Rheotanytarsus
Creators: name: Wang, Xinhua
name: Guo, Yuhong
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Rheotanytarsus

description: Key to males of Rheotanytarsus of China
1. Antenna with 12 flagellomeres .................................................................................... 2
­ Antenna with 13 flagellomeres .................................................................................... 3
2. Apical lamellae of median volsella bulbous (Fig. 5) ............................. R. bullus sp. n.
­ Apical lamellae of median volsella not bulbous (Fig. 7) ............... R. polychaetus sp. n.
3. Apex of anal point pointed; tergite IX bare (Fig. 13) ........................... R. apiculus sp. n.
­ Apex of anal point spatulate, as wide as its basal width, or at least rounded................ 4
4. Abdomen banded. Posterior margin of tergite IX lateral to anal point straight (Fig. 9). ................................................................................................................... R. liuae sp. n.
­ Abdomen evenly coloured. Posterior margin of tergite IX forming a triangular base for the anal point ................................................................................................................ 5
5. Median volsella long, reaching beyond apex of inferior volsella (Kyerematen & Saether 2000: Figs. 43–46) ................................ R. buculicaudus Kyerematen & Saether
­ Median volsella short, not reaching beyond apex of inferior volsella ......................... 6
6. Base of anal point with a tuft of setae (Fig. 15) ..................................... R. fundus sp. n.
­ Base of anal point without setal cluster ........................................................................ 7
7. Gonostylus tapering gradually to rounded apex ........................................................... 8
­ Gonostylus abruptly tapered in apical portion and with narrow apex ........................ 10
8. Superior volsella subtriangular (Fig. 18)....................................... R. brevipalpus sp. n.
­ Superior volsella oblong .............................................................................................. 9
9. Lamellae of median volsella fused into plate, anal point without anal crests (Sasa 1980: Fig. 11; Wang & Zheng 1993: Figs. 1–2; Kyerematen, Andersen & Saether 2000: Figs. 3 A–D) .......................................................................... R. tamaquartus Sasa
­ Lamellae of median volsella not fused into plate, anal point with well developed crests (Tokunaga 1938: Fig. 31; Chaudhuri et al 1994: Figs. 2–3; Kyerematen, Andersen & Saether 2000: Figs. 1 A–D; Sasa & Kikuchi 1986: Fig. 3 J; Wang & Zheng 1993: Fig. 4) ................................................................................................. R. aestuarius (Tokunaga)
10. Gonostylus recurved at apex ...................................................................................... 11
­ Gonostylus not recurved at apex ................................................................................ 12
11. Superior volsella with bluntly rounded apical projection (Johannsen 1932: Fig. 37; Chaudhuri, Datta & Mazumdar 1994: Fig. 1; Kyerematen, Andersen & Saether 2000: Figs. 2 D–G; Wang & Zheng 1993: Figs. 5–6) .......................... R. acerbus (Johannsen)
­ Superior volsella rounded (Fig. 2) ......................................................... R. aphelus sp. n.
12. Superior volsella rectangular. Median volsella with almost all lamellae fused into plate (Fig. 11) .................................................................................... R. quadratus sp. n.
­ Superior volsella subtriangular or bean­shaped. Median volsella with apical foliate
setae fused into plate and markedly recurved with sickle­shaped apex ..................... 13 13. Superior volsella with posterior margin produced giving a hook­like projection (Lehman 1970: Figs. 11–13; Albu 1980: Fig. 191; Wang and Zheng 1993: Fig. 3) .............. .............................................................................................. R. muscicola Thienemann ­ Superior volsella rectangular and with rounded margin ............................................ 14
14. Anal point spatulate (Sasa 1980: Fig. 8) .......................................... R. tamatertius Sasa
­ Anal point narrow at apex (Tokunaga 1938: Fig. 29; Lehmann 1970: Figs. 9–10) ....... ................................................................................................... R. pentapodus (Kieffer)
description: Published as part of Wang, Xinhua & Guo, Yuhong, 2004, A review of the genus Rheotanytarsus Thienemann & Bause from China (Diptera: Chironomidae: Tanytarsini), pp. 1-19 in Zootaxa 650 on pages 16-17, DOI: 10.5281/zenodo.158146