ammonites
Polythorax Cope 1876 (turtle)

Reptilia - Testudines - Baenidae

Full reference: E. D. Cope. 1876. Descriptions of some vertebrate remains from the Fort Union Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:248-261

Parent taxon: Baenidae according to O. P. Hay 1908

Sister taxa: Australobaena, Baena, Baeninae, Baenodda, Boremys, Cedrobaena, Chisternon, Denazinemys, Eubaena, Eubaeninae, Gamerabaena, Hayemydinae, Hayemys, Neurankylinae, Neurankylus, Palatobaena, Palatobaeninae, Peckemys, Plesiobaena, Probaena, Stygichelys, Stygiochelys, Thescelus, Trinitichelys, Trinitychelyinae

Subtaxa: Polythorax missuriensis

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Ecology: