Sulcorebutia tiraquensis var. australis (Rausch) Gertel & J.de Vries in Cactus & Co. 11(3): 158. 2007
Sulcorebutia tiraquensis var. australis in Cactus & Co. 11(3): 158. 2007
is new combination for Sulcorebutia steinbachii var. australis in Succulenta (Netherlands) 65(11): 240. 1986