Order Perissodactyla Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 629 636 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Equus asinus subsp. africanus Heuglin and Fitzinger 1866 Synonyms: Equus asinus subsp. africanus ( Fitzinger 1858 ) ; Equus asinus subsp. dianae (Dollman 1935) ; Equus asinus subsp. hippagrus Schomber 1963 ; Equus asinus subsp. nubianus Peel 1900 .