Leucophenga mutabilis

Zhou, Lan & Chen, Hong-Wei, 2015, The genus Leucophenga (Diptera, Drosophilidae), part V: the mutabilis species group from East Asia, with morphological and molecular evidence, Zootaxa 4006 (1) : -

Key to all species examined of the mutabilis group

1. Palpus dark brown, sexually dimorphic (large, with 2, 3 thin setae in female; slender, with 1 row of 5–7 setae in male) ( Figs 2A, 2B , 5 A); proclinate orbital seta (Orb1) close to ocellar triangle ( Figs 2A, 2B , 5 A); cercus with 10 long setae near posterior margin ( Fig. 5 B, 6–11A)................................................................ mutabilis group...2

- Palpus yellow to brownish, slender in male and female; proclinate orbital seta not close to ocellar triangle; cercus with numer- ous, long or short setae............................................................ other Leucophenga species

2. Wing brown along anterodistal portion, with brown longitudinal stripe from bm-cu vein to r-m vein ( Fig. 2 C, 2D)........ 3

- Wing hyaline....................................................................................... 4

3. Abdominal tergites brown to black ( Fig. 4 M); scutellum brown ( Fig. 3 E); pleura yellow, with brown patches ( Fig. 3 F)............................................................................................... L. striatipennis

- Abdominal tergites nearly black ( Fig. 3 M, 3N); scutellum yellow, yellowish along margin ( Fig. 3 G); pleura yellowish ( Fig. 3 H)..................................................................................... L. taiwanensis

4. Mesonotum yellow, with 3 brown longitudinal stripes medially and sublaterally ( Fig. 2 I); pleura yellow, with multiple, dark brown to black patches ( Fig. 2 J)............................................................. L. magnipalpis

- Mesonotum lacking brown longitudinal stripes; pleura lacking dark brown to black patches........................... 5

5. Mesonotum brownish yellow, brown before scutellum ( Fig. 2 E); abdominal tergites usually black ( Fig. 4 A, 4M); aedeagus slender, with pubescence apically ( Fig. 5 C)......................................................... L. angusta

- Mesonotum nearly yellow; abdominal tergites yellow, with brown patterns; aedeagus with pubescence on distal 1/3....... 6

6. Second abdominal tergite entirely yellow ( Fig. 4 D, 4E)................................................ L. bellula

- Second abdominal tergite with brown to black patch medially ( Fig. 4 J–L)........................................ 7

7. Scutellum brown along basal margin, brownish yellow medially, pale along distal margin ( Fig. 3 A); pleura yellow, with brown patches above ( Fig. 3 B)..................................................................... L. nigripalpis

- Scutellum yellow, with brown margin ( Fig. 3 C); pleura nearly yellow ( Fig. 3 D)........................... L. orientalis

Figures

FIGURE 3. Thorax of male: A, B. Leucophenga nigripalpis; C, D. L. orientalis; E, F. L. striatipennis; G, H. L. taiwanensis.

FIGURE 4. Color patterns of abdominal tergites of male and female (including all changes examined): A – C. Leucophenga angusta (male and female); D, E. L. bellula (male); F – I. L. magnipalpis (male and female); J. L. nigripalpis (male); K, L. L. orientalis (male and female); M. L. striatipennis (male); N, O. L. taiwanensis (male and female); P. Color legend.

FIGURE 5. Leucophenga angusta Okada, 1956, male: A. Head of male; B. epandrium, surstylus and cercus (lateral view); C. hypandrium, paramere, aedeagus and aedeagal apodeme (lateral view). Scale bar = 0.1 mm.

FIGURE 2. A, B. Head of Leucophenga angusta (A, male; B, female); C. wing of L. striatipennis (male); D. wing of L. taiwanensis (male); E, F. thorax of L. angusta; G, H. thorax of L. bellula; I, J. thorax of L. magnipalpis.