Lepidocoryphantha macromeris (Engelm.) Backeb. Lepidocoryphantha macromeris (Engelm.) Backeb. in Jahrb. Deutsch. Kakteen-Ges. 1941(pt. 2): 61. 1942. sec. Backeberg 1961≡Mammillaria macromeris Engelm., Memoir Tour N. Mexico [Wislizenus]: 97. 1848 syn. sec. Backeberg 1961