
 * †Cupulocrinus jewetti
 * †Cupulocrinus latibrachiatus – or unidentified related form
 * †Cupulocrinus levorsoni
 * †Cupulocrinus molanderi
 * †Cupulocrinus plattevillensis
 * †Curtognathus
 * †Cyclocystoides
 * †Cyclocystoides halli
 * †Cyclonema
 * †Cyclonema aiens
 * †Cyclonema percarinata
 * †Cyclonema textilis
 * †Cyclonema varicosum
 * †Cyclospira
 * †Cyclospira bisulcata
 * †Cymatonota
 * †Cyptendoceras
 * †Cyptendoceras ruedemanni
 * †Cyrtocerina
 * †Cyrtocerina crenulata
 * †Cyrtocerina schoolcrafti
 * †Cyrtodonta
 * †Cyrtodonta descriptus
 * †Cyrtodonta dignus
 * †Cyrtodonta grandis
 * †Cyrtodontula
 * †Cyrtodontula praecipita – type locality for species
 * †Cyrtoizoceras
 * †Cyrtoizoceras minneapolis
 * †Cyrtolites
 * †Cyrtolites dilatus
 * †Cyrtolites disjunctus
 * †Cyrtolites minor
 * †Cyrtolites ornatus
 * †Cyrtolites retrorsus
 * †Cyrtonellopsis
 * †Cyrtonellopsis vetulum
 * †Cyrtospira
 * †Cyrtospira wykoffensis
 * †Cyrtostropha
 * †Cyrtostropha salteri –

D

 * †Daidia
 * †Daidia subconica – type locality for species
 * †Dalmanella
 * †Dalmanella rara – or unidentified comparable form
 * †Dalmanella sculpta – tentative report
 * †Dapsilodus
 * †Dapsilodus mutatus
 * †Deceptrix
 * †Deckeroceras
 * †Deckeroceras clermontense
 * †Deiroceras
 * †Deiroceras scofieldi
 * †Dekayella
 * †Dekayella praenuntia
 * †Delotaxis
 * †Dendrocrinus
 * †Dendrocrinus acutidactylus – or unidentified related form
 * †Dendrocrinus casei
 * †Desmograptus
 * †Desmograptus cancellatus
 * †Diceromyonia
 * †Diceromyonia ignota
 * †Dicranella
 * †Dicranella bicornis
 * †Dicranella marginata
 * †Dicranella marinata
 * †Dicranella simplex
 * †Dicranella spinosa
 * †Dicranella typa
 * †Diestoceras
 * †Diestoceras alceum
 * †Diestoceras clarkei
 * †Dilobella
 * †Dilobella simplex
 * †Dilobella typa
 * †Dinorthis
 * †Dinorthis pectinella
 * †Diorthelasma
 * †Diorthelasma weissi – type locality for species
 * Diplograptus simplex.png †[[Diplograptus]]
 * †Diplograptus peosta
 * †Doleroides
 * †Doleroides pervetus
 * †Dolichoharpes
 * †Dolichoharpes ottawaensis
 * †Drepanoistodus
 * †Drepanoistodus suberectus
 * †Drumaspis
 * †Drumaspis sabulosa
 * †Drumaspis tanycodia
 * †Dvorakia
 * †Dvorakia chattertoni – type locality for species
 * †Dvorakia klapperi –

