Chrysotimus huairouensis
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Ordo: Diptera
Familia: Dolichopodidae
Genus: Chrysotimus
Name
Chrysotimus huairouensis Wang, Chen & Yang sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Diagnosis
First flagellomere somewhat trapeziform, about 0.8 times as long as wide. Acr absent. Hind tibia with 1 ad, 3 pd and row of v. Hind tarsomere 1 with 18–20 short and thick black ventral bristles at base. Epandrium apically with wide lateral process, process truncate apically; surstylus curved and somewhat swollen apically.
Description
Male. Body length 2.1–2.3 mm, wing length 2.0–2.3 mm.
Head metallic green with gray pollen; frons and face brilliant. Hairs and bristles on head yellow. Ocellar tubercle weak, with 2 very long oc and 2 very short posterior hairs. Lower postocular bristles (including ventral hairs) pale. Antenna (Fig. 4) blackish; first flagellomere blackish, somewhat trapeziform, rather short, about 0.8 times as long as wide; arista dorsal, with basal segment very short. Proboscis dark brown, with blackish hairs; palpus pale yellow, with pale hairs and 2 pale yellow apical bristles.
Thorax metallic green with pale gray pollen, mesonotum and scutellum brilliant. Hairs and bristles on thorax yellow; 6 dc, no acr; scutellum with 2 pairs of bristles. Propleuron with 1 pale bristle on lower portion. Legs including coxae yellow with 5th tarsomere brown. Hairs and bristles on legs brown; coxae with yellowish hairs and bristles; mid and hind coxae each with 1 brown outer bristle. Mid and hind femura each with 1 av apically. Mid tibia with 2 ad and 2 pd, apically with 4 bristles; hind tibia with 1 ad, 3 pd and one row of v, apically with 3 bristles. Hind tarsomere 1 with 18-20 short and thick black ventral bristles at base. Relative lengths of tibia and 5 tarsomeres of legs. LI 3.2 : 2.2 : 0.9 : 0.7 : 0.6 : 0.6; LII 4.2 : 2.6 : 0.9 : 0.6 : 0.4 : 0.3; LIII 5.6 : 2.4 : 1.3 : 1.0 : 0.7 : 0.6.
Winghyaline; veins brownish, R4+5 and M parallel apically; CuAx ratio 0.23. Squama pale yellow with yellow hairs. Halter pale yellow.
Abdomen metallic green with pale gray pollen, dorsum brilliant, sterna 1-4 yellow. Hairs and bristles on abdomen yellow.
Male genitalia (Figs 5–6) dark brown: Epandrium distinctly longer than wide, apically with wide lateral process, process truncate apically; surstylus long and finger-like, curved and somewhat swollen apically; cercus round, with moderately long hairs; hypandrium shorter than epandrium.
Female. Unknown.
Type material
Holotype ♂, Beijing: Huairou, Labagou (40°32'N, 116°63'E), 29.VII.2009, Yan Li. Paratype 1 ♂, same data as holotype. Type specimens are stored in 75% ethanol.
Distribution
Known only from the type locality in Beijing.
Remarks
This new species is similar to Chrysotimus dorsalis Yang, but may be separated from the latter by the single row of v on the hind tibia, and slender surstylus. In Chrysotimus dorsalis, the hind tibia lacks row of v, and the surstylus is wide (Yang 2001[1]).
Etymology
The specific epithet derives from the type locality Huairou (Beijing).
Original Description
- Wang, M; Chen, H; Yang, D; 2012: Species of the genus Chrysotimus Loew from China (Diptera, Dolichopodidae) ZooKeys, 199: 1-12. doi
Other References
- ↑ Yang D (2001) Dolichopodidae. In: Wu H Pan C (Eds) Insects of Tianmushan national natural reserve. Science Press, Beijing, 429-441.
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