Leucophenga flavicosta Duda, 1926

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, Zootaxa 4247 (3), pp. 201-245 : 218-219

publication ID	https://doi.org/ 10.11646/zootaxa.4247.3.1
publication LSID	lsid:zoobank.org:pub:0C795602-87DE-412D-ADE4-153702AA887B
DOI	https://doi.org/10.5281/zenodo.5665923
persistent identifier	https://treatment.plazi.org/id/8C46016E-FFBF-FFFA-FEF0-FBEEFEB60785
treatment provided by	Plazi
scientific name	Leucophenga flavicosta Duda, 1926
status

Treatment

Leucophenga flavicosta Duda, 1926 View in CoL

( Figs. 2 View FIGURE 2 B, 3C, 3D, 7C, 11)

Leucophenga subpollinosa var. flavicosta, Duda, 1926: 53 View in CoL .

Leucophenga flavicosta Bächli, 1971: 59 View in CoL ; Lin & Wheeler, 1972: 245; Okada, 1987: 679.

Diagnosis. This species differs from the other species of the subpollinosa group by having the wing fuscous along R1 only ( Fig. 2 View FIGURE 2 B), the halter yellow at base and stem, mostly dark brown at knob ( Fig. 3 View FIGURE 3 C, D), and the aedeagus slightly concaved on posteroventral 1/3, ventrolaterally with a thin process bearing a sensillum at tip ( Fig. 11 View FIGURE 11 D).

However, the only male specimen shows distinctly difference from the latest and most relevant descriptions about L. flavicosta (from Taiwan, China in Lin & Wheeler 1972; from Palau in Okada 1987) in the color patterns of abdominal tergites ( Fig. 7 View FIGURE 7 C), while the aforementioned characters of wing ( Fig. 2 View FIGURE 2 B) and halter ( Fig. 3 View FIGURE 3 C, D) are consistent with their descriptions ( Lin & Wheeler 1972; Okada 1987), which are unique in the subpollinosa group. Therefore, the only male specimen was identified as L. flavicosta to avoid further confusion.

Description. Ocellar triangle brown, with ca. 2 setae above ocellar setae. Frons brownish yellow, with three indistinct, brownish, longitudinal stripes medially and laterally. Pedicel and first flagellomere brownish yellow. Clypeus brownish yellow medially, brownish laterally. Palpus brownish yellow. Mesonotum brownish yellow, with three brown, longitudinal stripes medially and sublaterally ( Fig. 3 View FIGURE 3 C). Postpronotal lobe yellow ( Fig. 3 View FIGURE 3 D). Acrostichal setulae in ca. 10–12 irregular rows ( Fig. 3 View FIGURE 3 C). Scutellum entirely brown ( Fig. 3 View FIGURE 3 C). Pleura, katepisternum and meron mostly brown above ( Fig. 3 View FIGURE 3 D). Wing ( Fig. 2 View FIGURE 2 B): Costal vein between R2+3 and R4+5 distally with ca. 5 peg-like spinules on ventral surface. Abdominal tergites dark brown ( Fig. 7 View FIGURE 7 C), with a pair of yellow patches submedially between 2nd to 3rd tergites. Male terminalia: Epandrium with ca. 1 seta near posterior margin per side ( Fig. 11 View FIGURE 11 A). Surstylus rounded apically ( Fig. 11 View FIGURE 11 A). Paramere with ca. 7 sensillum submediodorsally ( Fig. 11 View FIGURE 11 C).

Measurements. BL = 2.53 mm, THL = 1.07 mm, WL = 2.10 mm, WW = 0.97 mm, arb = 6/3, avd = 0.83, adf = 1.71, flw = 1.86, FW/HW = 0.40, ch/o = 0.02, prorb = 0.59, rcorb = 0.59, vb = 0.33, dcl = 0.46, presctl = 0.54, sctl = 1.42, sterno = 0.87, orbito = 1.80, dcp = 0.32, sctlp = 1.09, C = 1.89, 4c = 1.31, 4v = 2.14, 5x = 1.54, ac = 2.38, M = 0.69, C3F = 0.89.

Specimens examined. CHINA: 1♂ ( SCAU, No. 128964), Haoping, Ziyang , Shaanxi, 470m, 16.viii.2003, ex tussock, JJ Gao.

Distribution. China (Shaanxi, Taiwan), India, Palau, Micronesia, Borneo, New Guinea (Madang), Indonesia (Java, Sumatra).

Kingdom	Animalia
Phylum	Arthropoda
Class	Insecta
Order	Diptera
Family	Drosophilidae
Genus	Leucophenga