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
  • Reconstructive diagram (left) of a fossil (right) of the Ordovician sea urchin Bothriocidaris. The short spines which were attached to the tubercles are not drawn.
    †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
  • Life restoration of the Early Ordovician-Silurian trilobite Bumastus
    †Bumastus
  • †Byrsolopsina
    • †Byrsolopsina centipunctata
    • †Byrsolopsina normella
    • †Byrsolopsina ovata
    • †Byrsolopsina planilateralis
  • Bythocypris
    • †Bythocypris curta
    • †Bythocypris furnishi
  • †Bythopora
    • †Bythopora subgracilis –

C

  • †Calceocrinus
    • †Calceocrinus gossmani
    • †Calceocrinus levorsoni
  • Fossil of the Early Ordovician-Early Devonian trilobite Calymene
    †Calymene
    • †Calymene mamillate
    • †Calymene winchelli
  • †Camaraspis
    • †Camaraspis convexus
  • †Camaraspoides
    • †Camaraspoides berkeyi
  • †Camellaspongia – type locality for genus
    • †Camellaspongia tumula – type locality for species
  • Restoration of the Middle Ordovician-Silurian nautiloid cephalopod Cameroceras feeding on an Aphetoceras, while a quartet of Cyclostomiceras swim by
    †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
  • Fossil of the Middle-Late Ordovician trilobite Ceraurus
    †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
  • Assemblage of fossilized shells of the Ordovician brachiopod Cincinnetina
    †Cincinnetina
  • †Clathrospira
    • †Clathrospira conica
    • †Clathrospira subconica
  • †Cleiocrinus
  • †Cleionychia
  • †Coelocerodontus
    • †Coelocerodontus trigonius
  • †Colpodon
  • †Colpomya
  • Fossil of the Ordovician bryozoan Constellaria
    †Constellaria
    • †Constellaria varia
  • †Conularia
  • †Cordylodus
    • †Cordylodus delicatus
  • †Cornites
  • †Coronocystis
    • †Coronocystis durandensis
  • †Cotteroceras
  • †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
  • Cambrian graptolite Diplograptus
    †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
  • Fossilized shells and restored appearances of the Middle-Late Ordovician nautiloid cephalopod Endoceras
    †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
  • Fossil of the Middle Ordovician-Silurian trilobite Flexicalymene
    †Flexicalymene
  • †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

  • 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
  • Multiple views of a fossil of the Ordovician horn coral Grewingkia
    †Grewingkia
  • †Gyronema
    • †Gyronema pulchellum
    • †Gyronema semicarinatum –

H

  • †Hallatia
    • †Hallatia convexa
    • †Hallatia duplicata
    • †Hallatia particylindrica
  • †Halliella
    • †Halliella magnipunctata
  • Fossil of the Ordovician bryozoan ("moss animal") Hallopora
    †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
  • Fossilized shells of the Ordovician-Carboniferous sea snail Holopea
    †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
  • Fossil of the Middle-Late Ordovician giant trilobite Isotelus.
    †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
  • Fossilized shells of the Middle Ordovician-Permian nautiloid cephalopod Kionoceras
    †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
  • Shell of the Cambrian-modern brachiopod Lingula
    †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
  • Fossilized shell of the Ordovician brachiopod Plaesiomys
    †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
  • Fossil of the Late Ordovician cystoid echinoderm Pleurocystites
    †Pleurocystites
    • †Pleurocystites squamosus
  • †Polygammoceras
    • †Polygammoceras prestonense
  • †Polygnathus
  • †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
  • †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
  • Fossils of the Cambrian mollusc Scenella
    †Scenella
  • †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
  • Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
    †Strophomena
  • †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
  • Illustration of a fossilized shell in multiple views of the Silurian monoplacophoran mollusc Tryblidium reticulatum. Head region is to the left.
    †Tryblidium
    • †Tryblidium exserta –

U

  • †Ulrichaster –
    • †Ulrichaster ulrichi
  • †Ulrichia
    • †Ulrichia saccula
  • †Ulrichoceras
    • †Ulrichoceras beloitense
  • Fossil of the Ordovician-Devonian sea star Urasterella
    †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

References

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