Frolov, A.V., Grossi, P.C., Vaz-De-Mello, F.Z. 2015. A new species of the genus Aegidium (Coleoptera, Scarabaeidae) from the Atlantic Forest ecoregion in South America. Zootaxa, 4007 (3), 437–439.
The New World genus Aegidium Arrow comprises mid-sized to rather large beetles belonging to 12 species. The genus is distributed up to southern Mexico in the north (Morón 1991) and A. cribratum chileanum Paulian was described from Chile, but Aegidium has not been recorded southeast of the Amazonia. An interesting discovery was made by one of us (P.C.G.) who collected one male Aegidium specimen in the Atlantic forest patch near Nova Friburgo (Rio de Janeiro State, Brazil) — the area separated from the yet known range of the genus by vast territories occupied by the Cerrado biome. Examination of this specimen showed that it belongs to an undescribed species and differs sharply from the other congeners in the shape of its aedeagus.