Ferocactus hamatacanthus (Muehlenpf.) Britton & Rose subsp. hamatacanthus, Cactaceae (Britton & Rose) 3: 144. 1922 sec. Hunt 2016
- =Echinocactus longihamatus Galeotti ex Pfeiff. in Abbild. Beschr. Cact. 2: t. 16. 1848 syn. sec. Guzmán & al. 2003
- =Echinocactus longihamatus var. brevispinus Engelm. in Proc. Amer. Acad. Arts 3: 18. 1856 syn. sec. Guzmán & al. 2003
- =Echinocactus longihamatus var. crassispinus Engelm. in Proc. Amer. Acad. Arts 3: 17. 1856 syn. sec. Guzmán & al. 2003
- =Echinocactus longihamatus var. gracilispinus Engelm. in Proc. Amer. Acad. Arts 3: 17. 1856 syn. sec. Guzmán & al. 2003
- =Bisnaga hamatacantha (Muehlenpf.) Orcutt, Cactography 1. 1926 syn. sec. Guzmán & al. 2003
- =Hamatocactus hamatacanthus (Muehlenpf.) F.M. Knuth, Kaktus-ABC: 353. 1936 syn. sec. Guzmán & al. 2003
- =Hamatocactus hamatacanthus var. papyracanthus F.M. Knuth, Kaktus-ABC: 353. 1936 syn. sec. Guzmán & al. 2003
- =Hamatocactus hamatacanthus var. brevispinus (Engelm.) Borg, Cacti (Borg): 219. 1937 syn. sec. ???
- =Hamatocactus hamatacanthus var. crassispinus (Engelm.) W.T. Marshall in Cact. Succ. J. (Los Angeles) 16: 80. 1944 syn. sec. Guzmán & al. 2003
- =Hamatocactus hamatacanthus var. gracilispinus (Engelm.) W.T. Marshall in Cact. Succ. J. (Los Angeles) 16: 80. 1944 syn. sec. Guzmán & al. 2003
- =Ferocactus hamatacanthus var. crassispinus (Engelm.) L.D. Benson in Cact. Succ. J. (Los Angeles) 46: 80. 1974 syn. sec. Guzmán & al. 2003