Stegana (Steganina) lingnanensis, Cheng, Gao & Chen, 2009

Cheng, Yu, Gao, Jian-Jun & Chen, Hong-Wei, 2009, Stegana ornatipes species group from the Oriental Region (Diptera: Drosophilidae), Zootaxa 2216 (1), pp. 37-48 : 42

Stegana (Steganina) lingnanensis sp. nov.

( Figs 11–14 )

Specimens examined. Holotype: ♂ ( SCAU, No. 120635), CHINA: Huolushan, Guangzhou , Guangdong, 23°10ʹ N, 113°22ʹ E, altitude 130 m, 5.iv.2005, on tree trunk, MF Xu . Paratypes: CHINA: 2♂ 1♀ ( SCAU, Nos 120636-38), same data as holotype .

Diagnosis. Aedeagus broadened, slightly bifid medially, with 1 pair of small projections and pubescence ( Fig. 14 ); gonopods with 1 acute projection medially ( Fig. 14 ); 10th sternite with 1 pair of asymmetric projections sublaterally ( Fig. 13 ).

Description. Male and female: Pedicel grey-yellow; first flagellomere mostly black. Palpus yellow basally, black distally. Katepisternum dark brown on upper part, white on lower part. Legs brown to dark brown, white on basal parts of all femora and distal part of mid and hind tibiae, yellow-brown on 1st to 4th tarsomeres of all legs. Fore femur with 4 setae on distal half of ventral surface. Male terminalia: Epandrium with approximately 21 setae near posterior to ventral margin on each body-side ( Fig. 11 ). Surstylus broadened submedially ( Fig. 12 ). Cercus with sporadic pubescence ( Fig. 11 ). Plate between hypandrium and aedeagus lacking pubescence ( Fig. 14 ).

Measurements: BL = 2.72 mm in holotype (range in 2♂ 1♀ paratypes: 2.66–3.12 mm in ♂, 2.53 mm in ♀); ThL = 1.41 mm (1.38–1.44 mm in ♂, 1.31 mm in ♀); WL = 2.30 mm (2.28–2.40 mm in ♂, 2.23 mm in ♀); WW = 1.28 mm (1.22–1.28 mm in ♂, 1.20 mm in ♀). Indices: arb = 8/6 (8/7), avd = 0.92 (0.80–0.86), adf = 1.08 (1.08–1.25), flw = 1.83 (1.69–1.92), FW/HW = 0.37 (0.37–0.41), ch/o = 0.07 (0.07–0.08), prorb = 1.08 (1.04), rcorb = 0.68 (0.67–0.74), vb = 0.26 (0.19–0.23), dcl = 0.39 (0.43–0.46), presctl = 0.63 (0.59–0.65), sctl = 1.36 (1.31–1.45), sterno = 0.94 (0.92), orbito = 2.43 (1.88–2.14), dcp = 0.19 (0.18–0.21), sctlp = 1.42 (1.15– 1.29), C = 1.94 (1.72–1.86), 4c = 1.26 (1.31–1.44), 4v = 1.78 (1.77–1.92), 5x = 1.15 (1.08–1.15), ac = 8.50 (8.50–9.00), M = 0.56 (0.52–0.56), C3F = 0.66 (0.57–0.65).

Distribution. China (Guangdong).

Etymology. Pertaining to the type locality.

Figures

FIGURES 11–14. Stegana (Steganina) lingnanensis sp. nov., ♂: 11. Epandrium, surstylus and cercus (lateral view); 12. surstylus (frontal view); 13. 10th sternite; 14. hypandrium, gonopods, aedeagus and aedeagal apodeme (ventral view) (For abbreviations see Figures 1–6. Scale bars: 0.1 mm).