| classification of the genus according to H. Till \ Series j Schickendantziana |
Hilum about as long as the seed's diameter, graded
Typus: Gymnocalycium schickendantzii
| Species / variety | place of finding |
| G. bergeri | Argentina, Prov. Salta |
| G. delaetii | Argentina, Prov. Tucuman, Salta |
| G. hamatum | Bolivia, Dept. Tarija |
| G. marsoneri | Argentina, Prov. Salta, Tucuman |
| G. schickendantzii | Argentina, Prov.La Rioja, San Luis, Salta, San Juan, Tucuman, Catamarga |
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| Gymnocalycium schickendantzii |
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