List of the Mesozoic life of Arkansas

This list of the Mesozoic life of Arkansas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arkansas and are between 252.17 and 66 million years of age.

A[]

• †
  • †
• †
  • † – type locality for species
• • † – type locality for species
• †
  • †
• †
• 

  Interior and exterior of a shell of an Anomia, or jingle shell
  †Anomia
  • †
  • †
• †
  • †
• †

B[]

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

  Fossil of the sauropod dinosaur footprint ichnogenus Brontopodus
  †Brontopodus
  • †
• †
  • †

C[]

• Cadulus
  • †
• Caestocorbula
  • †Caestocorbula crassaplica
  • †Caestocorbula crassiplica
• †
  • †
• †
  • † – type locality for species
• 

  A living Caryophyllia solitary coral
  Caryophyllia
  • †
• †
  • †
• †Chedighaii – type locality for genus
  • † – type locality for species
• † – type locality for genus
  • † – type locality for species
• †Cirroceras
  • †
• †
• †
  • †
• Cliona
• Corbicula
  • †
• Crassatella
  • †
• †Crenella
  • †Crenella serica
• 

  Shell of a Cucullaea, or false ark shell
  Cucullaea
  • †Cucullaea capax
• Cylichna
• †Cymella
  • †
• †
  • †
  • †

D[]

• †Dentalium
  • †Dentalium leve
• †Desmophyllites
  • †
• †
  • †
• †
  • † – type locality for species
• †Didymoceras
  • †Didymoceras binodosum
  • †
  • †
  • †
  • †
  • †
  • †Didymoceras platycostatum
  • †
• †
  • † – type locality for species
  • † – type locality for species
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Discoscaphites
  †Discoscaphites
  • †Discoscaphites conradi
• †Douvilleiceras

E[]

• †Echinocorys
  • †
• • † – type locality for species
• † – tentative report
  • † – type locality for species
  • † – type locality for species
• †Eutrephoceras
• 

  Interior of a fossilized shell of the Jurassic-Cretaceous foam oyster Exogyra
  †Exogyra
  • †Exogyra costata
  • †Exogyra ponderosa

F[]

• †
  • †
• †
  • †

G[]

• 

  Fossilized shell of the Cretaceous ammonoid cephalopod Gaudryceras
  †Gaudryceras
• †
  • †
  • †
• †
  • †

H[]

• • †
  • †
• †Heminautilus
  • † – type locality for species
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Hoploscaphites
  †Hoploscaphites
  • †

I[]

• 

  Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size
  †Inoceramus
• †
  • † – type locality for species

J[]

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Jeletzkytes
  †Jeletzkytes
  • †Jeletzkytes nodosus

L[]

• †
  • †
• Limatula
  • †
• †Linthia
  • †

M[]

• • †
  • †
• †Mathilda
  • † – or unidentified related form
• †Menuites
  • † – or unidentified comparable form
• †
  • † – type locality for species
• 

  Fossilized shell of the Late Cretaceous-Paleogene sea urchin Micraster
  †Micraster
  • †
• Micropora – tentative report

N[]

• †Naomichelys
• †
  • † – or unidentified comparable form
• 

  Restoration of several species of the Late Cretaceous ammonoid cephalopod Nostoceras
  †Nostoceras
  • †Nostoceras approximans
  • †
  • †
  • †
  • †
  • †
  • †
  • †
  • †
  • †
• Nuculana
  • †

O[]

• †
  • †

P[]

• †Pachydiscus
  • †
• Panopea
  • †
• †Placenticeras
• 

  Restoration of the Late Cretaceous mosasaur Platecarpus
  †Platecarpus
• †
• † – type locality for genus
  • † – type locality for species
• †Protocardia
  • †
• †
  • †
• †
  • †
• †
• †
  • † – type locality for species
  • †
• †Pteria
• †Pterotrigonia
  • †Pterotrigonia thoracica
• • †
• Pycnodonte
  • †
  • †Pycnodonte vesicularis
• †

R[]

• • † – type locality for species

S[]

• Serpula
• †
  • † – or unidentified comparable form
• †
  • † – type locality for species
  • †
• †Sphenodiscus
• 

  Shell of a Spondylus, or spiny oyster
  Spondylus
• † – type locality for genus
  • † – type locality for species
• Striarca
• †
• †Stylina
  • † – type locality for species
• †
  • †
  • †

T[]

• †Tenea
  • †
• †Thamnasteria
  • † – type locality for species
• 

  Mounted fossilized skeleton of the Late Cretaceous sea turtle Toxochelys
  †Toxochelys – type locality for genus
  • †Toxochelys latiremis – type locality for species
• Trachycardium
• †
  • †
• †
  • † – type locality for species
  • † – type locality for species
• Turritella
  • †Turritella bilira
  • †Turritella trilira

U[]

• †Uhligella – tentative report

V[]

• †
  • †

Z[]

• • † – type locality for species

References[]

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021. {{cite web}}: |author= has generic name (help)