Onorius (Coleoptera, Scarabaeidae)

Onorius inexpectatus habitus of male

Genus Onorius Frolov et Vaz-de-Mello, 2015


Type species: Onorius inexpectatus Frolov et Vaz-de-Mello, 2015, by monotypy.


Medium-sized beetles with uniform black or brown coloration. Dorsal surface shiny, punctate with rounded punctures. Clypeus symmetrical or subsymmetrical, slightly convex anteriorly. Mandibles of the same length, feebly visible in dorsal view. Labrum hidden under clypeus. Head without suturae and medial tubercle. Pronotum narrower than elytra in both sexes; lateral and basal margins bordered and widely rounded, posterior angles rounded, anterior margin not bordered. Disc of pronotum with a small fossa medioanteriorly in male, evenly convex in female. Elytra without distinct striae visible as either depressed lines or puncture rows, with well-developed humeral and apical humps. Scutellum triangular. Wings developed. Mesacoxal cavities connected by a hole. Anterior tibiae with three outer teeth, somewhat serrate basad of the teeth; in males, anterior spur is absent as in all Orphninae genera, but there is a smaller tooth directed mediad, similar to the males of other South American genera. Tarsi relatively robust end densely punctured; apical tarsomere wider in lateral view than other tarsomeres, especially in protarsi, subequal in length to basal tarsomere in middle and hind tarsi. Phallobase tube-shaped; parameres symmetrical, with processes apically.

Species composition. Two species are known.

Distribution. Onorius inexpectatus was described from a small area in the Toachi River valley (Cotopaxi Province, Central Ecuador) and O. sp. is known from a single female from Alto Marzo in Zamora-Chinchipe province of Ecuador.


Frolov A. V. & Vaz-de-Mello F. Z. 2015. A new genus of the Orphninae (Coleoptera, Scarabaeidae) associated with epiphytes in cloud Andenian forest. Zootaxa, 4007 (3): 433–436

Frolov A. V., Akhmetova L. A., Vaz-de-Mello F. Z. 2019. Contribution to the knowledge of the Neotropical canopy dwelling genus Onorius (Coleoptera, Scarabaeidae, Orphninae): another species from southern Ecuador and notes on the hind gut morphology in the Orphninae. Journal of Natural History. 53 (17–18): 1071–1077.