Leucophenga angusta Okada

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 angusta Okada

( Figs 2A, 2B, 2 E, 2F, 4A–C, 5)

Leucophenga (Leucophenga) angusta Okada, 1956: 28 ; Gupta & Panigrahy, 1987: 62; Okada, 1989: 807; Fartyal et al., 2005: 411.

Diagnosis. This species is mostly similar to L. striatipennis in the abdominal tergites dark brown to black ( Fig. 4 A, 4M), but can be distinguished from the latter by wing hyaline, and aedeagus slender and pubescent apically ( Fig. 5 B), see under that species.

Description. Male and female: Frons yellow. Pedicel mostly yellowish brown; first flagellomere yellow. Palpus brown in male and female. Mesonotum brownish yellow, brown before scutellum ( Fig. 2 E). Acrostichal setulae in ca. 14–16 irregular rows ( Fig. 2 E). Scutellum brownish yellow medially, brown along margin ( Fig. 2 E). Pleura brownish above, yellow below ( Fig. 2 F). Halter brown, with yellowish patch apically ( Fig. 2 F). Abdominal tergites usually black, laterally with yellow parches on 2nd ( Fig. 4 A), sometimes yellow, with dark brown patches ( Fig. 4 B, 4C). Male terminalia: Epandrium with 3 setae near posterior margin and 4 setae on ventral corner per side ( Fig. 5 B). Paramere with 5 sensilla distally ( Fig. 5 C).

Measurements. BL = 2.47–2.80 mm in 5♂, 2.47–2.87 mm in 3♀, ThL = 1.20–1.33 mm in ♂, 1.20–1.27 mm in ♀, WL = 2.33–2.67 mm in ♂, 2.27–2.60 mm in ♀, WW = 0.87–1.00 mm in ♂, 0.87–1.00 mm in ♀, arb = 5–7/3– 4, avd = 0.67–1.00, adf = 1.67–2.00, flw = 1.67–2.00, FW/HW = 0.31–0.44, ch/o = 0.05–0.06, prorb = 0.75–0.88, rcorb = 0.67–0.88, vb = 0.25–0.50, dcl = 0.43–0.67, presctl = 0.40–0.61, sctl = 1.29–1.42, sterno = 0.60–0.78, orbito = 1.33–2.00, dcp = 0.14–0.21, sctlp = 0.86–1.12, C = 2.00–2.60, 4c = 1.21–1.59, 4v =1.92–2.55, 5x = 1.00– 1.50, ac = 2.11–2.71, M = 0.50–0.75, C3F = 0.67–0.81.

Specimens examined. CHINA: 1♂, 1♀ (SCAU, Nos 127275, 76), Dajing, Kaixian, Chongqing, 31˚30'N, 108˚27'E, 329m, 3.viii.2013, XY Hu; 3♂, 4♀ (SCAU, Nos 127277–83), Tianmushan, Linan, Zhejiang, 30˚20′N, 119˚25′E, 1100m, 30.vii.–2.viii.2011, 6.vii.2013, ex tussock, ZF Shao, SJ Yan, K Liu; 1♂ (SCAU, No. 127284), Jiulongshan, Suicang, Zhejiang, 28˚21′N, 118˚52′E, 1614m, 4.vii.2013, ex tussock, K Liu; 1♂, 1♀ (SCAU, Nos 127285, 86), Mangshan, Yizhang, Hunan, 24˚55′N, 112˚45′E, 1200m, 3.x.2004, ex tussocks, HL Cao, MF Xu; 1♀ (SCAU, No. 127287), Gaoxiong, Taiwan, 22˚35'N, 120˚20'E, 640m, 8.vi.2011, XY Liu; 1♂ (SCAU, No. 127288), Lugu, Nantou, Taiwan, 27˚44′N, 120˚47′E, 350m, 18.x.2012, ex tussock, HW Chen; 2♂ (SCAU, Nos 127289, 90), Huolushan, Guangzhou, Guangdong, 23˚11′N, 113˚23′E, 60m, 5.iv.2005, MF Xu; 6♂, 2♀ (SCAU, Nos 127291– 98), Dinghushan, Zhaoqing, Guangdong, 25˚00′N, 112˚34′E, 560m, 23.xi.2004, MF Xu; 1♂ (SCAU, No. 127299), Jianfengling, Ledong, Hainan, 18˚41′N, 108˚52′E, 220m, 20.iv.2004, HW Chen; 14♂, 6♀ (SCAU, Nos 127300– 19), Bapen, Fusui, Pingxiang, Congzuo, Guangxi, 22˚05′N, 107˚32′E, 220m, 18–23.viii.2004, HW Chen; 2♂, 1♀ (SCAU, Nos 127320–22), Maoershan, Guilin, Guangxi, 25˚51′N, 110˚27′E, 700m, 18–19.x.2004, ex tree trunks, XL Zhang; 17♂, 3♀ (SCAU, Nos 127323–42), Xianheping, Xingyi, Guizhou, 24˚58′N, 105˚56′E, 700m, 14,15. vii.2014, ex tree trunks, QS Gao, YL Wang, Y Zhang; 1♂ (SCAU, No. 127343), Hutiaoxia, Diqing, Yunnan, 27˚12'N, 100˚03'E, 2000m, 23.viii.2011, ex tussocks, HW Chen; 4♂ (SCAU, Nos 127344–47), Zhengxing, Jinggu, Yunnan, 22˚49′N, 100˚03′E, 1100m, 24.vii.2009, ex tussock, L Wu; 20♂, 20♀ (SCAU, Nos 127348–67, 127373– 92), Menglun, Mengla, Yunnan, 20˚41′N, 101˚25′E, 680–980m, 17.iv.2004, 11–12.iv.2007, 27–28.ix.2011, ex tussock, HW Chen, JJ Gao; 3♂, 1♀ (SCAU, Nos 127369–72), Wangtianshu, Mengla, Yunnan, 21˚28'N, 101˚38'E, 570m, 22–24.iv.2007, 13.x.2010, ex tree trunk, HW Chen, JJ Gao; 1♀ (SCAU, No. 127368), Hesong, Menghai, Yunnan, 21˚50′N, 100˚05′E, 1900m, 11.iv.2011, ex tussock, JJ Lu; 2♂, 1♀ (SCAU, Nos 127393–95), Yixiang, Puer, Yunnan, 22˚47′N, 101˚03′E, 1100m, 18,19. ix.2007, JJ Gao; 1♂ (SCAU, No. 127396), Tongmai, Bomi, Xizang, 30˚06'N, 95˚05'E, 2000m, 11,12. x.2010, ex tussock, L Wang; 3♂, 2♀ (SCAU, Nos 127397–401), Beibeng, Motuo, Xizang, 18˚10'N, 108˚52'E, 1000m, 30.ix.2010, ex tussock, YR Sui. JAPAN: 1♀ (SCAU, No. 127402), Tomochi, Kumamoto, 35˚37'N, 139˚14'E, 570m, 24.x.1997, HW Chen.

Distribution. China (Zhejiang, Taiwan, Hunan, Guangdong, Hainan, Guangxi, Chongqing, Guizhou, Yunnan, Xizang), Japan (Honshu, Kyushu, Okinawa), Korea, Philippines, Vietnam, Malaysia, Singapore, Indonesia (Sumatra, Java), Myanmar, Nepal, India (Orissa, Uttaranchal), Sri Lanka, Micronesia, Fiji, Australia.

Figures

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.