Synonyms: Cactus crinitus (homotypic); Cactus schelhasii; Chilita criniformis; Chilita crinita (homotypic); Chilita pubispina; Chilita pygmaea; Chilita schelhasii; Chilita trichacantha; Ebnerella crinita (homotypic); Ebnerella pubispina; Ebnerella pygmaea; Ebnerella schelhasii; Ebnerella trichacantha; Krainzia crinita (homotypic); Mammillaria cadereytana; Mammillaria criniformis; Mammillaria criniformis var. albida; Mammillaria crinita scheinvariana (homotypic); Mammillaria mollihamata; Mammillaria pubispina; Mammillaria pygmaea; Mammillaria scheinvariana; Mammillaria schelhasii; Mammillaria trichacantha; Neomammillaria aurihamata; Neomammillaria pygmaea; Neomammillaria schelhasii; Neomammillaria trichacantha