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.

Selected Mesozoic taxa of Delaware

 * †Acteon
 * †Aenona – tentative report
 * †Agerostrea
 * †Ampullina
 * †Anaklinoceras
 * †Anomia
 * †Anomoeodus
 * Apsopelix sp.jpg †[[Apsopelix]]
 * †Apsopelix anglicus
 * †Arca
 * Architectonica – or unidentified comparable form
 * Arrhoges
 * Astarte – tentative report
 * †Avellana
 * †Baculites
 * †Baculites haresi
 * †Baculites ovatus
 * Barbatia
 * Belemnitella mucronata.jpg †[[Belemnitella]]
 * †Belemnitella americana
 * Bernaya
 * †Bonnerichthys
 * †Bulla
 * Cadulus
 * Caestocorbula
 * †Caestocorbula crassiplica
 * †Calliomphalus
 * †Calliomphalus americanus – tentative report
 * †Calliomphalus nudus
 * Capulus
 * †Caveola
 * Cerithium
 * Clavagella
 * Clidastes proph1DB.jpg †[[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
 * Dryptosaurus by Durbed.jpg †[[Dryptosaurus]]
 * †Ecphora – tentative report
 * Emarginula
 * †Enchodus
 * †Euspira
 * †Eutrephoceras
 * †Exiteloceras
 * †Exogyra
 * †Exogyra cancellata
 * †Exogyra costata
 * †Exogyra ponderosa
 * Gastrochaena
 * †Gegania
 * Ginglymostoma
 * Globidens dakotensis skull.jpg †[[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
 * Ammonite Jeletzkytes.jpg †[[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
 * Odontaspis ferox 3.jpg [[Odontaspis]]
 * †Ornithomimus
 * Ostrea
 * †Pachydiscus
 * †Pachymelania
 * Panopea
 * †Paralbula
 * † Paranomia
 * Patella
 * †Pecten
 * Pholadomya
 * †Pholadomya occidentalis
 * Pholas – tentative report
 * †Pinna
 * †Placenticeras
 * Plicatula
 * †Pseudocorax
 * Pteranodon longiceps mmartyniuk wiki.png †[[Pteranodon]] – tentative report
 * †Pteria
 * †Pterotrigonia
 * †Pterotrigonia eufaulensis
 * †Ptychotrygon
 * Pycnodonte
 * †Pycnodonte mutabilis
 * Rhinobatos
 * †Rhombodus
 * Ringicula
 * †Sargana
 * †Scapanorhynchus
 * †Scapanorhynchus texanus
 * †Scaphites
 * †Scaphites hippocrepis
 * †Sclerorhynchus
 * Serpula
 * Spondylus
 * Squalicorax falcatusDB.jpg [[Squalicorax]]
 * †Squalicorax falcatus
 * †Squalicorax kaupi
 * †Squalicorax pristodontus
 * Squatina
 * †Stephanodus
 * Tellina
 * †Tenea
 * †Toxochelys
 * Trachycardium
 * †Trachycardium eufaulensis
 * †Trigonia
 * Trionyx
 * Turritella
 * †Turritella tippana
 * †Turritella trilira
 * †Turritella vertebroides
 * Tylosaurus prorDB15.jpg †[[Tylosaurus]]
 * Tympanotonos – or unidentified comparable form
 * Xenophora
 * †Xiphactinus

Selected Cenozoic taxa of Delaware

 * Amphicyon-ingens reconstruction.jpg †[[Amphicyon]]
 * Anadara
 * †Anadara ovalis
 * †Anchitheriomys
 * †Anchitherium
 * Anomia
 * †Anomia simplex
 * †Archaeohippus
 * Argopecten
 * †Argopecten irradians
 * Astarte elliptica 2008-09-07-4.jpg 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
 * Isurus hastalis labiale cm.JPG, 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
 * Cynelos lemanensis.JPG †[[Cynelos]]
 * Diastoma
 * Dinocardium
 * Diodora
 * Donax
 * Dosinia
 * †Ecphora
 * Ensis
 * †Ensis directus
 * Epitonium
 * Euspira
 * †Euspira heros
 * Ficus
 * Tiger shark.jpg, or tiger shark]] Galeocerdo''
 * †Galeocerdo aduncus
 * †Galeocerdo contortus
 * Gavia
 * Gemma
 * †Gemma gemma
 * Geochelone
 * Geukensia
 * †Geukensia demissa
 * Glossus
 * Glycymeris
 * Hemipristis
 * Hemipristis serra snaggettoth shark teeth 007.jpg †[[Hemipristis serra]]
 * Ilyanassa
 * †Ilyanassa obsoleta
 * †Ilyanassa trivittata
 * †Inodrillia
 * †Inodrillia whitfieldi
 * Iphigenia
 * Isognomon
 * Isurus
 * †Isurus oxyrinchus
 * Kinosternon
 * †Leptophoca
 * †Leptophoca lenis
 * Leucosyrinx
 * Littorina
 * Euspira lewisii 3 cropped.jpg [[Lunatia]]
 * Macoma
 * †Macoma balthica
 * Macrocallista
 * Mactra – report made of unidentified related form or using admittedly obsolete nomenclature
 * Martesia
 * Melanella
 * Mercenaria
 * †Mercenaria mercenaria
 * †Metatomarctus
 * Metula
 * Mytilidae - Modiolus species.JPG [[Modiolus (bivalve)|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
 * Cyrtodelphis sulcatus.JPG †[[Schizodelphis]]
 * Seila
 * †Seila adamsii
 * Semele
 * Serpulorbis
 * Sinum
 * Siphonalia
 * Squalodon BW.jpg †[[Squalodon]]
 * †Squalodon calvertensis
 * Squalus
 * Squatina
 * Stewartia
 * Tagelus
 * Tegula
 * Teinostoma
 * Terebra
 * Trigonostoma
 * Trochita
 * Turritella
 * †Tylocephalonyx – or unidentified comparable form
 * Typhis
 * Uca
 * Fiddler crab.jpg †[[Uca pugnax]]
 * Urosalpinx
 * Yoldia