Search for a command to run...
Dasymallomyia dentata sp. nov. Figs 6, 7 Material examined. Holotype: China – Hubei Prov. • ♂; Shennongjia, Xiaolongtan; 28 Jun. 2023, Jiuzhou Liu (light trap); CAU. Diagnosis. Yellowish species. Prescutum and presutural scutum polished, with one black median stripe and two pairs of lateral black spots; two large dark spots on each scutal lobe. Wing unpatterned. Abdomen mainly brown. Gonocoxite apically with blackened denticles. Outer gonostylus blade-shaped, shrunken at middle, with darkened, obtuse tip. Inner gonostylus black; anterior branch, short, nearly trapezoidal; posterior branch blackened apically and bent outward, tip with small lateral lobe. Description. Male. Body length 5.5 mm, wing length 6.2–6.5 mm, antenna length 1.7–1.9 mm. Head (Fig. 6 A, B). Mostly brownish with pale gray microtrichia. Antenna mostly brown except scape and two basal brownish-yellow flagellomeres. Scape cylindrical, nearly twice longer than wide; flagellum 14 - segmented with long verticils, about 2–3 times as long as the corresponding segment; flagellomeres oval. Proboscis brownish with brown setae; palpi brownish with brown setae. Thorax (Fig. 6 A, C). Generally yellow, distinctly polished on prescutum and presutural scutum. Pronotum brownish with a pale-yellow area posteriorly. Prescutum and presutural scutum yellow with a brown median stripe and two pairs of brown spots near median stripe; median stripe of almost same width in whole length, not reaching transverse suture; anterior lateral spots small, stripe-shaped, partly fused with posterior spots. Scutum yellow, with two large subtriangular black spots on each scutal lobe, narrowly separated from or partly fused with each other, posterior one distinctly smaller than anterior one. Scutellum brown with a large yellow area in the middle. Mediotergite brown. Pleura brown to brownish on propleuron, anepisternum, anepimeron, dorsal and ventral margins of katepisternum, ventral half of meron and laterotergite. Setae on thorax brown. Legs mostly yellow; fore coxa and trochanter mainly brownish; femora with subterminal brownish ring nearly as long as wide; tips of tibiae and tarsi brownish. Setae on legs brownish black. Wing (Fig. 6 D) yellowish hyaline, unpatterned. Veins mostly brownish, paler on Sc and base of vein R. Venation: R 2 ending at fork of R 3 + 4; R 3 about 1 / 3 as long as R 4; cell m 1 + 2 about twice as long as its petiole, origin of M 1 + 2 + 3 obtuse and curved. Halter 0.8–0.9 mm long, pale yellow. Abdomen (Fig. 6 A). Generally brown, posterior margin of sternites brownish yellow. Setae on abdomen brownish yellow. Hypopygium (Figs 6 E, 6 F, 7). Posterior margin of tergite 9 slightly convex (Figs 6 E, 7 A). Sternite 9 strongly convex at middle (Figs 6 F, 7 B). Gonocoxite longer than tergite 9, basally broad, tip with one larger preapical and three smaller apical blackened denticles (Figs 6 E, 6 F, 7 A, 7 B). Outer gonostylus blade-shaped, subhyaline, darkened at tip, strongly shrunken at middle (Fig. 7 D). Inner gonostylus weakly bifid (Fig. 7 C); anterior branch sclerotized, distinctly elongated, nearly trapezoidal; posterior branch blackened apically and bent outward, its apex bearing a distinct, small lateral lobe. Aedeagus (Fig. 7 E, F) subconical in dorsal view, its short, darkened tip directed posteroventrally, with some setae near tip. Female. Unknown. Distribution. China (Hubei). Etymology. The specific name refers to the toothed gonocoxite. Remarks. This new species is similar to D. compacta Alexander, 1964 (India, Sikkim) in the general morphology of the gonocoxite and inner gonostylus. It differs, however, in the following characters: the outer gonostylus broadens apically, whereas in D. compacta it remains slender throughout with a narrow apex; on the gonocoxite, the largest spine is set farthest from the other spines, while in D. compacta all spines are closely aggregated (Alexander 1964: fig. 15).