Onthophagus istmenus, Moctezuma & Sánchez-Huerta & Halffter, 2020

publication ID	https://doi.org/ 10.1653/024.103.0220
publication LSID	lsid:zoobank.org:pub:5F44E040-1D07-48B0-933F-0A245B22B36D
persistent identifier	https://treatment.plazi.org/id/363AEE3B-FFB9-FFD3-9221-97C7FA200AA7
treatment provided by	Felipe
scientific name	Onthophagus istmenus
status

Key to the species of the Onthophagus belorhinus View in CoL species complex, based on major males

1. Anterior mid-line of the pronotum strongly impressed.................................................................. 2

1’. Anterior mid-line of the pronotum obsolete....................................................... O. istmenus View in CoL new species

2. Bifurcation of clypeal horn v-shaped.................................................... O. grataehelenae Kohlmann & Solís View in CoL

2’. Bifurcation of clypeal horn broadly u-shaped.......................................................................... 3

3. Bifurcation of clypeal horn strongly elongate over the genae, with an indentation in the apex........... O. andersoni Howden & Gill View in CoL

3’. Bifurcation of clypeal horn elongate over the clypeus, without indentations.................................. O. belorhinus Bates View in CoL