Austrosciara trichovenosa, Mohrig & Kauschke & Broadley, 2018

Mohrig, Werner, Kauschke, Ellen & Broadley, Adam, 2018, New black fungus gnats (Diptera: Sciaridae) from Eastern Australia, Zootaxa 4450 (2), pp. 203-241 : 210

Austrosciara trichovenosa sp. n.

( Fig. 5 A–D )

Type locality: Australia, Victoria, Wilsons Promontory.

Holotype: Male, September 1977, leg. A.J. Stocker, ASCT 00050344 ( ASCU).

Description. Male. Head. Dark brown. Eye bridge 3–4 facets wide. Antenna brown; 4th flagellomere with l/w index of 4.0, hairs dark, somewhat longer than the diameter of the basal node; neck rather short, brown. Palpus 3- segmented, yellowish, basal segment with 2 bristles and a flat patch of sensillae. Thorax. Brown. Scutum with brown hairs, some lateral and prescutellar bristles longer; scutellum with 4 marginal bristles; postpronotum bare. Wing brownish; R1 long, nearly =R; R5 along nearly the entire length with ventral macrotrichia; C = 2/3 w; y = x, with macrotrichia; posterior wing veins with macrotrichia. Haltere short, brown. Coxae and legs brown; apex of fore tibia with a broad comb of hyaline bristles, not distinctly divided; spurs of middle and hind tibiae equal in size, longer than the diameter of the apex; claws without teeth. Abdomen. Brownish. Hypopygium rather broadly vshaped on the ventral base; gonocoxites at the inner ventral margin with rather short hairs; gonostylus basally broad and bulbous, in the distal third pointed, with a rather short apical tooth and a subapical group of about 8–10 dense spines, somewhat shorter than the tooth. Tegmen pyramid-like, apically nearly straight, with fine teeth. Aedeagus rather long. Body length: 3.0 mm.

Comments. The species is characterized by long flagellomeres, macrotrichia on all posterior wing veins and a robust gonostylus with a dense group of about 10 spines below the small apical tooth.

Distribution. Australia: Victoria.

Figures

FIGURE 5. Austrosciara trichovenosa sp. n. A. Hypopygium; B. FlagEllomErEs 3–5; C. Tibial organ; D. Wing.