Scaptodrosophila helvpecta, 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 : 127-128

Scaptodrosophila helvpecta sp. n.

Figs 5A, C, E , 11

Holotype.

♂ (SCAU, No. 110957): CHINA: Wuzhishan, Hainan, 18°48'N, 109°19'E, alt. 440 m, 21.iv.2007, HZ Cao, T Li.

Paratypes.

CHINA: 3♀ (SCAU, Nos 110958-60), same data as holotype; 2♂, 2♀ (SCAU, Nos 110961-64), Menglun, Mengla, Yunnan, alt. 570 m, 12.iv.2010, YR Su, L Wang, L Wu; 5♂, 3♀ (SCAU, Nos 110965-72), Guanlei, Mengla, Yunnan, 21°38'N, 101°16'E, alt. 562 m, 20.iv.2016, J Huang, Y Liu, YL Wang, L Zhu; 2♂ (SCAU, Nos 110973, 74), Likan, Ximeng, Yunnan, 22°39'N, 99°36'E, alt. 844 m, 1.v.2016, J Huang, YQ Liu.

Diagnosis.

This species is similar to S. fuscilimba sp. n. in the pattern on the abdomen tergites and the shape of male terminalia, but can be distinguished from the latter by having the tergite VI yellowish brown with dark brown caudal bands (Fig. 5C, E ); paramere small, finger like in lateral view (Fig. 11D ); aedeagus inverted triangle shaped and round dorsally in lateral view (Fig. 11D ).

Description.

(♂, ♀) Head (Fig. 5A ): Frons yellowish brown. Pedicel yellowish brown; first flagellomere grayish, margins black. Facial carina yellowish, long, narrow, and prominent, 1/2 long as face.

Thorax (Fig. 5C, E ): Mesonotum yellowish brown. Acrostichal setulae in ca. ten regular rows. Scutellum yellowish brown. Pleura yellowish brown.

Abdomen (Fig. 5C, E ): Tergites II to VI yellowish brown with dark brown caudal bands.

Male terminalia (Fig. 11A-D ): Epandrium with ca. 14 setae near posterior and ventral margins per side. Surstylus with approximately nine fine peg-like prensisetae. Hypandrium lacking pubescence. Paramere with five sensilla basally. Gonopods elliptically expanded in lateral view. Aedeagus lacking pubescence.

Female terminalia (Fig. 11E ): Oviscapt with five long subapical trichoid ovisensilla, and 12 ovisensilla along ventral margin.

Measurements [holotype ♂ (range in 5♂, 5♀ paratypes), in mm]: BL = 1.73 (1.83-2.07, 1.53-2.00), ThL = 0.83 (0.76-0.90, 0.76-0.90), WL = 1.63 (1.53-1.97, 1.43-1.67), WW = 0.73 (0.67-0.77, 0.60-0.70).

Indices: arb = 3/2 (3/2), avd = 0.71 (0.50-1.00), adf = 2.33 (1.75-2.67), flw = 2.17 (1.38-2.00), FW/HW = 0.39 (0.41-0.57), ch/o = 0.10 (0.10-0.12), prorb = 0.78 (0.57-1.00), rcorb = 0.22 (0.25-0.38), vb = 0.29 (0.29-0.50), dcl = 0.29 (0.29-0.42), presctl = 0.43 (0.33-0.50), sctl = 1.00 (0.93-1.20), sterno = 0.50 (0.33-0.60), orbito = 0.50 (0.38-0.50), dcp = 0.32 (0.25-0.40), sctlp = 0.76 (0.67-1.14), C = 1.87 (1.63-2.08), 4c = 1.15 (1.18-1.50), 4v =2.08 (2.00-2.45), 5x = 3.33 (2.33-3.33), ac = 3.00 (2.60-3.20), M = 0.77 (0.64-0.90), C3F = 0.60 (0.67-0.77).

Etymology.

A combination of the Latin words helvus and pectus, referring to the yellow thorax.

Distribution.

China (Hainan, Yunnan).

Figures

Figure 5. Frontal, dorsal, and lateral views of male. Scaptodrosophila helvpecta sp. n. (A, C, E); S. longispinata sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 11. Scaptodrosophila helvpecta 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.