Xestochironomus Sublette et Wirth 1972
Creators: name: Pinho, Luiz Carlos
name: Souza, João Francisco
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Xestochironomus

description: Key to adult males of Xestochironomus Sublette et Wirth, 1972
1. Gonostylus with simple, tapering apex.................................................................... 2
- Gonostylus forked, at least with low mesial lobe............................................................ 11
2. Abdominal segments uniformly pale, straw yellow or brown, without contrasting darker crossbands.................... 3
- Abdominal segments pale to yellow, with brown crossbands on tergites II–V, sometimes I–VII........................ 8
3. Posnotum with no pigmentation......................................................................... 4
- Posnotum with pigmentation, at least pale brown............................................................ 5
4. Anal point moderately bulbous, apex about 1.5x wider than base. AR 0.79.................................................................................................... Xestochironomus ankylis Sublette et Sasa (1994: 51)
- Anal point markedly bulbous, apex about 3x wider than base. AR 1.25–1.53........................................................................................................ Xestochironomus subletti Borkent (1984: 25)
5. Lateral vittae light to medium brown, contrasting with predominantly pale remaining areas of thorax................... 6
- Thorax entirely pale (except for postnotum), or entirely brown................................................ 7
6. AR lower than 0.90..................................... Xestochironomus dominicanus Sublette et Wirth (1972: 10)
- AR 1.20–1.45................................... Xestochironomus aisenensis Andersen et Kristoffersen (1998: 296)
7. Body pale, except for posnotum very pale brown.......................... Xestochironomus gilvus Borkent (1984: 27)
- Body completely brown............................................. Xestochironomus virgoferreae sp. n. (Fig. 2)
8. Anal point bulbous.................................................................................... 9
- Anal point parallel-sided.............................................................................. 10
9. Lateral vittae and ventral portion of preepisternum brown. Hind tibia pale brown................................................................................................... Xestochironomus brunneus Borkent (1984: 28)
- Lateral vittae and ventral portion of preepisternum with no pigmentation. Hind tibia darker brown...................................................................................... Xestochironomus latilobus Borkent (1984: 29)
10. Superior volsella with swollen apex.................................. Xestochironomus bulbosus Borkent (1984: 27)
- Superior volsella with slender apex............................. Xestochironomus comptus Sublette et Wirth (1972: 9)
11. Apex of gonostylus markedly forked, with deep concavity between thumb-like lobes.............................. 12
- Apex of gonostylus slightly forked, with low concavity between not thumb-like lobes.............................. 14
12. Abdomen yellowish, without dark crossbands.............................................................. 13
- Abdomen with dark crossbands................. Xestochironomus furcatus (Johannsen), see Sublette & Wirth (1972: 12)
13. Thorax brownish yellow, legs yellowish..................... Xestochironomus luteifurcatus Sublette et Wirth (1972: 14)
- Thorax yellow, legs uniformly brown............................. Xestochironomus flinti Sublette et Wirth (1972: 10)
14. Abdomen yellowish, without dark crossbands.............................................................. 15
- Abdomen with dark crossbands......................................................................... 16
15. Anal point slender, parallel sided; superior volsella curved; gonostylus gradually broadened distally, with low, rounded mesial lobe subapically............................................. Xestochironomus hobbsi Sublette et Wirth (1972: 13)
- Anal point spatulate; superior volsella hooked; gonostylus slender, pointed, with low, triangular mesial lobe subapically................................................... Xestochironomus laselvensis Andersen et Kristoffersen (1998: 301)
16. Lateral lobe of gonostylus overreaching mesial lobe.................................................................................................................. Xestochironomus nebulosus Sublette et Wirth (1972: 15)
- Lateral lobe of gonostylus not overreaching mesial lobe.......................................................................................................................... Xestochironomus dickinsoni sp. n. (Fig. 1)
description: Published as part of Pinho, Luiz Carlos & Souza, João Francisco, 2013, New species of Xestochironomus Sublette et Wirth, 1972 (Diptera: Chironomidae) from Atlantic Forest, Brazil, pp. 595-600 in Zootaxa 3652 (5) on page 598, DOI: 10.11646/zootaxa.3652.5.9, http://zenodo.org/record/217044