Alternative combinations: Astrohippus martini, Calippus (Grammohippus) martini, Pliohippus (Astrohippus) martini, Pliohippus martini, Protohippus martini
Synonym: Equus laparensis Quinn 1955
Full reference: C. J. Hesse. 1936. Lower Pliocene Vertebrate Fossils from the Ogallala Formation (Lavern Zone) of Beaver County, Oklahoma. Carnegie Institution of Washington Publication 476(1):47-72
See also Dalquest et al. 1996, Forsten 1975, Green 1956, Hesse 1936, Hulbert 1988, Johnston 1937, Kelly 1998, Macdonald 1960, MacFadden 1998, Prado and Alberdi 1996, Quinn 1955, Schultz 1977, Stirton 1940 and Webb 1969
Sister taxa: none
- Calippus martini: UCMP 32814, a maxilla (Upper left dentition P2-M3,). Its type locality is Beaver Quarry, which is in a Clarendonian terrestrial horizon in Oklahoma.
- Equus laparensis: BEG 30896-195, a set of teeth (upper left premolar series). Its type locality is Buckner Ranch Locality, Site 1, which is in a Clarendonian terrestrial horizon in the Goliad Formation of Texas.
Ecology: ground dwelling grazer
Total: 34 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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