Strongylophthalmyia tomentosa, Galinskaya, Tatiana V. & Shatalkin, Anatoly I., 2016

Galinskaya, Tatiana V. & Shatalkin, Anatoly I., 2016, Eight new species of Strongylophthalmyia Heller from Vietnam with a key to species from Vietnam and neighbouring countries (Diptera, Strongylophthalmyiidae), ZooKeys 625, pp. 111-142 : 129-131

Taxon classification Animalia Diptera Strongylophthalmyiidae

Strongylophthalmyia tomentosa sp. n. Figure 8

Type material.

Holotype: 1 female, Vietnam, Lai Châu Province, Tam Duong Distr. (22.37017°N, 103.75793°E), 1745 m, 26.X.2015 (D.Gavryushin). Paratype: 1 female, Vietnam, Lai Châu Province, Hoáng Liên (22.347948°N, 103.769714°E), 1900 m, 11.IV.2012 (A.L.Ozerov).

Diagnosis.

The new species belongs to a large and varied group of species with a yellow postpronotum. Within this group, Strongylophthalmyia tomentosa sp. n. is close to Strongylophthalmyia bifasciata Wang & Yang from China (Zhejiang) on the basis of a longitudinal band running along R2+3 from its base to the medial transverse band. Strongylophthalmyia dorsocentralis has a similar wing band, but this species differs from first two species by many characters, including the coloration of the thorax and by the absence of microsetulae across the mesonotum. Strongylophthalmyia tomentosa sp. n. differs from Strongylophthalmyia bifasciata by the shorter vein R2+3, smaller size of apical spot and by bare arista. Strongylophthalmyia tomentosa sp. n. is also similar to Strongylophthalmyia annulipes sp. n. (see the diagnosis of Strongylophthalmyia annulipes ).

Description.

Female.Head slightly shorter than height. Frons matte black, narrowly yellow anteriorly. The ratio between height of the frons from its anterior margin to hind ocelli to the distance from the hind ocelli to vertex or vti is equal to 2.7. Occiput black, shining, slightly convex. Face yellow with row of short setulae along suture, clypeus yellow shining; parafacial yellow with silver grey tomentum. Gena black with small brownish spot between lateral margin of mouth and parafacial. Antenna yellow, first flagellomere rounded, 0.9 times shorter than height, dark brown on inner surface, narrowly yellow basally, widely dark brown apically and on dorsal margin externally, with short yellow dorsal setulae. Arista dark brown, bare. Mouthparts dark brown; palpus yellow, with short and thick black setulae apically. Chaetotaxy: Two orbital setae (posterior seta 2.6 times longer than anterior seta), 1 ocellar seta, 1 postocellar seta, 1 inner vertical seta, 1 outer vertical seta, frontal setae absent.

Thorax black. Postpronotum, proepisternum, basisternum, anepisternum around of spiracle yellow, and yellow coloration on postpronotum slightly extending to mesonotum (Figure 8a,b). Mesonotum matte, sparsely covered with short pale setulae; pleuron shining; scutellum bare, matte. Legs. Fore legs yellow, fore femur externally with pale brownish spot basally and apically. Mid legs yellow, mid femur with dark brown preapical ring, mid tibia: yellow, dark brown medially. Hind legs yellow, hind femora with dark brown preapical ring and with brown spot basally, hind tibia blackish, yellow basally and in apical quarter; fore tarsi yellow, mid tarsi yellow with brownish apical segment, hind tarsi yellow with three apical segments brownish. Wings with strong apical band, median transverse band on level of dm-cu (section of this vein between C and R2+3 undeveloped). R2+3 long: section of C between R1 and R2+3 1.5 times longer than distal section (between R2+3 and R4+5). R4+5 and M1+2 almost parallel apically. Section of M1+2 between r-m and dm-cu 1.8 times longer than proximal section and 0.6 times shorter than distal section. Cell bm 0.6 times shorter than discal cell. Calypter light grey with fan of very long light setulae on margin. Halter with yellow stem and whitish knob. Chaetotaxy: one very small postpronotal seta, one dorsocentral seta, two notopleural setae, one supraalar seta, one postalar seta, one anepisternal seta, one stout apical scutellar seta. All setae black.

Abdomen black, shining, tergite 1 and basal half of tergite 2 yellow, and one pair of lateral yellow spots on anterior margin of tergite 6 extending to two thirds of its length.

Body length 3.6 mm; wing length 3.7 mm.

Male unknown.

Etymology.

The mesonotum of the new species is covered with short setulae, giving it the appaerance of a felt surface.