Heterogomphus, Burmeister, 1847

Alvarez, Héctor Jaime Gasca, da, Claudio Ruy Vasconcelos, Fonseca & Ratcliffe, Brett C., 2008, Synopsis of the Oryctini (Coleoptera: Scarabaeidae: Dynastinae) from the Brazilian Amazon, Insecta Mundi 2008 (61), pp. 1-62 : 18

Key to the species of adult Heterogomphus of the Brazilian Amazon

1. Mandibles simple, with a large blade. Clypeal apex with a median notch forming 2 lobes ( Fig. 41 ). Each side of pronotum with a tuberculiform process ............................................................... 2

— Mandibles bidentate, teeth subequal in size, with rounded apex. Clypeus truncate or with 2 teeth. Sides of pronotum without structures or tubercles .................................................................. 3

2(1). Apex of metatibia crenulate. Pronotal prominence high, apex bilobed, slightly curved. Sides of pronotum with a conical tubercle. Fovea of pronotum broad, smooth .... H. aidoneus (Perty)

— Apex of metatibia usually with a row of thick spinules ( Fig. 42 ). Pronotal prominence high, projecting forward, apex with a notch forming 2 broad lobes. Sides of pronotum with a tuberculiform process. Fovea of pronotum broad, deep, surface densely setose ......................... ............................................................................................................ H. ulysses Burmeister

Figures

Figure 39-44. Heterogomphus ulysses. 39) Habitus. 40) Male head and pronotum (lateral view). 41) Male head (dorsal view). 42) Metatibia (scale line: 5 mm). 43) Parameres frontal view. 44) Parameres lateral view (scale line: 1 mm).