# 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

## Cenozoic
### Selected Cenozoic taxa of Delaware

* Life restoration of the Miocene-Pliocene beardog Amphicyon †Amphicyon
* Anadara
** †Anadara ovalis
* †Anchitheriomys
* †Anchitherium
* Anomia
** †Anomia simplex
* †Archaeohippus
* Argopecten
** †Argopecten irradians
* Shell of a modern Astarte bivalve Astarte
* Astyris
* Barnea
* Busycon
** †Busycon perversum
* Busycotypus
** †Busycotypus canaliculatus
* Cadulus
* Caecum
* Calliostoma
* Calyptraea
** †Calyptraea centralis
* Cancellaria
* Carcharhinus
** †Carcharhinus brachyurus
** †Carcharhinus limbatus
** †Carcharhinus perezii
* Carcharodon
** Fossilized tooth of the Miocene-Pliocene shark Cosmopolitodus hastalis, or broad-toothed mako †Carcharodon hastalis
* Carditamera
* Cerastoderma – report made of unidentified related form or using admittedly obsolete nomenclature
* †Chesapecten
* †Chrysodomus
* Clementia
* Corbula
* Crassostrea
** †Crassostrea virginica
* Crepidula
** †Crepidula fornicata
** †Crepidula plana
* Crocodylus
* Crucibulum
* Cyclocardia
* Cymatosyrinx
* Cymia
* Fossilized cranium of the Miocene bear-dog Cynelos †Cynelos
* Diastoma
* Dinocardium
* Diodora
* Donax
* Dosinia
* †Ecphora
* Ensis
** †Ensis directus
* Epitonium
* Euspira
** †Euspira heros
* Ficus
* A living Galeocerdo cuvier, or tiger shark Galeocerdo
** †Galeocerdo aduncus
** †Galeocerdo contortus
* Gavia
* Gemma
** †Gemma gemma
* Geochelone
* Geukensia
** †Geukensia demissa
* Glossus
* Glycymeris
* Hemipristis
** Fossilized teeth of the Miocene weasel shark Hemipristis serra †Hemipristis serra
* Ilyanassa
** †Ilyanassa obsoleta
** †Ilyanassa trivittata
* †Inodrillia
** †Inodrillia whitfieldi
* Iphigenia
* Isognomon
* Isurus
** †Isurus oxyrinchus
* Kinosternon
* †Leptophoca
** †Leptophoca lenis
* Leucosyrinx
* Littorina
* A living Lunatia moon sea snail Lunatia
* Macoma
** †Macoma balthica
* Macrocallista
* Mactra – report made of unidentified related form or using admittedly obsolete nomenclature
* Martesia
* Melanella
* Mercenaria
** †Mercenaria mercenaria
* †Metatomarctus
* Metula
* Fossilized shell of a Modiolus, or horsemussel Modiolus
* †Monosaulax
* Morus
* Mulinia
** †Mulinia lateralis
* Murexiella
* †Mya
** †Mya arenaria
* Mytilopsis
* Mytilus
** †Mytilus edulis
* Nassarius
** †Nassarius vibex
* Neverita
* Notorynchus
* Nucula
* Oliva
* Ophisaurus
* Panopea
* †Paracynarctus
* †Parahippus
** †Parahippus leonensis
* Pecten
* Petricola
** †Petricola pholadiformis
* †Phocageneus
* Pholas
* Polystira
* †Ptychosalpinx
* Rhincodon
* Scaphella
* Fossilized skull of the Miocene toothed whale Schizodelphis †Schizodelphis
* Seila
** †Seila adamsii
* Semele
* Serpulorbis
* Sinum
* Siphonalia
* Life restoration of the Oligocene-Miocene shark-toothed dolphin Squalodon †Squalodon
** †Squalodon calvertensis
* Squalus
* Squatina
* Stewartia
* Tagelus
* Tegula
* Teinostoma
* Terebra
* Trigonostoma
* Trochita
* Turritella
* †Tylocephalonyx – or unidentified comparable form
* Typhis
* Uca
** A living Uca pugnax, or Atlantic marsh fiddler crab †Uca pugnax
* Urosalpinx
* Yoldia