Frailea pygmaea subsp. asperispina (F.Ritter) P.J.Braun & Esteves in Succulenta (Netherlands) 74: 131. 1995
Frailea pygmaea subsp. asperispina in Succulenta (Netherlands) 74: 131. 1995
is new combination for Frailea asperispina in Succulenta (Netherlands) 49: 124. 1970