Pyrrhocactus echinus F.Ritter in Taxon 12: 33. 1963
Pyrrhocactus echinus in Taxon 12: 33. 1963
is basionym for Eriosyce paucicostata subsp. echinus, Cact. Fl. Silv. Chile, ed. 2: 232. 2004
is basionym for Eriosyce taltalensis subsp. echinus, Eriosyce (Cactac.) Gen. Revis. Ampl.: 119. 1994
is basionym for Horridocactus echinus, Descr. Cact. Nov. 3: 7. 1963
is basionym for Horridocactus paucicostatus subsp. echinus in Cactology 3: 8. 2012
is basionym for Neoporteria echinus, Cacti Illustr. Dict.: 142. 1991
is basionym for Neoporteria paucicostata var. echinus, Cact. Fl. Silvestre Chile: 208. 1989
is basionym for Eriosyce taltalensis var. echinus, Eriosyce (Cactac.) Gen. Revis. Ampl.: 119. 1994
is basionym for Neoporteria curvispina var. echinus in Cact. Succ. J. Gr. Brit. 28: 55. 1966
Isotype: Chile, near Antofagasta, Cerro Coloso, F. Ritter FR 537 (SGO)
Holotype: Chile, near Antofagasta, Cerro Coloso, F. Ritter FR 537 (ZSS)