Ariocarpus scaphirostris Mexico, Nuevo Leon, near Monterrey, 1928, F. Ritter s.n. (not preserved) Lectotype: [icon] the figure in Boedecker in Monatsschr. Deutsch. Kakteen-Ges. 2(3-4): 61.1930 Neotype: Mexico, Nuevo Leon, 'mountains in west-central Nuevo Leon', 17 Jan 1961, E. F. Anderson 1695 (POM: 298104)