Turbinicarpus knuthianus (Boed.) V.John & Říha in Kaktusy (Brno) 19: 22. 1983
Turbinicarpus knuthianus in Kaktusy (Brno) 19: 22. 1983
is new combination for Echinocactus knuthianus in Monatsschr. Deutsch. Kakteen-Ges. 2: 139. 1930
Turbinicarpus knuthianus in Kaktusy (Brno) 19: 22. 1983