Scaptodrosophila platyrhina, Lin & Chen, 2020

Lin, Yong & Chen, Hong-Wei, 2020, The genus Scaptodrosophila Duda (Diptera, Drosophilidae), part III: the riverata species group from China, with morphological and molecular evidence for five new species, ZooKeys 937, pp. 139-162 : 139

Scaptodrosophila platyrhina sp. nov.

Figs 4B, D, F , 10

Material examined.

Holotype. China: ♂ (SCAU, No. 126838), Menglun, Mengla , Yunnan, 21°41'N, 101°25'E, alt. 680 m, 17.iv. 2007, HW Chen . Paratypes. China: 4♂, 7♀ (SCAU, Nos 126839-47), Menglun, Mengla , Yunnan, 21°41'N, 101°25'E, alt. 680 m, 17.iv.2007, HW Chen ; 1♂ (SCAU, No. 127161), Niuluohe, Jiangcheng , Yunnan, alt. 800 m, 22°30'N, 101°34'E, 21.iv.2010, HW Chen ; 1♂ (SCAU, No. 110923), Guanlei, Mengla , Yunnan, 21°38'N, 101°10'E, alt. 620 m, 21.iv.2016, YQ Liu ; 2♂, 2♀ (SCAU, Nos 110924, 26-28), Menglun, Mengla , Yunnan, 24°41'N, 101°25'E, alt. 554 m, 12.iv.2010, HW Chen .

Diagnosis.

Facial carina short; paramere finger-like in lateral view, with ca 4 sensillae basally (Fig. 10C, D ); aedeagus bifid apically (Fig. 10C, D ); gonopods undeveloped (Fig. 10C, D ).

Description.

Head (Fig. 4B ): Frons yellowish brown. Pedicel yellowish brown. First flagellomere yellowish. Facial carina hazel, short, 1/3 length as face.

Thorax (Fig. 4D, F ): Mesonotum and scutellum yellowish. Acrostichal setulae in ca 8 regular rows. Halter hazel. Wings yellowish.

Abdomen (Fig. 4D, F ): Tergites yellowish.

Male terminalia: Epandrium with ca 11 setae near posterior margin and ventral corner per side (Fig. 10A, B ). Surstylus with ca 10 long, peg-like prensisetae on caudal margin, and ca 3 setae on outer surface (Fig. 10A, B ). Hypandrium glabrous (Fig. 10C, D ).

Female terminalia (Fig. 10E ): Oviscapt with 3 long subapical trichoid ovisensilla, ca 21 peg-like ovisensilla on each side on ventral margins and 5 trichoid ovisensilla on dorsal.

Measurements [holotype ♂ (range in 5♂, 5♀), in mm]: BL = 2.27 (2.00-2.33, 1.93-2.13), THL = 1.13 (0.80-1.07, 1.00-1.07), WL = 2.47 (2.20-2.40, 2.20-2.40), WW = 0.93 (0.80-0.93, 0.80-0.93).

Indices: arb = 2/1 (2/1), avd = 0.60 (0.60-0.80), adf = 2.50 (2.00-2.50), flw = 2.00 (2.00), FW/HW = 0.43 (0.41-0.45), ch/o = 0.08 (0.08-0.09), prorb = 0.83 (0.40-1.00), rcorb = 0.50 (0.33-0.60), vb = 0.40 (0.40-0.50), dcl =0.71 (0.50-0.73), presctl = 0.43 (0.40-0.50), sctl = 1.00 (0.85-1.27), sterno = 0.89 (0.70-0.89), orbito = 0.67 (0.67), dcp = 0.36 (0.31-0.36), sctlp = 1.00 (0.71-1.00), C = 2.86 (2.64-2.79), 4c = 1.00 (0.93-1.08), 4v = 2.36 (2.00-2.46), 5x = 1.67 (1.50-1.80), ac = 2.80 (2.80-3.00), M = 0.71 (0.64-0.71), C3F = 0.36 (0.29-0.36).

Etymology.

A combination of the Latin words: " platys " + " rhinos ", referring to the flat carina.

Distribution.

China (Yunnan).

Figures

Figure 4. Head, mesonotum, scutellum, pleura and abdomen of male. A, C, E S. abdentata sp. nov. B, D, F S. platyrhina sp. nov. Scale bars: 0.5 mm.

Figure 10. Scaptodrosophila platyrhina sp. nov. ♂. A Epandrium, surstylus and cercus (posterior view) B epandrium, surstylus and cercus (lateral view) C hypandrium, aedeagus, aedeagal apodeme, paramere and gonopods (ventral view) D hypandrium, aedeagus, aedeagal apodeme, paramere and gonopods (lateral view) E oviscapt (lateral view). Scale bars: 0.1 mm.