E

 * †Eccyliopterus
 * †Eccyliopterus owenanus
 * †Ectenaspis
 * †Ectenaspis beckeri – type locality for species
 * †Ectenocrinus
 * †Ectenocrinus raymondi
 * †Ectenocrinus simplex
 * †Ectomaria
 * †Ectomaria pagoda
 * †Ectomaria prisca
 * †Edrioaster
 * †Edrioaster bigsbyi
 * †Ellesmeria
 * †Ellesmeria scobeyi
 * †Ellesmeroceras
 * †Ellesmeroceras winonicum
 * †Ellipsocephaloides
 * †Ellipsocephaloides curtus
 * †Ellipsocephaloides gracilis
 * †Elliptocryprites
 * †Elliptocryprites paracylindrica – type locality for species
 * †Elliptocyprites
 * †Elliptocyprites paracylindrica – type locality for species
 * Endoceras.JPG †[[Endoceras]]
 * †Endoceras atkinsonense
 * †Endoceras clarkei
 * †Endoceras clermontense
 * †Endoceras decorahense
 * †Endoceras eburneolum – type locality for species
 * †Endoceras fulgar
 * †Endoceras gracillimum
 * †Endoceras kayi
 * †Endoceras proteiforme
 * †Endoceras thomasi
 * †Eobelodina
 * †Eobelodina hormacola
 * †Eochonetes
 * †Eochonetes recedens
 * †Eomonorachus
 * †Eomonorachus intermedius
 * †Eoplectodonta
 * †Eoplectodonta recedens
 * †Eoplectodonta saxea
 * †Eoschmidtella
 * †Eoschmidtella umbonata
 * †Eotomaria
 * †Eotomaria dryope
 * †Eotomaria vicina
 * †Ephippiorthoceras
 * †Ephippiorthoceras laddi
 * †Ephippiorthoceras tenuistriatum
 * †Eremotrema – tentative report
 * †Eremotrema emacerata
 * †Eridotrypa
 * †Eridotrypa aedilis
 * †Eridotrypa exigua
 * †Erismodus
 * †Erismodus quadridactylus
 * †Eroicaspira
 * †Eroicaspira bellicincta
 * †Erratencrinurus
 * †Erratencrinurus vigilans
 * †Escharopora
 * †Escharopora subrecta
 * †Eukloedenella
 * †Eukloedenella richmondensis
 * †Eumorphocystis
 * †Eunema
 * †Eunema centralis
 * †Eunema concinnula
 * †Eunema helicteres
 * †Eunema quadrisulcata
 * †Eunema simile
 * †Euomphalopsis
 * †Euomphalopsis depressa – type locality for species
 * †Euprimitia
 * †Euprimitia celata
 * †Euprimitia labiosa
 * †Euprimitia linepunctata
 * †Euprimitia sanctipauli
 * †Eurychilina
 * †Eurychilina cannonfallsensis – type locality for species
 * †Eurychilina depressa
 * †Eurychilina incurva
 * †Eurychilina kayi – type locality for species
 * †Eurychilina micropunctata – type locality for species
 * †Eurychilina minutifoveata
 * †Eurychilina partifimbriata
 * †Eurychilina reticulata
 * †Eurychilina subradiata
 * †Eurychilina sugarcreekensis – type locality for species
 * †Eurychilina ventrosa
 * †Eurycystites
 * †Eurycystites granosus
 * †Eurymya
 * †Eurymya plana
 * †Eurystomites
 * †Eurystomites kelloggi –

F

 * †Fayettoceras – tentative report
 * †Fayettoceras beloitense
 * †Fisherities
 * Flexicalymene tazarensis.2 - Ordovicico cropped.jpg †[[Flexicalymene]]
 * †Flexicalymene senaria
 * †Floripatella
 * †Floripatella humilis
 * †Furcitella
 * †Furcitella scofieldi
 * †Fusispira
 * †Fusispira angusta
 * †Fusispira convexa
 * †Fusispira inflata
 * †Fusispira intermedia
 * †Fusispira nobilis
 * †Fusispira planulata
 * †Fusispira spicula
 * †Fusispira subbrevis
 * †Fusispira subfusiformis
 * †Fusispira ventricosa
 * †Fusispira vittata –

G

 * [[File:Gabriceraurus dentatus, Middle Ordovician, Bobcaygeon Formation, Southern Ontario, Canada - Houston Museum of Natural Science - DSC01557.JPG|thumb|upright=0.75|Gabriceraurus dentatus]] †Gabriceraurus
 * †Gabriceraurus mifflinensis
 * †Geisonoceras
 * †Geisonoceras clermontense
 * †Geisonoceras scofieldi
 * †Globonema
 * †Globonema niota
 * †Glyptocrinus
 * †Glyptocrinus ornatus – or unidentified related form
 * †Glyptocrinus pustulosis
 * †Glyptocrinus tridactylus
 * †Glyptocystites
 * †Glyptocystitid – type locality for genus
 * †Glyptorthis
 * †Glyptorthis bellarugosa
 * †Glyptorthis insculpta
 * †Gonioceras
 * †Gonioceras anceps
 * †Gonioceras homerense
 * †Gonioceras kayi
 * †Gonioceras occidentale
 * †Goniophora
 * †Goniophora absimilis
 * †Gorbyoceras
 * †Graptodictya
 * †Graptodictya proava
 * †Graptodictya simplex
 * †Grenprisa
 * †Grenprisa billingsi
 * RugosaOrdovician.jpg †[[Grewingkia]]
 * †Gyronema
 * †Gyronema pulchellum
 * †Gyronema semicarinatum –

