Epithelantha pachyrhiza subsp. parvula D.Donati & Zanov. in Piante Grasse 30: 185. 2010
Epithelantha pachyrhiza subsp. parvula in Piante Grasse 30: 185. 2010
Holotype: Mexico, Coahuila: Hipolito, 20 Oct 2010, G.S. Hinton & D. Donati 29211 (GBH: 029211)