Echinocactus thionanthus Speg. in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 499. 1905

is basionym for Acanthocalycium thionanthum (Speg.) Backeb., Kaktus-ABC: 226. 1936 ["1935"]

is basionym for Lobivia thionanthus (Speg.) Britton & Rose, Cactaceae 3: 57–58, f. 74. 1922

is basionym for Echinopsis thionantha (Speg.) D.R.Hunt in Bradleya 5: 92. 1987

is basionym for Echinopsis thionantha (Speg.) Werderm. in Notizbl. Bot. Gart. Berlin-Dahlem 11: 264. 1931

is basionym for Lobivia thionantha (Speg.) Britton & Rose, Cactaceae 3: 57–58, f. 74. 1922

Type: not designated

Type: Protologue citation: [Argentina] Hab. in altiplanitie petrosa aridissima prope Cachi, Prov. Salta.

Taxon for this name