The Recently Extinct Plants and Animals Database

Equus semiplicatus Cope, 1893

Stiltlegged horse



Taxonomy & Nomenclature

Synonym/s: Onager semiplicatus Cope, 1893


Conservation Status

Last record: Late Pleistocene/Holocene



Texas, USA


Biology & Ecology










Original scientific description:

E. D. Cope. 1893. A preliminary report on the vertebrate paleontology of the Llano Estacado. Fourth Annual Report of the Geological Survey of Texas 1892:11-136.


Other references:

Azzaroli, A. (1998). The genus Equus in North America: The Pleistocene species = Le genre Equus en Amérique du Nord - Les espèces du Pléistocène. Palaeontographia Italica 85: 1-60. [Abstract]

W. W. Dalquest and G. E. Schultz. 1992. Ice Age mammals of northwestern Texas

J. W. Gidley. 1901. Tooth Characters and Revision of the North American Species of the Genus Equus. Bulletin of the American Museum of Natural History 14(9):1-60

R. C. Hulbert. 1995. Equus from Leisey Shell Pit 1A and other Irvingtonian localities from Florida. Bulletin of the Florida Museum of Natural History 37(17):553-602

B. Kurten and E. Anderson. 1980. Pleistocene mammals of North America 1-442.

J. H. Quinn. 1957. Pleistocene Equidae of Texas. Bureau of Economic Geology, The University of Texas Report of Investigations 33:1-47.

Smith F.A., Lyons S.K., Ernest S.K.M., Jones K.E., Kaufman D.M., Dayan T., Marquet P.A., Brown J.H., Haskell J.P. 2003 Body mass of late Quaternary mammals. Ecology 84(12), 3403-3403.

Weinstock J., Willerslev E., Sher A., Tong W., Ho S.Y.W., Rubenstein D., Storer J., Burns J., Martin L., Bravi C., et al. 2005 Evolution, Systematics, and Phylogeography of Pleistocene Horses in the New World: A Molecular Perspective. PLoS Biology 3(8), e241.


<< Back to the Perissodactyla (Odd-toed Ungulates) database