Orphninae

Frolov, Andrey V. & Vaz-De-Mello, Fernando Z., 2015, A new genus and species of Orphninae (Coleoptera: Scarabaeidae) associated with epiphytes in an Andean cloud forest in Ecuador, Zootaxa 4007 (3), pp. 433-436 : 435-436

Key to the New World Orphninae genera

1. Mandibles and labrum strongly protruding past anterior margin of clypeus; outer margins of mandibles with angulate processes ....................................................................................................................................... Aegidinus Arrow

- Mandibles and labrum weakly or not protruding past anterior margin of clypeus; outer margins of mandibles without angulate processes ........................................................................................................................................................ 2

2. Pronotum with irregularly shaped undulating contiguous punctures and with sparse erect setae.................................. .................................................................................................................. Paraegidium Vulcano, Pereira , & Martínez

- Pronotum with round punctures, glabrous or with minute seta in center of punctures ............................................... 3

3. Tarsomere 5 relatively robust, wider in lateral view than other tarsomeres, especially in protarsi, and subequal in length to tarsomere 1 in mesotarsi and metatarsi ........................................................ Onorius Frolov & Vaz-de-Mello

- Tarsomere 5 relatively slender, not or weakly wider in lateral view than other tarsomeres, reasonably shorter than tarsomere 1 in mesotarsi and metatarsi ....................................................................................................................... 4

4. Elytral striae as longitudinal rows of punctures; sutural stria normally distinct as a depressed furrow in apical half of elytron; punctation of elytra sparser (elytra appear shiny); elytra without elevated longitudinal keels or smooth stripes on disc; female with a tubercle on anterior margin of pronotum ....................................... Aegidiellus Paulian

- Elytral striae indistinct including sutural stria; punctation of elytra denser (elytra appear opaque to matte); elytron on disc normally with 1 or 2 weakly elevated longitudinal keels, sometimes appearing as smooth stripes on densely punctate background; female without tubercle on anterior margin of pronotum ......................... Aegidium Westwood