Leucophenga nigroscutellata Duda 1924
Creators: name: Huang, Jia
name: Su, Yirui
name: Chen, Hongwei
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Leucophenga
Leucophenga nigroscutellata

description: Leucophenga nigroscutellata Duda, 1924
(Figs. 2 D, 3G, 3H, 7E, 7F, 8A, 13)
Leucophenga nigroscutellata Duda, 1924a: 186; 1924b: 237; Lin & Wheeler, 1972: 249; Okada, 1987: 679.
Diagnosis. This species is mostly similar to L. fuscipedes sp. nov. in having the wing fuscous along R1 and costa (Fig. 2 D, L), the shape of paramere (Figs. 13, 20 C), and the aedeagus ventrolaterally with a thin process bearing a sensillum at tip (Figs. 13, 20 D), but can be distinguished from the latter by the color patterns of abdominal tergites in both male (Fig. 7 E, F) and female (Fig. 8 A), and the aedeagus rounded apically (Fig. 13 D); see below that species.
However, the specimens show distinctly differences from the latest and most relevant description of L. nigroscutellata from Malaysia and Indonesia (Okada 1987) in the paramere (Fig. 13 C) and aedeagus (Fig. 13 D) lacking pubescence, and the structure of aedeagus (Fig. 13 D), while no conspicuous difference could be found in having the thorax mostly dark colored (Fig. 3 G), and the color patterns of abdominal tergites in both male (Fig. 7 E, F; Fig. 1 C in Okada 1987) and female (Fig. 8 A; Fig. 1 D in Okada 1987); moreover, parts of the specimens were collected near the type locality. Therefore, all of the specimens were identified as L. nigroscutellata to avoid further confusion.
Description. Ocellar triangle dark brown, with ca. 0–2 seta(e) above ocellar setae. Frons brownish yellow, with an indistinct, brownish, longitudinal stripe medially. Pedicel brownish yellow; first flagellomere yellow. Clypeus brown. Palpus brownish yellow to brownish. Mesonotum brownish yellow to brownish, mostly with three broad, brown, longitudinal stripes medially and laterally in male (Fig. 3 G), brownish yellow, brownish before scutellum in female. Postpronotal lobe yellow (Fig. 3 H). Acrostichal setulae in ca. 8–12 irregular rows (Fig. 3 G). Scutellum dark brown, brownish yellow at tip (Fig. 3 G). Pleura, katepisternum and meron mostly brown above (Fig. 3 H). Wing (Fig. 2 D): Costal vein between R2+3 and R4+5 distally with ca. 4–7 peg-like spinules on ventral surface. Midleg obviously dark brown on knees. Abdominal tergites brown to black, with a yellow patch medially between 2nd to 3rd tergites in male (Fig. 7 E), 2nd tergite with a yellow patch medially or posteromedially in female (Figs. 7 E, 8A), 5th tergite with a pair of yellow patches anteromedially in some female (Fig. 8 A). Male terminalia: Epandrium with ca. 3 setae near posterior margin per side (Fig. 13 A). Surstylus rounded apically (Fig. 13 A). Hypandrium with 1 sensillum (Fig. 13 B). Paramere with ca. 1 sensillum submediodorsally and ca. 7 sensilla distally (Fig. 13 C).
Measurements. BL = 2.40–2.70 mm in 5♂, 2.33–2.67 mm in 5♀, THL = 1.00– 1.13 mm in ♂, 0.93–1.17 mm in ♀, WL = 2.07–2.17 mm in ♂, 2.00– 2.23 mm in ♀, WW = 0.93–1.00 mm in ♂, 0.97–1.03 mm in ♀, arb = 6/2–4, avd = 0.82–1.00, adf = 1.57–1.86, flw = 1.71–2.33, FW/HW = 0.33–0.38, ch/o = 0.03–0.05, prorb = 0.62–0.73, rcorb = 0.64–0.80, vb = 0.30–0.50, dcl = 0.27–0.54, presctl = 0.40–0.58, sctl = 1.29–1.41, sterno = 0.67–0.80, orbito = 1.40–2.25, dcp = 0.29–0.39, sctlp = 1.00–1.20, C = 2.07–2.61, 4c = 1.13–1.48, 4v = 2.00–2.61, 5x = 1.75–2.27, ac = 2.29–2.92, M = 0.69–0.91, C3F = 0.72–0.79.
Specimens examined. CHINA: 2♀ (SCAU, Nos 128945, 46), Wulai, Hsinpei, Taiwan, 490m, 19.x.2012, ex tussock, HW Chen; 3♂, 3♀ (SCAU, Nos 128899, 128957–61), Yixiang, Puer, Yunnan, 22°45'N, 101°03'E, 1400m, 12.xii.2012, ex tussocks, HW Chen; 2♂, 3♀ (SCAU, Nos 128952–56), Muyiji Park, Ximeng, Yunnan, 1100m, 2.iv.2011, ex tussocks, YR Su, SJ Yan; 2♂, 2♀ (SCAU, Nos 128948–51), Hesong, Menghai, Yunnan, 1750m, 2.iv.2011, ex tussocks, SJ Yan; 1♀ (SCAU, No. 128947), Menglun, Mengla, Yunnan, 21°41'N, 101°25'E, 780m, 10.iv.2010, ex tree trunk, YR Su; 1♂ (SCAU, No. 128944), Wangtianshu, Mengla, Yunnan, 21°28'N, 101°38'E, 600m, 25.iv.2007, ex tussock, HW Chen.
Distribution. China (Taiwan, Yunnan), Nepal, Sri Lanka, Borneo, Malaysia (Cameron Highlands), Indonesia (Java).
description: Published as part of Huang, Jia, Su, Yirui & Chen, Hongwei, 2017, The genus Leucophenga (Diptera, Drosophilidae), part VII: the subpollinosa species group from China, with morphological and molecular evidence, pp. 201-245 in Zootaxa 4247 (3) on pages 221-223, DOI: 10.11646/zootaxa.4247.3.1, http://zenodo.org/record/438516