Scaptodrosophila ventriobscurata, Liu & Chen, 2018

Liu, Yi-Qin & Chen, Hong-Wei, 2018, The genus Scaptodrosophila Duda part II: the coracina species group from East Asia, with morphological and molecular evidence (Diptera, Drosophilidae), ZooKeys 736, pp. 119-148 : 132-139

Scaptodrosophila ventriobscurata sp. n.

Figs 7A, C, E , 15

Holotype.

♂ (SCAU, No. 111095): CHINA: Xincheng, Yingjiang, Yunnan, 24°46'N, 98°10'E, alt. 963 m, 18.viii.2016, HW Chen.

Paratypes.

CHINA: 2♂, 4♀ (SCAU, Nos 110996-111001), same data as holotype; 1♂ (SCAU, No. 111002), Wangtianshu, Mengla, Yunnan, 21°37'N, 101°36'E, alt. 760 m, 13.iv.2010, YR Su; 2♂ (SCAU, Nos 111003, 04), Menglun, Mengla, Yunnan, 680 m, 11.iv.2010, L Wu; 1♂ (SCAU, No. 111005), Husa, Longchuang, Yunnan, 24°27'N, 97°45'E, alt. 1227m, 21.viii.2016, L Gong; 1♂ (SCAU, No. 111006), Arboretum, Ruili, Yunnan, 24°1'N, 97°51'E, alt. 1174 m, 22.viii.2016, L Gong.

Diagnosis.

Surstylus with four large setae (Fig. 15A, B ); cercus with six long peg-like prensisetae (Fig. 15A, B ); gonopods large, with an acute protection apically (Fig. 15C, D ); aedeagus rod-like, elliptically broadened apically (Fig. 15C, D ).

Description.

(♂, ♀) Head (Fig. 7A ): Frons yellowish brown. Pedicel yellowish brown; first flagellomere yellowish, margins black. Facial carina yellowish, 1/3 long as face.

Thorax (Fig. 7C, E ): Mesonotum yellowish brown. Acrostichal setulae in ca. eight to ten regular rows. Prescutellar setae small. Scutellum yellowish brown. Pleura yellowish, with a brown longitudinal stripe.

Abdomen (Fig. 7C, E ): Tergites II to V yellowish with broad black caudal bands, the caudal bands on tergites II and III narrowed medially; tergites VI black.

Male terminalia (Fig. 15A-D ): Epandrium with ca. 11 setae near posterior and ventral margins per side. Surstylus with 11 peg-like prensisetae, and pubes cence anterior. Hypandrium with pubescence. Paramere large, with seven sensilla subbasally.

Female terminalia (Fig. 15E ): Oviscapt very broadened apically, with a single apical trichoid ovisensillum, and 25 ovisensilla.

Measurements [holotype ♂ (range in 4♂, 4♀ paratypes), in mm]: BL = 2.33 (1.90-2.23, 2.33-2.50), ThL = 1.00 (0.83-1.33, 0.90-1.03), WL = 2.00 (1.63-1.87, 1.90-2.07), WW = 0.93 (0.73-0.97, 0.87-0.97).

Indices: arb = 4/2 (3-4/2), avd = 1.00 (0.83-0.86), adf = 2.00 (1.67-2.33), flw = 1.67 (1.50-2.00), FW/HW = 0.44 (0.39-0.49), ch/o = 0.10 (0.10-0.20), prorb = 0.80 (0.63-1.00), rcorb = 0.50 (0.50-0.71), vb = 0.43 (0.38-0.50), dcl = 0.69 (0.59-0.83), presctl = 0.31 (0.22-0.42), sctl = 0.94 (0.94-1.06), sterno = 0.80 (0.67-0.87), orbito = 0.60 (0.50-0.63), dcp = 0.43 (0.40-0.55), sctlp = 0.75 (0.75-1.00), C = 1.63 (1.50-2.00), 4c = 1.46 (1.14-1.70), 4v =2.31 (2.21-2.60), 5x = 2.50 (2.25-3.00), ac = 3.17 (2.67-3.00), M = 0.77 (0.79-0.91), C3F = 0.68 (0.63-0.73).

Etymology.

A combination of the Latin words ventris and obscuratus, referring to the black tergites.

Distribution.

China (Yunnan).

Figures

Figure 7. Frontal, dorsal, and lateral views of male. Scaptodrosophila ventriobscurata sp. n. (A, C, E); S. zebrina sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 15. Scaptodrosophila ventriobscurata sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively) E oviscapt (lateral view). Scale bars: 0.1 mm.