†Protohippus (Calippus) Matthew and Stirton 1930 (horse)
Mammalia - Perissodactyla - Equidae
Full reference: W. D. Matthew and R. A. Stirton. 1930. Equidae from the Pliocene of Texas. University of California Publications, Bulletin of the Department of Geological Sciences 19(17):349-396
Parent taxon: Protohippus according to W. D. Matthew and R. A. Stirton 1930
See also Carroll 1988, Forsten 1975, Hulbert 1988, Johnston 1937, Kelly 1995, MacFadden 1998, May 2019, Prado and Alberdi 1996, Prothero and Schoch 1989, Quinn 1955 and Stirton 1940
Sister taxa: none
Subtaxa: none
Ecology: ground dwelling grazer-browser
Distribution: there are no occurrences of Protohippus (Calippus) in the database