H

 * †Hallatia
 * †Hallatia convexa
 * †Hallatia duplicata
 * †Hallatia particylindrica
 * †Halliella
 * †Halliella magnipunctata
 * Hallopora multitabulata fossil bryozoan (Ordovician; Frankfort IL.jpg †[[Hallopora]]
 * †Hallopora dumalis
 * †Hallopora goodhuensis
 * †Hallopora multitabulata
 * †Hallopora undulata
 * †Hebertella
 * †Hebertella occidentalis
 * †Hebetoceras – tentative report
 * †Helcionopsis
 * †Helcionopsis depressum
 * †Helcionopsis wisconsinensis
 * †Helicotoma
 * †Helicotoma planulata
 * †Helopora
 * †Helopora divaricata
 * †Hemicystites
 * †Hemicystites curtus
 * †Hemicystites paulianus
 * †Hemiphragma
 * †Hemiphragma irrasum
 * †Hemiphragma tenuimurale
 * †Hesperidella
 * †Hesperidella initialis
 * †Hesperorthis
 * †Hesperorthis tricenaria
 * †Hindia
 * †Hindia sphaeroidalis
 * †Hiscobeccus
 * †Hiscobeccus capax
 * Holopeidae - Holopea praestans.JPG †[[Holopea]]
 * †Holopea ampla
 * †Holopea appressa
 * †Holopea concinnula
 * †Holopea excelsa
 * †Holopea insignis
 * †Holopea obliqua
 * †Holopea paludiniformis
 * †Holopea pyrene
 * †Holopea rotunda
 * †Holopea similis
 * †Holopea supraplana
 * †Holtedahilina
 * †Holtedahilina emaciata
 * †Homotrypa
 * †Homotrypa subramosa
 * †Homotrypella
 * †Homotrypella cribrosa
 * †Homotrypella hospitalis
 * †Homotrypella instabilis
 * †Horiostomella
 * †Hormotoma
 * †Hormotoma artemesia
 * †Hormotoma cassina
 * †Hormotoma gracilis
 * †Hormotoma minnesotensis
 * †Hormotoma multivolvis
 * †Hormotoma neglecta
 * †Hormotoma oehlerti
 * †Hormotoma subangulata
 * †Hudsonaster
 * †Hudsonaster narrawayi
 * †Hudsonaster rugosus – or unidentified related form
 * †Hybocrinus
 * †Hybocrinus conicus
 * †Hypseloconus – type locality for genus
 * †Hypseloconus cornutiformis – type locality for species
 * †Hypseloconus elongatus – type locality for species
 * †Hypsiptycha
 * †Hypsiptycha anticostiensis –

I

 * †Icriodella
 * †Icriodella superba
 * †Icriodus
 * †Icriodus calvini – type locality for species
 * †Icriodus orri – type locality for species
 * †Idahoia
 * †Idahoia serapia
 * †Idahoia serapio
 * †Idahoia wisconsensis
 * †Idiospira
 * †Idiospira panderi
 * †Illaenus
 * †Illaenus americanus
 * †Ischadites
 * †Ischadites iowensis
 * †Isorthoceras
 * †Isorthoceras junceum
 * †Isorthoceras sociale
 * Isotelus brachycephalus.JPG †[[Isotelus]]
 * †Isotelus gigas
 * †Isotelus iowensis
 * †Isotelus simplex
 * †Isotelus susae
 * †Isotomocrinus
 * †Isotomocrinus minutus –

K

 * †Kentlandoceras –
 * †Kentlandoceras husseyi
 * †Kentlandoceras schrocki – or unidentified comparable form
 * †Kiesowia – tentative report
 * †Kiesowia verrucosa
 * Kionoceras doricum.JPG †[[Kionoceras]]
 * †Kionoceras decorahense
 * †Kionoceras postvillense
 * †Kionoceras tenuitectum
 * †Kionoceras thomasi
 * †Kirengella
 * †Kirengella rectilateralis – type locality for species
 * †Kirengella stabilis – type locality for species
 * †Kokenospira
 * †Kokenospira costalis – type locality for species
 * †Krausella
 * †Krausella arcuata
 * †Krausella curtispina
 * †Krausella inaequalis
 * †Krausella variata –

