Ariocarpus scaphirostris Boed. Ariocarpus scaphirostris Boed. in Monatsschr. Deutsch. Kakteen-Ges. 2: 60. 1930 sec. Hunt 2016=Ariocarpus scaphirostris var. swobodae Halda, Horácek & Panar. in Acta Mus. Richnov., Sect. Nat., 5: 163. 1998 syn. sec. Guzmán & al. 2003