Scaptodrosophila sinuata, 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 sinuata sp. nov.

Figs 5B, D, F , 12

Material examined.

Holotype. China: ♂ (SCAU, No. 110939), Laobiangou, Benxi , Liaoning, 41°04'N, 124°30'E, alt. 575 m, 21.vi.2018, Y Lin . Paratypes. China: 2♂ (SCAU, Nos 110936, 37), Dayangcha, Kuangdian , Liaoning, 41°01'N, 124°37'E. alt. 485 m, 23.vi.2018, L Gong ; 2♂ (SCAU, Nos 110938, 40), Laobiangou, Benxi , Liaoning, 41°04'N, 124°30'E, alt. 575 m, 21.vi.2018, Y Lin ; 3♂ (SCAU, Nos 110941, 42, 43), Guojiapuzi, Kuangdian , Liaoning, 40°46'N, 124°45'E. alt. 342 m, 26.vi.2018, L Gong .

Diagnosis.

Paramere quadrangle-shaped in lateral view, with ca 3 sensillae medially (Fig. 12A, B ); gonopods large, with many finely acanthoid processes (Fig. 12C, D ); aedeagus beanpod-shaped in lateral view (Fig. 12C, D ).

Description.

(♂) Head (Fig. 5B ): Frons yellowish brown. Pedicel yellow. First flagellomere yellowish brown. Arista weak. Facial carina yellowish, developed, 1/2 length as face.

Thorax (Fig. 5D, F ): Mesonotum and scutellum yellowish. Acrostichal setulae in ca 8 irregular rows. Halter yellowish brown. Wings light brown and appreciably hyaline.

Abdomen (Fig. 5D, F ): Tergites yellowish.

Male terminalia (Fig. 12 ): Epandrium with ca 23 setae near posterior margin and ventral corner on each side (Fig. 12A, B ). Surstylus broad, with ca 12 fine peg-like prensisetae on caudal margin, and numerous setae on outer and inner surface (Fig. 12A, B ). Hypandrium pubescent near paramedian setae (Fig. 12C, D ).

Measurements [holotype ♂ (range in 3♂), in mm]: BL = 2.36 (2.33-2.44), ThL = 0.978 (1.02-1.07), WL = 2.33 (2.07-2.30), WW = 0.99 (0.99-1.02).

Indices: arb = 2/1 (2/1), avd = 0.88 (0.67-0.88), adf = 0.97 (0.97-0.99), flw = 1.56 (1.51-1.62), FW/HW = 0.36 (0.35-0.37), ch/o = 0.12(0.11-0.13), prorb = 0.82 (0.95-0.98), rcorb = 0.50 (0.50-0.52), vb = 0.73 (0.47 -0.52), dcl =0.57 (0.71-0.72), presctl = 0.36 (0.42-0.44), sctl = 1.873 (1.62-1.72), sterno = 0.43 (0.41-0.43), orbito = 0.48 (0.48-1.07), dcp = 0.41 (0.40-0.42), sctlp = 0.77 (0.76-0.82), C = 3.79 (3.76-4.09), 4c = 0.59 (0.53-0.60), 4v =1.69 (1.72-1.80), 5x = 0.86 (0.86-0.95), ac =1.36 (1.35-1.71), M = 0.31 (0.29-0.32), C3F = 0.60 (0.56-0.58).

Etymology.

From the Latin word: " sinuatus ", referring to the paramere, which is curved subbasally.

Distribution.

China (Liaoning).

Figures

Figure 5. Head, mesonotum, scutellum, pleura and abdomen of male. A, C, E S. serrateifoliacea sp. nov. B, D, F S. sinuata sp. nov. Scale bars: 0.5 mm.

Figure 12. Scaptodrosophila sinuata 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). Scale bars: 0.1 mm.