# 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

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* F
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* †Acutostrea
** †Acutostrea plumosa
* †Aechmella
** †Aechmella ozanensis – type locality for species
* Alderina
** †Alderina inuber – type locality for species
* †Ambigostrea
** †Ambigostrea tecticosta
* †Anchura
* Interior and exterior of a shell of an Anomia, or jingle shell †Anomia
** †Anomia argentaria
** †Anomia texana
* †Aphrodina
** †Aphrodina tippana
* †Atreta

## B

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* †Baculites
** †Baculites crickmayi
** †Baculites ovatus
** †Baculites reduncus
** †Baculites taylorensis
** †Baculites undatus
* †Bellifusus
** †Bellifusus spinosus
* Botula
** †Botula conchafodentis
* Fossil of the sauropod dinosaur footprint ichnogenus Brontopodus †Brontopodus
** †Brontopodus birdi
* †Buccinopsis
** †Buccinopsis solida

## C

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* Cadulus
** †Cadulus obnutus
* Caestocorbula
** †Caestocorbula crassaplica
** †Caestocorbula crassiplica
* †Camptonectes
** †Camptonectes bubonis
* †Cardiaster
** †Cardiaster deciper – type locality for species
* A living Caryophyllia solitary coral Caryophyllia
** †Caryophyllia konincki
* †Castanopora
** †Castanopora spooneri
* †Chedighaii – type locality for genus
** †Chedighaii barberi – type locality for species
* †Cheethamia – type locality for genus
** †Cheethamia howei – type locality for species
* †Cirroceras
** †Cirroceras conradi
* †Classopollis
* †Classostrobus
** †Classostrobus arkansensis
* Cliona
* Corbicula
** †Corbicula arkansensis
* Crassatella
** †Crassatella vadosa
* †Crenella
** †Crenella serica
* Shell of a Cucullaea, or false ark shell Cucullaea
** †Cucullaea capax
* Cylichna
* †Cymella
** †Cymella bella
* †Cyprimeria
** †Cyprimeria alta
** †Cyprimeria coonensis

## D

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* †Dentalium
** †Dentalium leve
* †Desmophyllites
** †Desmophyllites diphylloides
* †Dhondtichlamys
** †Dhondtichlamys venustus
* †Diacanthopora
** †Diacanthopora langi – type locality for species
* †Didymoceras
** †Didymoceras binodosum
** †Didymoceras clardyi
** †Didymoceras cochleatum
** †Didymoceras donezianum
** †Didymoceras draconis
** †Didymoceras mortoni
** †Didymoceras platycostatum
** †Didymoceras tortum
* †Dionella
** †Dionella racemata – type locality for species
** †Dionella vivistratensis – type locality for species
* Fossilized shell of the Late Cretaceous ammonoid cephalopod Discoscaphites †Discoscaphites
** †Discoscaphites conradi
* †Douvilleiceras

## E

* A
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* F
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* †Echinocorys
** †Echinocorys texanus
* Ellisina
** †Ellisina saratogaensis – type locality for species
* †Escharoides – tentative report
** †Escharoides danei – type locality for species
** †Escharoides erymnos – type locality for species
* †Eutrephoceras
* Interior of a fossilized shell of the Jurassic-Cretaceous foam oyster Exogyra †Exogyra
** †Exogyra costata
** †Exogyra ponderosa

## F

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* †Flemingostrea
** †Flemingostrea subspatula
* †Frurionella
** †Frurionella parvipora

## G

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* Fossilized shell of the Cretaceous ammonoid cephalopod Gaudryceras †Gaudryceras
* †Granocardium
** †Granocardium bowenae
** †Granocardium tholi
* †Gryphaeostrea
** †Gryphaeostrea vomer

## H

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* Hemiaster
** †Hemiaster humphreysanus
** †Hemiaster wetherbyi
* †Heminautilus
** †Heminautilus stantoni – type locality for species
* Fossilized shell of the Late Cretaceous ammonoid cephalopod Hoploscaphites †Hoploscaphites
** †Hoploscaphites pumilis

## I

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

## J

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

## L

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* †Lewyites
** †Lewyites oronensis
* Limatula
** †Limatula acutilineata
* †Linthia
** †Linthia variabilis

## M

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* Malletia
** †Malletia longfrons
** †Malletia longifrons
* †Mathilda
** †Mathilda ripleyana – or unidentified related form
* †Menuites
** †Menuites portlocki – or unidentified comparable form
* †Micrabacia
** †Micrabacia arkansasensis – type locality for species
* Fossilized shell of the Late Cretaceous-Paleogene sea urchin Micraster †Micraster
** †Micraster americanus
* Micropora – tentative report

## N

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* †Naomichelys
* †Neancyloceras
** †Neancyloceras bipunctatum – or unidentified comparable form
* Restoration of several species of the Late Cretaceous ammonoid cephalopod Nostoceras †Nostoceras
** †Nostoceras approximans
** †Nostoceras archiacianum
** †Nostoceras arkansanum
** †Nostoceras colubriformis
** †Nostoceras helicinus
** †Nostoceras hyatti
** †Nostoceras multituberculatum
** †Nostoceras pauper
** †Nostoceras plerucostatum
** †Nostoceras pulcher
* Nuculana
** †Nuculana whitfieldi

## O

* A
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* †Oxybeloceras
** †Oxybeloceras crassum

## P

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* †Pachydiscus
** †Pachydiscus arkansanus
* Panopea
** †Panopea subplicata
* †Placenticeras
* Restoration of the Late Cretaceous mosasaur Platecarpus †Platecarpus
* †Pleuriocardia
* †Prionochelys – type locality for genus
** †Prionochelys nauta – type locality for species
* †Protocardia
** †Protocardia spillmani
* †Pseudofrenelopsis
** †Pseudofrenelopsis parceramosa
* †Pseudokossmaticeras
** †Pseudokossmaticeras galicianum
* †Pseudophyllites
* †Pseudosaynella
** †Pseudosaynella fimbriata – type locality for species
** †Pseudosaynella walcotti
* †Pteria
* †Pterotrigonia
** †Pterotrigonia thoracica
* Pulvinites
** †Pulvinites argenteus
* Pycnodonte
** †Pycnodonte vesiculare
** †Pycnodonte vesicularis
* †Pyropsis

## R

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* Ramphonotus
** †Ramphonotus pedunculatus – type locality for species

## S

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* Serpula
* †Solenoceras
** †Solenoceras texanum – or unidentified comparable form
* †Solenophragma
** †Solenophragma elongatum – type locality for species
** †Solenophragma ovatum
* †Sphenodiscus
* Shell of a Spondylus, or spiny oyster Spondylus
* †Stictostega – type locality for genus
** †Stictostega durhami – type locality for species
* Striarca
* †Striaticostatum
* †Stylina
** †Stylina arkansasensis – type locality for species
* †Syncyclonema
** †Syncyclonema simplicius
** †Syncyclonema travisanus

## T

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* †Tenea
** †Tenea parilis
* †Thamnasteria
** †Thamnasteria imlayi – 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
* †Trachyscaphites
** †Trachyscaphites redbirdensis
* †Tricephalopora
** †Tricephalopora arkansasensis – type locality for species
** †Tricephalopora larwoodi – type locality for species
* Turritella
** †Turritella bilira
** †Turritella trilira

## U

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* †Uhligella – tentative report

## V

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* †Veniella
** †Veniella conradi

## Z

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* Zangerlchelys
** †Zangerlchelys arkansaw – type locality for species