Melocactus zehntneri subsp. arcuatispinus (Brederoo & Eerkens) P.J.Braun & Esteves in Schumannia 3: 188. 2002
Melocactus zehntneri subsp. arcuatispinus in Schumannia 3: 188. 2002
is new combination for Melocactus arcuatispinus in Succulenta (Netherlands) 62(5): 97. 1983