L

 * †Laccoprimitia
 * †Laccoprimitia fillmorensis
 * †Laddella
 * †Laddella insueta
 * †Lambeoceras
 * †Lambeoceras confertum
 * †Lambeoceras cultratum – or unidentified comparable form
 * †Lecanospira
 * †Lecanospira transversocordatus – type locality for species
 * †Leperditella
 * †Leperditella fryei
 * †Leperditella macra
 * †Leperditella millepunctata
 * †Leperditella persimilis
 * †Lepidocyclus
 * †Lepidocyclus laddi
 * †Lesueurilla
 * †Lesueurilla beloitensis
 * †Lichenaria
 * †Lichenaria typa
 * Lingula anatina 7 .JPG †[[Lingula (genus)|Lingula]]
 * †Lingula morsei
 * †Lingula philomela
 * †Lingulasma
 * †Lingulasma galenensis
 * †Lingulops
 * †Liospira
 * †Liospira americana
 * †Liospira angustata
 * †Liospira decipens
 * †Liospira micula
 * †Liospira modesta
 * †Liospira obtusa
 * †Liospira progne
 * †Liospira vitruvia
 * †Loganoceras
 * †Lophospira
 * †Lophospira decursa
 * †Lophospira major
 * †Lophospira milleri
 * †Lophospira obliqua
 * †Lophospira perangulata – type locality for species
 * †Lophospira serrulata
 * †Lophospira spironema
 * †Lophospira ventricosa
 * †Loxobucania
 * †Loxobucania emmonsi
 * †Loxobucania lindsleyi
 * †Lyrodesma
 * †Lyrodesma cannonense – type locality for species
 * †Lytospira
 * †Lytospira subrotunda
 * †Lytospira undulatus –

M

 * †Maclurina
 * †Maclurina bigsbyi
 * †Maclurina manitobensis
 * †Maclurites
 * †Maclurites crassa
 * †Maclurites cuneata
 * †Maclurites depressus
 * †Maclurites nitidus
 * †Maclurites subrotunda
 * Macrocypris
 * †Macrocypris kayi
 * †Macrocyproides
 * †Macrocyproides clermontensis
 * †Macrocyprus
 * †Macrocyprus kayi
 * †Macronotella
 * †Macronotella arcta
 * †Macronotella scofeldi
 * †Macronotella scofieldi
 * †Manespira
 * †Manespira nicolleti
 * †Manitoulinoceras
 * †Manitoulinoceras neleum
 * †Manitoulinoceras warsawense
 * †Manitoulinoceras wykoffense
 * †Maratia
 * †Maratia mana
 * †Maratia mara
 * †Maratia micula
 * †Matheria
 * †Megamyonia
 * †Megamyonia unicostata
 * †Merocrinus
 * †Merocrinus britonensis
 * †Metaspyroceras
 * †Metaspyroceras clarkei
 * †Metaspyroceras minneapolis
 * †Metaspyroceras nicolleti
 * †Metaspyroceras perlineatum
 * †Metaspyroceras wisconsinense
 * †Michelinoceras
 * †Michelinoceras beltrami
 * †Michelinoceras multicameratum
 * †Microcoelodus
 * †Milleratia
 * †Milleratia cincinnatiensis
 * †Mitoclema
 * †Mitoclema mundulum
 * †Mixoconus
 * †Mixoconus primus
 * †Modiolodon
 * †Modiolopsis
 * †Modiolopsis fountainensis
 * †Modiolopsis gregalis
 * †Modiolopsis nana – type locality for species
 * †Monocheilus
 * †Monocheilus anatinum
 * †Monocheilus micros
 * †Monocyclic
 * †Monocyclic inadunate
 * †Monotrypa
 * †Multioistodus
 * †Myeinocystites
 * †Myeinocystites crossmani –

