Stegana (Steganina) setivena, Wang & Gao & Chen, 2013

Wang, Le, Gao, Jian-Jun & Chen, Hong-Wei, 2013, Ten new species of the subgenus Steganina (Diptera: Drosophilidae: Stegana) from southern China, Journal of Natural History (J. Nat. Hist.) 47 (29 - 30), pp. 1993-2013 : 2009-2010

Stegana (Steganina) setivena sp. nov.

( Figure 9 )

Diagnosis

This species is similar to S. cylindrica sp. nov. in the some characters of male terminalia, can be differentiated from it by having the surstylus with numerous serrated, minute processes on outer surface ( Figure 9B ), the dorsal projection of gonopods slightly roundly expanded ( Figure 9E, F ).

Description

Frons black, lacking minute setulae. Fronto-orbital plate black above, brownish yellow below. Pedicel yellow; first flagellomere dark brown. Face black on upper two-thirds, yellow on lower margin. Clypeus yellow. Scutum black medially, brownish yellow laterally. Basisternum yellow. Scutellum black basally, yellow distally. Wing brown anteriorly, paler posteriorly, dark brown on all crossveins. Fore femur with one row of three or four suberect setae on ventral surface. Abdominal tergites black. Sternites dark brown, broadened, wider than length. Male terminalia: cercus lacking pubescence ( Figure 9A ). Surstylus with one prensiseta on apical margin ( Figure 9A ). Tenth sternite slightly expanded medially ( Figure 9C ). Hypandrium slightly roundly expanded anteromedially ( Figure 9D ). Paramere distinctly protruded and with two sensilla ( Figure 9C, D ). Aedeagus broadened distally, with pubescence anteromedially and sporadic, minute processes ( Figure 9D, E ).

Measurements

BL = 3.28 mm in holotype (range in five ♂ and five ♀ paratypes: 2.84–3.32 in ♂, 3.2–3.64 in ♀), ThL = 1.28 mm (1.32–1.68 in ♂, 1.50–1.84 in ♀), WL = 2.64 mm (2.28–2.80 in ♂, 2.36–2.96 in ♀), WW = 1.16 mm (1.00– 1.20 in ♂, 1.00– 1.40 in ♀), arb = 7 / 4 (7–10 / 4–6), avd = 0.83 (0.78–0.90), adf = 1.20 (1.14–1.67), flw = 2.17 (1.71–2.17), FW / HW = 0.42 (0.35–0.47), ch / o = 0.14 (0.15–0.23), prorb = 1.07 (0.89–1.15), rcorb = 0.67 (0.69–1.00), vb = 0.31 (0.36–0.55), dcl = 0.43 (0.24–0.56), presctl = 0.48 (0.45–0.88), sctl = 1.40 (1.65–1.88), sterno = 0.44 (0.42–0.75), orbito = 1.80 (1.43–2.25), dcp = 0.21 (0.14–0.29), sctlp = 2.00 (1.40–2.11), C = 1.76 (1.80–2.03), 4c = 1.23 (1.06–1.28), 4v = 1.90 (1.50–1.92), 5x = 1.20 (1.27–1.82), ac = 18.50 (11.00–18.50), M = 0.40 (0.47–0.64), C3F = 0.79 (0.69–0.82).

Type material

Holotype ♂ ( SCAU, No. 121295), CHINA: Mengla, Xishuangbanna , Yunnan, altitude 570 m, 22 April 2007, HW Chen . Paratypes: 15 ♂, three ♀ (three ♂ in KIZ; twelve ♂ and three ♀ in SCAU, Nos 121296–310), Mengla, Xishuangbanna , Yunnan, 570–800 m, 16–24 April 2007, 10 April 2010, HW Chen, JJ Gao, YR Su, L Wang, L Wu, F Zhao ; one ♂, one ♀ ( SCAU, Nos 121311, 12), Puer , Yunnan, 22 ◦ 47 ′ N, 101 ◦ 02 ′ E, altitude 1264 m, 19 April 2010, L Wang .

Etymology

A combination of the Latin words: seta and vena, referring to the basal section of R 4+5 and M 1 vena with several setae.

Distribution

China (Yunnan).

Figures

Figure 9. Stegana (Steganina) setivena sp. nov., male terminalia: (A) epandrium, cercus and surstylus; (B) surstylus; (C) 10th sternite; (D, E) hypandrium, paramere(s), aedeagus and aedeagal apodeme; (F, G) gonopods. Scale bars: 0.1 mm.