×Borkersia soniae Halda, Malina & Panar. in Acta Mus. Richnov., Sect. Nat., 10(2): 150. 2003 ×Borkersia soniae Halda, Malina & Panar. in Acta Mus. Richnov., Sect. Nat., 10(2): 150. 2003is basionym for ×Cleistocana soniae (Halda, Malina & Panar.) M.H.J.van der Meer in Cact. Phantast. 2019(3)-3: 27. 2019Taxon for this name×Borkersia soniae Halda, Malina & Panar.