Oryctini Mulsant 1842
Creators: name: Costa, Leidiane O.
name: Duarte, Paulo R. M.
name: Iannuzzi, Luciana
name: Grossi, Paschoal C.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae

description: Identification key to the genera of adult Oryctini of South America
1. Body convex dorsally in lateral view. Ventral area of metatarsomeres with a longitudinal row of bristles ......................................................................................................... 2
- Body flattened dorsally in lateral view. Ventral area of metatarsomeres bearing a brush of bristles........................................................................................ Platyphileurus Ohaus
2. Protibia tridentate ............................................................................................................................... 3
- Protibia quadridentate....................................................................................................................... 5
3. Colour black. Elytra nearly smooth, except for a deep sutural stria ............................... 4
- Colour reddish brown. Elytra with distinct rows of punctures................ Coelosis Hope
4. Mandibles bidentate............................................................................................ Megaceras Hope
- Mandibles tridentate.......................................................................... Megaceropsis Dechambre
5. Male head bearing a tubercle, never with a horn. Female pronotum with an anterior tubercle or concavity, or both combined .................................................................................. 6
- Male head bearing a prominent horn. Female pronotum simple, without anterior tubercle or concavity.......................................................................................................................... 8
6. Tergite VII bearing stridulatory apparatus.......................... .......................... Strategus Kirby.
- Tergite VII without stridulatory apparatus................................................................................. 7
7. Teeth small and triangular at galea. Pronotum similar in both sexes, without horn or deep concavity. Female abdomen bearing the ventrite V shorter than ventrite VI...... .............................................................................................................................. Gibboryctes Endrödi.
- Teeth strong and scythe-shaped at galea. Male pronotum with an anterior horn. Pronotal concavity deep in both sexes. Female abdomen bearing the ventrite V longer than ventrite VI.................... .................... Tetragus Duarte and Grossi, gen. nov.
8. Prosternal process conspicuous, produced between coxae. Female head with 1–2 tubercles, never with a prominent horn ................................................................................... 9
- Prosternal process quite reduced, nearly obsolete, confined below coxae. Female head with a prominent horn......................................... ......................................... Enema Hope.
9. Body elongated in overall aspect, subparallel laterally. Anterior margin of clypeus with 2 teeth separated by a wide emargination............ ............ Podischnus Burmeister.
- Body broader in overall aspect, rounded laterally. Anterior margin of clypeus convergent, rounded, or with 2 teeth separated by a small notch............................................. ................................................................................................................ Heterogomphus Burmeister.
description: Published as part of Costa, Leidiane O., Duarte, Paulo R. M., Iannuzzi, Luciana & Grossi, Paschoal C., 2022, Taxonomic revision and notes on natural history of the enigmatic beetle genus Gibboryctes Endrödi (Coleoptera: Melolonthidae: Dynastinae), pp. 191-225 in Journal of Natural History 56 (1 - 4) on pages 221-222, DOI: 10.1080/00222933.2021.2017499, http://zenodo.org/record/6758313