A new name was necessary because the name Cleistocactus aureispinus Frič (1928) already existed. Nomenclature synonyms are Winterocereus aureispinus (F.Ritter) Backeb.
The need for a new name arises due to the existence of another species with the same name, *Cleistocactus aureispinus*. This situation highlights the importance of unique naming conventions in scientific classification.