Echinopsis pygmaea R.E.Fr. in Nova Acta Regiae Soc. Sci. Upsal. ser. 4, 1(1): 120. 1905
Echinopsis pygmaea in Nova Acta Regiae Soc. Sci. Upsal. ser. 4, 1(1): 120. 1905
is basionym for Aylostera pygmaea in Pakistan J. Bot. 43: 2769–2785. 2011
is basionym for Rebutia pygmaea, Cactaceae 3: 47, fig. 60. 1922
is basionym for Mediolobivia pygmaea in Sukkulentenkunde 1: 19. 1947
is basionym for Lobivia pygmaea, Kaktus-ABC: 241. 1936 ["1935"]
Lectotype (designated by Hjertson, M.L. 1994: 4561): Argentina, Prov. Jujuy, Yavi, alt. 3400 m, 1 Jan 1902, Fries 999 (S)