Ferocactus macrodiscus (Mart.) Britton & Rose subsp. macrodiscus Ferocactus macrodiscus (Mart.) Britton & Rose subsp. macrodiscus, Cactaceae (Britton & Rose) 3: 139. 1922 sec. Hunt 2016=Bisnaga macrodisca (Mart.) Doweld in Sukkulenty 1: 29. 1999 syn. sec. Guzmán & al. 2003