Stegana (Steganina) sphaerica, 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 : 2010-2012

Stegana (Steganina) sphaerica sp. nov.

( Figure 10 )

Diagnosis

This species is similar to S. eurystoma sp. nov. in the cercus pubescent and the surstylus without prensiseta and serrated, minute processes on outer surface ( Figure 10A ), can be differentiated from it by having the hypandrium with two expanded processes

per inner side ( Figure 10C ), the dorsal projection of gonopods slender and acute ( Figure 10F ), the aedeagus with serrated, minute processes ( Figure 10C ).

Description

Frons brown to dark brown, lacking minute setulae. Fronto-orbital plate brownish yellow, Pedicel mostly yellow; first flagellomere brown. Face black on upper twothirds, yellow on lower margin. Clypeus brown medially, yellow laterally. Scutum black medially, brownish yellow laterally. Katepisternum brownish on anterior corner. Basisternum nearly brown. Scutellum brown to black. Fore femur with one row of four or five suberect setae on ventral surface. Abdominal tergites brown to black. Sternites dark brown, slightly wider than length. Male terminalia: tenth sternite bilobate medially ( Figure 10B ). Hypandrium slightly roundly expanded anteromedially ( Figure 10C ). Paramere indistinguishable, with five or six sensilla ( Figure 10C, D ). Aedeagus broadened distally, with pubescence anteromedially on opening ( Figure 10C, D ).

Measurements

BL = 2.43 mm in holotype (range in five ♂ and five ♀ paratypes: 2.23–2.87 in ♂, 2.92–4.20 in ♀), ThL = 1.27 mm (1.17–1.53 in ♂, 1.40–2.12 in ♀), WL = 2.07 mm (1.73–2.27 in ♂, 2.52–2.92 in ♀), WW = 1.07 mm (0.87–1.07 in ♂, 1.00– 1.32 in ♀), arb = 14 / 3 (12–14 / 3–5), avd = 0.80 (0.67–0.88), adf = 2.50 (1.60–3.33), flw = 2.00 (1.60–2.33), FW / HW = 0.33 (0.30–0.59), ch / o = 0.27 (0.19–0.33), prorb = 1.31 (0.71–1.40), rcorb = 0.77 (0.69–0.88), vb = 0.50 (0.40–0.63), dcl = 0.40 (0.29–0.60), presctl = 0.60 (0.23–0.75), sctl = 2.00 (1.57–2.17), sterno = 0.50 (0.40–0.58), orbito = 2.20 (1.25–2.50), dcp = 0.42 (0.30–0.44), sctlp = 1.40 (1.17–1.80), C = 1.89 (1.75–2.05), 4c = 1.27 (0.94–1.46), 4v = 2.93 (1.47–2.46), 5x = 1.22 (1.50–2.40), ac = 19.00 (16.00–21.59), M = 0.73 (0.53–0.75), C3F = 0.68 (0.63–0.76).

Type material

Holotype ♂ ( SCAU, No. 121313), CHINA: Mengla, Xishuangbanna , Yunnan, altitude 800 m, 17 April 2007, HW Chen . Paratypes: 24 ♂, eight ♀ (three ♂ and 3 three ♀ in KIZ; 21 ♂ and five ♀ in SCAU, Nos 121314–40), altitude 600–800 m, 17–24 April 2007, 11 April 2010, HW Chen, JJ Gao, Y Su, L Wang, L Wu, F Zhao ; one ♂ ( SCAU, No. 121341), Yixiang, Puer , Yunnan, altitude 1000 m, 15 April 2002, HW Chen ; three ♂, five ♀ ( SCAU, Nos. 121342–49), Jianfengling, Ledong , Hainan, altitude 700 m, 16 May 2005, tussock, HL Cao, HW Chen, MF Xu .

Etymology

From the Latin word: sphaericus, referring to the hypandrium with the globose processes.

Distribution

China (Hainan, Yunnan) .

Figures

Figure 10. Stegana (Steganina) sphaerica 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.