Micranthocereus polyanthus (Werderm.) Backeb. in Cactaceae (Berlin) 1941(2): 51. 1942 sec. Zappi & Taylor 2020
- ≡Cephalocereus polyanthus Werderm., Repert. Spec. Nov. Regni Veg.: 11. 1932 syn. sec. ???
- ≡Arrojadoa polyantha (Werderm.) D.R.Hunt in Bradleya 5: 92. 1987 syn. sec. ???
- ≡Micranthocereus polyanthus subsp. polyanthus syn. sec. ???