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Actenomeros corniculaticaudus Winterton & Irwin, 1999b: 280.
Head sub-spherical; frons grey to gold pubescent; minute, dark setae sometimes present; frons flat to rounded, width sexually dimorphic, male frons narrower, but eyes not contiguous; occiput concave; two-three poorly defined rows of postocular macrosetae, rarely a single row in female; antenna length shorter than head; scape and pedicel short cylindrical, with strong dark setae; flagellum conical, compressed laterally, style terminal; sternopleuron glabrous medially; legs pale yellow, tarsi darkened distally; mid coxa without setae on posterior surface; hind femur with dark, anteroventral setae sub-apically; fore and hind femora without velutum patches; scutal chaetotaxy: np, 3–4; sa, 2; pa, 1; dc, 2–4; sc, 1; wing cell m3 open; abdomen black, male often with extensive abdominal velutum, female often with triangular patches of velutum laterally on segments; male genitalia without velutum patches on ventral surface of gonocoxites; gonocoxite with outer process present, often long, upward directed and horn-like; articulated gonocoxal process greatly reduced or absent; ventral lobe of gonocoxite sometimes greatly enlarged; hypandrium triangular, glabrous, fused to gonocoxites laterally; gonocoxal apodeme relatively short; distiphallus narrow, straight; dorsal apodeme of parameral sheath ‘T’-shaped; ejaculatory apodemes relatively small, narrow; ventral apodeme forked; female genitalia with A1 and A2 acanthophorite spines well developed; tergite 8 with narrow process on anterior margin; furca sclerotized in a narrow ring; three spherical spermathecae; spermathecal sac shape trilobate, spermathecal duct arrangement paired, one spermathecal duct joining to each spermathecal sac duct or rarely alternating along common spermathecal sac duct (Actenomeros intermedia).
Winterton et al. (1999b) noted that this genus superficially resembles Nanexila but is differentiated by 2–3 rows of postocular setae and male genitalic features such as a reduced or absent articulated gonocoxal process and sometimes a large horn-shaped outer process on the gonocoxite. The remaining species in the Nanexila atricostalis species-group (i.e. Nanexila atricostalis Winterton & Irwin and Nanexila jimrodmani Winterton) retained in Nanexila have a well-formed articulated gonocoxal process and can be distinguished from Actenomeros species using the key to Australasian genera in Winterton (2011). The horn-like process on the gonocoxites is only present in Actenomeros corniculaticaudus and Actenomeros onyx. Males are unknown for Actenomeros aureilineata comb. n.and Actenomeros intermedia comb. n.; females of these two species are described by Winterton et al. (1999b).
Actenomeros aureilineata (Winterton & Irwin) comb. n., Actenomeros budawang sp. n., Actenomeros corniculaticaudus Winterton & Irwin, Actenomeros intermedia (Winterton & Irwin) comb. n., Actenomeros onyx Winterton & Irwinand Actenomeros paradoxa (Winterton & Irwin) comb. n.
Key to Actenomeros species
- Winterton, S; 2011: Review of the stiletto fly genus Actenomeros Winterton & Irwin (Diptera, Therevidae, Agapophytinae) ZooKeys, 120: 55-63. doi
- Winterton S, Irwin M, Yeates D (1999b) Phylogenetic revision of the Taenogera Kröber genus-group (Diptera: Therevidae), with descriptions of two new genera. Australian Journal of Entomology 38: 274-290. doi:10.1046/j.1440-6055.1999.00126.x
- Winterton S (2011) New stiletto flies in the genera Acupalpa Kröber and Pipinnipons Winterton (Diptera: Therevidae: Agapophytinae) described using cybertaxonomic tools. Zookeys 95: 29-78.