Echinomastus unguispinus subsp. laui (Gerhart Frank & Zecher) Glass, Guía Identific. Cact. Amenazadas México 1: Echinom/un ssp. laui. 1997 sec. Guzmán & al. 2003
- ≡Echinomastus laui Gerhart Frank & Zecher in Cact. Succ. J. (Los Angeles) 50: 188. 1978 syn. sec. Guzmán & al. 2003
- =Echinomastus unguispinus var. laui (Gerhart Frank & Zecher) Glass & R.A. Foster in Cact. Succ. J. (Los Angeles) 51: 124. 1979 syn. sec. Guzmán & al. 2003