Stegana (Steganina) planiceps, 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 : 2005-2007

Stegana (Steganina) planiceps sp. nov.

( Figure 7 )

Diagnosis

This species is similar to S. cylindrica sp. nov. in the cercus lacking pubescence and the shapes of paramere, can be differentiated from it by having the dorsal projection of gonopods strongly protruded and lacking serrated, minute processes ( Figure 7C, D ).

Description

Frons nearly dark brown, lacking minute setulae. Fronto-orbital plate brown. Pedicel yellow; first flagellomere mostly brown. Face dark brown on upper two-thirds, yellow on lower margin. Clypeus brownish medially, yellow laterally. Scutum brown to dark brown medially, brownish yellow laterally. Basisternum yellow. Scutellum dark brown. Wing brown anteriorly, yellowish posteriorly, slightly dark on all crossveins. Fore femur with one row of three or four suberect setae on ventral surface. Abdominal tergites black medially, yellow laterally. Sternites yellow, much broadened, wider than length. Male terminalia: surstylus without prensiseta and minute processes on outer surface ( Figure 7A ). Tenth sternite strongly broadened ( Figure 7B ). Hypandrium roundly expanded anteromedially ( Figure 7C ). Aedeagus round distally in ventral view, lacking pubescence medially ( Figure 7C, D ).

Measurements

BL = 2.44 mm in holotype (range in five ♂ and three ♀ paratypes: 1.83–2.46 in ♂, 2.80–3.24 in ♀), ThL = 1.33 mm (1.00– 1.40 in ♂, 1.44–1.52 in ♀), WL = 1.87 mm (1.33–1.84 in ♂, 2.08–2.44 in ♀), WW = 1.07 mm (0.70–0.97 in ♂, 1.00– 1.16 in ♀), arb = 6 / 4 (6–8 / 4–6), avd = 0.71 (0.56–1.38), adf = 1.17 (1.00–1.86), flw = 2.00 (1.57–2.50), FW / HW = 0.48 (0.34–0.47), ch / o = 0.35 (0.19–0.31), prorb = 1.14 (0.60–1.20), rcorb = 0.71 (0.46–1.29), vb = 0.40 (0.30–0.50), dcl = 0.32 (0.25–0.47), presctl = 0.56 (0.40–0.67), sctl = 1.71 (1.67–2.27), sterno = 0.58 (0.43–0.85), orbito = 1.60 (1.50–2.20), dcp = 0.20 (0.13–0.20), sctlp = 1.67 (1.67–2.43), C = 2.91 (1.60–2.53), 4c = 0.73 (0.82–1.42), 4v = 2.27 (1.68–2.19), 5x = 1.50 (1.25–2.13), ac = 22.00 (16.00–26.00), M = 0.82 (0.41–0.67), C3F = 0.71 (0.68–0.82).

Type material

Holotype ♂ ( SCAU, No. 121266), CHINA: Jiangfengling, Ledong , Hainan, 18 ◦ 41 ′ N, 108 ◦ 52 ′ E, altitude 940 m, 16 May 2005, tussock, MF Xu . Paratypes: one ♂ ( SCAU, No. 121267), same data as holotype ; four ♂, two ♀ (two ♂ in KIZ; two ♂ and two ♀ in SCAU, Nos. 121268–71), Mount Wuzhi , Hainan, 18 ◦ 48 ′ N, 109 ◦ 19 ′ E, altitude 440 m, 20 April 2007, HZ Cao, T Li ; seven ♂, three ♀ (three ♂ in KIZ; four ♂ and three ♀ in SCAU, Nos. 121272–78), Wangtianshu, Mengla, Xishuangbanna , Yunnan, altitude 570 m, 22–24 April 2007, HW Chen, JJ Gao .

Etymology

A combination of the Latin words: planus + ceps referring to the gonopods being flat apically.

Distribution

China (Hainan, Yunnan) .

Figures

Figure 7. Stegana (Steganina) planiceps sp. nov., male terminalia: (A) epandrium, cercus and surstylus; (B) 10th sternite; (C, D) hypandrium, paramere(s), gonopods, aedeagus and aedeagal apodeme. Scale bars: 0.1 mm.