Anabarhynchus longiseta Ferguson

Ferguson, David J., Lambkin, Christine L. & Yeates, David K., 2014, Eight new species of Australian stiletto flies in the genus Anabarhynchus Macquart (Diptera: Therevidae) from South East Queensland, Zootaxa 3802 (4), pp. 553-582 : 564-566

Anabarhynchus longiseta Ferguson sp. n.

( Figs 11 , 12 , 13 )

Type material. Holotype: Female. AUSTRALIA: Queensland: Scrub Road, Brisbane Forest Park, GPS: 27°25'06"S, 152°50'14"E, 12.ix.1997, in creek bed; S. Winterton, N. Power, Malaise trap 1; (QM_T:185530) (QM). Condition: dorsally pinned with micro pin into foam pith, left hind leg missing.

Diagnosis. Frons flat, middle frons concave with brownish grey pubescence; frontal setae sparse, very short and in 2 rows; female frons width 5.2 × ocellus width; postspiracular pile represented by only 1 or 2 hairs; katepisternum with pile; prosternal furrow without pile; wing with infuscated elliptical spot between vein R5 and M1; fore femur 1 av at middle; hind femur 1 av macroseta. All femora yellow-brown, fore femur with brown band medially; female tergite 8 with long flat curved reddish brown pile; female sternite 8 with long black setae on lateral margins.

Description. Female. Body length: 5.5 mm. Wing length: 6 mm. ( Figs 11–13 ). Head. Integument black. Lower frons slightly raised, middle frons with a pair of depressions either side of mid-line, upper frons slightly raised, width 5.2 × ocellus width; ocellar tubercle flat; antennal base positioned low on frons, face and lower frons slightly protruding; parafacial grey pubescence; lateral area of antenna with large irregular shaped spot; frontal setae short, sparse and black, lower frons setae erect and a third the length of scape. Scape length 2.75 × pedicel length; scape and pedicel yellow-brown, f1 yellow-brown without a short black seta; f2 & f3 blackish brown, combined length a quarter length of f1. Occiput convex with grey pubescence, pair of indistinct rows of black macrosetae, 20 setae on each side; postocciput to gena with grey pubescence and sparse, long, pale, hairs; black pile admixed with pale pile on anterior gena at ventral edge of eye. Palp grey with pale hairs; labellum grey; prementum setae pale. Thorax. Integument black: scutal chaetotaxy black (pairs): np 4; sa 2; pa 1; dc 3; sc, 2. Scutum with thin brown medial line widening slightly posteriorly, two short wider vittae on anterior third; scutal surface with short appressed dark setae. Katepisternum with pale pile; prosternal furrow without pile; pleura grey; coxae grey with long pile admixed with black macrosetae. Wings. Hyaline with brownish grey infuscation, brown infuscation along dark brown veins, elliptical brown infuscated spot medially between vein R5 and M1, stigma brown; costal setae beyond humeral cross-vein biserially arranged. Haltere. Pedicel dirty white; knob ventrally white, dorsally brown. Legs. Fore femur with 1 av at middle; hind femur with 1 av macrosetae; with sparse black setae admixed with pale appressed pile. Fore femur yellow-brown with grey pubescence, middle with broad brown band; middle and hind femora yellowbrown; sparse pale appressed pile on all surfaces, longest on posterior surface admixed with short black setae predominantly on dorsal surfaces; all tibia and tarsi yellow-brown, apically darker. Abdomen. Integument yellowbrown, dark brown dorsomedially, tergites 2–7 with anterior bands dark brown, sparsely covered with appressed dark setae, laterally yellow-brown, with erect pale setae, apical bands grey white; sternites 2–6 basal half darkbrown, apical half yellow-brown, surfaced with grey pubescence and sparsely covered with erect pale setae, apical bands grey white. Tergite and sternite 8 with long pile ( Fig. 12 ). Terminalia. Not dissected.

Male. Unknown.

Etymology. The specific epithet ‘ longiseta ’ is Latin for ‘long setae’ referring to the long specialised abdominal setae of the female.

Comments. Anabarhynchus longiseta sp. n. is known from a single female specimen collected in September, at Brisbane Forest Park, Queensland.

Keys to couplet 8 in Lyneborg (2001) and can be readily separated from both A. danielsi Lyneborg and A. lanatus Lyneborg with dark grey femora and antenna dark grey. Anabarhynchus longiseta sp. n. have yellowbrown femora except fore femur with a dark brown band medially and the antenna are yellowish. Unusual for Anabarhynchus , A. longiseta sp. n., has an elliptical infuscated spot medially between veins R5 and M1, as well as long pile on tergite 8 and sternite 8, not seen previously in Anabarhynchus or other Therevidae . Its relationship to a species-group has not been determined.

Figures

FIGURE 11. Anabarhynchus longiseta sp. n., holotype female (QM _ T: 185530): lateral view. Scale line = 2 mm.

FIGURE 12. Anabarhynchus longiseta sp. n., holotype female, (QM _ T: 185530): oblique view. Scale line = 2 mm.

FIGURE 13. Anabarhynchus longiseta sp. n., holotype female (QM _ T: 185530): oblique view of terminalia; black arrow indicates tergite 8 pile; white arrow indicates sternite 8 black setae. Scale line = 1 mm.