Gymnocalycium riojense subsp. paucispinum Backeb. ex H.Till & W.Till in Gymnocalycium 4: 55. 1991 Gymnocalycium riojense subsp. paucispinum Backeb. ex H.Till & W.Till in Gymnocalycium 4: 55. 1991Taxon for this nameGymnocalycium riojense subsp. paucispinum Backeb. ex H.Till & W.Till
