Genus Onthophagus Latreille, 1802

Onthophagus Latreille, 1802: 141 (original description). Type species: Scarabaeus taurus Schreber, 1759, by original monotypy.

Chalcoderus Erichson, 1847b: 763 (original description). Type species: no fixation known to us.

Monapus Erichson, 1847b: 763 (original description). Type species: no fixation known to us; no nominal species seem to have been originally included. Chamorro et al. (2019) stated the type species was “probably” Onthophagus mniszechi Harold, 1869, but did not explain why they thought so.

Psilax Erichson, 1847b: 764 (original description). Type species: Onthophagus pronus Erichson, 1842, by original monotypy.

Macropocopris Arrow, 1920: 435 (original description). Type species: Macropocopris prehensilis Arrow, 1920, by subsequent designation of Matthews (1972).

Onthophagus – Le Peletier de Saint-Fargeau & Audinet-Serville 1828: 353 (redescription). — Agassiz 1846: 749 (catalogue). — Latreille 1829: 536 (redescription). — Brullé 1838: 300 (redescription). — Castelnau 1840: 83 (redescription). — Lacordaire 1855: 107 (redescription). — Harold 1869d: 1024 (catalogue). — Gillet 1911b: 118 (catalogue). — Gillet & Boucomont 1927: 205 (catalogue). — Dawson 1922: 61 (key). — Paulian 1938: 232 (key). — Blackwelder 1944: 211 (list). — Roze 1955: 45 (checklist for Venezuela). — Martínez 1959: 108 (catalogue for Argentina). — Howden & Cartwright 1963: 6 (redescription). — Halffter & Matthews 1966: 254 (catalog, distribution). — Vulcano & Pereira 1967: 562 (key). — Howden & Young 1981: 11, 93 (key, redescription). — Halffter & Edmonds 1982: 135 (catalog, distribution). — Huchet 1992: 300 (key). — Medina & Lopera-Toro 2000: 301 (key). — Vaz-de-Mello 2000: 194 (checklist for Brazil). — Medina et al. 2001: 139 (list for Colombia). — Kohlmann & Solís 2001: 160 (redescription). — Ratcliffe 2002: 17 (checklist for Panama). — Ratcliffe et al. 2002: 49 (key). — Hamel-Leigue et al. 2006: 16 (list for Bolivia). — Pulido-Herrera & Zunino 2007: 94 (catalogue). — Vaz-de-Mello et al. 2011a: 23 (key). — Carvajal et al. 2011: 145, 322 (diagnosis, list). — Krajcik 2012: 174 (list). — Solís & Kohlmann 2012: 8 (checklist for Costa Rica). — Chamorro et al. 2018: 74, 96–97 (list for Ecuador); 2019: 179 (catalogue). — Hielkema & Hielkema 2019: 90 (catalogue for the Guianas).

Chalcoderus – Lacordaire 1855: 109 (comments). — Harold 1869d: 1024 (cited as synonym of Onthophagus). — Gillet 1911b: 118 (cited as synonym of Onthophagus). — Blackwelder 1944: 211 (cited as synonym of Onthophagus). — Solís & Kohlmann 2012: 8 (cited as synonym of Onthophagus).

Monapus – Lacordaire 1855: 109 (comments). — Harold 1869d: 1024 (cited as synonym of Onthophagus). — Gillet 1911b: 118 (cited as synonym of Onthophagus). — Blackwelder 1944: 211 (cited as synonym of Onthophagus). — Solís & Kohlmann 2012: 8 (cited as synonym of Onthophagus).

Psilax – Lacordaire 1855: 109 (comments). — Harold 1869d: 1024 (cited as synonym of Onthophagus). — Gillet 1911b: 118 (cited as synonym of Onthophagus). — Blackwelder 1944: 211 (cited as synonym of Onthophagus). — Solís & Kohlmann 2012: 8 (cited as synonym of Onthophagus).

Macropocopris – Halffter & Matthews 1966: 254 (cited as genus). — Halffter & Edmonds 1982: 135 (cited as synonym of Onthophagus). — Solís & Kohlmann 2012: 8 (cited as synonym of Onthophagus).