| Arten: |
| Gymnocalycium albiareolatum Rausch |
| Gymnocalycium ambatoense Piltz |
| Gymnocalycium amerhauseri H.Till |
| Gymnocalycium andreae (Boed.) Backeb. |
| Gymnocalycium andreae subsp. andreae |
| Gymnocalycium andreae subsp. carolinense G.J.A.Neuhuber |
| Gymnocalycium angelae Meregalli |
| Gymnocalycium anisitsii (K.Schum.) Britton & Rose |
| Gymnocalycium anisitsii subsp. anisitsii |
| Gymnocalycium anisitsii subsp. multiproliferum (P.J.Braun) P.J.Braun & Esteves |
| Gymnocalycium baldianum (Speg.) Speg. |
| Gymnocalycium bayrianum H.Till |
| Gymnocalycium berchtii G.J.A.Neuhuber |
| Gymnocalycium bodenbenderianum (Hosseus ex A.Berger) A.W.Hill |
| Gymnocalycium bodenbenderianum subsp. intertextum (Backeb. ex H.Till) H.Till |
| Gymnocalycium borthii Koop ex H.Till |
| Gymnocalycium bruchii (Speg.) Hosseus |
| Gymnocalycium buenekeri Sw. |
| Gymnocalycium calochlorum (Boed.) Y.Itô |
| Gymnocalycium capillaense (Schick) Hosseus |
| Gymnocalycium carminanthum Borth & Koop |
| Gymnocalycium castellanosii Backeb. |
| Gymnocalycium catamarcense H.Till & W.Till |
| Gymnocalycium catamarcense subsp. acinacispinum H.Till & W.Till |
| Gymnocalycium catamarcense subsp. schmidianum H.Till & W.Till |
| Gymnocalycium chiquitanum Cardenas |
| Gymnocalycium deeszianum Dölz |
| Gymnocalycium delaetii (K.Schum.) Hosseus |
| Gymnocalycium denudatum (Link & Otto) Pfeiff. ex Mittler |
| Gymnocalycium erinaceum J.G.Lambert |
| Gymnocalycium eurypleurum F.Ritter |
| Gymnocalycium eytianum Cardenas |
| Gymnocalycium gibbosum (Haw.) Pfeiff. ex Mittler |
| Gymnocalycium gibbosum subsp. ferox (Labour. ex Rümpler) Papsch |
| Gymnocalycium horstii Buining |
| Gymnocalycium hossei (F.Haage) A.W.Hill |
| Gymnocalycium hybopleurum (K.Schum.) Backeb. |
| Gymnocalycium hyptiacanthum (Lem.) Britton & Rose |
| Gymnocalycium kieslingii O.Ferrari |
| Gymnocalycium leeanum (Hook.) Britton & Rose |
| Gymnocalycium leptanthum (Speg.) Speg. |
| Gymnocalycium mackieanum (Hook.) Metzing, Meregalli & R.Kiesling |
| Gymnocalycium marsoneri Fric ex Y.Itô |
| Gymnocalycium marsoneri subsp. marsoneri |
| Gymnocalycium marsoneri subsp. matoense (Buining & Brederoo) P.J.Braun & Esteves |
| Gymnocalycium megalothelos (Sencke ex K.Schum.) Britton & Rose |
| Gymnocalycium mesopotamicum R.Kiesling |
| Gymnocalycium mihanovichii (Fric ex Gürke) Britton & Rose |
| Gymnocalycium monvillei (Lem.) Britton & Rose |
| Gymnocalycium monvillei subsp. achirasense (H.Till & Schatzl ex H.Till) H.Till |
| Gymnocalycium monvillei subsp. brachyanthum (Gürke) H.Till |
| Gymnocalycium monvillei subsp. horridispinum (G.Frank ex H.Till) H.Till |
| Gymnocalycium monvillei subsp. monvillei |
| Gymnocalycium mostii (Gürke) Britton & Rose |
| Gymnocalycium mucidum Oehme |
| Gymnocalycium netrelianum (Monv.) Britton & Rose |
| Gymnocalycium neuhuberi H.Till & W.Till |
| Gymnocalycium obductum Piltz |
| Gymnocalycium ochoterenae Backeb. |
| Gymnocalycium ochoterenae subsp. herbsthoferianum H.Till & Neuhuber |
| Gymnocalycium ochoterenae subsp. vatteri (Buining) Papsch |
| Gymnocalycium paediophilum F.Ritter ex Schütz |
| Gymnocalycium paraguayense (K.Schum.) Hosseus |
| Gymnocalycium parvulum (Speg.) Speg. |
| Gymnocalycium pflanzii (Vaupel) Werderm. |
| Gymnocalycium pflanzii subsp. argentinense H.Till & W.Till |
| Gymnocalycium pflanzii subsp. dorisiae Amerhauser |
| Gymnocalycium pflanzii subsp. pflanzii |
| Gymnocalycium platense (Speg.) Britton & Rose |
| Gymnocalycium quehlianum (F.Haage ex Quehl) Vaupel ex Hosseus |
| Gymnocalycium ragonesii A.Cast. |
| Gymnocalycium rauschii H.Till & W.Till |
| Gymnocalycium riojense Fric ex H.Till & W.Till |
| Gymnocalycium riojense subsp. kozelskyanum H.Till & W.Till |
| Gymnocalycium riojense subsp. paucispinum H.Till & W.Till |
| Gymnocalycium riojense subsp. piltziorum (Schütz) H.Till & W.Till |
| Gymnocalycium riojense subsp. platygonum H.Till & W.Till |
| Gymnocalycium ritterianum Rausch |
| Gymnocalycium rosae H.Till |
| Gymnocalycium saglionis (Cels) Britton & Rose |
| Gymnocalycium saglionis subsp. saglionis |
| Gymnocalycium saglionis subsp. tilcarense (Backeb.) H.Till & W.Till |
| Gymnocalycium schickendantzii (F.A.C.Weber) Britton & Rose |
| Gymnocalycium schroederianum Osten |
| Gymnocalycium schroederianum subsp. bayense R.Kiesling |
| Gymnocalycium schroederianum subsp. paucicostatum R.Kiesling |
| Gymnocalycium schroederianum subsp. schroederianum |
| Gymnocalycium spegazzinii Britton & Rose |
| Gymnocalycium spegazzinii subsp. cardenasianum (F.Ritter) Kiesling & Metzing |
| Gymnocalycium stellatum Speg. |
| Gymnocalycium stellatum subsp. occultum (Fric ex Schütz) H.Till & W.Till |
| Gymnocalycium stellatum subsp. stellatum |
| Gymnocalycium stenopleurum F.Ritter |
| Gymnocalycium striglianum Jeggle ex H.Till |
| Gymnocalycium taningaense Piltz |
| Gymnocalycium terweemeanum (Teucq ex Duursma) Borgmann & Piltz |
| Gymnocalycium tillianum Rausch |
| Gymnocalycium uebelmannianum Rausch |
| Gymnocalycium uruguayense (Arechav.) Britton & Rose |