Demicryptochironomus Lenz, 1941

Yan, Chuncai, Saether, Ole A., Jin, Zhaohui & Wang, Xinhua, 2008, Three new species of the Harnischia complex from the Sino-Indian Region, with a review of Demicryptochironomus Lenz (Diptera: Chironomidae), Zootaxa 1968, pp. 1-22 : 3-5

Key to the males of Demicryptochironomus Lenz

1. Anal tergite bands V- or U-shaped; superior volsella digitiform or bilobed, with or without microtrichia; minute inferior volsella present or absent; gonostylus banana-shaped, without median constriction (subgenus Demicryptochironomus ).........................................................................................................................2

- Anal tergite bands Y-shaped; superior volsella digitiform or racquet-shaped, never bilobed; inferior volsella absent; gonostylus constricted medially (subgenus Irmakia )............................................................17

2. Inferior volsella present................................................................................................................................3

- Inferior volsella absent................................................................................................................................11

3. Gonostylus without conspicuous longitudinal keel; anal point strongly swollen medially. Sino-Indian.. .... ........................................................................................................ D. (D.) minus Yan, Tang et Wang, 2005

- Gonostylus with distinct longitudinal keel; anal point falciform or nearly parallel-sided..........................4

4. Inferior volsella bare. Palaearctic, Sino-Indian .......... D. (D.) inawabeceus ( Sasa, Kitami et Suzuki, 1999)

- Inferior volsella with setae and/or microtrichia............................................................................................5

5. Inferior volsella sheet-shaped, without setae, and covered entirely with microtrichia.................................6

- Inferior volsella tubercle-shaped or lobe-shaped, with setae, covered with microtrichia basally or without microtrichia...................................................................................................................................................7

6. Gonostylus rounded apically; superior volsella thumb-like. Palaearctic, Sino-Indian................................... ........................................................................................... D. (D.) asamaprimus Sasa et Hirabayashi, 1991

- Gonostylus pointed apically; superior volsella with1–3 tubercles. Palaearctic, Sino-Indian ........................ ...................................................................................................................... D. (D.) tamacutus ( Sasa, 1983)

7. Inferior volsella without microtrichia...........................................................................................................8

- Inferior volsella with microtrichia................................................................................................................9

8. Inferior volsella with 1–2 large, even tubercles, bearing 2 apical setae. Palaearctic, Sino-Indian ................ ................................................................................................................... D. (D.) chuzequartus Sasa, 1984

- Inferior volsella widened at base, with small lateral projection, bearing 1 apical and 1 subapical seta. Palaearctic, Sino-Indian ...................................................................... D. (D.) harunasecundus ( Sasa, 1996)

9. Gonostylus nearly straight; inferior volsella lobe-like, with microtrichia in basal 2/3. Palaearctic, Sino- Indian ......................................................................................... D. (D.) ginzancedeus Sasa et Suzuki, 2001

- Gonostylus bent medially or in apical 1/3; inferior volsella tubercle-like, with microtrichia at base.......10

10. Anal point parallel-sided; superior and inferior volsella subequal in length, neither surpassing margin of gonostylus; HR 1.75–1.80. Palaearctic, Sino-Indian ........................................ D. (D.) evgenii Zorina, 2004

- Anal point widened at apical 1/3, superior volsella 1.88–2.00 times longer than inferior volsella, both surpassing margin of gonostylus, HR 1.00. Palaearctic, Sino-Indian ................... D. (D.) lutoga Zorina, 2004

11. Superior volsella with single long seta. Palaearctic, Sino-Indian............... D. (D.) uresicarinus Sasa, 1989

- Superior volsella with at least two long setae.............................................................................................12

12. Base of anal point with shoulders making base subrectangular. Afrotropical................................................ .................................................................................................................. D. (D.) zairensis Lehmann, 1979

- Base of anal point triangular.......................................................................................................................13

13. Gonostylus nearly without longitudinal keel..............................................................................................14

- Gonostylus with strong longitudinal keel...................................................................................................16

14. Superior volsella covered with microtrichia. Sino-Indian..... D. (D.) antennarius Yan, Tang et Wang, 2005

- Superior volsella without microtrichia.......................................................................................................15

