Still needs work on history of taxonomy and understanding of amphibians over the past 300 years, and " Evolution " or " Classification " could do with some more material on some of the prehistoric amphibians such as " Eryops " and predator ones . contribs ) 14 : 19, 12 April 2012 ( UTC)
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The genus includes the type species " Parioxys ferricolus ", named by paleontologist Edward Drinker Cope in 1878, and the species " Perioxys bolli ", named by paleontologist Robert L . Carroll in 1964 . " Parioxys " was first classified as a close relative of " Eryops ", another temnospondyl from Texas, and was later assigned to the family Trematopidae.
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For an organism to live in a gravity-neutral aqueous environment, then colonize one that requires an organism to support its entire weight and possess a mechanism to mitigate dehydration, required significant adaptations or exaptations within the overall body plan, both in form and in function . " Eryops ", an example of an animal that made such adaptations, refined many of the traits found in its fish ancestors.
