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Dellacasa, M. et al. 2007. Systematic revision of the genus Cephalocyclus with description of ten new species from Mexico and Costa Rica (Scarabaeoidea: Aphodiidae). ACTA ZOOLÓGICA MEXICANA (N.S.). 23, 2 (ago. 2007), 89–128. DOI:https://doi.org/10.21829/azm.2007.232571.