Echinocactus fiebrigii Gürke in Notizbl. Königl. Bot. Gart. Berlin 4: 183. 1905
Echinocactus fiebrigii in Notizbl. Königl. Bot. Gart. Berlin 4: 183. 1905
is basionym for Rebutia fiebdgii, Stand. Cycl. Hort. 5: 2915. 1916
is basionym for Aylostera fiebrigii, Kaktus-ABC: 274. 1936 ["1935"]
is basionym for Rebutia fiebrigii in Cycl. Amer. Hort. 5: 2915. 1916
Neotype (designated by Hjertson, M. 2005: 201): [icon] illustration 'Echinocactus Fiebrigii Gürke' in Blühende Kakteen 2: t. 109. 1909 https://www.cactuspro.com/lecture/Schumann-Vaupel-Guerke/Bluhende-Kakteen-2/page-207.en.html