Echinomastus unguispinus subsp. laui (G.Frank & Zecher) Glass, Guía Identific. Cact. Amenazadas México: Echinom/un ssp. la
Echinomastus unguispinus subsp. laui, Guía Identific. Cact. Amenazadas México: Echinom/un ssp. laui. 1997 ["1998"]
is new combination for Echinomastus laui in Cact. Succ. J. (Los Angeles) 50: 188. 1978