List of the prehistoric life of Connecticut

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

Precambrian-Paleozoic
The Paleobiology Database records no known occurrences of Precambrian or Paleozoic fossils in Connecticut.

Mesozoic

 * †Acanthichnus
 * †Acanthichnus cursorius
 * †Anchisauripus
 * †Anchisauripus exsertus
 * †Anchisauripus giganteus – type locality for species
 * †Anchisauripus hitchcocki
 * †Anchisauripus parallelus
 * †Anchisauripus sillimani
 * †Anchisauripus tuberosus
 * Anchisaurus NT.jpg †[[Anchisaurus]]
 * †Anchisaurus polyzelus – type locality for species
 * †Ancyropus – type locality for genus
 * †Ancyropus heteroclitus – type locality for species
 * †Anomoepus
 * †Anomoepus curvatus
 * †Anomoepus gracillimus
 * †Anomoepus intermedius
 * †Argoides
 * †Argoides macrodactylus – type locality for species
 * †Argoides minimus – type locality for species
 * †Baiera
 * †Batrachopus
 * †Batrachopus barrattii
 * †Batrachopus deweyi
 * †Batrachopus dispar
 * †Batrachopus gracilis
 * †Belodon
 * †Belodon validus – type locality for species
 * †Bisulcus
 * Botryopera
 * †Brontozoum
 * †Brontozoum divaricatum
 * †Brontozoum giganteum
 * †Brontozoum isodactylum
 * †Brontozoum sillimanium
 * †Cochlichnus
 * †Coelophysis
 * †Conopsoides
 * †Conopsoides larvalis
 * †Corvipes
 * †Corvipes lacertoideus
 * †Cunichoides
 * †Cunichoides marsupialoideus – type locality for species
 * †Cunicularius
 * †Cunicularius retrahens
 * †Erpetosuchus
 * Dinosaur State Park (Rocky Hill, CT) - close-up.JPG †[[Eubrontes]]
 * †Eubrontes approximatus
 * †Eubrontes dananus – type locality for species
 * †Eubrontes divaricatus
 * †Eubrontes giganteus
 * †Gigandipus
 * †Gigandipus caudatus
 * †Grallator
 * †Grallator cuneatus
 * †Grallator cursorius
 * †Grallator formosus
 * †Grallator magnificus
 * †Grallator tenuis
 * †Harpedactylus
 * †Harpedactylus tenuissimus – type locality for species
 * †Herpystezoum
 * †Herpystezoum minutus
 * †Holcoptera
 * †Holcoptera giebeli
 * †Hoplichnus
 * †Hoplichnus equus
 * Hypsognathus NT small.jpg †[[Hypsognathus]]
 * †Hypsognathus fenneri
 * †Isocampe
 * †Isocampe strata
 * †Loperia
 * †Mormolucoides
 * †Mormolucoides articulatus
 * †Ornithoidichnites
 * †Ornithoidichnites gracillior – type locality for species
 * †Ornithoidichnites sillimani – type locality for species
 * Otozoum tracks cropped.jpg of the Late Triassic-Middle Jurassic sauropodomorph dinosaur footprint ichnogenus Otozoum]] †Otozoum
 * †Otozoum moodii
 * †Palamopus
 * †Palamopus divaricans
 * †Platypterna
 * †Platypterna deanii – type locality for species
 * †Platypterna delicatula – type locality for species
 * †Platypterna tenuis – type locality for species
 * †Plectropterna
 * †Plectropterna gracilis
 * †Plectropterna lineans
 * †Plectropterna minitans
 * †Plectropus
 * †Plectropus longipes
 * †Plesiornis
 * †Redfieldius
 * †Redfieldius gracilis
 * Semionotus bergeri.jpg †[[Semionotus]]
 * †Semionotus agassizi
 * †Semionotus tenuiceps
 * †Sillimanius
 * †Sillimanius gracilior – type locality for species
 * †Sillimanius tetradactylus – type locality for species
 * †Stegomus – type locality for genus
 * †Stegomus arcuatus – type locality for species
 * †Steropoides
 * †Steropoides divaricatus
 * †Steropoides diversus
 * †Steropoides infelix
 * †Steropoides loripes
 * †Tarsoplectrus
 * †Tarsoplectrus elegans – type locality for species
 * †Triaenopus
 * †Triaenopus baileyanus – type locality for species
 * †Triaenopus lulli – type locality for species
 * †Trihamus
 * †Trihamus elegans
 * †Trihamus magnus
 * †Typopus
 * †Typopus gracilis – type locality for species

Cenozoic
The Paleobiology Database records no known occurrences of Cenozoic fossils in Connecticut.