Mammillaria kleinii Regel, Index Seminum St. Petersburg (Petropolitanus) 1860: 47. 1860
Mammillaria kleinii, Index Seminum St. Petersburg (Petropolitanus) 1860: 47. 1860
is basionym for Cactus kleinii, Revis. Gen. Pl. 1: 260. 1891
Mammillaria kleinii, Index Seminum St. Petersburg (Petropolitanus) 1860: 47. 1860