Reptilia - Testudines - Trionychidae

Alternative combinations: Axestus byssinus, Trionyx byssinus

Synonyms: Eugenechelys robertemryi Chkhikvadze 2008, Eugenichelys robertemryi Chkhikvadze 2008, Temnotrionyx manducans Hay 1908

Full reference: E. D. Cope. 1872. Descriptions of some new Vertebrata from the Bridger Group of the Eocene. Proceedings of the American Philosophical Society 12:460-465

Belongs to Axestemys according to N. S. Vitek and W. G. Joyce 2015

See also Chkhikvadze 2000, Cope 1872, Cope 1873, Cope 1884, Danilov and Vitek 2013, Danilov and Vitek 2013, Gaffney 1979, Hay 1899, Hay 1902, Hay 1908, Hay 1930 and Vitek 2012

Sister taxa: Axestemys byssina, Axestemys cerevisia, Axestemys erquelinnensis, Axestemys infernalis, Axestemys montinsana, Axestemys quinni, Axestemys splendidus, Axestemys vittata, Rafetus (Axestemys) exquisitus, Rafetus (Axestemys) nelsoni

Type specimens:

• Axestemys byssinus: USNM 4089, a partial skeleton (xiphiplastron, cervical vertebra, isolated ilium, several fragmentary appendicular elements). Its type locality is Black's Fork, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
• Eugenechelys robertemryi: USNM 12589, a partial skeleton (skull fragments, partial left dentary, left hyoplastron, right hypoplastron, left and right xiphiplastron). Its type locality is South Elk Creek (Diatryma steini type locality), which is in a Wasatchian terrestrial horizon in the Willwood Formation of Wyoming.
• Temnotrionyx manducans: AMNH 5929, a partial skeleton (left quadrate and prootic, a portion of the right maxilla, the median portion of the nuchal, one neural, probably the fifth or sixth, the sixth costal plate nea). Its type locality is Near the mouth of Cottonwood Creek (Bridger B), which is in a Bridgerian terrestrial horizon in Wyoming.

Ecology: aquatic piscivore-carnivore

Distribution:

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Specimen images are retrieved through the ePANDDA API.