Sulcorebutia azurduyensis var. sormae (Heřtus, Horáček & Slaba) Gertel & Jucker in Succulenta (Netherlands) 91(3): 12
Sulcorebutia azurduyensis var. sormae in Succulenta (Netherlands) 91(3): 120. 2012
is new combination for Sulcorebutia sormae in Kaktusy (Brno) 47: 31. 2011