Da Costa-Silva, ViniciusStrumpher, Werner P.Barclay, Maxwell V.L.Vaz-de-Mello, Fernando Z.2024-12-132024-12-132024Da Costa-Silva, V., Strümpher, W.P., Barclay, M.V.L. & Vaz-de-Mello, F.Z. (2024) An illustrated catalogue of South American species of Omorgus Erichson, 1847 (Coleoptera, Trogidae, Omorginae) including a neotype designation and taxonomical changes. Contributions to Entomology 74(1): 81-101. https://doi.org/10.3897/contrib.entomol.74.e126799.0005-805X (print)2511-6428 (onine)10.3897/contrib.entomol.74.e126799http://hdl.handle.net/2263/99998An illustrated catalogue of South American species of the genus Omorgus Erichson is presented. Based on this study we propose the following taxonomic changes: Omorgus (Omorgus) capillaceus Scholtz, 1990, syn. nov. and Omorgus (O.) lucidus Pittino, 2010, syn. nov. are proposed as junior subjective synonyms of Omorgus (O.) fuliginosus (Robinson, 1941) and Omorgus (O.) ciliatus (Blanchard, 1847), respectively. Lastly, we designated a male neotype for the ubiquitous New World species Trox suberosus Fabricius, 1775 to replace the missing type.en© Vinícius da Costa-Silva et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0).Keratin feedingOmorginiScarabaeoideaSouth AmericaTaxonomyType specimensSDG-15: Life on landSDG-17: Partnerships for the goalsArticle