Leucophenga brevipenis Huang & Chen, 2018

Huang, Jia, Wang, Yalian, O’Grady, Patrick Michael, Su, Yirui & Chen, Hongwei, 2018, The genus Leucophenga (Diptera, Drosophilidae), part VIII: twenty-one species from the Oriental region, with morphological and molecular evidence, Zootaxa 4503 (1), pp. 1-70 : 42-43

Leucophenga brevipenis Huang & Chen , sp. nov.

( Figs. 3B, 6J–L, 10C, 14G, 14H, 25)

Diagnosis. This species differs from the other species of the genus Leucophenga in having the epandrium entirely lacking seta ( Fig. 25A); aedeagus subdorsolaterally with two long, subparallel processes; the thicker process bearing a sensillum at tip ( Fig. 25D).

Description. Ocellar triangle dark brown, with ca. 2 setae above ocellar setae. Postocellar setae minute ( Fig. 6J). Frons brownish ( Fig. 6J). Orb 3 and Orb 2 parallel ( Fig. 6J). Pedicel brownish yellow to brownish; first flagellomere dark yellow ( Fig. 6J). Clypeus entirely brownish yellow. Palpus brownish yellow ( Fig. 6J). Mesonotum mostly brownish yellow ( Fig. 6K). Postpronotal lobe dark yellow ( Fig. 6L). Acrostichal setulae in ca. 12–14 irregular rows ( Fig. 6K). Scutellum mostly brownish yellow ( Fig. 6K). Pleura, katepisternum, and mesopleuron mostly dark yellow ( Fig. 6L). Wing ( Fig. 3B): entirely hyaline ( Fig. 3B); costal vein between R 2+3 and R 4+5 distally with ca. 6 or 7 peg-like spinules on ventral surface; R 4+5 and M 1 slightly convergent distally; halter yellowish, usually with brownish yellow patches at stem and knob ( Fig. 6K). Abdominal tergites black, 2nd tergite yellow medially and laterally, 3rd tergite not shortened, yellow anteriorly and laterally, 4th tergite yellow anteriorly ( Fig. 10C). Male terminalia: Epandrium, cercus, and surstylus lacking pubescence ( Fig. 25A). Hypandrium with 1 sensillum ( Fig. 25B). Paramere narrow basally and apically, with ca. 3 sensilla medially and ca. 13 ones distally ( Fig. 25C).

Measurements and indices. BL = 4.00 mm in holotype (range in 3♂ and 1♀ paratypes: 3.33–3.67 in ♂, 3.03 in ♀), ThL = 1.80 mm (1.63–1.73 in ♂, 1.57 in ♀), WL = 2.87 mm (2.70–2.83 in ♂, 2.73 in ♀), WW = 1.38 mm (1.30–1.33 in ♂, 1.20 in ♀), arb = 8/5 (7–8/4–5), avd = 0.93 (0.86–0.94), adf = 1.88 (2.27–2.43), flw = 1.75 (1.87– 2.14), FW/HW = 0.31 (0.30–0.33), ch/o = 0.02 (0.03–0.03), prorb = 0.65 (0.64–0.68), rcorb = 0.80 (0.79–0.82), vb = 0.45 (0.53–0.56), dcl = damaged (0.46–0.50), presctl = damaged (0.50–0.52), sctl = damaged (1.18–1.26), sterno = damaged (0.83–0.88), orbito = 1.06 (1.06–1.14), dcp = 0.27 (0.30–0.34), sctlp = 1.03 (1.13–1.29), C = 1.88 (1.90–2.04), 4c = 1.24 (1.21–1.32), 4v = 1.69 (1.62–1.76), 5x = 1.11 (1.06–1.22), ac = 3.06 (2.88–3.40), M = 0.50 (0.49–0.52), C3F = 0.71 (0.71–0.75).

Type specimens. Holotype ♂ ( SCAU, No. 128605), CHINA: Guanlei, Mengla , Yunnan, 21°38'N, 101°10'E, alt. 562m, 20.iv.2016, ex tussock, J Huang . Paratypes: CHINA: 3♂ ( SCAU, Nos 128606–08), same data as holotype ; 1♀ ( SCAU, No. 128609), Wangtianshu, Mengla , Yunnan, 21°28'N, 101°38'E, alt. 570m, 12.xi.2012, ex tussock, JJ Gao .

Distribution. China (Yunnan).

Etymology. A combination of the Latin words: “ brevis ” (= short) and “ penis ” (= aedeagus), referring to the short aedeagus.