Strongylophthalmyia annulipes, 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 : 119

Taxon classification Animalia Diptera Strongylophthalmyiidae

Strongylophthalmyia annulipes sp. n. Figure 1

Type material.

Holotype: 1 male, Vietnam, Lai Châu Province, Hoáng Liên (22.34997°N, 103.76818°E), 1947 m, 11.IV.2012 (D. Gavryushin). Paratypes: 2 female, Vietnam, Lai Châu Province, Hoáng Liên (22.347948°N, 103.769714°E), 1900 m, 16.IV and 19.IV.2012 (A.L. Ozerov); 1 male, 1 female, Vietnam, Lai Châu Province, Hoáng Liên (22.33788°N, 103.77922°E), 2068 m, 21.IV. and 7.V.2013 (T.V.Galinskaya). ZMUM.

Diagnosis.

This new species belongs to a group of species characterized by a yellow postpronotum, propleuron and basisternum. Three species from this group, Strongylophthalmyia humeralis , Strongylophthalmyia bifasciata and Strongylophthalmyia yaoshana are otherwise characterized by an arista with very short setulae and easily differentiated. Other species of this group, Strongylophthalmyia spinosa , Strongylophthalmyia thaii , Strongylophthalmyia coarctata Hendel, 1913 and Strongylophthalmyia macrocera differ from Strongylophthalmyia annulipes by transparent wings. Strongylophthalmyia annulipes sp. n. is close to Strongylophthalmyia tomentosa sp. n. and differs from it by the presence of a preapical black ring on the mid and hind femora and by black ring on the mid and hind tibia.

Description.

Male.Head black, shining, slightly longer than its height; frons entirely black, covered with grey tomentose of by very short setulae (0.01 mm). Occiput slightly convex (in dorsal view). Face black, matte, with row of short setulae along suture; parafacial black, covered with silvery grey tomentum, length of its setulae: 0.021-0.028 mm. Gena with brownish short stripe directly below parafacial. Antenna brownish yellow. First flagellomere rounded, its length almost equal to height; dark brown, narrowly yellow at base, with short yellow setulae dorsally. Arista dark brown, bare. Palpi brownish yellow. Chaetotaxy: three reclinate to lateroclinate orbital setae (the middle seta 2.5 times longer than others), 1 ocellar seta, 1 postocellar seta, 1 inner vertical seta, 1 outer vertical seta, 2 hair-like short frontal setae.

Thorax black. Postpronotum laterally, propleuron, basisternum, and anepisternum around spiracle yellow. Mesonotum matte, sparsely covered with short pale setulae; pleuron shiny; scutellum bare, matte. Legs yellow, mid and hind femora with dark brown preapical ring; mid tibia yellow basally and in apical half, and darkened between these yellow areas; hind tibia darkened, yellowish basally and in apical quarter. Wings with apical spot, with median transverse band on level of dm-cu vein and with weak darkening anteriorly at level of vein Rs. R2+3 long: section of C between R1 and R2+3 1.5 times longer than following 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 approximately 1.8 times longer than proximal section and 0.6 times shorter than distal section. Cell bm is 0.5 times shorter than discal cell. Calypter light grey with fan of very long light setulae on its margin. Halter with yellow stem and whitish knob. Chaetotaxy: one 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 shiny black, narrowly yellow basally.

Body length 4.2 mm. Wing length 3.8 mm.

Female differs from male in following characters. Frontal setulae very short, hardly visible. Palpi dark brown. Mesonotum covered with short setulae. Mid tibia widely darkened, yellowish basally and in apical quarter. Body length 3.8-4.7 mm; wing length 3.5-4.2 mm.

Etymology.

The specific name refers to black ring on mid and hind femora.