Stegana (Steganina) langufoliacea, Wu, Liang, Gao, Jian-Jun & Chen, Hong-Wei, 2010

Wu, Liang, Gao, Jian-Jun & Chen, Hong-Wei, 2010, The Stegana (Steganina) biprotrusa species group from the Oriental Region (Diptera: Drosophilidae), Zootaxa 2721, pp. 47-54 : 51-52

Stegana (Steganina) langufoliacea sp. nov.

( Figs 16–22 )

Diagnosis. This species is very similar to S. acantha sp. nov. in the characters of male terminalia, but can be differentiated from it by having the articulating-to-aedeagus plate weakly sclerotized, lacking serrate processes ( Figs 19, 20 ), the aedeagus bifurcated form medial portion: ventral part not divided: dorsal part laterally with several serrate processes, apically roundly convex in ventral view ( Figs 19, 20 ).

Description. Male: Pedicel almost black, yellow medially. Mesonotum black, with yellowish brown patches posteolaterally. Basisternum black. Scutellum black, pale at tip. Fore femur distally with 6 thick setae on anteroventral. All abdominal sternites brown, 2.5 times as broad as wide. Male terminalia: Epandrium with approximately 19 setae near posterior margin on each body-side ( Fig. 16 ). Hypandrium slightly concave anteromedially ( Fig. 19 ). Aedeagus slightly sclerotized ( Figs 19, 20 ). Gonopods strongly sclerotized, apically round and slightly curved dorsad, with numerous, minute serrate processes ( Figs 21, 22 ).

Measurements. BL = 4.16 mm in the holotype (4.15 mm in 13 paratype), THL = 1.86 mm (2.09 mm), WL = 3.12 mm (3.03 mm), WW = 1.60 mm (1.56 mm), arb = 9/4 (8/4), avd = 0.58 (0.55), adf = 1.20 (1.10), flw = 1.50 (1.40), FW/HW = 0.33 (0.42), ch/o = 0.27 (0.29), prorb = 1.20 (damaged), rcorb = 0.80 (0.72), vb = 0.59 (0.56), dc1 = 0.36 (0.45), presct1 = 0.73 (0.45), sct1 = 1.80 (1.80), sterno = 0.92 (0.91), orbito = 1.50 (1.13), dcp = 0.18 (0.20), sct1p = 2.20 (2.00), C = 1.93 (1.93), 4c = 1.30 (1.19), 4v = 2.18 (1.68), 5x = 2.00 (2.00), ac = 21.50 (17.60), M = 0.61 (0.59), C3F = 0.82 (0.78).

Specimen examined. Holotype: 3 (SCAU, No. 120899), CHINA: Maoershan, Guilin, Guangxi, altitude 700 m, 24.ix.2006, on tree trunk, JJ Jiang. Paratype: 13 (SCAU, No. 120900), same data as holotype.

Distribution. China (Guangxi).

Etymology. A combination of the Latin words: langu- and foliacea, referring to the articulating-to-aedeagus plate weakly sclerotized.

Figures

FIGURES 16 – 22. Stegana (Steganina) langufoliacea sp. nov., 3: 16. Epandrium, cercus and surstylus; 17. surstylus (ventral view); 18. 10 th sternite; 19, 20. hypandrium, aedeagus, articulating-to-aedeagus plate (ap aed) and aedeagal apodeme; 21, 22. gonopods (for orientation and abbreviations see figs 1 – 6; scale bars: 0.1 mm).