Synonyms: Echinocactus durangensis; Echinocactus unguispinus (homotypic); Echinomastus durangensis; Echinomastus hispidus; Echinomastus laui; Echinomastus mapimiensis; Echinomastus ungispinus var. crassihamatus; Echinomastus unguispinus (homotypic); Echinomastus unguispinus durangensis; Echinomastus unguispinus laui; Echinomastus unguispinus minimus; Echinomastus unguispinus unguispinus; Echinomastus unguispinus var. crassihamatus; Echinomastus unguispinus var. durangensis; Echinomastus unguispinus var. laui; Echinomastus unguispinus var. minimus; Echinomastus urguispinua; Echinomastus urguispinus; Neolloydia durangensis; Neolloydia unguispina (homotypic); Pediocactus unguispinus (heterotypic); Pediocactus unguispinus var. durangensis; Sclerocactus unguispinus var. durangensis; Thelocactus durangensis; Thelocactus unguispinus (homotypic)