Scaptodrosophila zebrina, Liu & Chen, 2018

Liu, Yi-Qin & Chen, Hong-Wei, 2018, The genus Scaptodrosophila Duda part II: the coracina species group from East Asia, with morphological and molecular evidence (Diptera, Drosophilidae), ZooKeys 736, pp. 119-148 : 139-141

Scaptodrosophila zebrina sp. n.

Figs 7B, D, F , 16

Holotype.

♂ (SCAU, No. 110007) CHINA: Mengyuan, Mengla, Yunnan, 21°47'N, 101°22'E, alt. 995 m, 7.viii.2016, HW Chen.

Paratypes.

CHINA: 3♂, 4♀ (SCAU, Nos 110008-14), same data as holotype, HW Chen, L Gong, YQ Liu; 1♂, 1♀ (SCAU, Nos 110015, 16), Wangtianshu, Mengla, Yunnan, alt. 580 m, 22.iv.2007, HW Chen; 2♀ (SCAU, Nos 110017, 18), Wangtianshu, Mengla, Yunnan, alt. 760 m, 27.viii.2012, HW Chen.

Diagnosis.

Frons yellowish brown with two brown longitudinal stripes (Fig. 7B ); mesonotum yellowish brown with six dark brown longitudinal stripes (Fig. 7D, F ); gonopods long in lateral view (Fig. 16D ); aedeagus rectangle shaped in lateral view (Fig. 16D ).

Description.

(♂, ♀) Head (Fig. 7B ): Pedicel yellowish brown; first flagellomere yellowish, margins black. Facial carina yellowish, broad, 1/3 long as face.

Thorax (Fig. 7D, F ): Mesonotum yellowish brown. Acrostichal setulae in ca. ten regular rows. Prescutellar setae small. Scutellum yellowish brown. Pleura yellowish.

Abdomen (Fig. 7D, F ): Tergites II to VI yellow with black caudal bands, the caudal bands on tergites interrupted medially.

Male terminalia (Fig. 16A-D ): Epandrium with ca. 12 setae near posterior and ventral margins per side. Surstylus with seven peg-like prensisetae. Hypandrium lacking pubescence. Paramere long, with two sensilla distally.

Female terminalia (Fig. 16E ): Oviscapt with five subapical trichoid ovisensilla, and 13 ovisensilla.

Measurements [holotype ♂ (range in 4♂, 5♀ paratypes), in mm]: BL = 2.17 (2.20-2.50, 2.33-2.67), ThL = 1.13 (1.10-1.17, 0.90-1.53), WL = 2.13 (2.10-2.20, 2.20-2.47), WW = 0.90 (0.90-1.20, 0.90-1.00).

Indices: arb = 4/2 (3-4/2), avd = 1.00 (0.75-1.00), adf = 1.75 (1.75-2.67), flw = 1.50 (1.50-2.00), FW/HW = 0.43 (0.40-0.47), ch/o = 0.09 (0.09-0.10), prorb = 0.80 (0.64-0.90), rcorb = 0.40 (0.27-0.45), vb = 0.29 (0.25-0.43), dcl = 0.57 (0.55-0.71), presctl = 0.38 (0.32-0.62), sctl = 1.00 (0.95-1.18), sterno = 0.50 (0.41-0.64), orbito = 0.60 (0.33-0.50), dcp = 0.56 (0.47-1.00), sctlp = 0.89 (0.67-1.00), C = 2.50 (2.06-2.65), 4c = 0.94 (0.94-1.13), 4v = 1.82 (1.81-2.00), 5x = 1.50 (1.29-1.80), ac = 3.20 (3.00-3.60), M = 0.53 (0.47-0.63), C3F = 0.63 (0.56-0.67).

Etymology.

From the Latin word zebrinus, referring to the brown longitudinal stripes on the mesonotum.

Distribution.

China (Yunnan).

