Chrysosoma ruyuanense Zhu & Yang 2005, sp. nov.
Creators: name: Zhu, Yajun
name: Yang, Ding
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Chrysosoma
Chrysosoma ruyuanense

description: Chrysosoma ruyuanense sp. nov.
(Figs. 4–5)
Diagnosis. Antenna brownish yellow; frons with group of 5–6 long thick pale hairs on postero­lateral slope; FI with row of long pale ventral hairs (as long as width of FI).
Description. Male body length 5.4–5.9 mm, wing length 5.5 mm.
Head metallic green with pale gray pollen; vertex distinctly excavated, frons subshining. Hairs and bristles on head black; middle and lower postocular bristles (including postero­ventral hairs) pale; frons with 1 pvt and 1 group of 5–6 long thick pale hairs on postero­lateral slope, ocellar tubercle with 2 long strong oc. Antenna brownish yellow; scape somewhat swollen; pedicel with circlet of apical bristles (including 2 long ventral bristles); first flagellomere triangular, nearly as long as wide; arista apical, blackish except narrow base brown, slightly longer than head + thorax. Proboscis dark yellow with brownish hairs; palpus dark yellow with brownish hairs.
Thorax metallic green with pale gray pollen. Hairs and bristles on thorax black; 2 strong posterior dc and 3 anterior hairs; 3 long irregularly paired acr; scutellum with 2 pairs of sc, basal pair very short and hair­like. Legs yellow brown; CI yellow, CII and CIII blackish; t 2­5 brown. Hairs and bristles on legs black; coxae with pale hairs; CI with 2 yellow spine­like apico­lateral bristles. Femora with long pale ventral hairs: FI with row of long pale ventral hairs (as long as width of FI); FII and FIII with row of short pale ventral hairs on basal half (as long as width of FII and FIII). TI with 1 short ad at basal 1/7, apically with 1 short bristle; TII with 1 long strong ad at basal 1/5, 3 av and 1 pd at basal 1/3, apically with 3 long bristles; TIII with 1 long ad at basal 1/6, 10 av and 9 pd, apically with 2 long bristles. TI apical 1/4 and It 1 basal half somewhat flattened with very short dense ventral pubescence (Fig. 4). Relative lengths of tibia and tarsomeres: LI 3.2: 2.6: 0.9: 0.7: 0.4: 0.3; LII 3.9: 3.5:?:?:?:?; LIII 4.0: 3.3:?:?:?:?. Wing: hyaline, tinged with brown; veins dark brown, M 1 concave, crossvein m­cu straight. Squama dark yellow. Halter brownish yellow with pale knob.
Abdomen dark metallic green with gray pollen. Hairs and bristles on abdomen black, but sterna 1–2 with pale hairs.
Male genitalia (Fig. 5): Epandrium distinctly much longer than wide with 1 lateral hair; surstylus rather thick with 3 apical bristles, basally with a short lateral process; hypandrium rather thick with narrow left lateral arm; aedeagus thick; cercus furcate.
Female. Unknown.
Type material. Holotype male, Guangdong: Ruyuan, 23°20’N, 115°23’E, 24. 07. 2003, leg. Xinyue Liu. Paratype 1 male, same data as holotype.
Distribution. China (Guangdong).
Etymology. The specific name refers to the type locality Ruyuan.
Remarks. The new species is similar to C. jinpinganum, but can be separated from the latter by the metallic green thorax. In C. jinpinganum, the thorax is yellow.
description: Published as part of Zhu, Yajun & Yang, Ding, 2005, New species of Chrysosoma Guérin-Méneville (Diptera: Dolichopodidae), with a key to Chinese species, pp. 47-60 in Zootaxa 1029 (1) on pages 52-53, DOI: 10.11646/zootaxa.1029.1.4, http://zenodo.org/record/5050265