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

The Paleobiology Database records no known occurrences of Precambrian fossils in Alabama.

• †Adnatoceras
• †Amphiscapha
• †Amplexus
• †Ananaspis
• †Anthracoceras
• †Aphelaeceras
• †Arcanoceras
• †Archaeocidaris
• Archaeolithophyllum – tentative report

• 

  †Archimedes
• †Archimylacris
• †Arkanites
• †Athyris
• †Atrypa
• †Aviculopecten
  • †Aviculopecten inspeciosus
  • †Aviculopecten jennyi
  • †Aviculopecten morrowensis
  • †Aviculopecten squamula
• † Avonia
• †Axinolobus
• †Bactritimimus
• †Baschkirites
• †Bellerophon
  • †Bellerophon welshi
• †Bisatoceras
• †Bistrialites
• †Branneroceras
• †Cancelloceras
• †Cavusgnathus
• †Cheirurus
• †Chonetes
• †Cleiothyridina
• †Composita
• †Cornuproetus
• †Cravenoceras
• †Cypricardinia – tentative report

• 

  †Dalmanites – type locality for genus
• †Deiphon
• †Delops
• †Diacalymene
• †Dicoelosia
• †Dolorthoceras
• †Echinaria
• †Edmondia
• †Encrinurus
• †Endolobus
• †Eophacops
• †Eospirifer
• †Eowellerites

• 

  †Eucalyptocrinites
• †Euomphalus
• †Gastrioceras
• Gastrochaenolites
• †Girvanella
• †Glyptambon – type locality for genus
• †Glyptopleura
• †Gnathodus
• †Goniatites
  • †Goniatites crenistria – or unidentified related form
• †Hematites
• †Irvingella
• †Kazakhstania – tentative report
• †Lingula
• †Liroceras – tentative report
• †Mariceras
• †Meristina

• 

  †Metacoceras
• †Michelinoceras
• †Naticopsis
• †Ozarcus – type locality for genus
  • †Ozarcus mapesae – type locality for species
• †Pachylyroceras
• †Paladin
• †Paleoconus
• †Paralegoceras
• †Pentremites
• †Peripetoceras
• †Platyceras
• †Plectodonta – tentative report
• †Plicochonetes
• †Posidonia
• †Proetus
• †Quinnites
• †Rayonnoceras
• †Sandia
• †Solenochilus
• †Solenomorpha

• 

  †Sphaerexochus
• †Spirifer
• †Stearoceras
• †Stigmaria
• †Stroboceras
• †Sutherlandia
• †Tesuquea
• †Triboloceras – tentative report
• †Tripteroceroides – tentative report
• Trypanites
• †Tylonautilus
• †Valhallites
• †Wilkingia
• †Zia

• †Anomia
• †Baculites
  • †Baculites crickmayi
  • †Baculites ovatus
• Botula
  • †Botula conchafodentis

• 

  †Brontopodus
• Cadulus
• Caestocorbula
  • †Caestocorbula crassaplica
  • †Caestocorbula crassiplica
• Caryophyllia
• †Cirroceras
• Cliona
• Corbicula
• †Crenella
  • †Crenella serica

• 

  Cucullaea
  • †Cucullaea capax
• Cylichna
• †Cymella
• †Dentalium
  • †Dentalium leve
• †Desmophyllites
• †Didymoceras
  • †Didymoceras binodosum
  • †Didymoceras platycostatum
• †Discoscaphites
  • †Discoscaphites conradi
• †Douvilleiceras
• †Echinocorys
• †Eutrephoceras

• 

  †Exogyra
  • †Exogyra costata
  • †Exogyra ponderosa
• †Gaudryceras
• †Heminautilus
• †Hoploscaphites
• †Inoceramus
• †Jeletzkytes
  • †Jeletzkytes nodosus
• Limatula
• †Linthia
• †Mathilda
• †Menuites
• †Micraster
• Micropora – tentative report
• †Naomichelys
• †Nostoceras
  • †Nostoceras approximans
• †Pachydiscus
• Panopea
• †Placenticeras

