From Bogdanova & Hoedemaeker, 2004: Wright et al. (1996) considered Juandurhamiceras Etayo Serna, 1979, to be a junior synonym of Dufrenoyia. However, it clearly differs morphologically from Dufrenoyia, as do Neodeshayesites and Burckhardtites, and we regard them as independent genera.
Bogdanova, T. N.; Hoedemaeker, P. J. (2004). Barremian-Early Albian Deshayesitidae, Oppeliidae, Desmoceratidae and Silesitidae of Colombia. <em>Scripta Geologica.</em> 128: 183-312.