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M. Dellacasa, R. D. Gordon, y G. Dellacasa, «Aphodius (Platyderides) pullatus A. Schmidt, 1913, another mexican taxon to be moved into the Genus Cephalocyclus and remarks on Cephalocyclus mexicanus (Harold, 1862) and Aphodius Frey! Balthasar, 1941. (Coleoptera Scarabaeoidea: Aphodiidae)», AZM, n.º 79, pp. 11–15, abr. 2000.