Mammillaria formosa subsp. pseudocrucigera (R.T. Craig) D.R. Hunt Mammillaria formosa subsp. pseudocrucigera (R.T. Craig) D.R. Hunt, Mammillaria Postscripts 6: 10. 1997 sec. Hunt 2016=Mammillaria pseudocrucigera R.T. Craig, Mammillaria Handb.: 101. 1945 syn. sec. Hunt 2016