Gymnocalycium schickendantzii subsp. schickendantzii sec. Charles 2009
- =Echinocactus stuckertii Speg. in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 502. 1905 syn. sec. Charles 2009
- ≡Gymnocalycium stuckertii (Speg.) Britton & Rose, Cactaceae 3: 165. 1922 syn. sec. Hunt 2016
- =Gymnocalycium michoga Y.Itô, Explan. Diagr. Austroechinocactinae: 292. 1957 syn. sec. Charles 2009
- =Gymnocalycium schickendantzii subsp. bergeri Neuhuber in Gymnocalycium 14: 420. 2001 syn. sec. Metzing 2021
- =Gymnocalycium schickendantzii subsp. periferalium Neuhuber in Gymnocalycium 17: 564. 2004 syn. sec. Charles 2009
- =Gymnocalycium schickendantzii var. pectinatum Neuhuber in Gymnocalycium 17: 565. 2004 syn. sec. Metzing 2021
- =Gymnocalycium pungens Fleischer ex Milt in Cactaceae etc. 30: 98-99. 2020 syn. sec. Metzing 2021
- –Gymnocalycium pungens Fleisch. in Friciana 1(7): 1. 1962, nom. inval., syn. sec. Metzing 2021