Stegana (Oxyphortica) mengwan 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 : 1964-1966

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-FFCD-FFEA-0526-807DFE90FD7F
treatment provided by	Felipe
scientific name	Stegana (Oxyphortica) mengwan Wang and Chen
status	sp. nov.

Treatment

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

( Figures 3 View Figure 3 (c), 4(g), 6(c) and 14).

Diagnosis

This species is similar to S. (O.) maichouensis in the shape of aedeagus, but can be distinguished by the surstylus only with one apical prensiseta ( Figure 14 View Figure 14 (a, b)); gonopods laterally protruded to base of surstyli, anteromedially tri- to quadripartite ( Figure 14 View Figure 14 (b)). The 9.2% interspecific genetic distance to S. (O). triodonta sp. nov. is one of the smallest interspecific distances ascertained within this subgenus; see under that species.

Description

Clypeus brown to dark brown. Palpus yellow. Mesoscutum brownish yellow, brown posteriomedially, with two pairs of thin, indistinct, brown longitudinal stripes sublaterally ( Figure 4 View Figure 4 (g)). Scutellum dark brown, yellow along margin. Katepisternum yellow, sometimes slightly brownish above. Wing yellowish, brownish anterodistally ( Figure 3 View Figure 3 (c)). Abdominal tergites: 1st yellow; 2nd yellow medially, dark brown laterally, anteromedially with one small brown patch; 3rd and 5th yellow on anterior margins, with broad dark brown, medially and laterally protruded bands on posterior margin; 6th tergite yellow medially, dark brown laterally ( Figure 6 View Figure 6 (c)). Sternites yellow in male, dark brown to black in female. Male terminalia: Epandrium with pubescence and setae, prominent on posterolateral corners ( Figure 14 View Figure 14 (a)). Cercus lacking pubescence ( Figure 14 View Figure 14 (a)). Surstylus with several setae distally, one very long ( Figure 14 View Figure 14 (a, b)). Parameres absent ( Figure 14 View Figure 14 (c, d)). Aedeagus sclerotized, haired along peristome, mediolaterally protruded to base of hypandrium ( Figure 14 View Figure 14 (c, d)).

Measurements

BL = 3.00 mm in holotype (range in four males and five females paratypes: 2.60– 2.97 mm in males, 3.24–3.69 mm in females), ThL = 1.47 mm (1.23–1.47 mm in males, 1.40–1.63 mm in females), WL = 2.33 mm (1.83–2.50 mm in males, 2.47–2.80 mm in females), WW = 1.07 mm (0.93–1.17 mm in males, 1.10–1.27 mm in females), arb = 6/ 4 (5–7/3–5), avd = 0.91 (0.64–0.87), adf = 1.83 (1.83–3.60), flw = 1.83 (1.67–2.80), FW/ HW = 0.37 (0.37–0.54), ch/o = 0.10 (0.08–0.13), prorb = 1.13 (0.91–1.24), rcorb = 0.63 (0.56–0.76), vb = 0.58 (0.38–0.60), dcl = 0.58 (0.37–0.56), presctl = 0.58 (0.40–0.60), sctl = damaged (0.94–1.17), sterno = 0.88 (0.79–0.95), orbito = 1.33 (1.33–2.00), dcp = 0.30 (0.23–0.31), sctlp = 0.93 (0.79–1.14), C = 2.61 (2.37–3.20), 4c = 0.86 (0.73–1.00), 4v = 1.94 (1.68–2.04), 5x = 1.82 (1.18–1.70), ac = 5.17 (4.00–6.00), M = 0.56 (0.44–0.63), C3F = 1.00 (0.78–1.00).

Type specimens

Holotype males ( SCAU, No. 124 819), China: Husa, Longchuan , Yunnan, altitude 1200 m, 20 August 2016, ex tussock, HW Chen . Paratypes, China: three males, 11 females ( SCAU, Nos. 111 314–27), HW Chen, L Gong, YQ Liu, same data as holotype; one male, three females ( KIZ, Nos. 0090503–06), Botanic Garden, Ruili, Yunnan, 24°1′12 ʹ ’N, 97°51′22 ʹ ’N, altitude 1170 m, 21–22 August, 2016, ex tussock, HW Chen, L Gong, YQ Liu .

Etymology

The name means ‘Sunlit place’ in the language of the Dai nationality in Yunnan, PR China.

Distribution

China (Yunnan).