Malacocarpus stegmannii Backeb., Cactaceae 3: 1623. 1959
Malacocarpus stegmannii, Cactaceae 3: 1623. 1959
is basionym for Wigginsia stegmannii in Taxon 13(6): 211. 1964
is basionym for Notocactus sessiliflorus var. stegmannii in Kaktusy (Brno) 15: 103. 1979
is basionym for Notocactus stegmannii in Kakteen And. Sukk. 17: 195. 1966