Mammillaria herrerae Werderm. Mammillaria herrerae Werderm. in Notizbl. Bot. Gart. Berlin-Dahlem 11: 276. 1931 sec. Hunt 2016=Escobariopsis herrerae (Werderm.) Doweld in Sukkulenty 3: 40. 2000 syn. sec. Guzmán & al. 2003