Pyrrhocactus echinus var. minor F.Ritter in Taxon 12: 33. 1963
Pyrrhocactus echinus var. minor in Taxon 12: 33. 1963
is basionym for Neoporteria curvispina f. minor in Cact. Succ. J. Gr. Brit. 28: 55. 1966
is basionym for Horridocactus echinus var. minor, Kakteenlex.: 190. 1966
is basionym for Pyrrhocactus floccosus var. minor, Kakteen Südamerika 3: 939. 1980