Gymnocalycium megalothelon (Sencke ex K.Schum.) Britton & Rose, Cactaceae 3: 162. 1922
Gymnocalycium megalothelon, Cactaceae 3: 162. 1922
is new combination for Echinocactus megalothelon, Gesamtbeschr. Kakt.: 415. 1897–1899
Gymnocalycium megalothelon, Cactaceae 3: 162. 1922
Taxon for this name