Adocus wyomingensis Leidy 1869 (turtle)

Reptilia - Testudines - Adocidae

ATTENTION: Tangled Taxon > Emys wyomingensis (= Echmatemys wyomingensis) has been named in Leidy (1869) based on a left epiplastron (see above). One year later, Leidy (1870a) named Baptemys wyomingensis from the same locality, based on an almost complete shell (Leidy 1873, pl. 11). Leidy (1870a) raised some doubts on the validity of Emys wyomingensis by saying that the epiplastron could belong the same animal as Baptemys wyomingensis. I am not sure if by that he meant the same individual or the same species, but the epiplastron of Emys wyomingensis is certainly a pan-testudinoid and clearly distinct from Baptemys. In the same year, Cope (1869–70) already suggested the synonymy between the two species, and placed them under Adocus. But shortly after, Leidy (1873) and Hay (1908) provided further evidence on the distinction of these two species. However, in the literature these taxa often get confused.

Alternative combination: Baptemys wyomingensis

Synonyms: Baena ponderosa Cope 1873, Baptemys fluviatilis Hay 1908

Full reference: J. Leidy. 1869. Notice of some extinct vertebrates from Wyoming and Dakota. Proceedings of the Academy of Natural Sciences of Philadelphia 21:63-67

Belongs to Adocus according to E. D. Cope 1870

See also Bourque et al. 2015, Cope 1873, Cope 1884, Hay 1902, Hay 1908 and Joyce and Bourque 2016

Sister taxa: Adocus agilis, Adocus aksary, Adocus amtgai, Adocus beatus, Adocus bossi, Adocus bostobensis, Adocus dzhurtasensis, Adocus firmus, Adocus foveatus, Adocus hesperius, Adocus inexpectatus, Adocus kazachstanica, Adocus kirtlandius, Adocus kizylkumensis, Adocus lineolatus, Adocus microglypha, Adocus onerosus, Adocus orientalis, Adocus planus, Adocus pravus, Adocus sengokuensis, Adocus striatula, Adocus syntheticus, Alamosemys substricta, Homorophus insuetus

Type specimens:

  • Adocus wyomingensis: ANSP 10074, a partial shell (epiplastron). Its type locality is A few miles from Fort Bridger, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.
  • Baena ponderosa: USNM 4056, a partial shell. Its type locality is Hams Fork, which is in a Bridgerian terrestrial horizon in Wyoming.
  • Baptemys fluviatilis: AMNH 4913, a partial shell (a mass of gray sandstone, broken into two pieces, which bears considerable portions of the carapace and impressions of other portions and a fragment of the plas).

Ecology: aquatic omnivore


• Eocene of United States (21: Colorado, Wyoming collections)

Total: 21 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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