• 

  †Platecarpus
• †Protocardia
• †Pteria
• †Pterotrigonia
  • †Pterotrigonia thoracica
• Pycnodonte
  • †Pycnodonte vesicularis
• Serpula
• †Sphenodiscus
• Spondylus
• †Stylina
• †Tenea
• †Thamnasteria

• 

  †Toxochelys – type locality for genus
  • †Toxochelys latiremis – type locality for species
• Trachycardium
• Turritella
  • †Turritella bilira
  • †Turritella trilira
• †Uhligella – tentative report

• Acteon
• Agaronia
• Antalis
• Architectonica
• Arius – or unidentified comparable form
• Astrangia
• Athleta
• Barbatia

• 

  †Basilosaurus
  • †Basilosaurus cetoides
• Blarina
  • †Blarina brevicauda
• †Bootherium
  • †Bootherium bombifrons
• Brachidontes
• †Brachyprotoma
  • †Brachyprotoma obtusata
• Bullia
• Caestocorbula
• Canis

  • 

    †Canis armbrusteri
  • †Canis latrans
• Carcharhinus
• Carcharias
• Castor
  • †Castor canadensis
• Cervus
• Chlamys
• Clavilithes
• Coluber

  • 

    †Coluber constrictor – or unidentified comparable form
• Conomitra
• Conus
• Corbula
• Crassostrea
• Crotalus
• Cytherea – report made of unidentified related form or using admittedly obsolete nomenclature
• Dasyatis
• Dentalium
• †Diaphyodus
• Epitonium
• Eptesicus
  • †Eptesicus fuscus
• Equus

  • 

    †Equus scotti – tentative report
• Erethizon
  • †Erethizon dorsatum
• Galeocerdo
• Galeodea
• Galeorhinus
• Geomys
  • †Geomys bursarius
• Ginglymostoma
• Hemipristis
  • †Hemipristis curvatus
• Hemisinus
• Hexaplex

• 

  †Iridomyrmex
  • †Iridomyrmex mapesi – type locality for species
• †Lacunaria
• Latirus
• Lepisosteus
• Lepus
  • †Lepus alleni
  • †Lepus americanus – tentative report
• †Linthia
• Lynx
  • †Lynx rufus
• †Mammuthus

  • 

    †Mammuthus columbi
• Marmota
  • †Marmota monax
• Mephitis
  • †Mephitis mephitis
• Mesalia
• Microtus
• †Miracinonyx
  • †Miracinonyx studeri
• Mustela
  • †Mustela richardsonii
• Myliobatis

• 

  †Mylohyus
  • †Mylohyus fossilis
• Myotis
• Mytilus
• Nassarius
• Neogale
  • †Neogale frenata
  • †Neogale vison
• Neotoma
• Nucula
• Odocoileus
  • †Odocoileus virginianus
• Ondatra
• Ostrea
• †Pachecoa
• Panthera

  • 

    †Panthera onca
• Pekania
• Peromyscus
• Pitar
• Pituophis
• Pitymys
• Pleuromeris
• Polinices

• 

  Pristis
• Procyon
  • †Procyon lotor
• Propeamussium
• †Protocardia – report made of unidentified related form or using admittedly obsolete nomenclature
• Pseudoliva
• Reithrodontomys
• Retusa
• Scalopus
  • †Scalopus aquaticus
• †Sinistrella

• 

  †Smilodon
  • †Smilodon fatalis
• Sorex
  • †Sorex cinereus
  • †Sorex fumeus
  • †Sorex minutus
  • †Sorex monticolus
• Spermophilus
  • †Spermophilus tridecemlineatus – tentative report
• Sphyraena
• Spilogale
  • †Spilogale putorius – tentative report

• 

  Spisula
• Sylvilagus
  • †Sylvilagus floridanus – tentative report
• Tamiasciurus
  • †Tamiasciurus hudsonicus
• Terebra
• Teredo
• Trichiurus
• Turritella
• Urocyon

  • 

    †Urocyon cinereoargenteus
• Ursus
  • †Ursus americanus
• Venericardia
• Vulpes
• Yoldia

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.