Pyrrhocactus pygmaeus F.Ritter in Taxon 12: 32. 1963
Pyrrhocactus pygmaeus in Taxon 12: 32. 1963
is basionym for Eriosyce taltalensis subsp. pygmaea, Cact. Fl. Silv. Chile, ed. 2: 240. 2004
is basionym for Neoporteria intermedia f. pygmaea, Cact. Fl. Silvestre Chile: 194. 1989
is basionym for Neoporteria pilispina f. pygmaea in Cact. Succ. J. Gr. Brit. 28: 57. 1966
is basionym for Eriosyce taltalensis var. pygmaea, Eriosyce (Cactac.) Gen. Revis. Ampl.: 119. 1994
is basionym for Eriosyce pygmaea in Cactaceae Syst. Init. 16: 11. 2003
is basionym for Neochilenia pygmaea, Descr. Cact. Nov. 3: 9. 1963
Type: Chile, Atacama, 20 km N of Chañaral, on the coast, F. Ritter FR 519 (U: 117858B)