Leucophenga bellula (Bergroth)

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) : -

Leucophenga bellula (Bergroth)

( Figs 2 G, 2H, 4D, 4E, 6)

Drosophila bellula Bergroth, 1894: 75 .

Leucophenga (Leucophenga) bellula: Wheeler, 1981: 25 . Leucophenga bellula: Okada, 1989: 808 ; Fartyal et al. 2005: 411.

Diagnosis. This species is somewhat similar to L. angusta in the color patterns of abdominal tergites ( Fig. 4 D, 4E), but can be distinguished from the latter by having the mesonotum yellow ( Fig. 1 J), the aedeagus thick and pubescent on distal 1/3 ( Fig. 6 B).

Description. Male and female: Frons yellow to yellowish brown. Pedicel mostly yellow; first flagellomere yellowish. Palpus light brown in male and female. Acrostichal setulae in ca. 12–14 irregular rows ( Fig. 2 G). Postpronotal lobe yellow ( Fig. 2 H). Scutellum nearly yellow ( Fig. 2 G). Pleura yellow below, brownish yellow above ( Fig. 2 G, 2H). Halter brownish yellow, white apically ( Fig. 2 H). Abdominal tergites yellow, with brown patches ( Fig. 4 D, 4E). Male terminalia: Epandrium with 14 setae near posterior margin and ventral corner per side ( Fig. 6 A). Paramere lacking sensilla ( Fig. 6 B

Measurements. BL = 2.20–2.60 mm in 5♂, 2.53 mm in 1♀, ThL = 1.07–1.27 mm in ♂, 1.33 mm in ♀, WL = 2.00– 2.47 mm in ♂, 2.67 mm in ♀, WW = 0.80–0.93 mm in ♂, 1.07 mm in ♀, arb = 6/3–4, avd = 0.83–1.25, adf = 2.00–3.00, flw = 2.00–3.00, FW/HW = 0.34–0.50, ch/o = 0.05–0.06, prorb = 0.50–1.00, rcorb = 0.43–0.88, vb = 0.25–0.67, dcl = 0.33–0.54, presctl = 0.27–0.60, sctl = 1.08–1.30, sterno = 0.67–0.67, orbito = 1.33–1.67, dcp = 0.17–0.29, sctlp = 0.63–0.88, C = 2.00–2.29, 4c = 1.33–1.50, 4v =2.08–2.42, 5x = 1.00–1.80, ac = 2.00–2.50, M = 0.58–0.90, C3F = 0.60–0.75.

Specimens examined. CHINA: 2♂ (SCAU, Nos 127764, 65), Jianfengling, Ledong, Hainan, 18.iv.2004, HW Chen; 1♂ (SCAU, No. 127766), Maoershan, Guilin, Guangxi, 19.x.2004, ex tree trunks, XL Zhang; 2♂, 1♀ (SCAU, Nos 127767–769), Nonggang, Guangxi, 22˚22'N, 106˚51'E, 500m, 5.vi.1993, ex tree trunks, YS Cui; 1♂, 3♀ (SCAU, Nos 127770–73), Xianheping, Xingyi, Guizhou, 14,15. vii.2014, ex tree trunks, YL Wang; 2♂ (SCAU, No. 127774, 76), Menglun, Mengla, Yunnan, 17.iv.2004, 22.iv.2007, ex tussocks, HW Chen; 1♂ (SCAU, No. 127775), Wangtianshu, Mengla, Yunnan, 22–24.iv.2007, 13.x.2010, ex tree trunk, HW Chen; 2♂ (SCAU, Nos 127777, 78), Yixiang, Puer, Yunnan, 12.v.2012, JJ Gao; 4♂, 4♀ (SCAU, Nos 127779–86), Muyiji Park, Ximeng, Yunnan, 22˚37'N, 99˚35'E, 1103m, 4.iv.2011, ex tussocks, JM Lu, ZF Shao, YR Su, SJ Yan.

Distribution. China (Hainan, Guangxi, Guizhou, Yunnan), Japan, Nepal, India, Sri Lanka, Malaysia, Indonesia (Java), Micronesia, Papua New Guinea, Australia, Africa.

Figures

FIGURE 1. The NJ phylogenetic tree of the mutabilis species group. The numbers around the nodes are bootstrap values (BP, whth 1,000 re-sampling replicates).

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 6. Leucophenga bellula (Bergroth, 1894), male: A. Epandrium, surstylus and cercus (lateral view); B. 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.