List of the prehistoric life of Delaware

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

Precambrian-Paleozoic

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

Mesozoic

Selected Mesozoic taxa of Delaware

†Acteon
†Aenona
– tentative report
†Agerostrea
†Ampullina
†Anaklinoceras
†Anomia
†Anomoeodus
Fossilized skeleton of the Late Cretaceous bony fish Apsopelix
†Apsopelix
- †Apsopelix anglicus
†Arca
Architectonica – or unidentified comparable form
Arrhoges
Astarte – tentative report
†Avellana
†Baculites
- †Baculites haresi
- †Baculites ovatus
Barbatia
Fossilized guard of the Late Cretaceous belemnoid cephalopod Belemnitella
†Belemnitella
- †Belemnitella americana
Bernaya
†Bonnerichthys
†Bulla
Cadulus
Caestocorbula
- †Caestocorbula crassiplica
†Calliomphalus
- †Calliomphalus americanus
  – tentative report
- †Calliomphalus nudus
Capulus
†Caveola
Cerithium
Clavagella
Life restoration of the Late Cretaceous mosasaurid Clidastes
†Clidastes – or unidentified comparable form
Cliona
†Coelosaurus
- †Coelosaurus antiquus
Corbula
†Crenella
- †Crenella serica
†Cretolamna
- †Cretolamna appendiculata
Cucullaea
Cuspidaria
- †Cuspidaria grandis
Cylichna
†Cymella
†Dentalium
†Didymoceras
- †Didymoceras binodosum
- †Didymoceras cheyennense
- †Didymoceras platycostatum
- †Didymoceras stevensoni
Life restoration of the Late Cretaceous primitive tyrannosaur Dryptosaurus
†Dryptosaurus
†Ecphora – tentative report
Emarginula
†Enchodus
†Euspira
†Eutrephoceras
†Exiteloceras
†Exogyra
- †Exogyra cancellata
- †Exogyra costata
- †Exogyra ponderosa
Gastrochaena
†Gegania
Ginglymostoma
Illustration of a reconstructed skull of the Late Cretaceous mosasaur Globidens
†Globidens
- †Globidens alabamensis
Glossus
Glycymeris
†Halisaurus
- †Halisaurus platyspondylus
†Hamulus
Haustator
– or unidentified comparable form
†Hoploscaphites
†Hybodus
†Inoceramus
†Ischyodus
- †Ischyodus bifurcatus
†Ischyrhiza
- †Ischyrhiza avonicola
  – or unidentified comparable form
- †Ischyrhiza mira
Fossilized shell of the Late Cretaceous ammonoid cephalopod Jeletzkytes
†Jeletzkytes
Lepisosteus – or unidentified comparable form
Lima
†Linearis
†Lingula
– tentative report
†Lissodus
Lithophaga
Lopha
- †Lopha falcata
†Lucina
Martesia
†Mathilda
†Menuites
†Morea – or unidentified comparable form
†Neithea
- †Neithea quinquecostata
Nucula
- †Nucula percrassa
A living Odontaspis sand shark
Odontaspis
†Ornithomimus
Ostrea
†Pachydiscus
†Pachymelania
Panopea
†Paralbula
† Paranomia
Patella
†Pecten
Pholadomya
- †Pholadomya occidentalis
Pholas – tentative report
†Pinna
†Placenticeras
Plicatula
†Pseudocorax
Life restoration of the Late Cretaceous pterosaur Pteranodon
†Pteranodon – tentative report
†Pteria
†Pterotrigonia
- †Pterotrigonia eufaulensis
†Ptychotrygon
Pycnodonte
- †Pycnodonte mutabilis
Rhinobatos
†Rhombodus
Ringicula
†Sargana
†Scapanorhynchus
- †Scapanorhynchus texanus
†Scaphites
- †Scaphites hippocrepis
†Sclerorhynchus
Serpula
Spondylus
Life restoration of the Late Cretaceous shark Squalicorax
Squalicorax
- †Squalicorax falcatus
- †Squalicorax kaupi
- †Squalicorax pristodontus
Squatina
†Stephanodus
Tellina
†Tenea
†Toxochelys
Trachycardium
- †Trachycardium eufaulensis
†Trigonia
Trionyx
Turritella
- †Turritella tippana
- †Turritella trilira
- †Turritella vertebroides
Restoration of the Late Cretaceous mosasaur Tylosaurus
†Tylosaurus
Tympanotonos – or unidentified comparable form
Xenophora
†Xiphactinus