Notocactus linkii var. flavispinus Buining & Brederoo in Kakteen And. Sukk. 29: 27. 1978
Notocactus linkii var. flavispinus in Kakteen And. Sukk. 29: 27. 1978
is basionym for Notocactus megapotamicus var. flavispinus in Kakteen And. Sukk. 43(1): 21. 1992