Hamatocactus bicolor (Teran & Berland.) I.M. Johnston, Contributions from the Gray Herbarium of Harvard University 70: 87, 1924
Hamatocactus crassihamatus (A. Weber) F. Buxbaum, Osterr. Bot. Zeitschr. 98. 60, 1951Hamatocactus hamatacanthus (Muehlenpf.) F. M. Knuth in Backeberg & F. M. Knuth, Kaktus-ABC 353., 1935
Hamatocactus hamatacanthus v. davisii (Houghton) Marshall in Marshall & T. M. Bock, Cactaceae (Berlin) 145, 1941Hamatocactus hamatacanthus v. papyracanthus
Hamatocactus hamatocanthus (Houghton) W.T. MarshallHamatocactus hamatocanthus v. davisii (Houghton) Marshall in Marshall & T. M. Bock, Cactaceae (Berlin) 145. as hamatacanthus, 1941
Hamatocactus longihamatusHamatocactus longihamatus v. crassispinus Engelmann
Hamatocactus mathssoniiHamatocactus setispinus (Engelmann) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 104-106, f. 110, 111, 112, 113, 114, 1922
Hamatocactus setispinus f. cachetianus (Monv) Backeberg et Knuth, Kakteen (H. Krainz) Lief. 31-32: C VIIIb., 1965Hamatocactus setispinus f. flavibaccatus G. Unger, Kakteen und Andere Sukkulenten 32: 290-291, 1981
Hamatocactus setispinus f. orcuttii (K. Schumann) Krainz, Kakteen (H. Krainz) Lief. 31-32: C VIIIb., 1965Hamatocactus setispinus v. hamatus
Hamatocactus setispinus v. longispinus MillerHamatocactus setispinus v. marisianus Gelotti
Hamatocactus setispinus v. mertellii Gerde FrerHamatocactus setispinus v. setaceus
Hamatocactus sinuatus (A. Dietrich) Orcutt, Cactography, 6., 1926Hamatocactus sinuatus v. papyracanthus
Hamatocactus uncinatus (Gal) F. Buxbaum, Cactography, 6, 1926Hamatocactus uncinatus ssp. crassihamatus (F.A.C. Weber) C.E. Glass, Guía Identific. Cact. Amenazadas México, 1: (1998 publ.): 1997
Hamatocactus uncinatus v. wrightii (Engelmann) F. Buxbaum, Cact. Suc. Mex., 25 (3): 65: 1980Hamatocactus wrightii Orcutt, Cactography, 6, 1926
