This list of the prehistoric life of Wisconsin contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Wisconsin.
Precambrian
The Paleobiology Database records no known occurrences of Precambrian fossils in Wisconsin.
Paleozoic
Selected Paleozoic taxa of Wisconsin
†Acernaspis
†Acidaspis
†Actinoceras
†Aglaspis
†Agraulos
†Amplexopora
†Amplexus
†Arctinurus
†Athyris
†Atrypa
†Atrypa reticularis – tentative report
†Bumastus
†Bumastus armatus
†Bumastus cuniculus
†Bumastus dayi
†Bumastus ioxus
†Bumastus niagarensis
†Bumastus tenuis
†Calymene
†Calymene celebra
†Catenipora
†Cedaria
†Ceratocephala
†Ceraurus
†Cheirurus
†Chippewaella – type locality for genus
†Chondrites
†Chonetes
†Conchidium
†Conocoryphe
†Coolina
†Coolinia
†Coosia
†Corbina
†Cornulites
†Crepicephalus
†Crotalocrinites
†Cyathocrinites – tentative report
†Cycloceras
†Cypricardinia
†Dalmanites
†Deiphon
†Dendrograptus
†Dicoelosia
†Dikelocephalus
†Dimerocrinites
†Dimerocrinites occidentalis
†Distomodus
†Distyrax
†Dresbachia
†Echinochiton – type locality for genus
†Echinochiton dufoei – type locality for species
†Ellesmeroceras
†Ellipsocephalus
†Elrodoceras
†Encrinurus
†Entomaspis
†Eophacops
†Eophacops handwerki
†Eospirifer
†Eospirifer radiatus
†Eucalyptocrinites
†Eucalyptocrinites crassus
†Favosites
†Geisonocerina
†Hadromeros
†Halysites
†Harpidium
†Hexameroceras
†Holopea
†Howella
†Hyolithes
†Hypseloconus
†Illaenus
†Inversoceras
†Irvingella
†Isotelus
†Kionoceras
†Krausella
†Leonaspis
†Leurocycloceras
†Lingula
†Lingulella
†Lonchocephalus
†Mackenziurus
†Marsupiocrinus
†Maryvillia
†Matthevia
†Meristina
†Michelinoceras
†Milaculum
†Monograptus
†Murchisonia
†Norwoodia
†Obolus
†Ophioceras
†Ozarkodina
†Pelagiella
†Pemphigaspis
†Pentamerus
†Pentlandia
†Periechocrinus
†Phragmolites
†Plaesiomys
†Plagiostomoceras
†Planolites
†Platyceras
†Platystrophia
†Plectodonta
†Pleurodictyum
Pleurotomaria
†Polygrammoceras
†Proetus
†Sactorthoceras
†Saukiella
†Scutellum
†Similodonta
†Skenidioides
†Skolithos
†Sowerbyella
†Sphaerexochus
†Strophomena
†Strophomena costata
†Strophomena plattinensis
†Subulites
†Thalassinoides
†Thylacares – type locality for genus
†Thylacares brandonensis – type locality for species
†Uranoceras
†Westonia
†Whitfieldia
†Wurmiella
†Wurmiella excavata
Mesozoic
The Paleobiology Database records no known occurrences of Mesozoic fossils in Wisconsin.