Thelocactus bicolor subsp. flavidispinus (Backeb.) N.P.Taylor in Cactaceae Consensus Init. 5: 14. 1998 sec. Hunt 2016
- ≡Thelocactus bicolor var. flavidispinus Backeb. in Jahrb. Deutsch. Kakteen-Ges. 1: 6. 1941 syn. sec. ???
- ≡Thelocactus flavidispinus (Backeb.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 150. 1951 syn. sec. ???
- ≡Ferocactus bicolor var. flavidispinus (Backeb.) N.P.Taylor in Cact. Succ. J. Gr. Brit. 41: 30. 1979 syn. sec. ???