Trichorcus Blackburn, 1892: 73. TS: Trichorcus cinctus Blackburn, 1892a: 73.
The single included species is instantly recognized from all known Chilocorini by its hirsute hemispherical form and brown-grey coloration.
Length 3.9-4.0 mm. Body broadly oval, moderately convex; dorsum densely hairy.Head transverse; eye not emarginate. Antenna 10-segmented, short; scape asymmetrical; terminal antennomere longer than penultimate one. Clypeus short, weakly emarginate medially and extending laterally below eyes; labrum partially exposed. Maxillary palp moderately long, last palpomere securiform. Pronotal base bordered medially, the bordering line continues uninterrupted and is separate from fine marginal line; prosternum moderately long in front of procoxae; prosternal process narrow, without carinae; hypomeral fovea near anterior angles of prosternum absent. All tibiae simple externally; meso- and metatibiae with apical spurs; claw strongly appendiculate. Elytral margin weakly reflexed without clear bead; epipleuron descending without foveae. Abdomen with 6th ventrite visible in male; postcoxal lines separated at middle, each running parallel to posterior margin and abruptly recurving apically. Male terminalia. Parameres and phallobase symmetrical; penis guide symmetrical. Parameres articulated with phallobase. Penis stout, consisting of single sclerite; basal capsule distinct and T-shaped. Apodeme of male sternum 9 very narrow and rod-like. Female unknown.
Distribution and Biology
Monotypic genus known only from New South Wales. Biology unknown.
Blackburn, T. 1892. Further notes on Australian Coleoptera, with descriptions of new genera and species. XI. Transactions of the Royal Society of South Australia, 15(1): 20-73.
Slipinski, A, and J. A Giorgi. 2006. Revision of the Australian Coccinellidae (Coccinellidae). Part 6. Tribe Chilocorini. Annales Zoologici (Warszawa), 56, (2): 265-304.
Slipinski, S.A. 2007. Australian Ladybird Beetles (Coleoptera: Coccinellidae) their biology and classification. ABRS, Canberra. 286 pp.
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