Mammillaria pseudopectinata (Backeb.) H.P.Kelsey & Dayton, Standard. Pl. Names, ed. 2: 74. 1942 Mammillaria pseudopectinata (Backeb.) H.P.Kelsey & Dayton, Standard. Pl. Names, ed. 2: 74. 1942is new combination for Pelecyphora pseudopectinata Backeb. in Kakteenkunde 5: 98. 1935Taxon for this nameMammillaria pseudopectinata (Backeb.) H.P.Kelsey & Dayton