Scaptodrosophila melanovittata, Peng & Lin & Chen, 2022

Peng, Hongen, Lin, Yong & Chen, Hongwei, 2022, Morphological and molecular evidence of eight new species of the genus Scaptodrosophila Duda (Diptera, Drosophilidae) from China, Zootaxa 5093 (2), pp. 169-194 : 179-180

Scaptodrosophila melanovittata sp. nov.

( Figs 4A–C , 10 )

Diagnosis. This species resembles S. trivittata Liu & Chen, 2018 in the pattern on the abdomen tergites and shape of surstylus, but can be distinguished from it by surstylus grown on outer surfaces of the epandrium ( Fig. 10A, B ); hypandrium shield shaped in ventral view; postgonite weak ( Fig. 10C, D ). This species exhibits closest genetic affinity to S. nigrolimbata in light of divergence in COI barcodes ( Table 2 ).

Description. Head ( Fig. 4A ): Frons dark brown. Pedicel dark brown. First flagellomere grayish, margins black. Facial carina yellowish brown, long, narrow, 1/2 the length of face.

Thorax ( Fig. 4B, C ): Mesonotum yellowish brown. Scutellum yellowish brown. Pleura hazel.

Abdomen ( Fig. 4B, C ): Tergites III to V yellowish brown with black caudal bands, the caudal bands on tergites II to V interrupted medially.

Male terminalia ( Fig. 10A–D ): Epandrium with ca. 13 epandrial bristles near posterior and ventral margins per side. Surstylus with 8 peg-like surstylar teeth on caudal margins ( Fig. 10A, B ). Hypandrium with a pair of paramedian hypandrial bristle. Pregonite with 3 sensilla medially. Phallus lacking pubescence ( Fig. 10C, D ).

Female terminalia ( Fig. 10E ): Oviscapt slightly triangular, expanded subapically. Oviscapt narrow with 1 long subapical trichoid ovisensillum, 17 peg-like ovisensilla per side on ventral margins.

Measurements. BL = 2.04 mm in holotype (mm in 3♂ and 1♀ paratypes: 2.00– 2.03 in ♂, 2.10 in ♀), ThL = 0.84 mm (0.89–0.98 in ♂, 0.95 in ♀), WL = 1.96 mm (1.82–1.87 in ♂, 1.94 in ♀), WW = 0.71 mm (0.80–0.82 in ♂, 0.83 in ♀), arb = 4/2 (4/2), avd = 0.83 (0.67–0.92), adf = 2.40 (3.00–3.78), flw = 3.20 (3.31–3.75), FW/HW = 0.27 (0.26–0.29), ch/o = 0.08 (0.08–0.09), prorb = 0.89 (0.78–0.82), rcorb = 0.33 (0.27–0.33), vb = 0.60 (0.43–0.60), dcl = 0.46 (0.36–0.44), presctl = 0.46 (0.40–0.44), sctl = 0.78 (0.78–0.91), sterno = 0.32 (0.45–0.55), orbito = 0.50 (0.50–0.60), dcp = 0.28 (0.32–0.38), sctlp = 1.00 (0.90–1.11), C = 5.33 (5.11–5.15), 4c = 0.60 (0.53–0.64), 4v = 1.73 (1.60–1.79), 5x = 1.33 (1.20–1.75), ac = 1.50 (1.50–1.60), M = 0.40 (0.43–0.47), C3F = 0.56 (0.56–0.63).

Materials examined. Holotype ♂ ( SCAU, No. 125121), CHINA: Guanlei, Mengla , Yunnan, 21°38′N, 101°10′E, alt. 621m, 21.iv.2016, J Huang . Paratypes: CHINA: 1♂ ( SCAU, No. 125122), Guanlei, Mengla , Yunnan, 21°38'N, 101°10'E, alt. 621m, 21.iv.2016, J Huang ; 1♂ ( SCAU, No. 125120), Mengdong, Cangyuan , Yunnan, 23°10'N, 99°13'E, alt. 1323m, 6.v.2016, YQ Liu ; 1♂ ( SCAU, No. 125119), Husa, Longchuan , Yunnan, 24°25'N, 97°46'E, alt. 1200m, 20.viii.2016, L Gong ; 1♀ ( SCAU, No. 125118), Mengma, Menglian , Yunnan, 22°12'N, 99°22'E, alt. 1060m, 14.iv.2018, HW Chen .

Distribution. China (Yunnan).

Etymology. A combination of the Greek words “ melas ” + “ vittat ”, referring to the black bands of abdomen.

Figures

FIGURE 4. External morphology. A–C. Scaptodrosophila melanovittata sp. nov. A. head, anterior view; B. habitus, dorsal view; C. habitus, lateral view. D–F. S. polytricapillum sp. nov. D. head, anterior view; E. habitus, dorsal view; F. habitus, lateral view. Scale bars = 0.5 mm.

FIGURE 10. Scaptodrosophila melanovittata sp. nov., male terminalia: A, B. Epandrium, surstylus and cercus (posterior and lateral views); C, D. Hypandrium, phallus, phallapodeme, pregonite and postgonite (ventral and lateral views); E. Oviscapt (lateral view). Scale bars = 0.1 mm.