Onthophagus fuscus Boucomont 1932
Creators: name: Joaqui, Tatiana
name: Moctezuma, Victor
name: Sánchez-Huerta, José Luis
name: Escobar, Federico
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Onthophagus
Onthophagus fuscus

description: Key for the identification of adult major male specimens of the Onthophagus fuscus species complex
(modified from Zunino & Halffter 1988).
1 Clypeus not transverse, obtusely pentagonal and not concave or weakly concave (Figs. 1, 3, 5, 7, 9, 13)................. 2
- Clypeus transverse, obtusely trapezoidal and strongly concave (Fig. 11).......................................... 7
2 Frontal carina complete................................................................................. 3
- Frontal carina limited to the medial region.................................................................. 5
3 Dorsal setae (pronotum and elytra) relatively long (length: 0.1 ± 0.03 mm). Pronotal disc glabrous medially (Figs. 3–4, 18 – 20). Michoacán, Mexico ...................................................... O. canescens Zunino & Halffter, 1988
- Pronotal setae relatively short (length: 0.07 ± 0.02 mm). Pubescence present on the entire pronotal disc................. 4
4 Protonal surface coppery without olive-green sheen and elliptical impressions. Clypeal carina lacking (Figs. 9–10, 18 – 20). Hidalgo, Puebla, and Veracruz, Mexico ...................................... O. parafuscus Zunino & Halffter, 2005
- Protonal surface coppery with an olive-green sheen, with two more-or-less elliptical impressions on each of midline. Clypeal carina weakly impressed (Figs. 13 – 16). Veracruz, Mexico .................................................................................................... O. orizabensis Moctezuma, Joaqui, & Sánchez-Huerta, new species
5 Frontal carina produced into an acute or flattened triangular tubercle between the genal sutures. Elytral striae fine (Figs. 7–8, 18 – 20). Durango, Jalisco, and Sinaloa, Mexico .............................. O. pseudofuscus Zunino & Halffter, 1988
- Frontal carina not produced into an acute tubercle. Elytral striae strongly impressed................................. 6
6 Clypeal carina present, but weakly developed. Dorsal surface dark brown with a weak greenish-cupreous sheen (Figs. 1, 2, 18 – 20). Aguascalientes, Durango, Jalisco, and Zacatecas, Mexico ............................. O. fuscus Boucomont, 1932
- Clypeal carina absent. Dorsal surface coppery with a strong metallic sheen (Fig. 5–6, 18 – 20). Morelos, Mexico ................................................................................. O. mycetorum Zunino & Halffter, 1988
7 Pubescence uniform in size and density on the pronotal disc (Fig. 11–12). Puebla, Mexico ......................................................................................... O. clavijeroi Moctezuma, Rossini, & Zunino, 2016
- Pubescence reduced in size and density on the postero-central region of the pronotal disc. See dorsal habitus at http:// unibio.unam.mx/irekani/bitstream/123456789/12809/1/9035.jpg. Morelos, Mexico .................................................................................................... O. navarretorum Delgado & Capistan, 1996
description: Published as part of Joaqui, Tatiana, Moctezuma, Victor, Sánchez-Huerta, José Luis & Escobar, Federico, 2019, The Onthophagus fuscus (Coleoptera: Scarabaeidae) species complex: an update and the description of a new species, pp. 151-186 in Zootaxa 4555 (2) on page 177, DOI: 10.11646/zootaxa.4555.2.1, http://zenodo.org/record/2624219