Mammillaria polythele var. quadrispina (Mart.) Salm-Dyck in Repert. Bot. Syst. 2: 271. 1843
Mammillaria polythele var. quadrispina in Repert. Bot. Syst. 2: 271. 1843
is new combination for Mammillaria quadrispina in Nov. Actorum Acad. Caes. Leop.-Carol. Nat. Cur. 16(1): 329. 1832