Leptomeryx evansi Leidy 1853 (ruminant)

Mammalia - Ungulata - Leptomerycidae

Synonyms: Leptomeryx lenis Cook 1934, Trimerodus cedrensis Cope 1873, Trimerodus cedreusis Cope 1873

Full reference: J. Leidy. 1853. [On leave granted, Dr. Leidy made the following coinmnunication]. Proceedings of the Academy of Natural Sciences of Philadelphia 6:392-394

Belongs to Leptomeryx according to W. W. Korth and M. E. Diamond 2002

See also Cook 1934, Cope 1873, Cope 1874, Frick 1937, Hay 1902, Heaton and Emry 1996, Leidy 1853, Leidy 1857, Leidy 1873, Scott 1940 and Vislobokova 2001

Sister taxa: Leptomeryx agatensis, Leptomeryx antecedens, Leptomeryx blacki, Leptomeryx elissae, Leptomeryx esulcatus, Leptomeryx exilis, Leptomeryx mammifer, Leptomeryx obliquidens, Leptomeryx semicinctus, Leptomeryx significans, Leptomeryx speciosus, Leptomeryx yoderi

Type specimens:

  • Leptomeryx evansi: USNM 157, a partial skull (partial skull and associated mandible)
  • Leptomeryx lenis: No. HC503, a partial skull (parts of both maxillae and right lower jaw). Its type locality is Sowbelly Creek, which is in a Whitneyan terrestrial horizon in the Brule Formation of Nebraska.
  • Trimerodus cedrensis:

Ecology: ground dwelling frugivore


• Oligocene of Canada (2: Saskatchewan collections), United States (33: Colorado, Montana, Nebraska, North Dakota, South Dakota, Wyoming)

• Eocene to Oligocene of United States (1: Wyoming)

• Eocene of Canada (1: British Columbia), United States (7: Colorado, Montana, Nebraska, Wyoming)

Total: 44 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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