Stegana (Oxyphortica) luchun Wang 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 : 1962-1964

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-FFCF-FFE4-0501-828BFE90FBA9
treatment provided by	Felipe
scientific name	Stegana (Oxyphortica) luchun Wang and Chen
status	sp. nov.

Treatment

Stegana (Oxyphortica) luchun Wang and Chen , sp. nov.

( Figures 3 View Figure 3 (b), 4(f), 6(b) and 13).

Diagnosis

This species is similar to S. (O.) dainuo sp. nov. in the shape of aedeagus in ventral view, but differs by having the aedeagus not expanded outward on both sides of peristome, slightly protruded dorsally ( Figure 13 View Figure 13 (c, d)). The 8.6% interspecific genetic distance to S. (O). dainuo sp. nov. is one of the smallest interspecific distances ascertained within this subgenus.

Description

Clypeus yellowish brown to dark brown. Palpus yellowish brown. Mesoscutum brownish yellow, with two pairs of broad, brownish longitudinal stripes each submedially and sublaterally ( Figure 4 View Figure 4 (f)). Scutellum brown, dark brown along margin, yellow at tip ( Figure 4 View Figure 4 (f)). Katepisternum yellow. Wing grey, greyish brown anterodistally ( Figure 3 View Figure 3 (b)). Abdominal tergites: 1st yellow; 2nd and 3rd yellow medially, dark brown to black laterally, with one small dark brown patch on 2nd; 4th mostly dark brown to black, submedially with two yellow triangular patches along anterior margin. 5th and 6th mostly dark brown to black, yellow anteromedially ( Figure 6 View Figure 6 (b)). Male terminalia: Epandrium undeveloped on posterolateral corners, with dense pubescence and setae ( Figure 13 View Figure 13 (a)). Cercus pubescent above ( Figure 13 View Figure 13 (a)). Surstylus small, lobe-shaped, with several setae each basally and apically ( Figure 13 View Figure 13 (a, b)). Parameres absent ( Figure 13 View Figure 13 (c, d)). Aedeagus sclerotized except peristome ( Figure 13 View Figure 13 (c, d)). Gonopods medially broadened, hood-shaped ( Figure 13 View Figure 13 (e)).

Measurements

BL = 2.50 mm in holotype (range in five males and two females paratypes: 2.77–3.73 mm in males, 3.78–4.00 mm in females), ThL = 1.13 mm (1.30–1.56 mm in males, 1.69– 1.73 mm in females), WL = 2.00 mm (2.17–3.03 mm in males, 3.00– 3.12 mm in females), WW = 0.90 mm (1.00– 1.20 mm in males, 1.23–1.40 mm in females), arb = 6/4 (6–8/4–5), avd = 0.85 (0.65–1.00), adf = 3.25 (2.13–3.25), flw = 2.86 (2.00–3.25), FW/HW = 0.38 (0.31– 0.39), ch/o = 0.11 (0.09–0.14), prorb = damaged (0.84–1.11), rcorb = damaged (0.45– 0.68), vb = 0.56 (0.38–0.61), dcl = 0.45 (0.40–0.53), presctl = 0.55 (0.40–0.57), sctl = 1.15 (1.13–1.25), sterno = damaged (0.56–0.93), orbito = 1.71 (1.43–2.20), dcp = 0.27 (0.21– 0.29), sctlp = 0.91 (0.75–1.15), C = 2.68 (2.67–3.11), 4c = 0.85 (0.71–0.83), 4v = 1.85 (1.61– 1.75), 5x = 1.48 (1.18–1.64), ac = 5.30 (4.71–6.60), M = 0.55 (0.35–0.50), C3F = 1.00 (1.00).

Type specimens

Holotype male ( SCAU, No. 124820), China: Er’ pu, Lvchun , Yunnan, 22°48′N, 102°14′E, altitude 560 m, 28 October 2016, ex tree trunk, HW Chen GoogleMaps . Paratypes: China: 18 males, two females (eight males in KIZ, Nos. 0088157–64; 10 males, two females in SCAU, Nos. 124821–32), ex tree trunks and tussock, HW Chen, JJ Gao, same data as holotype GoogleMaps .

Etymology

The name, pertaining to the type locality, means ‘green spring’.

Distribution

China (Yunnan).