Obregonia denegrii Fric in Život v Prír. 29: 14. 1925 sec. Hunt 2016
- =Ariocarpus denegrii (Fric) W.T. Marshall in Cact. Succ. J. (Los Angeles) 18: 56. 1946 syn. sec. Guzmán & al. 2003
- =Strombocactus denegrii (Fric) G.D. Rowley in Repert. Pl. Succ. 23: 9. 1974 syn. sec. Guzmán & al. 2003