Taxonomy
This genus includes around 30 subgenera and over 2,200 species. Some of the former subgenera of Onthophagus (including Proagoderus, Diastellopalpus, Digitonthophagus, and Euonthophagus) are now widely recognized as genera.
Subgenera
These subgenera are in accordance with the Catalog of Life and the World Scarabaeidae Database (2023).
- Afrostrandius Moretto, 2009 - tropical Africa
- Altonthophagus Kabakov, 1990 - Palearctic
- Amphionthophagus Martín-Piera & Zunino, 1983 - Palearctic
- Bicornonthophagus Tagliaferri & Moretto, 2012 - tropical Africa
- Colobonthophagus Balthasar, 1935 - Palaearctic, Oriental
- Cryptonthophagus Dierkens, 2022 - tropical Africa
- Drepanonthophagus Dierkens, 2022 - tropical Africa
- Endrodius Balthasar, 1959 - Oriental
- Eremonthophagus Zunino, 1979 - Palearctic
- Exonthophagus Kabakov, 2006 - Palearctic
- Furconthophagus Zunino, 1979 - Palaearctic, Oriental, tropical Africa
- Gibbonthophagus Balthasar, 1935 - Palaearctic, Oriental
- Gonocyphus Lansberge, 1885 - tropical Africa
- Hikidaeus Ochi & Kon, 2016 - Oriental
- Indachorius Balthasar, 1941 - Palaearctic, Oriental
- Indonthophagus Kabakov, 2006 - Palaearctic, Oriental, tropical Africa
- Macronthophagus Ochi, 2003 - Palaearctic, Oriental
- Matashia Matsumura, 1938 - Palaearctic, Oriental
- Micronthophagus Balthasar, 1963 - Oriental, Palaearctic, tropical Africa
- Onthophagiellus Balthasar, 1935 - Oriental
- Onthophagus Latreille, 1802 - worldwide
- Palaeonthophagus Zunino, 1979 - Palearctic
- Paraphanaeomorphus Balthasar, 1959 - Palaearctic, Oriental
- Parentius Zunino, 1979 - Palearctic
- Phanaeomorphus Balthasar, 1935 - Palaearctic, Oriental
- Pseudophanaeomorphus Ochi, 2007 - Oriental
- Serrophorus Balthasar, 1935 - Palaearctic, Oriental
- Sinonthophagus Kabakov, 2006 - Palearctic
- Strandius Balthasar, 1935 - Palaearctic, Oriental, tropical Africa
- Sunenaga Ochi, 2003 - Palaearctic, Oriental
- Trichonthophagus Zunino, 1979 - Palaearctic, Oriental, tropical Africa