Thelocactus bicolor (Galeotti ex Pfeiff.) Britton & Rose subsp. bicolor in Bull. Torrey Bot. Club 49: 251. 1922 sec. Hunt 2016
- =Echinocactus bicolor var. pottsii Salm-Dyck, Cact. hort. dyck., ed. 3: 173. 1850 syn. sec. Guzmán & al. 2003
- =Echinocactus bicolor var. schottii Engelm. in Proc. Amer. Acad. Arts 3: 21. 1856 syn. sec. Guzmán & al. 2003
- =Echinocactus bicolor var. tricolor K. Schum., Gesamtbeschr. Kakt.: 303. 1898 syn. sec. Guzmán & al. 2003
- =Echinocactus wagnerianus A. Berger, Kakteen (Berger): 256. 1929 syn. sec. Guzmán & al. 2003
- =Thelocactus wagnerianus A. Berger, Kakteen (Berger): 346. 1929 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor var. tricolor (K. Schum.) F.M. Knuth, Kaktus-ABC: 358. 1936 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor var. pottsii (Salm-Dyck) Backeb., Cactaceae (Backeberg) 5: 2809. 1961 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor var. schottii (Engelm.) Krainz, Kakteen 18: C VIIIb. 1961 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor var. wagnerianus (A. Berger) Krainz, Kakteen 18: C VIIIb. 1961 syn. sec. Guzmán & al. 2003
- =Thelocactus schottii (Engelm.) Kladiwa & Fittkau, Kakteen 61: CVIIIb, 1975 syn. sec. Guzmán & al. 2003
- =Ferocactus bicolor (Galeotti ex Pfeiff.) N.P. Taylor in Cact. Succ. J. Gr. Brit. 41: 30. 1979 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor var. commodus R. Haas in Kakteen And. Sukk. 39: 87. 1988 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor subsp. commodus (R. Haas) Doweld in Sukkulenty 2: 30. 1999 syn. sec. Guzmán & al. 2003
- =Thelocactus bicolor subsp. zwakii Chvastek & Halda in Acta Mus. Richnov., Sect. Nat., 7: 38. 2000 syn. sec. Hunt 2013
- =Thelocactus bicolor subsp. swobodae Halda & Horácek in Acta Mus. Richnov., Sect. Nat., 9: 73. 2002 syn. sec. Hunt 2013