Notocactus arnostianus Lisal & Kolarik in Internoto 7(1): 8. 1986
Notocactus arnostianus in Internoto 7(1): 8. 1986
is basionym for Parodia arnostiana in Cactaceae Consensus Init. 6: 11. 1998
is basionym for Ritterocactus arnostianus in Sukkulenty 2(2): 22. 1999