Cryptotendipes Lenz

Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, Zootaxa 1086, pp. 1-24 : 20-21

Key to males of Cryptotendipes Lenz

1. Inner margin of gonostylus with basal or median projection........................................ 2

­ Inner margin of gonostylus without projection ........................................................... 19

2. Inner margin of gonostylus with median projection ..................................................... 3

­ Inner margin of gonostylus with basal projection....................................................... 11

3. Anal point short, not longer than superior volsella ....................................................... 4

­ Anal point relatively long, longer than superior volsella .............................................. 5

4. Superior volsella columniform and straight, anal point rounded at apex........................ ................................................................. C. nigronitens ( Edwards, 1929) (Palaearctic)

­ Superior volsella digitiform and curved, anal point pointed at apex .............................. ......................................................................... C. pflugfelderi Reiss, 1964 (Palaearctic)

5. Anal point with setae in basal half ................................................................................ 6

­ Anal point entirely without setae .................................................................................. 7

6. AR 2.4, superior volsella with 2 apical setae and without lateral setae .......................... ....................................................................... C. usmaensis ( Pagast, 1931) (Palaearctic)

­ AR 1.58, superior volsella with 1 apical seta and 2 lateral setae .................................... .............................................................. C. tobatertius Kikucki & Sasa, 1990 (Oriental)

7. Superior volsella without microtrichia ............... C. emorsus ( Townes, 1945) (Nearctic)

­ Superior volsella with microtrichia ............................................................................... 8

8. Anal tergite with high ridge ............................ C. casuarius ( Townes, 1945) (Holarctic)

­ Anal tergite without ridge.............................................................................................. 9

9. Superior volsella distinctly bilobed C. daktylos (Walley in Curran, 1934) (Neotropical)

­ Superior volsella not bilobed....................................................................................... 10

10. Superior volsella curved, swollen at apex and truncate, anal point tapering to point..... .............................................................................. C. pilicuspis Saether, 1977 (Nearctic)

­ Superior volsella straight, not swollen at apex, anal point parallel­sided to point.......... ..................................................................................... C. parallelus sp. n. (Palaearctic)

11. Tergite IX with pair of dorsal or ventral lobes ............................................................ 12

­ Tergite IX without lobes.............................................................................................. 14

12. Frontal tubercles absent, superior volsella pointed at apex, without microtrichia.......... .......................................................... C. tobasecundus Kikucki & Sasa, 1990 (Oriental)

­ Frontal tubercles present, superior volsella obtuse at apex, covered by microtrichia.13

13. Bands of tergite IX joined, superior volsella constricted in middle, widened at apex.... ............................................................................... C. acalcar Reiss, 1990 (Palaearctic)

­ Bandsoftergite IXseparated,superior volsellaslightly swollen in middle,roundedat apex .................................................... C. mongolkeleus ( Sasa & Suzuki, 1997) (Palaearctic)

14. Tergite IX with distinct caudolateral shoulders ... C. darbyi ( Sublette, 1960) (Holarctic)

­ Tergite IX without caudolateral shoulders .................................................................. 15

15. Superior volsella covered by microtrichia .................................................................. 16

­ Superior volsella without microtrichia........................................................................ 17

16. AR 2.26–2.66, superior volsella twice as wide at base as at middle, gonostylus obtuse at apex ........................................ C. mongoljekeus ( Sasa & Suzuki, 1997) (Palaearctic)

­ AR 3.1–3.5, width of superior volsella at base equal to at middle, gonostylus pointed at apex ..................................................................... C. ariel ( Sublette, 1960) (Nearctic)

17. Anal point without lateral setae ........ C. daitogeheus Sasa & Suzuki, 2001(Palaearctic)

­ Anal point with lateral setae........................................................................................ 18

18. Gonostylus rounded at apex, superior volsella straight, with apical and lateral setae. LR 1.34–1.44 ................................... C. mongolijeus Sasa & Suzuki, 1997 (Palaearctic)

­ Gonostyluspointedatapex,superiorvolsellacurved,withapical setaeonly.LR1.69–1.84 ............................................................................. C. nodus sp. n. (Oriental, Palaearctic)

19. Tergite IX with distinct caudolateral shoulders........................................................... 20

­ Tergite IX without caudolateral shoulders .................................................................. 21

20. Anal point widest at base, parallel­sided, superior volsella not sclerotized.................... .................................................................................. C. lenzi Zorina, 2001 (Palaearctic)

­ Anal point widest at apex, superior volsella sclerotized ................................................. ........................................................................... C. secundus Zorina, 2003 (Palaearctic)

21. Gonostylus apically pointed .................................. C. holsatus Lenz, 1959 (Palaearctic)

­ Gonostylus apically rounded .............. C. pseudotener (Goetghebuer, 1922) (Holarctic)