Key to species of the coracina group

1	Body yellowish brown to black; arista with three or four dorsal and two ventral branches in addition to terminal bifurcation; facial carina narrow and flat; prescutellar setae usually large, as long as anterior dorsocentral setae; hypandrium usually with a pair of very large paramedian setae	coracina group ... 2
2	Frons yellowish brown with two brown longitudinal stripes (Fig. 7B ); mesonotum yellowish brown with six dark brown longitudinal stripes (Fig. 7D, F )	S. zebrina sp. n.
-	Frons lacking longitudinal stripes; mesonotum lacking longitudinal stripes	3
3	Hypandrium with pubescence	4
-	Hypandrium lacking pubescence	6
4	Body brown or black (Fig. 3C-F ); paramere with pubescence completely (Fig. 8C, D ); aedeagus short, rod-like, with one fan-like membrane apically (Fig. 8C, D )	S. coracina
-	Body yellowish brown; paramere sometimes with pubescence; aedeagus lacking membrane apically	5
5	Pleura yellowish, with one brown longitudinal stripe (Fig. 7E ); surstylus with four large setae (Fig. 15A, B ); cercus with six long peg-like prensisetae (Fig. 15A, B ); paramere elliptical shaped in lateral view, lacking pubescence apically (Fig. 15C, D ); aedeagus rod-like, elliptically broadened apically (Fig. 15C, D )	S. ventriobscurata sp. n.
-	Pleura yellowish brown, lacking longitudinal stripe (Fig. 4F ); surstylus lacking large setae (Fig. 10A, B ); cercus lacking long peg-like prensisetae (Fig. 10A, B ); paramere dolabriform in lateral view, with pubescence apically (Fig. 10C, D ); aedeagus very broad and finely curved apically in lateral view (Fig. 10D )	S. fusciventricula sp. n.
6	Gonopods bilobed apically	7
-	Gonopods fused completely apically	8
7	Pleura yellowish brown, lacking longitudinal stripe (Fig. 6F ); abdomen tergites yellow, tergites II to IV yellow with dark brown caudal bands (Fig. 6D, F ); aedeagus rod-like, with pubescence and broadened apically (Fig. 14C, D )	S. trivittata sp. n.
-	Pleura yellowish brown, with two brown longitudinal stripes (Fig. 5F ); abdomen tergites yellowish brown, tergites II to V yellow with dark brown caudal bands, tergite VI dark brown (Fig. 5D, F ); aedeagus quadrangle in lateral view, lacking pubescence (Fig. 12D )	S. longispinata sp. n.
8	Paramere with one small projection subbasally (Fig. 13D ); gonopods with one small projection distally (Fig. 13D ); aedeagus triangle shaped in lateral view (Fig. 13D )	S. nigrolimbata sp. n.
-	Paramere lacking projection subbasally; gonopods lacking projection distally; aedeagus inverted triangle shaped in lateral view	9
9	Tergite VI yellowish brown, with dark brown caudal bands (Fig. 5C, E ); paramere small, finger like in lateral view (Fig. 11D ); aedeagus round dorsally in lateral view (Fig. 11D )	S. helvpecta sp. n.
-	Tergite VI yellow, lacking band (Fig. 4C ); paramere curved strongly in lateral view (Fig. 9D ); aedeagus tapering dorsally in lateral view (Fig. 9D )	S. fuscilimba sp. n.

Figures

Figure 3. Frontal, dorsal, and lateral views of male. Scaptodrosophila coracina from Okinawa, Japan (A, C, E) and Guizhou, China (B, D, F). Scale bars: 0.5 mm.

Figure 4. Frontal, dorsal, and lateral views of male. Scaptodrosophila fuscilimba sp. n. (A, C, E); S. fusciventricula sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 5. Frontal, dorsal, and lateral views of male. Scaptodrosophila helvpecta sp. n. (A, C, E); S. longispinata sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 6. Frontal, dorsal, and lateral views of male. Scaptodrosophila nigrolimbata sp. n. (A, C, E); S. trivittata sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 7. Frontal, dorsal, and lateral views of male. Scaptodrosophila ventriobscurata sp. n. (A, C, E); S. zebrina sp. n. (B, D, F). Scale bars: 0.5 mm.

Figure 8. Scaptodrosophila coracina (Kikkawa & Peng, 1938). A and B epandrium (epand), surstylus (sur), and cercus (cerc) (posterior and lateral views, respectively) C and D hypandrium (hypd), parameres (pm), gonopods (gon), aedeagus (aed), and aedeagal apodeme (aed a) (ventral and lateral views, respectively) E oviscapt (lateral view). Scale bars: 0.1 mm.

Figure 9. Scaptodrosophila fuscilimba sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively) E oviscapt (lateral view). Scale bars: 0.1 mm.

Figure 10. Scaptodrosophila fusciventricula sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively). Scale bars: 0.1 mm.

Figure 11. Scaptodrosophila helvpecta sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively) E oviscapt (lateral view). Scale bars: 0.1 mm.

Figure 12. Scaptodrosophila longispinata sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively). Scale bars: 0.1 mm.

Figure 13. Scaptodrosophila nigrolimbata sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively). Scale bars: 0.1 mm.

Figure 14. Scaptodrosophila trivittata sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively). Scale bars: 0.1 mm.

Figure 15. Scaptodrosophila ventriobscurata sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively) E oviscapt (lateral view). Scale bars: 0.1 mm.

Figure 16. Scaptodrosophila zebrina sp. n. A and B epandrium, surstylus, and cercus (posterior and lateral views) C and D hypandrium, parameres, gonopods, aedeagus, and aedeagal apodeme (ventral and lateral views, respectively) E oviscapt (lateral view). Scale bars: 0.1 mm.