N

 * †Nanno
 * †Nanno aulema
 * †Nasutimena
 * †Nasutimena fluctuosa – or unidentified comparable form
 * †Nematopora
 * †Nematopora conferta
 * †Nematopora consueta
 * †Nematopora ovalis
 * †Neobothriocidaris
 * †Neobothriocidaris templetoni
 * †Neocoleodus
 * †Neopanderodus
 * †Ningulella
 * †Ningulella paucisulcata
 * †Nodambichilina
 * †Nodambichilina symmetrica
 * †Nuculites –

O

 * †Oepikina
 * †Oepikina inquassa
 * †Oepikina minnesotensis
 * †Oistodus
 * †Oistodus abundans
 * †Oistodus venustus
 * †Omospira
 * †Omospira laticincta
 * †Omospira trentonensis
 * †Oneotodus
 * †Oneotodus ovatus
 * †Onniella
 * †Onniella porrecta
 * †Onniella quadrata
 * †Onoceras
 * †Onoceras abruptum
 * †Onoceras douglassi
 * †Onoceras tetreauvillense
 * †Ophileta
 * †Ophiletina
 * †Ophiletina angularis
 * †Ophiletina fausta
 * †Ophiletina sublaxa
 * †Opikatia
 * †Opikatia emaciata
 * †Opikatia rotunda
 * †Orbiculoidea
 * †Orbiculoidea lamellosa – or unidentified comparable form
 * †Orbiculoidea pelopea
 * †Ormoceras – tentative report
 * †Ormoceras maquoketense
 * †Orthoceras
 * †Orthoceras beltrami
 * †Orthoceras minnesotense
 * †Orthodesma
 * †Orthodesma canaliculatum
 * †Orthodesma caniculatum
 * †Orthodesma litoralis
 * †Orthograptus
 * †Oulodus
 * †Oulodus serratus
 * †Oxoplecia
 * †Oxoplecia ulrichi
 * †Ozarkodina
 * †Ozarkodina concinna
 * †Ozarkodina delecta
 * †Ozarkodina raaschi –

