Scaptodrosophila obscurata, Liu & Gao & Chen, 2017

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 : 97-98

Scaptodrosophila obscurata sp. n.

Figs 6E-H , 15

Type material.

Holotype ♂ (SCAU, No. 128347): CHINA: Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 760 m, 9.v.2012, HW Chen. Paratypes: CHINA: 1♂ (SCAU, No. 128348), same data as holotype; 20♂, 15♀ (SCAU, Nos 128349-368), Menglun, Mengla, Yunnan, 21°55'N, 101°16'E, alt. 570 m, 3-4.xi.2001, HW Chen; 1♂ (SCAU, No. 128369), Hesong, Menghai, Yunnan, alt. 1940 m, 6.v.2012, HW Chen.

Diagnosis.

This species differs from the other known species of this group in having the paramere with a hook-shaped projection basoventrally (Fig. 15D ), and the aedeagus apically acute in lateral view (Fig. 15D ).

Description.

Male and female: Head (Fig. 6E ): frons brown and glossy. Pedicel brown; first flagellomere yellowish. Facial carina brown and glossy.

Thorax (Fig. 6F, G ): mesonotum brown, with two yellowish brown longitudinal stripes submedially. Acrostichal setulae in ca. 10-12 irregular rows. Scutellum brown, dark brown near basal scutellar setae, pale at tip. Pleura dark brown.

Abdomen (Fig. 6H ): tergites II to V yellow anteromedially, with black caudal bands; tergite VI yellowish brown.

Male terminalia (Fig. 15A-D ): epandrium with ca. 16 setae near posterior and ventral margins per side. Surstylus with 5-6 peg-like prensisetae. Hypandrium with a pair of paramedian setae and pubescence medially. Paramere with four sensilla medially. Aedeagus lacking pubescence.

Female terminalia (Fig. 15E ): oviscapt with one subapical trichoid ovisensillum, 15, 11 and 5 peg-like ovisensilla per side on ventral, dorsal and apical margins, respectively.

Measurements [holotype (paratypes range in 6♂, 1♀), in mm]: BL = 3.47 (2.93-3.42, 3.42), ThL = 1.60 (1.38-1.60, 1.64), WL = 2.98 (2.71-2.98, 3.11), WW = 1.16 (1.07-1.20, 1.24).

Indices: arb = 4/3 (4/3), avd = 0.95 (0.94-1.05), adf = 3.50 (3.29-4.00), flw = 1.67 (1.67-2.00), FW/HW = 0.38 (0.38-0.43), ch/o = 0.09 (0.05-0.12), prorb = 0.65 (0.32-0.63), rcorb = 0.23 (0.19-0.38), vb = 1.00 (0.83-1.00), dcl = damaged (0.58-0.73), presctl = damaged (0.23-0.42), sctl =0.88 (0.92-1.06), sterno = 0.65 (0.59-0.85), orbito = 0.50 (0.46-0.67), dcp = 0.43 (0.40-0.46), sctlp = 0.93 (0.88-1.07), C = 2.20 (1.98-2.30), 4c = 1.03 (1.00-1.21), 4v = 1.98 (1.88-2.26), 5x = 1.77 (1.69-2.00), ac = 2.16 (2.10-2.73), M = 0.58 (0.60-0.69), C3F = 0.83 (0.84-0.93).

Etymology.

From the Latin word " Scaptodrosophila obscurata " (= dark), referring to the thorax dark.

Distribution.

China (Yunnan).

Figures

Figure 6. Head, mesonotum, scutellum, pleura and abdomen of male. A-D S. nigripecta sp. n. E-H S. obscurata sp. n. Scale bars 1 mm.

Figure 15. Scaptodrosophila obscurata sp. n. 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.