Gymnocalycium ochoterenai Backeb., 1936 species accepted

Gymnocalycium capillense (Schick) Hosseus species accepted

Echinocactus gibbosus var. typica Speg. variety synonym

Echinocactus capillensis Schick species synonym

Gymnocalycium ×pazoutianum Halda species accepted

Gymnocalycium ottonis Hosseus species doubtful

Gymnocalycium ×heidiae Neuhuber species doubtful

Gymnocalycium gerardii (Böd) Y.Itô species synonym

Gymnocalycium chacoense Amerh. species accepted

Gymnocalycium capillensis (Schick) Hosseus species synonym

Gymnocalycium ×contractum (Hildm.) M.H.J.van der Meer species accepted

Echinocactus gibbosus var. cerebriformis Macloskie variety synonym

Gymnocalycium gibbosum (Haw.) Pfeiff. ex Mittler species doubtful

Echinocactus ×contractus Hildm. species synonym

Gymnocalycium monvillei Pfeiff. ex K.Schum., 1898 species doubtful