P

 * †Pachydictya
 * †Pachydictya elegans
 * †Pachyglossella
 * †Pachyglossella elderi
 * †Pachyglossella riciniformis
 * †Palaeocrinus
 * †Palaeocrinus angulatus
 * †Palaeoglossa
 * †Palaeoglossa hurlburti
 * †Palaeoneilo
 * †Paleocrinus
 * †Paleocrinus angulatus
 * †Panderodus
 * †Panderodus feulneri
 * †Panderodus gracilis
 * †Panderodus panderi
 * †Parabolbina
 * †Parabolbina antecedans
 * †Parabolbina carinifera
 * †Parabolbina staufferi
 * †Paraliospira
 * †Paraliospira abrupta
 * †Paraliospira supracingulata
 * †Paraschmidtella
 * †Paraschmidtella irregularis
 * †Paraschmidtella uphami
 * †Parastrophina
 * †Parastrophina berensis
 * †Parastrophina bernensis
 * †Parastrophina rotundiformis
 * †Parenthatia
 * †Parenthatia camerata
 * †Parenthatia punctata
 * †Parschmidtella
 * †Parschmidtella uphami
 * †Paucicrura
 * †Paucicrura corpulenta
 * †Paucicrura rogata
 * †Paupospira
 * †Paupospira burginensis
 * †Paupospira elevata
 * †Paupospira oweni
 * †Paupospira sumnerensis
 * †Pedomphalella
 * †Pedomphalella intermedia
 * †Pedomphalella subovata
 * †Periglyptocrinus
 * †Periglyptocrinus spinuliferus
 * †Periodon
 * †Periodon grandis
 * †Petrocrania
 * †Petrocrania halli
 * †Petrocrania trentonensis
 * †Phialaspongia – type locality for genus
 * †Phialaspongia fossa – type locality for species
 * †Phragmodus
 * †Phragmodus cognitus
 * †Phragmodus inflexus
 * †Phragmodus undatus
 * †Phragmolites
 * †Phragmolites compressus
 * †Phragmolites dyeri
 * †Phragmolites fimbriata
 * †Phragmolites obliquus
 * †Phragmolites triangularis
 * †Phyllodictya
 * †Phyllodictya varia
 * †Pinodema
 * †Pinodema conradi
 * †Pionodema
 * †Pionodema circularis
 * †Pionodema subaequata
 * Plaesiomyiidae - Plesiomys subquadrata.JPG †[[Plaesiomys]]
 * †Plaesiomys meedsi
 * †Plaesiomys proavitus
 * †Plaesiomys subquadrata
 * †Platystrophia
 * †Platystrophia amoena
 * †Platystrophia biforata
 * †Platystrophia extensa – tentative report
 * †Platystrophia trentonensis
 * †Plectoceras
 * †Plectoceras occidentale
 * †Plectoceras robertsoni
 * †Plectodina
 * †Plectodina aculeata
 * †Plectodina tenuis
 * †Plectorthis
 * †Plectorthis plicatella
 * †Plethocardia
 * †Plethocardia suberecta
 * †Plethospira
 * †Plethospira cannonensis – type locality for species
 * †Plethospira cassina
 * Pleurocystites squamosus.jpg †[[Pleurocystites]]
 * †Pleurocystites squamosus
 * †Polygammoceras
 * †Polygammoceras prestonense
 * †Polygnathus
 * †Polygnathus curtigladius
 * †Polygnathus intermedius
 * †Polygnathus linguiformis
 * †Polygnathus parawebbi
 * †Polygrammoceras
 * †Polygrammoceras prestonense
 * †Polyplacognathus
 * †Polyplacognathus ramosus
 * †Porocrinus
 * †Porocrinus elegans
 * †Porocrinus fayettensis
 * †Porocrinus pentagonius
 * †Porocrinus smithi – or unidentified related form
 * †Praepleurocystis
 * †Prasopora
 * †Prasopora insularis
 * †Primitella
 * †Primitella constricta
 * †Primitella plattevillensis
 * †Primitia
 * †Primitia cannonensis – type locality for species
 * †Primitia gibbera
 * †Primitia mammata
 * †Primitia spinata
 * †Primitia tumidula
 * †Primitiella
 * †Primitiella bellevuensis
 * †Primitiella carlei
 * †Primitiella constricta
 * †Primitiella milleri
 * †Primitiella plattevillensis
 * †Primitiopsis – tentative report
 * †Primitiopsis bella
 * †Probillingsites
 * †Probillingsites milleri
 * †Probillingsites pronis
 * †Probillingsites welleri
 * †Prolobella
 * †Promopalaeaster
 * †Promopalaeaster wilsoni
 * †Proplina
 * †Proplina convexum – type locality for species
 * †Proplina cornutaformis – type locality for species
 * †Proplina corpulentum – type locality for species
 * †Proplina extensum – type locality for species
 * †Prosaukia
 * †Prosaukia ambigua
 * †Prosaukia misa
 * †Proteroconus
 * †Proteroconus capuloides – type locality for species
 * †Protopanderodus
 * †Protopanderodus liripipus
 * †Pseudagnostus
 * †Pseudagnostus josephus
 * †Pseudolingula
 * †Pseudolingula eva
 * †Pseudolingula iowensis
 * †Pseudoprimitella
 * †Pseudoprimitella unicornis
 * †Pseudulrichia
 * †Pseudulrichia simplex
 * †Psuedulrichia
 * †Psuedulrichia simplex
 * †Pterinea
 * †Pterotheca
 * †Pterotheca attenuata
 * †Pterygometopus
 * †Pterygometopus sclerops – or unidentified comparable form
 * †Ptiloconus
 * †Ptilodictya – tentative report
 * †Ptychaspis
 * †Ptychaspis granulosa
 * †Ptychaspis miniscaensis
 * †Ptychaspis striata
 * †Ptychaspis tuberosa
 * †Ptychocrinus
 * †Punctaparchites
 * †Punctaparchites rugosus
 * †Punctaparchites splendens
 * †Pycnocrinus
 * †Pycnocrinus gerki
 * †Pycnocrinus multibrachialis
 * †Pycnocrinus sardesoni
 * †Pyrgocystis
 * †Pyrgocystis sardesoni –

Q

 * †Quasibollia –
 * †Quasibollia persulcata
 * †Quasibollia ridicula
 * †Quienquecaudex
 * †Quienquecaudex springeri –

