Turbinicarpus saueri subsp. ysabelae (Schlange) Lüthy in Kakteen And. Sukk. 50(11): 280. 1999
Turbinicarpus saueri subsp. ysabelae in Kakteen And. Sukk. 50(11): 280. 1999
is new combination for Thelocactus ysabelae in Cact. Succ. J. (Los Angeles) 5: 551. 1934