Pyrrhocactus crispus F.Ritter in Succulenta (Netherlands) 1959: 137. 1959
Pyrrhocactus crispus in Succulenta (Netherlands) 1959: 137. 1959
is basionym for Eriosyce crispa, Eriosyce (Cactac.) Gen. Revis. Ampl.: 118. 1994
is basionym for Neoporteria crispa in Cact. Succ. J. Gr. Brit. 28: 55. 1966
is basionym for Horridocactus crispus, Cactaceae 6: 3795. 1962
is basionym for Neoporteria vallenarensis var. crispa, Cact. Fl. Silvestre Chile: 218. 1989