Echinofossulocactus caespitosus Backeb. in Cact. Succ. J. Gr. Brit. 12: 81. 1950 Echinofossulocactus caespitosus Backeb. in Cact. Succ. J. Gr. Brit. 12: 81. 1950Taxon for this nameEchinofossulocactus caespitosus Backeb.