Mammillaria atrata Hook. in Curtis's Bot. Mag. 65: pl. 3642. 1839 Mammillaria atrata Hook. in Curtis's Bot. Mag. 65: pl. 3642. 1839is basionym for Cactus atratus (Hook.) Kuntze, Revis. Gen. Pl. 1: 259. 1891Taxon for this name? Mammillaria atrata Hook.