A phenetic analysis of the genus Thelocactus is presented. The collected data, 65, and the 34 Operational Taxonomic Units used for the study were processed by a principal components analysis method. The ordinations made lead us to conclude that Hamatocactus setispinus is not congeneric with Thelocactus from which it has to be separated. Some nomenclatural changes are also made in order to adjust the taxonomy of the genus to the results obtained.
ACCESS THE FULL ARTICLE