R

 * †Rafinesquina –
 * †Rafinesquina deltoidea
 * †Rafinesquina nitans
 * †Rafinesquina trentonensis
 * †Raphistoma
 * †Raphistoma shakopeense – type locality for species
 * †Raphistomina
 * †Raphistomina lapicida
 * †Raphistomina rugata
 * †Raymondatia
 * †Raymondatia goniglypta
 * †Redpathoceras – tentative report
 * †Reedsoceras
 * †Reedsoceras macrostomum
 * †Reteocrinus
 * †Reteocrinus rocktonensis
 * †Reteocrinus spinosus
 * †Rhaphanocrinus
 * †Rhaphanocrinus buckleyi
 * †Rhaphistomina
 * †Rhaphistomina rugata
 * †Rhinidictya
 * †Rhynchotrema
 * †Rhynchotrema ainsliei
 * †Rhynchotrema laticosta
 * †Rhynchotrema wisconsinense
 * †Rhytimya
 * †Richardsonoceras
 * †Richardsonoceras beloitense
 * †Richardsonoceras clarkei
 * †Richardsonoceras romingeri
 * †Richardsonoceras scofieldi
 * †Richardsonoceras simplex
 * †Rigidella
 * †Rigidella cannonensis – type locality for species
 * †Rioceras
 * †Rioceras consuetum – tentative report
 * †Rosticellula
 * †Rosticellula colei
 * Rostricellula
 * †Rostricellula minnesotensis –

S

 * †Saccelatia
 * †Saccelatia angularis
 * †Saccelatia arcuamuralis
 * †Saccelatia arrecta
 * †Saccelatia bullata
 * †Saccelatia cletifera
 * †Saffordia
 * †Salpingostoma
 * †Salpingostoma buelli
 * †Salpingostoma imbricata
 * †Salpingostoma sculptilis
 * †Saratogia
 * †Saratogia hamula
 * †Scaevogyra
 * †Scaevogyra swezeyi – type locality for species
 * †Scalenocystites
 * †Scalenocystites strimplei
 * †Scalites
 * †Scalites peracutum
 * Scenella.jpg †[[Scenella]]
 * †Scenella compressa
 * †Scenella obtusa
 * †Sceptaspis
 * †Sceptaspis lincolnensis
 * †Schizambon
 * †Schizocrania
 * †Schizocrania filosa
 * †Schmidtella
 * †Schmidtella affinis
 * †Schmidtella brevis
 * †Schmidtella lacunosa
 * †Schuchertia
 * †Schuchertoceras
 * †Schuchertoceras thomasi
 * †Scofieldia
 * †Scofieldia bilateralis
 * †Scofieldoceras
 * †Scofieldoceras depressum
 * †Scofieldoceras shumardi
 * †Scyphiodus
 * †Scyphiodus primus
 * †Similodonta
 * †Simulites
 * †Simulites concinnus
 * †Sinuites
 * †Sinuites cancellatus
 * †Sinuites pervoluta
 * †Sinuites rectangularis
 * †Sinuites subcompressa – type locality for species
 * †Sivertsia
 * †Skenidioides
 * †Skenidioides anthonense
 * †Sowerbyella
 * †Sowerbyella curdsvillensis
 * †Sowerbyella minnesotensis
 * †Spatiopora
 * †Spatiopora lineata
 * †Sphenolium
 * †Sphenosphaera
 * †Sphenosphaera platystoma
 * †Sphenosphaera rogersensis
 * †Spyroceras
 * †Spyroceras cylindratum
 * †Spyroceras lesueuri
 * †Spyroceras perroti – or unidentified comparable form
 * †Spyroceras scofieldi
 * †Staufferella
 * †Staufferella falcata
 * †Staufferoceras
 * †Staufferoceras featherstonhaughi
 * †Stereoconus
 * †Stereoconus gracilis
 * †Stictopora
 * †Stictopora dumosa
 * †Stictopora exigua
 * †Stictopora lita
 * †Stictopora minima
 * †Stictopora mutabilis
 * †Stictopora neglecta – or unidentified comparable form
 * †Stictopora paupera
 * †Stictoporella
 * †Stictoporella angularis
 * †Stictoporella cribrosa
 * †Stictoporella frondifera
 * †Stictoporella gracilis
 * †Stigmacephalus
 * †Stigmacephalus flexifrons
 * †Stigmaspis
 * †Stigmaspis hudsonensis
 * †Stigmatella
 * †Stigmatella claviformis
 * †Strepsodiscus
 * †Strepsodiscus franconiensis – type locality for species
 * †Strepsodiscus strongi
 * †Streptelasma
 * †Streptelasma corniculum
 * Strophomena costellata brachial.jpg †[[Strophomena]]
 * †Strophomena billingsi
 * †Strophomena filitexta
 * †Strophomena incurvata
 * †Strophomena occidentalis
 * †Strophomena planodorsata
 * †Strophomena plattinensis – or unidentified comparable form
 * †Strophomena septata
 * †Strophomena trilobata
 * †Strophomena trilobita
 * †Stylocyrtoceras
 * †Stylocyrtoceras tantillum – type locality for species
 * †Subulites
 * †Subulites conradi
 * †Subulites dixonenesis
 * †Subulites elongatus
 * †Subulites pergracilis
 * †Subulites regularis
 * †Sygcaulocrinus
 * †Sygcaulocrinus typus –

