Gymnocalycium marsoneri subsp. matoense
Gymnocalycium marsoneri subsp. matoense in Succulenta (Netherlands) 74(3): 131. 1995 sec. Kiesling & al. 20141
- =Gymnocalycium onychacanthum, Explan. Diagr. Austroechinocactinae: 292. 1957 syn. sec. Kiesling & al. 20142
- =Gymnocalycium hamatum in Itô, Cactaceae: 385. 1981 syn. sec. Kiesling & al. 20143
- =Gymnocalycium megatae subsp. zecheri in Gymnocalycium 23: 965. 2010 syn. sec. Kew WCVP (2019)4
- =Gymnocalycium megatae var. che-guevarae in Cactaceae etc. 26: 116. 2016 syn. sec. Kew WCVP (2019)5