Zygoneura
Creators: name: Zhang, Su-Jiong
name: Wu, Hong
name: Huang, Junhao
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sciaridae
Zygoneura

description: Key to the species of Zygoneura (Palaearctic and Oriental regions, male)
(Mamaev 1968, 1976, 1985; Mohrig et al. 1990; Yang & Zhang 1990; Sasakawa 1997; Menzel & Mohrig 2000; Rudzinski 2005)
1. Flagellomere neck 1/2 as long as the body. The base of M1 weakly bowed (subgenus Allozygoneura) ...................... 2
- Flagellomere neck nearly as long as the body. The base of M1 strongly bowed .......................................................... 3
2. Gonostylus with two megasetae ................................................................................................................ Z. petasitidis
- Gonostylus with five megasetae ..................................................................................................................... Z. calthae
3. Setae long subequal in length on flagellomeres (Fig. 3 A). Ventral mesial margin of gonocoxa with two groups of weak setae (Fig. 3 E). Gonostylus with 2–3 megasetae (subgenus Zygoneura)............................................................ 4
- Setae mostly short on flagellomeres, except a longer row near the flagellomere neck (Fig. 1 A, 2A). Ventral mesial margin of gonocoxa with two distinct groups of setae (Fig. 1 E, 2E) Gonostylus with two megasetae (subgenus Pharetratula)................................................................................................................................................................. 7
4. Gonostylus with two megasetae ................................................................................................................... Z. sajanica
- Gonostylus with three megasetae ................................................................................................................................. 5
5. Gonostylus oblong, not attenuated at apex (Fig. 2 F).................................................................................................... 6
- Gonostylus oval, attenuated at apex (Fig. 3 F). ............................................................................... Z. occidens sp. nov.
6. Gonostylus with two megasetae arising from apical forth and another megasetae at the apical third of the gonostylus ...................................................................................................................................................................... Z. sciarina
- Gonostylus with one short megaseta arising from apical forth and two other long megasetae at the apical third, close to each other ................................................................................................................................................... Z. mohrigi
7. The two megasetae close to each other on gonostylus, both at the subapical or middle part....................................... 8
- The two megasetae widely apart on the gonostylus, with the distance at least longer than the length of the megasetae .................................................................................................................................................................................... 10
8. The two megasetae of the gonostylus at the subapical part are subequal in length...................................................... 9
- The two megasetae of the gonostylus at the middle part are of unequal in length (Fig. 1 F) ......... Z. disparilis sp. nov.
9. Gonostylus with megasetae on long dorsal lobe, about two times as long as the megasetae .................... Z. flavicornis
- Gonostylus with megasetae on short dorsal lobe, nearly as long as the megasetae ....................................................... ......................................................................................................................................................................... Z. bidens
10. Gonostylus stout, with two megasetae subequal length ............................................................................................. 11
- Gonostylus slender, with two megasetae of unequal length (Fig. 2 F)................................................ Z. longa sp. nov.
11. Gonostylus with megasetae at the apical third and middle parts .............................................................. Z. transferata
- Gonostylus with megasetae at apical third and basal parts......................................................................................... 12
12. Ventral mesial margin of the gonocoxa with pair of distinct lobes. Gonostylus with two megasetae near the dorsal side ........................................................................................................................................................ Z. subdivergens
- Ventral mesial margin of gonocoxa without distinct lobes. Gonostylus with two megasetae near the ventral side ...... .................................................................................................................................................................... Z. divergens
description: Published as part of Zhang, Su-Jiong, Wu, Hong & Huang, Junhao, 2010, The genus Zygoneura Meigen in China, with descriptions of three new species (Diptera, Sciaridae), pp. 40-48 in Zootaxa 2368 on page 41, DOI: 10.5281/zenodo.193685