T

 * †Tanaocystis
 * †Tancrediopsis
 * †Technophorus
 * †Technophorus divaricatus
 * †Teichertoceras
 * †Teichertoceras husseyi – or unidentified comparable form
 * †Tetradella
 * †Tetradella ellipsilira
 * †Tetradella subquadrans
 * †Tetradella ulrichi
 * †Tetranota
 * †Tetranota bidorsata
 * †Tetranota macra
 * †Tetranota obsoleta
 * †Tetranota sexcarinata
 * †Tetranota wisconsinensis
 * †Tetraprioniodus
 * †Tetraprioniodus breviconus
 * †Thaleops
 * †Thaleops ovata
 * †Thomasatia
 * †Thomasatia falcicosta
 * †Thuroholia
 * †Thuroholia cribriformis
 * †Thuroholia croneisi
 * †Traskocrinus
 * †Traskocrinus mahlburgi
 * †Trematis
 * †Trematis huronensis
 * †Trematopora
 * †Trematopora primigenia
 * †Trichinocrinus – or unidentified related form
 * †Triconodella
 * †Triconodella flexa
 * †Trigrammaria
 * †Trigrammaria winchelli
 * †Tripteroceras
 * †Tripteroceras oweni
 * †Tripteroceras planoconvexum
 * †Tripteroceras scofieldi
 * †Trochonema
 * †Trochonema altum
 * †Trochonema beachi
 * †Trochonema beloitense
 * †Trochonema fragile
 * †Trochonema retrorsum
 * †Trochonema rugosa
 * †Trochonema subcrassum
 * †Trochonema umbilicata
 * †Trochonema vagrans
 * Tryblidium reticulatum 3.jpg. Head region is to the left.]] †Tryblidium''
 * †Tryblidium exserta –

U

 * †Ulrichaster –
 * †Ulrichaster ulrichi
 * †Ulrichia
 * †Ulrichia saccula
 * †Ulrichoceras
 * †Ulrichoceras beloitense
 * Urasterella asperula.jpg †[[Urasterella]]
 * †Valcouroceras
 * †Vanuxemia
 * †Vanuxemia dixonensis
 * †Vellamo
 * †Vellamo americana –

W

 * †Westonoceras
 * †Westonoceras iowense
 * †Westonoceras minnesotense
 * †Whiteavesia
 * †Whiteavesites
 * †Whitfieldoceras
 * †Whitfieldoceras clarkei
 * †Whitfieldoceras exiguum – or unidentified comparable form
 * †Whitfieldoceras minimum
 * †Whitfieldoceras mumiaforme
 * †Wilbernia
 * †Wilbernia pero
 * †Willmanocystis
 * †Willmanocystis denticulatus
 * †Winchellatia
 * †Winchellatia ceratopea – type locality for species
 * †Winchellatia lansingensis
 * †Winchellatia longispina
 * †Winchellatia minnesotensis
 * †Winchellatia minnsotensis –

Z

 * †Zittelloceras
 * †Zittelloceras beloitense
 * †Zittelloceras brevicurvatum
 * †Zittelloceras clarkeanum
 * †Zittelloceras percurvatum
 * †Zittelloceras scofieldi
 * †Zittelloceras tenuistriatum
 * †Zygobolboides
 * †Zygobolboides calvini
 * †Zygobolboides grafensis
 * †Zygobolboides iowensis
 * †Zygobolboides thomasi
 * †Zygospira
 * †Zygospira lebanonensis
 * †Zygospira modesta
 * †Zygospira plinthii – type locality for species
 * †Zygospira uphami