Thelocactus conothelos (Regel & Klein) F.M. Knuth subsp. conothelos, Kaktus-ABC: 358. 1936 sec. Hunt 2016
- =Echinocactus smithii Muehlenpf. in Allg. Gartenzeitung 14: 370. 1846 syn. sec. Guzmán & al. 2003
- =Echinocactus saussieri F.A.C. Weber, Dict. horticult. 1: 468. 1896 syn. sec. Guzmán & al. 2003
- =Thelocactus saussieri (F.A.C. Weber) A. Berger, Kakteen (Berger): 346. 1929 syn. sec. Guzmán & al. 2003
- =Thelocactus smithii (Muehlenpf.) Borg, Cacti (Borg), ed. 2: 346. 1951 syn. sec. Guzmán & al. 2003
- =Gymnocactus beguinii var. smithii (Muehlenpf.) Backeb., Cactaceae (Backeberg) 5: 2855. 1961 syn. sec. Guzmán & al. 2003
- =Gymnocactus conothelos (Regel & Klein) Backeb., Cactaceae (Backeberg) 5: 2859. 1961 syn. sec. Guzmán & al. 2003
- =Gymnocactus saussieri (F.A.C. Weber) Backeb., Cactaceae (Backeberg) 5: 2860. 1961 syn. sec. Guzmán & al. 2003
- =Neolloydia smithii (Muehlenpf.) Kladiwa & Fittkau, Kakteen 46-47:C VIIIb, 1. 6. 1971 syn. sec. Guzmán & al. 2003
- =Pediocactus smithii (Muehlenpf.) Halda in Acta Mus. Richnov., Sect. Nat., 5: 19. 1998 syn. sec. Guzmán & al. 2003
- =Torreycactus conothelos (Regel & Klein) Doweld in Sukkulenty 1: 19. 1998 syn. sec. Guzmán & al. 2003