Review of Xenochironomus Kieffer, 1921 (Diptera: Chironomidae) with description of six new species Author Fusari, Lívia Maria Author Roque, Fabio De Oliveira Author Hamada, Neusa text Zootaxa 2013 3646 2 101 126 journal article 10.11646/zootaxa.3646.2.1 43771dd5-f8c6-4bbc-ab36-3f2b03c63f21 1175-5326 219502 A574552A-1208-4AB6-B3FA-9D6AAEFEB1E2 Key to the males of Xenochironomus [The species X. lacertus , X. flaviventris and X. longicrus were not included in the key because there are no diagnostic characters in their original descriptions.] 1. Setae of anal tergite distributed in one area................................................................. 2 - Setae of anal tergite distributed in two areas................................................................. 6 2. Inferior volsella with plumose setae....................................................................... 3 - Inferior volsella with simple setae........................................................................ 5 3. Sternite VI with large dark setae.......................................................................... 4 - Sternite VI without large dark setae........................................... Xenochironomus xenolabis (Kieffer) 4. Sternite VI with 14 setae. Superior volsella with microtrichia only in the inner region.................................................................................................. Xenochironomus trochanteratus (Thompson) - Sternite VI with 4 setae. Superior volsella completely covered by microtrichia............ Xenochironomus tuberosus Wang 5. Superior volsella exposed (visible)............................................ Xenochironomus amazonensis sp. n. - Superior volsella unexposed (located inside tergite IX)........................ Xenochironomus ugandae (Goetghebuer) 6. Setae in the latero-posterior region of tergite IX present............................... Xenochironomus alaidae sp. n. - Setae in the latero-posterior region of tergite IX absent........................................................ 7 7. Anal point long; apex of the anal point surpassing or just reaching the inferior volsella...... Xenochironomus mendesi sp. n. - Anal point short; apex of the anal point not surpassing or reaching the inferior volsella............................... 8 8. Inferior volsella wide; superior volsella long and curved ventrally.................... Xenochironomus ethiopensis sp. n. - Inferior volsella narrow; superior volsella short and straight.................................................... 9 9. Superior volsella fingerlike; inferior volsella with 2–3 setae at the apex............... Xenochironomus trisetosus (Kieffer) - Superior volsella pediform; inferior volsella with>3 setae at the apex........................................... 10 10. Gonocoxite with setae as long as the gonostylus; gonostyus rounded........................ Xenochironomus grini sp. n. - Gonocoxite with setae shorter than the gonostylus; gonostylus narrow apically................................... 11 11. Apex of the inferior volsella rounded............................................................................................. Xenochironomus ceciliae Roque et Trivinho-Strixino , Xenochironomus canterburyensis (Freeman) - Apex of the inferior volsella spatulate............................................. Xenochironomus martini sp. n.