Synonyms
Gymnocalycium guanchinense Schütz
Gymnocalycium nidulans Backeb.
Gymnocalycium weissianum var. atroroseum Backeb.
Echinocactus hossei F.Haage
Gymnocalycium hossei var. nidulans (Backeb.) H.Till
Gymnocalycium rhodantherum var. cinerascens H.Till
Echinocactus mazanensis Backeb.
Gymnocalycium mazanense (Backeb.) Backeb.
Gymnocalycium weissianum Backeb.
Gymnocalycium hossei var. breviflorum (Backeb.) H.Till
Echinocactus mazanensis var. breviflorus Backeb.