Rossini, M., Vaz-de-Mello, F.Z. and Zunino, M. 2018. Toward a comprehensive taxonomic revision of the “hirculus” group of American Onthophagus Latreille, 1802 (Coleoptera, Scarabaeidae, Scarabaeinae). European Journal of Taxonomy. 432 (May 2018). DOI:https://doi.org/10.5852/ejt.2018.432.