Mammillaria sinistrohamata Boed. Mammillaria sinistrohamata Boed. in Monatsschr. Deutsch. Kakteen-Ges. 4: 162. 1932 sec. Hunt 2016=Escobariopsis sinistrohamata (Boed.) Doweld in Sukkulenty 3: 41. 2000 syn. sec. Guzmán & al. 2003