| Résumé: | The genus Cephalocyclus Dellacasa M., Gordon & Dellacasa G. is revised for the first time. Ten new species are described: Cephalocyclus bordati, C. carmenae, C. cartagoensis, C. costaricensis, C. halffteri, C. howdenorum, C. lagoi, C. ordonezi, C. potosinus, and C. rockefelleri. Aphodius luteolus Horn, 1887 is transferred into genus Cephalocyclus; Aphodius pugil Balthasar, 1946 resulted a junior synonym of Cephalocyclus durangoensis (Bates, 1887) and Aphodius transversus Robinson, 1940 resulted a junior synonym of Cephalocyclus hogei (Bates, 1887). A key to the presently known 21 species of Cephalocyclus as well as descriptions and illustrations of all taxa are supplied.
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