Scaptodrosophila serrateifoliacea, 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 serrateifoliacea sp. nov.

Figs 5A, C, E , 11

Material examined.

Holotype. China: ♂ (SCAU, No. 126826), Hesong, Menghai , Yunnan, 21°49'N, 100°06'E, alt. 1900 m, 11.iv. 2011, JM Lu, YR Su, ZF Shao, SJ Yan . Paratypes. China: 1♂ (SCAU, No. 126827), Hesong, Menghai , Yunnan, 21°50'N, 100°06'E, alt. 1900 m, 11.iv.2011, JM Lu, YR Su, ZF Shao, SJ Yan . 1♂ (SCAU, No. 110929), Mengdong, Cangyuan , Yunnan, 23°10'N, 99°13'E, alt. 1323 m, 6.v.2016, YQ Liu .

Diagnosis.

Paramere quadrangle-shaped in lateral view, with ca 3 sensillae medially (Fig. 11C, D ); gonopods developed, arm-shaped, with many finely acanthoid processes (Fig. 11C, D ); aedeagus beanpod-shaped in lateral view (Fig. 11C, D ).

Description.

(♂, ♀) Head (Fig. 5A ): Frons yellowish brown. Pedicel yellow. First flagellomere yellowish. Facial carina yellowish, short, 1/2 length as face.

Thorax (Fig. 5C, E ): Mesonotum and scutellum dark brown. Acrostichal setulae in ca 8 irregular rows. Halter yellowish brown. Wings hazel.

Abdomen (Fig. 5C, E ): First tergite and second tergite yellow. Third to sixth tergites brown.

Male terminalia: Epandrium with ca 19 setae near posterior margin and ventral corner on each side (Fig. 11A, B ). Surstylus broad, with ca 10 fine peg-like prensisetae on caudal margin, and numerous setae on outer and inner surfaces (Fig. 11A, B ). Hypandrium pubescent near paramedian setae (Fig. 11C, D ).

Female terminalia (Fig. 11E ): Oviscapt with 1 long subapical trichoid ovisensillum on ventral margins and densely covered with peg-like ovisensilla.

Measurements [holotype ♂ (range in 1♂, 1♀), in mm]: BL = 1.93 (2.22, 1.80), ThL = 0.93 (0.889, 1.00), WL = 2.13 (2.44, 2.13), WW = 0.87 (0.978, 0.93).

Indices: arb = 2/1 (2/1), avd = 0.67 (0.67-0.73), adf = 1.00 (1.09-1.50), flw = 1.33 (1.59-2.50), FW/HW = 0.45 (0.344-0.48), ch/o = 0.15 (0.11-0.13), prorb = 1.00 (0.71-1.40), rcorb = 0.40 (0.20-0.43), vb = 0.50 (0.59-0.67), dcl =0.50 (0.59-0.64), presctl = 0.33 (0.36-0.37), sctl = 0.92 (1.22-1.08), sterno = 0.50 (0.33-0.45), orbito = 0.67 (0.65-0.67), dcp = 0.44 (0.42-0.44), sctlp = 0.83 (1.20-1.25), C = 2.92 (2.93-4.30), 4c = 0.81 (0.55-0.82), 4v = 1.88 (1.66-1.76), 5x = 1.75 (0.94-1.33), ac = 2.60 (1.59-2.33), M = 0.44 (0.34-0.47), C3F = 0.38 (0.50-0.60).

Etymology.

A combination of the Latin words " serratus " (= serrated) + " foliaceus " (= folium), referring to the gonopods with numerous finely serrated processes.

Distribution.

China (Yunnan).

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 11. Scaptodrosophila serrateifoliacea 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.