Scaptodrosophila nigrolimbata, 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 : 130

Scaptodrosophila nigrolimbata sp. n.

Figs 6A, C, E , 13

Holotype.

♂ (SCAU, No. 110989): CHINA: Likan, Ximeng, Yunnan, alt. 844 m, 1.v.2016, J Huang, YQ Liu.

Paratype.

CHINA: 1♂ (SCAU, No. 110990), same data as holotype.

Diagnosis.

Surstylus with eight very large peg-like prensisetae (Fig. 13A, B ); paramere triangle shaped in lateral view, with a small projection subbasally (Fig. 13D ); gonopods concave medially in lateral view, with a small projection distally (Fig. 13D ); aedeagus triangle shaped in lateral view (Fig. 13D ).

Description.

(♂) Head (Fig. 6A ): Frons brown. Pedicel yellowish brown; first flagellomere yellowish brown, margins black. Facial carina yellowish, long, narrow, and flat, as 1/2 length as face.

Thorax (Fig. 6C, E ): Mesonotum yellowish brown. Acrostichal setulae in ca. eight regular rows. Scutellum yellowish brown. Pleura yellowish brown.

Abdomen (Fig. 6C, E ): Tergites II to VI yellow with dark brown caudal bands, the caudal band on tergites II to V interrupted medially.

Male terminalia (Fig. 13 ): Epandrium with ca. 23 setae near posterior and ventral margins per side. Hypandrium lacking pubescence. Paramere with five sensilla medially. Aedeagus lacking pubescence.

Measurements [holotype ♂ (range in 1♂ paratypes), in mm]: BL = 2.00 (2.07), ThL = 1.07 (1.17), WL = 2.06 (2.20), WW = 0.86 (0.90).

Indices: arb = 3/2 (3/2), avd = 1.14 (0.89), adf = 2.33 (3.00), flw = 2.33 (2.67), FW/HW = 0.45 (0.49), ch/o = 0.09 (0.08), prorb = 1.00 (1.11), rcorb = 0.38 (0.44), vb = 0.40 (0.29), dcl = 0.39 (0.35), presctl = 0.50 (0.55), sctl = 0.94 (damaged), sterno = damaged (damaged), orbito = 0.40 (0.50), dcp = 0.23 (0.33), sctlp = 0.890 (0.91), C = 3.33 (3.31), 4c = 0.71 (0.76), 4v = 1.59 (1.76), 5x = 1.60 (1.80), ac = 2.00 (2.17), M = 0.47 (0.53), C3F = 0.33 (0.46).

Etymology.

A combination of the Latin words nigritus and limbus, referring to the margins of tergites being nearly black.

Distribution.

China (Yunnan).

Figures

Figure 6. Frontal, dorsal, and lateral views of male. Scaptodrosophila nigrolimbata sp. n. (A, C, E); S. trivittata sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 13. Scaptodrosophila nigrolimbata 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). Scale bars: 0.1 mm.