# List of the prehistoric life of Iowa

This list of the prehistoric life of Iowa contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Iowa.

## Precambrian

The Paleobiology Database records no known occurrences of Precambrian fossils in Alabama.

## Paleozoic
### Selected Paleozoic taxa of Iowa

* †Acidaspis
* Fossilized calyx and partial stem of the Devonian-Permian crinoid ("sea lily") Actinocrinites †Actinocrinites
** †Actinocrinites gibsoni
** †Actinocrinites lowei
* †Agassizodus
** †Agassizodus variabilis
* †Aglaocrinus
* †Amplexus
* †Anataphrus
* †Anomphalus
* †Archaeogastropod
* †Arctinurus
* †Athyris
** †Athyris fultonensis – or unidentified comparable form
* Fossilized shell of the Silurian-Late Devonian brachiopod Atrypa reticularis †Atrypa
** †Atrypa reticularis
** †Atrypa reticularus
* †Aviculopecten
* †Bellerophon
* †Bembexia
* †Bothriocidaris
* †Bumastus
* †Calymene
* †Camarotoechia
** †Camarotoechia chouteauensis
** †Camarotoechia tuta
* †Cardiola
* †Catenipora
* †Ceratocephala
* †Ceratopsis
* †Ceraurus
* †Charactoceras
* Fossil of the Cambrian-Middle Devonian trilobite Cheirurus †Cheirurus
* †Chomatodus
** †Chomatodus inconstans
* †Chonetes
** †Chonetes glenparkensis
** †Chonetes illinoisensis
** †Chonetes logani
** †Chonetes multicosta
** †Chonetes ornatus
* †Cleiothyridina
** †Cleiothyridina incrassata – or unidentified comparable form
** †Cleiothyridina sublamellosa
* †Climacograptus
* †Coenites
* Fossilized shell of the Late Devonian-Permian brachiopod Composita †Composita
** †Composita humilis – tentative report
** †Composita trinuclea
* †Conocardium
* †Coolinia
* †Cornulites
* †Crania
* †Crotalocrinites
* †Curtognathus
* †Cyathocrinites
* †Cyclonema
* †Cyphaspis
* †Cypricardinia
* †Cyrtolites
* Fossilized shells of the Middle-Late Devonian brachiopod Cyrtospirifer †Cyrtospirifer
** †Cyrtospirifer whitneyi
* †Cystodictya
* †Dalmanites
* †Decadocrinus
* †Deiphon
* †Deltaherpeton – type locality for genus
* †Dentalium
* †Dicoelosia
* †Dimerocrinites
* †Diplograptus
** †Diplograptus modestus – or unidentified comparable form
* †Discosorus
* †Earlandia
* Life restoration of the Late Devonian-Carboniferous Chimaera relative Edestus †Edestus
* †Edmondia
* †Eldredgeops
** †Eldredgeops rana
* †Ellesmeroceras
* †Encrinurus
* †Endoceras
* Eocaudina
* †Eodictyonella
* †Eophacops
* †Eospirifer
** †Eospirifer radiatus
* †Eucalyptocrinites
* †Euomphalus
* †Favosites
* †Fenestella
* Front (left) and right side (right) views of an enrolled fossil of the Middle Ordovician-Silurian trilobite Flexicalymene †Flexicalymene
* †Goniatites
* †Gravicalymene
* †Greenops
* †Grewingkia
* †Gyroceras
* †Hallopora
* †Halysites
* †Harpidium
* †Heliophyllum
* †Hexagonaria
* †Hindia
* †Holopea
* †Huronia
* †Hyolithes
* †Icriodus
* †Idiognathodus
* Life restoration of the Carboniferous Chimaera relative Iniopteryx †Iniopteryx
** †Iniopteryx rushlaui
* †Iocrinus
* †Isotelus
* †Kayoceras
* †Kionoceras
* †Krausella
* †Leptopora
* †Lingula
* †Manticoceras
* †Marsupiocrinus
* Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella †Meristella
* †Meristina
* †Michelia
* †Michelinoceras
* †Murchisonia
* †Mycterops
* †Mystrocephala
* †Naticopsis
** †Naticopsis depressa – type locality for species
* †Neospirifer
* Nucula
* †Odontopleura
* Life restoration of the Middle-Late Devonian lobe-finned fish Onychodus †Onychodus
* †Orthoceras
* †Oulodus
* †Ozarkodina
* †Pachyphyllum
* †Paladin
* †Palmatolepis
* †Peachocaris
* †Pentamerus
* †Pentremites
* †Periechocrinus
* Fossilized tooth of the Carboniferous-Permian shark Petalodus †Petalodus
* †Phacops
* †Phillipsia
* †Pinnocaris
* †Plaesiomys
* †Platyceras
* †Platycrinites
* †Platystrophia
* †Plectodonta
* †Pleurocystites
* Pleurotomaria – tentative report
* †Plicochonetes
* †Poleumita
* †Polygnathus
** †Polygnathus parawebbi
** †Polygnathus xylus
* †Posidonia
* †Proetus
* Life restoration of the Late Devonian placoderm fish Ptyctodus †Ptyctodus
* †Rhynchodus
* †Rigidella
* †Scutellum
* †Scytalocrinus
* †Septemchiton
* †Sigournea – type locality for genus
** †Sigournea multidentata – type locality for species
* †Similodonta
* †Skenidioides – tentative report
* †Sowerbyella
* †Sphenothallus
* †Spirifer
** †Spirifer louisianensis
* †Spiriferina
* Spirorbis
* †Spyroceras
* Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus †Stethacanthus
* †Streptognathodus
* †Strophomena
** †Strophomena costata
** †Strophomena erratica
* †Stylonema – tentative report
* †Syringopora
* †Taxocrinus
* †Tranodis
* †Whatcheeria – type locality for genus
* †Worthenia
* †Youngia

