Echinofossulocactus pentacanthus (Lem.) Britton & Rose, Cactaceae 3: 115. 1922 Echinofossulocactus pentacanthus (Lem.) Britton & Rose, Cactaceae 3: 115. 1922is new combination for Echinocactus pentacanthus Lem., Cact. Aliq. Nov.: 27. 1838Taxon for this nameEchinofossulocactus pentacanthus (Lem.) Britton & Rose