Scaptodrosophila abdentata, 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 abdentata sp. nov.

Figs 4A, C, E , 9

Material examined.

Holotype. China: ♂ (SCAU, No. 127162), Nanling, Shaoguan , Guangdong, 24°38'N, 112°40'E, alt. 800 m, 3.iii.2004, MF Xu . Paratypes. China: 1♂, 2♀ (SCAU, Nos 127163-65), Nanling, Ruyuan , Guangdong, 24°38'N, 112°40'E, alt. 800 m, 3.iii.2004, MF Xu ; 1♂, 2♀ (SCAU, Nos 127166-68), Jianfengling, Ledong , Hainan, 18°41'N, 108°52'E, alt. 700 m, 23.iv.2007, HW Chen ; 1♂, 1♀ (SCAU, Nos 127169-70), Beibeng, Motuo , Xizang, 29°19'N, 95°20'E, alt. 780 m, 4.x.2010, YR Su ; 2♂ (SCAU, Nos 127171-72), Wangtianshu, Mengla , Yunnan, 21°28'N, 101°38'E, alt. 580 m, 23.iv.2007, HW Chen ; 1♂ (SCAU, No. 110918), Muyiji, Ximeng , Yunnan, 22°37'N, 99°35'E, alt. 1100 m, 23.iv.2007, HW Chen ; 1♂ (SCAU, No. 110919), Muyiji, Ximeng , Yunnan, 22°37'N, 99°35'E, alt. 1203 m, 30.iv. 2016, YQ Liu ; 2♂ (SCAU, Nos 110920, 21), Mengdong, Cangyuan , Yunnan, 23°10'N, 99°13'E, alt. 1323 m, 6.v.2016, YQ Liu .

Diagnosis.

Surstylus with a row of ca 9 long, peg-like prensisetae on caudal margin, and ca 6 setae on outer surface (Fig. 9A, B ); paramere leaf-shaped in lateral view, with ca 3 sensillae and a row of fine setae (Fig. 9C, D ); aedeagus broadened apically (Fig. 9C, D ).

Description.

(♂, ♀) Head (Fig. 4A ): Frons yellowish brown. Pedicel brown. First flagellomere yellowish. Facial carina brownish, short, 1/3 length as face.

Thorax (Fig. 4C, E ): Mesonotum and scutellum yellowish brown. Acrostichal setulae in ca 8 regular rows. Halter hazel. Wings yellowish.

Abdomen (Fig. 4C, E ): Tergites creamy white.

Male terminalia: Epandrium with ca 15 setae near posterior margin and ventral corner on each side (Fig. 9A, B ). Hypandrium glabrous (Fig. 9C, D ).

Female terminalia (Fig. 8E ): Oviscapt with 3 long subapical trichoid ovisensilla, 15 peg-like ovisensilla on each side on ventral margins and 5 trichoid ovisensilla on dorsal.

Measurements [holotype ♂ (range in 5♂, 5♀), in mm]: BL = 2.20 (1.73-1.93, 2.00-2.27), ThL = 1.07 (0.80-1.00, 1.00-1.13), WL = 2.40 (1.87-2.20, 2.20-2.33), WW = 0.93 (0.67-0.87, 0.87-0.93).

Indices: arb = 2/1 (2/1), avd = 0.60 (0.60-1.00), adf = 2.50 (2.00-2.50), flw = 2.00 (1.50-2.50), FW/HW = 0.39 (0.41-0.50), ch/o = 0.07 (0.08-0.10), prorb = 0.83 (0.71-1.00), rcorb = 0.50 (0.33-0.50), vb = 0.50 (0.50-0.67), dcl = 0.58 (0.54-0.75), presctl = 0.50 (0.38-0.55), sctl = 1.25 (1.00-1.31), sterno = 0.78 (0.60-0.72), orbito = 0.67 (0.67), dcp = 0.33 (0.31-0.44), sctlp = 1.83 (0.80-1.00), C = 3.23 (2.21-3.00), 4c = 0.93 (0.92-1.20), 4v =2.43 (2.21-3.00), 5x = 1.60 (1.60-2.00), ac = 2.60 (2.40-3.00), M = 0.57 (0.57-0.82), C3F = 0.38 (0.31-0.38).

Etymology.

A combination of the Latin words: " ab -" + " dentatus ", referring to the surstylus with a line discontinuous of prensisetae.

Distribution.

China (Guangdong, Hainan, Yunnan, Xizang).

Figures

Figure 4. Head, mesonotum, scutellum, pleura and abdomen of male. A, C, E S. abdentata sp. nov. B, D, F S. platyrhina sp. nov. Scale bars: 0.5 mm.

Figure 8. Scaptodrosophila puncticeps (Okada, 1956) ♂. 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.

Figure 9. Scaptodrosophila abdentata 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, aedeagu, aedeagal apodeme, paramere and gonopods (lateral view) E oviscapt (lateral view). Scale bars: 0.1 mm.