Echmatemys stevensoniana Leidy 1870 (turtle)

Reptilia - Testudines - Pangeoemydidae

Alternative combination: Emys stevensonianus

Synonyms: Echmatemys aegle Hay 1908, Echmatemys cyane Hay 1908, Echmatemys ocyrrhoe Hay 1908, Echmatemys septaria Cope 1873, Emys septaria Cope 1873, Emys septarius Cope 1873

Full reference: J. Leidy. 1870. [Remarks on Poikilopleuron valens, Clidastes intermedius, Macrosaurus proriger, Baptemys wyomingensis, and Emys stevensonianus]. Proceedings of the Academy of Natural Sciences of Philadelphia 22(1):3-5

Belongs to Echmatemys according to E. Vlachos 2018

See also Cope 1873, Cope 1875, Cope 1882, Cope 1884, Hay 1902, Hay 1906, Hay 1908, Leidy 1870, Roberts 1962 and Zonneveld et al. 2000

Sister taxa: Echmatemys arethusa, Echmatemys callopyge, Echmatemys cibollensis, Echmatemys depressa, Echmatemys haydeni, Echmatemys jeanesi, Echmatemys lativertebralis, Echmatemys naomi, Echmatemys wyomingensis, Palaeotheca polycypha, Palaeotheca terrestris

Type specimens:

  • Echmatemys stevensoniana: USNM 963+965+967 (syntypes), a partial shell. Its type locality is A few miles from Fort Bridger, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
  • Echmatemys aegle: AMNH 5909 (holotype), a partial shell (complete plastron and some carapacial bones). Its type locality is Grizzly Buttes, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
  • Echmatemys cyane: AMNH 5924 (holotype), a partial shell. Its type locality is Grizzly Buttes, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
  • Echmatemys ocyrrhoe: AMNH 5933 (holotype), a shell. Its type locality is Church Buttes, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
  • Emys septarius: USNM 4088+4114 (syntype series), a partial shell (mostly complete plastron and partial carapace). Its type locality is Badlands of South Bitter Creek (Cope Collection), which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

Ecology: aquatic herbivore

Distribution:

• Eocene of United States (3: Colorado, Wyoming collections)

Total: 3 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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