15. Anal point with median ridges covered with microtrichia. Sino-Indian......................................................... ............................................................................................................. D. (D.) yui Yan, Tang et Wang, 2005

- Anal point bare, without median ridges. Palaearctic, Sino-Indian ... D. (D.) irioabeus Sasa et Suzuki, 2000

16. Superior volsella patch-like, not reaching margin of gonostylus; gonostylus nearly parallel-sided. Sino- Indian ............................................................................................ D. (D.) pannus Yan, Tang et Wang, 2005

- Superior volsella digitiform, extending to margin of gonostylus; gonostylus curved inwards. Palaearctic, Sino-Indian ........................................................................................ D. (D.) vulneratus (Zetterstedt, 1838)

17. Superior volsella without setae. Sino-Indian ........................... D. (I.) clarilatus ( Guha et Chaudhuri, 1981)

- Superior volsella with setae........................................................................................................................18

18. Tergite IX with shoulder-like posterior margin..........................................................................................19

- Tergite IX with cone-shaped posterior margin...........................................................................................20

19. Superior volsella digitiform, with 2 apical setae; anal point nearly parallel-sided. Afrotropical. ................. .........................................................................................................D. (I) cinereithorax Goetghebuer, 1934

- Superior volsella spatulate, with 3 subapical setae, anal point strongly constricted medially. Sino-Indian .. ........................................................................................................................................ D. (I) retusus sp. n.

20. AR 3.25; base of anal point large, about 2/3 as long as anal point. Holarctic................................................ ................................................................................................................... D. (I.) cuneatus (Townes, 1945)

- AR 1.14–2.64; base of anal point small, less than 1/2 as long as anal point..............................................21

21. Base of anal point not constricted; anal point parallel-sided or conical.....................................................22

- Base of anal point constricted; anal point spatulate...................................................................................25

22. Superior volsella swollen distally, with subapical setae.............................................................................23

- Superior volsella parallel-sided, with apical setae......................................................................................24

23. AR 1.63; gonostylus with strong inner concavity in apical 1/3; superior volsella with 2 setae. Palaearctic, Sino-Indian ................................................................................ D. (I.) concavus Yan, Tang et Wang, 2005

- AR 2.27; gonostylus with weak inner concavity in apical 1/3, superior volsella with 3 setae. Palaearctic, Sino-Indian ...................................................................... D. (I.) oyabeprimus ( Sasa, Kawai et Ueno, 1988)

24. Gonostylus with basal projection and rounded apex. Palaearctic, Sino-Indian.............................................. ....................................................................................................................... D. (I.) neglectus ( Reiss, 1988)

- Gonostylus without basal projection and pointed apex. Holarctic, Sino-Indian................................................. .................................................................................................................. D. (I.) fastigatus (Townes, 1945)

25. Superior volsella narrow, digitiform, pointed, with 1 median lateral seta and 1 subapical seta. Sino-Indian. ......................................................................................................................... D. (I.) banepae ( Reiss, 1988)

- Superior volsella cylindrical or swollen distally, with 2–3 subapical or apical setae.................................26

26. Superior volsella cylindrical with 2 apical setae........................................................................................27

- Superior volsella racket-like, swollen at apex, with 2 subapical setae.......................................................28

27. Ridges on base of anal point with lateral setae; gonostylus strongly curved in apical 1/3; AR 2.32; LR 1 1.93. Sino-Indian ..................................................................... D. (I.) constrictus Yan, Tang et Wang, 2005

- Ridges on base of anal point without lateral setae; gonostylus weakly curved in apical 1/3; AR 1.41–1.62; LR 1 1.60–1.69. Palaearctic................................................................................. D. (I.) schachti Reiss, 1988

28. Anal point strongly swollen medially, ridges with lateral setae; AR 2.03; LR 1 1.86–2.08. Sino-Indian ....... ......................................................................................................... D. (I.) spatulatus Wang et Zheng, 1994

- Anal point slightly swollen medially, ridges without lateral setae; AR 1.43-1.56; LR 1 1.71–1.72. Palaearctic ............................................................................................................................ D. (I.) latior Reiss, 1988