The Recently Extinct Plants and Animals Database

Haringtonhippus francisci (Hay, 1915)

Stilt-legged horse, Stilt-legged onager, New World stilt-legged equid



Taxonomy & Nomenclature

Synonym/s: Equus francisci Hay, 1915 (original combination)


Conservation Status

Last record: Late Pleistocene





Biology & Ecology










Original scientific description:

Hay, Oliver P. (1915). [url=]Contributions to the Knowledge of the Mammals of the Pleistocene of North America[/url]. Proceedings of the United States National Museum 48(2086): 535-549.


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]

Bement, L. C. 1986. Mammalian faunal and cultural remains in the late Pleistocene deposits of Bonfire Shelter, 41VV218, Southwest Texas. University of Texas at Austin, i-vi + 73 pp.

Bravo-Cuevas, Victor Manuel and Jiménez-Hidalgo, Eduardo. (2018). Advances on the Paleobiology of Late Pleistocene mammals from central and southern Mexico, pp. 277-313. In: Huard, Gaeten and Gareau, Jeannine (eds.). The Pleistocene: Geography, Geology, and Fauna. New York: Nova Science Publishers.

Dalquest, W. W. 1979. The little horses (Genus Equus) of the Pleistocene of North America. American Midland Naturalist 101(1):241-244.

Harris, A. H. 1993. Quaternary vertebrates of New Mexico. Pp. 179-197, in Vertebrate Paleontology in New Mexico, New Mexico Museum of Natural History, Bulletin 2:i-vii, 1-338.

Heintzman, Peter D; Zazula, Grant D; MacPhee, Ross DE; Scott, Eric; Cahill, James A; McHorse, Brianna K; Kapp, Joshua D; et al. (2017). [url=]A new genus of horse from Pleistocene North America[/url]. eLife. 6: e29944.

Lundelius, E. L., Jr. 1984. A late Pleistocene mammalian fauna from Cueva Quebrada, Val Verde County, Texas. Pp. 456-481, in, Contributions in Quaternary vertebrate paleontology: A volume in memorial to John E. Guilday (H. H. Genoways and M. R. Dawson, eds.). Carnegie Museum of Natural History, Special Publication No. 8: i-v + 1-538.

Morgan, G. S., and L. F. Rinehart. 2007. Late Pleistocene (Rancholabrean) mammals from fissure deposits in the Jurassic Todilto Formation, White Mesa mine, Sandoval County, north-central New Mexico. New Mexico Geology 29(2):39-51.

Schultz, C. B., and E. B. Howard. 1935. The fauna of Burnet Cave, Guadalupe Mountains, New Mexico. Proceedings of the Academy of Natural Sciences of Philadelphia 87:273-298.

Skinner, M. F. 1942. The fauna of Papago Springs Cave, Arizona, with a study of Stockoceros. American Museum of Natural History, Bulletin 80:143-220.

Van Devender, T. R., A. M. Rea, and M. L. Smith. 1985. The Sangamon interglacial vertebrate fauna from Rancho La Brisca, Sonora, México. Transactions of the San Diego Society of Natural History 21(2):23-55.

Winans, M. C. 1985. Revision of North American fossil species of the genus Equus (Mammalia:Perissodactyla:Equidae). Dissertation, University of Texas at Austin, 264 pp.

Winans, M. C. 1989. A quantitative study of North American fossil species of the genus Equus. Pp. 262-297, in The evolution of perissodactyls (D. R. Prothero and R. M. Schoch, eds.), Clarendon Press/Oxford University Press, New York. 537 pp.


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