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The invertebrates of Arkansas's Cretaceous sea included clams, echinoids, oysters, and snails. [4] During the Cretaceous, Arkansas was home to Belemnitella, Exogyra, Ostrea, Turritella, and other marine invertebrates in the Arkadelphia area of Clark County. [1] Fish of the same age left behind teeth in the area near Saratoga in Hempstead County.
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. Precambrian [ edit ]
This list of the Paleozoic 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 541 and 252.17 million years of age.
Fishes of Arkansas. Fayetteville, Arkansas: The University of Arkansas Press. ISBN 1-55728-001-0. "Aquatic Fish Report" (PDF). Arkansas Wildlife Action Plan. Little Rock: Arkansas Game and Fish Commission. 2015
A few living forms, such as the coelacanth are also referred to as prehistoric fish, or even living fossils, due to their current rarity and similarity to extinct forms. Fish which have become recently extinct are not usually referred to as prehistoric fish. Lists of various prehistoric fishes include: List of prehistoric jawless fish; List of ...
As a species, sturgeon are one of the oldest still swimming. Having first emerged over 120 million years ago , they lived alongside dinosaurs and survived the catastrophic hurdles and curveballs ...
Bransonella is an extinct genus of marine Xenacanth which lived during the Paleozoic era. [3] It is known only from teeth which are easily distinguished from related genera by ornamentation on the cusp shaped like an inverted "V" and fin spines Teeth attributed to this genus are small, no greater than 2 millimeters.
The family Polyodontidae comprises six known species: three fossil species from western North America, one fossil species from China, [16] one recently extinct species from China (the Chinese paddlefish, Psephurus gladius; last recorded 2003), [19] [20] and the single extant species, the American paddlefish, native to the Mississippi River ...