Scaptodrosophila scutellimargo (Duda, 1924)

Liu, Yi-Qin, Gao, Qing-Song & Chen, Hong-Wei, 2017, The genus Scaptodrosophila Duda part I: the brunnea species group from the Oriental Region, with morphological and molecular evidence (Diptera, Drosophilidae), ZooKeys 671, pp. 87-118 : 93

Scaptodrosophila scutellimargo (Duda, 1924)

Figs 4A-D , 10

Drosophila scutellimargo Duda, 1924: 243; Tsacas & Chassagnard, 1976: 92.

Specimens examined.

CHINA: 4♀ (SCAU, Nos 128204-07), Longdong, Guangzhou , Guangdong, 12°19'N, 113°21'E, alt. 200 m, 1.v.2007, HW Chen ; 2♀ (SCAU, Nos 128378-79), Tianluhu Park, Guangzhou , Guangdong, 23°13'N, 113°09'E, alt. 240 m, 6.ix.2015, YL Wang ; 1♂ (SCAU, No. 128208), Liuxihe, Conghua , Guangdong, 23°26'N, 113°30'E, alt. 200 m, 12.v.2010, XY Xu ; 9♂, 3♀ (SCAU, Nos 128189-200), Jianfengling, Ledong , Hainan, 18°41'N, 108°52'E, alt. 680-820 m, 23.iv.2007, XP Chen, JJ Gao ; 2♂, 3♀ (SCAU, Nos 128377-81), Mulun, Huangjiang , Guangxi, 25°09'N, 108°01'E, alt. 449 m, 19.ix.2015, 26.vii.2015, YQ Liu ; 1♂, 2♀ (SCAU, Nos 128382-84), Weng’ang, Libo , Guizhou, 25°13'N, 107°56'E, alt. 754 m, 16.ix.2015, L Zhu ; 6♂, 7♀ (SCAU, Nos 128229-40, 128370), Menglun, Mengla , Yunnan, 24°41'N, 101°25'E, alt. 680 m, 17.iv.2007, HW Chen, JJ Gao ; 10♂, 10♀ (SCAU, Nos 128209-28), Wangtianshu, Mengla , Yunnan, 24°41'N, 101°25'E, alt. 680 m, 22-25.iv.2007, 9.x.2012, HW Chen, JJ Gao . JAPAN: 1♂, 2♀ (SCAU, Nos 128201-03), Iriomote Island , Okinawa, 24°32'N, 123°88'E, alt. 150 m, 12.v.2001, HW Chen .

Diagnosis.

Paramere distally broadened and pubescent in lateral view (Fig. 10D ); gonopods roundly expanded dorsally in lateral view (Fig. 10D ). The 5.3% interspecific genetic distance to S. scutellimargo is one of the smallest interspecific distances ascertained within this group (Table 2 ).

Description.

Male and female: Head (Fig. 4A ): frons yellowish brown. Pedicel brownish; first flagellomere yellowish. Facial carina yellowish, short, as 1/3 length as face.

Thorax (Fig. 4B, C ): mesonotum brown, with three yellowish brown longitudinal stripes. Acrostichal setulae in ca. 8-10 irregular rows. Scutellum yellowish, dark brown near basal scutellar setae, pale at tip. Pleura brownish to brown.

Abdomen (Fig. 4D ): all tergites yellow with dark brown caudal bands, the caudal band on tergite II narrowed medially.

Male terminalia (Fig. 10A-D ): epandrium with ca. 16 setae near posterior and ventral margins per side. Surstylus with eight peg-like prensisetae. Hypandrium with a pair of paramedian setae and pubescence basomedially. Paramere with eight sensilla medially distally. Aedeagus lacking pubescence.

Female terminalia (Fig. 10E ): oviscapt with one subapical trichoid ovisensillum, 17, 14 and 5 peg-like ovisensilla per side on ventral, dorsal and apical margins, respectively.

Measurements (range in 7♂, 3♀, in mm): BL = (2.73-3.20, 3.07-3.33), ThL = (1.29-1.42, 1.07-1.47), WL = (2.53-2.98, 2.87-3.07), WW = (0.93-1.07, 1.00-1.20).

Indices: arb = 4/3, avd = 0.94-1.06, adf = 0.40-0.80, flw = 2.00-2.50, FW/HW = 0.38-0.42, ch/o = 0.06-0.09, prorb = 0.60-0.74, rcorb = 0.20-0.33, vb = 0.83-1.25, dcl = 0.51-0.59, presctl = 0.31-0.44, sctl = 0.87-1.03, sterno = 0.57-0.69, orbito = 0.40-0.60, dcp = 0.36-0.48, sctlp = 0.86-1.00, C = 1.97-2.20, 4c = 1.00-1.20, 4v = 2.00-2.27, 5x = 1.92-2.20, ac = 2.27-2.92, M = 0.62-0.77, C3F = 0.90-0.94.

Distribution.

China (Taiwan, Guangdong, Hainan*, Guangxi*, Guizhou*, Yunnan), Japan* (Ryukyu Is.).

Figures

Figure 4. Head, mesonotum, scutellum, pleura and abdomen of male. A-D S. scutellimargo E-H S. maculata sp. n. Scale bars 1 mm.

Figure 10. Scaptodrosophila scutellimargo (Duda, 1924). A, B epandrium, surstylus and cercus (lateral and posterior views) C, D hypandrium, parameres, gonopods, aedeagus and aedeagal apodeme (ventral and lateral views) E oviscapt (lateral view). Scale bars 0.1 mm.