## Mesozoic

* †Arcellites
** †Arcellites crillensis – type locality for species
** †Arcellites disciformis
* †Balmeisporites
** †Balmeisporites auriculata – type locality for species
* †Chrysotheca
** †Chrysotheca dakotaensis – type locality for species
** †Chrysotheca diskoensis
** †Chrysotheca levis
* Coptothyris
** †Coptothyris dakotaensis – type locality for species
* †Dunveganoceras
** †Dunveganoceras pondi
* Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size †Inoceramus
** †Inoceramus ginterensis
** †Inoceramus perfragilis
** †Inoceramus prefragilis
* †Metengonoceras
** †Metengonoceras acutum
* †Microcarpolithes
** †Microcarpolithes hexangulata
* †Minerisporites
** †Minerisporites mirabilis
* †Molaspora – type locality for genus
** †Molaspora lobata
** †Molaspora rugosa – type locality for species
* †Perotrilites
** †Perotrilites bursatus – type locality for species
** †Perotrilites convolutus – type locality for species
* †Pilularia
** †Pilularia globulifera
* †Regnellidium
** †Regnellidium diphyllum
* †Spermatites
** †Spermatites ellipticus
** †Spermatites elongatus

## Cenozoic

* Blarina
* Life restoration of the Pliocene-Holocene camel Camelops †Camelops
* Canis
** †Canis latrans
** †Canis lupus
* Castor
** †Castor canadensis
* †Castoroides
** †Castoroides ohioensis
* Didelphis
* Equus
* †Euceratherium – tentative report
** †Euceratherium collinum
* Geomys
* Lepus
* Lontra
** †Lontra canadensis
* †Mammut
** †Mammut americanum
* †Mammuthus
** Life restorations of a Mammut americanum, or American mastodon (right), and a Mammuthus primigenius, or wooly mammoth (left) †Mammuthus primigenius
* †Megalonyx
** †Megalonyx jeffersonii
* Microtus
** †Microtus paroperarius
* Mictomys
** †Mictomys meltoni
* Odocoileus
* Ondatra
* Panthera
* †Paramylodon
** †Paramylodon harlani
* †Platygonus
* Procyon
* Rangifer
* Sciurus
* Sorex
** †Sorex dispar – or unidentified comparable form
* Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon †Stegomastodon
** †Stegomastodon aftoniae – type locality for species
* Sylvilagus
* Taxidea
** †Taxidea taxus
* Ursus
** †Ursus americanus
* Vulpes