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
†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
†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
†Hypsognathus fenneri
†Isocampe
†Isocampe strata
†Loperia
†Mormolucoides
†Mormolucoides articulatus
†Ornithoidichnites
†Ornithoidichnites gracillior – type locality for species
†Ornithoidichnites sillimani – type locality for species
†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
†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.