Chrysosoma Guerin-Meneville 1831
Creators: name: Zhu, Yajun
name: Yang, Ding
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Chrysosoma

description: Key to species (males) of Chrysosoma from China
1. Wing with dark brown maculation, continuous along anterior margin, with excavation from posterior margin.................................................................................................... 2
­ Wing hyaline or with subapical spot or clouding near costa......................................... 5
2. Antenna black or brownish black.................................................................................. 3
­ Antenna yellow; cercus widely furcate ............................ Chrysosoma cupido (Walker)
3. CI yellow ....................................................................................................................... 4
­ All coxae black; cercus widely furcate ............ Chrysosoma dalianum Yang et Saigusa
4. Crossvein m­cu straight… ................................................ Chrysosoma chinense Becker
­ Crossvein m­cu strongly bent; cercus long and finger­like............................................. ........................................................................... Chrysosoma serratum Yang et Saigusa
5. Flagellum and arista separated ...................................................................................... 6
­ Flagellum and arista fused; cercus with digitiform dorsal projection and bilobed ventral arm ................................................................ Chrysosoma crinicorne (Wiedemann)
6. TIII with an excavated swollen callus at base............................................................... 7
­ TIII tibia without swollen callus ................................................................................... 8
7. Arista with apical flag; IIt 4­5 normal; cercus slender with 2 dorsal projections at base and 1 sub­apically .............................................. Chrysosoma globiferum (Wiedemann)
­ Arista simple; IIt 4­5 flattened with white hairs; cercus furcated apically......................... ........................................................................... Chrysosoma leucopogon (Wiedemann)
8. Arista with apical flag ................................................................................................... 9
­ Arista simple… ........................................................................................................... 11
9. Antenna black….......................................................................................................... 10
­ Antenna yellow; cercus widely furcated, ventral lobe also furcated apically ................. ......................................................................................... Chrysosoma piriforme Becker
10. CI yellow; cercus slender .................................................. Chrysosoma hainanum Yang
­ CI blackish; cercus short and furcated (Fig. 10) ... Chrysosoma zengchengense sp. nov.
11. CI black ....................................................................................................................... 12
­ CI yellow .....................................................................................................................18
12. Abdomen without dense cream­clouded hairs ventrally ............................................. 13
­ Abdomen with dense cream­clouded hairs ventrally; cercus widely furcated, ventral lobe apically trifurcated .................................................. Chrysosoma floccosum Becker
13. Femora yellow............................................................................................................. 14
­ Femora chiefly black................................................................................................... 17
14. Palpus black or blackish… .......................................................................................... 15
­ Palpus yellowish; cercus furcated apically Chrysosoma cyaneculiscutum Bickel et Wei
15. Arista nearly as long as head + thorax… .................................................................... 16
­ Arista much longer than head + thorax; cercus furcated apically (Fig. 3)...................... ................................................................................... Chrysosoma nanlingense sp. nov.
16. FI with long pale ventral hairs on basal half; cercus subrectangular, long and rather thick ............................................................................ Chrysosoma crassum Yang et Saigusa
­ FI with short pale ventral hairs on basal half; cercus apically furcated into several finger­like processes ...................... Chrysosoma guangdongense Zhang, Yang et Grootaet
17. Arista nearly as long as head + thorax; cercus without dorsal projection (Fig. 7).......... .................................................................................... Chrysosoma shixingense sp. nov.
­ Arista much longer than head + thorax; cercus with short digitiform dorsal projection ....................................................................................... Chrysosoma guizhouense Yang
18. It 1 somewhat thick with plumose lateral hairs............................................................. 19
­ It 1 normal..................................................................................................................... 20
19. Thorax mainly dark yellow; cercus slender Chrysosoma jinpinganum Yang et Saigusa
­ Thorax mainly metallic green; cercus long and furcated apically (Fig. 5) ..................... .................................................................................... Chrysosoma ruyuanense sp. nov.
20. Arista longer than head + thorax ................................................................................. 21
­ Arista shorter than head + thorax ................................................................................ 24
21. CII yellow.................................................................................................................... 22
­ CII black; cercus with short digitiform dorsal projection and long bilobed clavate ventral arm ....................................................................... Chrysosoma hangzhouense Yang
22. Thorax mainly metallic green ..................................................................................... 23
­ Thorax mainly yellow; cercus long and finger­like ........................................................ .................................................................................. Chrysosoma xanthodes Yang et Li
23. CIII yellow; surstylus with 3 ventral processes .............................................................. ....................................................................... Chrysosoma yunnanense Yang et Saigusa
­ CIII black; surstylus with apical denticles ... Chrysosoma pallipilosum Yang et Saigusa
24. All coxa yellow; cercus subtriangular .......... Chrysosoma luchunanum Yang et Saigusa
­ CI yellow, CII and CIII black; cercus long with thin and curved apex ........................... .......................................................................................... Chrysosoma insensibile Yang
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 48-50, DOI: 10.11646/zootaxa.1029.1.4, http://zenodo.org/record/5050265