Strongylophthalmyia obtecta, 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 : 126

Taxon classification Animalia Diptera Strongylophthalmyiidae

Strongylophthalmyia obtecta sp. n. Figure 5

Type material.

Holotype: 1 female, Vietnam, Lai Châu Province, Hoáng Liên (22.347948°N, 103.769714°E), 1900 m, 18.IV.2012 (A.L. Ozerov). Paratype: 1 female, Vietnam, Lai Châu Province, (22.347948°N, 103.769714°E), 1947 m, 22.V.2014 (D. Gavryushin) ZMUM.

Diagnosis.

Strongylophthalmyia obtecta sp. n. and Strongylophthalmyia stricta sp. n. have the thorax with 2 dc and two rows of black setulae on the line of dc with one large setula before transverse suture, 2 rows of long black ac. Based on these characters both species are close to Strongylophthalmyia raricornis Shatalkin, 1981; Strongylophthalmyia raricornis differs from two new species by first flagellomere bilobate. Strongylophthalmyia obtecta sp. n. differs from Strongylophthalmyia stricta sp. n. in having fore femur and tibia yellow; and by having the two distal segments of the tarsus black (distal three segments black in female of Strongylophthalmyia stricta sp. n.)

Description.

Female.Head entirely black, 0.9 times shorter than height; frons shining, entirely black, upper occiput slightly convex. Gena narrow; postgena broad, approximately 0.5 times shorter than eye height. Face dark brown, matte, with row of short setulae along suture. Parafacial with silvery grey tomentum, these setulae 0.25 times shorter than setulae along facial suture. Scape and pedicel yellowish brown, first flagellomere length almost equal to height. First flagellomere dark brown, with long pale marginal setulae, nearly 3 times less than flagellomere width. Arista dark brown, bare. Mouthparts and palpus black. Chaetotaxy: three orbital setae (medial seta 1.8 times longer than others); 1 ocellar seta, 1 postocellar seta, 1 inner vertical seta, 1 outer vertical seta; hair-like short frontal setae present.

Thorax black. Postpronotum laterally, proepisternum, anepisternum behind anterior spiracle yellowish brown, shining. Mesonotum matte, with rows of black setulae; dc row of setae includes 1+2 large dc; pleuron shining; scutellum slightly shiny. Legs. Fore coxa yellow with blackish stripe on anterior surface basally, mid and hind coxae yellow. Fore femur yellow, with blackish ring in apical third; mid and hind femora black, narrowly yellowish basally; fore tibia yellow, mid and hind tibia black, tarsi yellow, segment 3 brown, segments 4-5 dark brown to black. Wings with apical spot, median transverse band on level of dm-cu and with light brown spot anteriorly on level of Rs. Distal border of median band nearly reaching apex of vein R2+3. Vein R2+3 long: section of C between R1 and R2+3 1.5 times longer than section between R2+3 and R4+5. Veins R4+5 and M1+2 almost parallel apically. Section of M1+2 between r-m and dm-cu slightly concave, 2.5 times longer than proximal section and 0.7 times shorter than distal section. Cell bm 0.4 times shorter than discal cell. Calypter brownish grey with fan of very long yellowish setulae on margin. Halter with brownish stem and whitish knob. Chaetotaxy: one short postpronotal seta, two dorsocentral seta and two rows of black setulae on the line of dc with one large setula before transverse suture, two rows of long black acrostichal setulae, two notopleural setae, one supraalar seta, one postalar seta, one anepisternal seta, one stout apical scutellar seta and one short discal scutellar seta in front of apical ones. All setae black.

Abdomen shiny black, with brownish tinge on anterior margin of tergite 1.

Body length 4.2 mm (4.6 in paratype); wing length 3.7 mm (4.1 in paratype).

Male unknown.

Etymology.

Obtectus (Latin) = matted. In this case it refers to the setulae covering the mesonotum.