Ariocarpus retusus subsp. scapharostroides Halda & Horáček in Cactaceae etc. 7: 97. 1997 Ariocarpus retusus subsp. scapharostroides Halda & Horáček in Cactaceae etc. 7: 97. 1997Taxon for this nameAriocarpus retusus subsp. scapharostroides Halda & Horáček