Anhalonium retusum (Scheidw.) Salm-Dyck, Cact. Hort. Dyck., ed. 1844: 15. 1845 Anhalonium retusum (Scheidw.) Salm-Dyck, Cact. Hort. Dyck., ed. 1844: 15. 1845is new combination for Ariocarpus retusus Scheidw. in Bull. Acad. Roy. Sci. Bruxelles 5: 492, t. 1. 1838This name is not assigned to any taxon.