Reptilia - Testudines - Trionychidae

Alternative spelling: Plastomenidae

Full reference: O. P. Hay. 1902. Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey 179:1-868

Parent taxon: Trionychidae according to W. G. Joyce et al. 2009

Sister taxa: Amyda, Aspideretes, Conchochelys, Crassithecachelys, Cyclanorbis, Cycloderma, Eugenechelys, Eurycephalochelys, Gilmoremys, Hummelichelys, Lissemys, Paleotrionyx, Platypeltis, Rafetini, Sinamyda, Sinaspideretes, Temnotrionyx, Trionychinae, Zangerlichelys

Subtaxa: Helopanoplia, Hutchemys, Plastomenus

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