Amphibia - Nectridea

Full reference: E. D. Cope. 1875. Synopsis of the Extinct Batrachia from the Coal Measures. Report of the Geological Survey of Ohio 2:349-411

Parent taxon: Nectridea according to H. C. Maddin et al. 2012

Sister taxa: Arizonerpeton, Batrachiderpeton, Diceratosaurus, Diploceraspis, Keraterpeton, Keraterpetontidae, Scincosauridae, Scincosaurus, Urocordylidae, Urocordylus

Subtaxa: Ptyonius marshi, Ptyonius marshii, Ptyonius olisthmonaias

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Ecology: