Stegana (Oxyphortica) dawa Zhang and Chen, 2017

Wang, Nannan, Zhang, Yuan, Cheng, Yu & Chen, Hongwei, 2017, Nine new species of the subgenus Stegana (Oxyphortica) from the Oriental region, with morphological and molecular evidence based on Chinese species (Diptera: Drosophilidae), Journal of Natural History 51 (33 - 34), pp. 1943-1970 : 1958-1959

publication ID	https://doi.org/ 10.1080/00222933.2017.1360960
publication LSID	lsid:zoobank.org:pub:2FA403F6-5535-40A4-9FD0-ADB9913EDE83
persistent identifier	https://treatment.plazi.org/id/03A287F6-FFCB-FFE3-0571-856FFE8FFA99
treatment provided by	Felipe
scientific name	Stegana (Oxyphortica) dawa Zhang and Chen
status	sp. nov.

Treatment

Stegana (Oxyphortica) dawa Zhang and Chen , sp. nov.

(Figures 2(h), 4(d), 5(i) and 10).

Diagnosis

This species is related to S. (O.) chuanjiangi sp. nov. in the colour pattern of body and shapes of aedeagus and gonopods, but can be distinguished by the aedeagus longer than wide, apically straight and slightly bilobed in lateral view ( Figure 10 View Figure 10 (d)).

Description

Clypeus brown. Palpus yellow. Mesoscutum yellow medially, with two pairs of broad, brown longitudinal stripes sublaterally ( Figure 4 View Figure 4 (d)). Scutellum brown medially, yellow along margin ( Figure 4 View Figure 4 (d)). Katepisternum yellow, slightly brownish anteriorly. Wing greyish basally, greyish brown distally, posterior crossvein and neighbouring longitudinal veins darkened (Figure 2(h)). Abdominal tergites: 1st yellow; 2nd and 3rd yellow medially, dark brown laterally; 4th to 6th almost entirely dark brown, slightly yellow along anteromedially ( Figure 5 View Figure 5 (i)). Male terminalia: Epandrium nearly rectangular on posterolateral corners, with dense pubescence and setae ( Figure 10 View Figure 10 (a)). Cercus lacking pubescence ( Figure 10 View Figure 10 (a)). Surstylus small lobe-shaped, with several setae each basally and apically ( Figure 10 View Figure 10 (a, b)). Parameres absent ( Figure 10 View Figure 10 (c, d)). Aedeagus broadened mediolaterally and strongly sclerotized except peristome, pubescent ventrally, and with one pair of small projections above peristome; expanded outward on both sides of peristome ( Figure 10 View Figure 10 (c, d)). Gonopods broadened to hood-shaped, not bilobed apically ( Figure 10 View Figure 10 (e)).

Measurements

BL = 2.24 mm in holotype (range in five males and five females paratypes: 2.72–3.60 mm in males, 3.32–4.10 mm in females), ThL = 1.80 mm (1.32–1.68 mm in males, 1.60–1. 84 mm in females), WL = 3.08 mm (2.52–2.88 mm in males, 2.72–3.40 mm in females), WW = 1.52 mm (1.20–1.36 mm in males, 1.33–1.64 mm in females), arb = 4/3 (4–6/3), avd = 0.54 (0.60–0.92), adf = 2.60 (1.29–3.67), flw = 1.60 (1.50–3.75), FW/HW = 0.38 (0.28– 0.44), ch/o = 0.14 (0.13–0.19), prorb = 1.05 (0.80–1.20), rcorb = 0.79 (0.50–0.71), vb = 0.63 (0.43–0.75), dcl = 0.50 (0.35–0.52), presctl = 0.50 (0.38–0.52), sctl = 1.27 (1.08–1.34), sterno = 0.86 (0.71–1.00), orbito = 2.25 (1.20–3.5), dcp = 0.37 (0.26–0.41), sctlp = 0.90 (0.73–1.13), C = 2.33 (1.79–2.65), 4c = 1.00 (0.80–1.00), 4v = 2.00 (1.67–2.04), 5x = 1.67 (1.30–1.70), ac = 6.00 (5.20–6.67), M = 0.63 (0.48–0.57), C3F = 0.80 (0.75–0.87).

Type specimens

Holotype male ( SCAU, No. 121025), China: Beibeng, Motuo , Xizang, 29°19 ʹ N, 95°20 ʹ E, altitude 780 m, 29 September–1 October 2010, ex tussock, JJ Gao GoogleMaps . Paratypes: China: seven males, eight females (two males, two females in KIZ, Nos. 0088148–51; five males, six females in SCAU, Nos. 121026–36), same data as holotype, JJ Gao, YR Su, L Wang, L Wu GoogleMaps .

Etymology

The name means ‘moon goddess’ in the language of the Tibet nationality in Xizang, PR China .

Distribution

China (Xizang).