Geohintonia mexicana Glass & Fitz 1991
Grusonia bradtiana (Coulter) Britton & Rose 1916
Gymnocalycium albiareolatum Rausch 1985
Gymnocalycium amerhauseri H. Till 1994
Gymnocalycium andreae (Boedeker) Backeberg 1936
Gymnocalycium anisitsii subsp. anisitsii (Karl Schumann) Britton & Rose 1922
Gymnocalycium anisitsii subsp. damsii (Karl Schumann) Charles 2005
Gymnocalycium baldianum (Spegazzini) Spegazzini 1925
Gymnocalycium bayrianum H. Till 1987
Gymnocalycium berchtii Neuhuber 1997
Gymnocalycium bodenbenderianum (Berger) Hill 1933
Gymnocalycium bruchii (Spegazzini) Hosseus 1926
Gymnocalycium calochlorum (Boedeker) Ito 1952
Gymnocalycium capillaense (Schick) Hosseus 1926
Gymnocalycium castellanosii subsp. castellanosii Backeberg 1936
G. castellanosii subsp. acorrugatum (Lambert) Kiessling & Metzing 2003
Gymnocalycium castellanosii subsp. ferocior (Till & Amerhauser) Charles 2005
Gymnocalycium chiquitanum Cárdenas 1963
Gymnocalycium denudatum (Link & Otto) Pfeiffer 1844
Gymnocalycium erinaceum (Lambert) 1985
Gymnocalycium eurypleurum (Ritter) 1979
Gymnocalycium gibbosum subsp. gibbosum (Haworth) Pfeiffer 1844
Gymnocalycium gibbosum subsp. borthii ([Kooper ex] Till) Charles 2005
Gymnocalycium glaucum subsp. glaucum Ritter 1963
Gymnocalycium glaucum subsp. ferrarii (Rausch) Charles 2005
Gymnocalycium horstii subsp. horstii Buining 1970
Gymnocalycium horstii subsp. buenekeri (Swal) Braun & Hofacker 2002
Gymnocalycium hossei (F. Haage) Hill 1933
Gymnocalycium kieslingii Ferrari 1985
Gymnocalycium kroenleinii Kiessling 2000
Gymnocalycium marsoneri subsp. marsoneri [Fric ex] Ito 1957
Gymnocalycium marsoneri subsp. matoense (Buining & Brederoo) Braun & Esteves 1995
Gymnocalycium mesopotamicum Kiessling 1980
Gymnocalycium mihanovichii (Fric & Guerke) Britton & Rose 1922
Gymnocalycium monvillei subsp. monvillei (Lemaire) Britton & Rose 1922
Gymnocalycium monvillei subsp. achirasense (Till) Till 1993
Gymnocalycium monvillei subsp. horridispinum (Till) Till 1993
Gymnocalycium mostii (Guerke) Britton & Rose 1918
Gymnocalycium neuhuberi (Till) Till 1992
Gymnocalycium nigriareolatum (Backeberg) 1934
Gymnocalycium ochoterenae (Backeberg) 1936
Gymnocalycium oenanthemum Backeberg [Augusztus] 1934
Gymnocalycium paraguayense (Karl Schumann) Hosseus 1939
Gymnocalycium pflanzii subsp. pflanzii (Vaupel) Werdermann 1935
Gymnocalycium pflanzii subsp. argentinense (Till) Till 1988
Gymnocalycium pflanzii subsp. zegarrae (Cárdenas) Charles 2005
Gymnocalycium pugionacanthum [Backeberg ex] Till 1987
Gymnocalycium ragonesei Castellanos 1950
Gymnocalycium reductum subsp. reductum (Link) [Pfeiffer ex] Mitt 1844
Gymnocalycium reductum subsp. leanum (Hooker) Papsch 2000
Gymnocalycium rhodantherum (Boedeker) Backeberg 1936
Gymnocalycium ritterianum Rausch 1972
Gymnocalycium robustum Kiessling 2002
Gymnocalycium saglionis (Cels) Britton & Rose 1922
G. schickendantzii subsp. schickendantzii (Weber) Britton & Rose 1922
Gymnocalycium schickendantzii subsp. delaetii (Karl Schumann) Charles 2005
Gymnocalycium schroederianum Osten 1941
Gymnocalycium spegazzinii subsp. spegazzinii Britton & Rose 1922
G. spegazzinii subsp. cardenasianum (Ritter) Kiessling & Metzing 1996
Gymnocalycium stellatum (Spegazzini) 1925
Gymnocalycium stenopleurum (Ritter) 1979
Gymnocalycium striglianum [Jeggle ex] Till 1987
Gymnocalycium taningaense Piltz 1990
Gymnocalycium uebelmannianum Rausch 1972
Gymnocalycium uruguayense (Arechavaleta) Britton & Rose 1922
