Boreoheptagyia Brundin, 1966

Makarchenko, Eugenyi A., Endo, Kazuo, Wu, Jingyang & Wang, Xinhua, 2008, A review of Boreoheptagyia Brundin, 1966 (Chironomidae: Diamesinae) from East Asia and bordering territories, with the description of five new species, Zootaxa 1817 (1), pp. 1-17 : 2

Key to the males of Boreoheptagyia Brundin from East Asia and bordering territories

1. Antenna with 13 flagellomeres....................................................................................................................2

- Antenna with 5–8 flagellomeres..................................................................................................................8

2. Preepisternum and median anepisternum II with setae ( Fig. 27 ). Legs brown or dark brown, without white spots. With field of small spinules distal of transverse sternapodeme. ( Figs 28, 32 ). .................................. ........................................................................................................... B. sasai Makarchenko et Endo , sp. n.

- Preepisternum and median anepisternum II without setae. Femur and tibia with white spots or rings. Field of small spinules distal of transverse sternapodeme absent.........................................................................3

3. Alula with 3–4 setae ( Fig. 3 ). Gonostylus short and inflated, with very short, narrow apical part ( Figs 1– 2 ). .................................................................................... B. alulasetosa Makarchenko, Wu et Wang , sp. n.

- Alula without setae. Shape of gonostylus different .................................................................................... 4

4. Dorsocentrals in anterior part of scutum only.............................................................................................5

- Dorsocentrals in anterior and posterior parts of scutum. ............................................................................ 6

5. Prealars 12. Aedeagal lobe with some distal teeth ( Fig. 8 ). B. ambigua Makarchenko, Wu et Wang , sp. n.

- Prealars 1–4. Aedeagal lobe without teeth ( Fig. 12 ).. B. xinglongiensis Makarchenko, Wu et Wang , sp. n.

6. AR 0.21–0.22. Dorsocentrals 11.............................................................................. B. rotunda Serra-Tosio

- AR 0.11–0.16. Dorsocentrals 16–23............................................................................................................7

7. Prealars 17–28. .................................................................................................... B. brevitarsis (Tokunaga)

- Prealars 10. ................................................................................................. B. similis (Chaudhuri et Ghosh)

8. Antenna with 5 flagellomeres. Basal lobe of gonocoxite large and rounded ( Fig. 21 ). AR 0.64. ................ .............................................................................................................. B. kurobebrevis (Sasa et Okazawa)

- Antenna with 6 or 8 flagellomeres. Basal lobe of gonocoxite differently shape. AR 0.44–0.50...............9

9. Antenna with 6 flagellomeres. Gonostylus with megaseta........................................................................10

- Antenna with 8 flagellomeres ( Fig. 22 ). Gonostylus without megaseta ( Fig. 25 )......................................... .................................................................................................. B. nepalensis Makarchenko et Endo , sp. n.

10. Tergite IX with small distinct anal point. Basal lobe of gonocoxite small and covered with setae. Gonostylus attached to gonocoxite two-third from apex, with 2 megasetae ( Fig. 39 ). ........ B. unica Makarchenko

- Tergite IX without anal point. Basal lobe of gonocoxite nose-like. Gonostylus attached near apex of gonocoxite, with 1 megaseta ( Figs 35–36 ). .................................................... B. tibetica Makarchenko et Wang

Figures

FIGURE 21. Hypopygium of Boreoheptagyia kurobebrevis (Sasa et Okazawa, 1992) (holotype), dorsal view.

FIGURES 26–33. Boreoheptagyia sasai Makarchenko et Endo, sp. n., male from Magadan region (26–30) and Hokkaido (31–33). 26. Scutum, dorsal view. 27. Scutum, lateral view. 28, 30, 32. Hypopygium with tergite IX removed, dorsal view. 29, 31. Tergite IX. 33. Transverse sternapodeme. Scale bars: 50 µm.

FIGURES 1–6. Boreoheptagyia alulasetosa Makarchenko, Wu et Wang, sp. n., male. 1–2. Hypopygium, dorsal view. 3. Wing. 4. Antenna. 5. Squama and alula. 6. Antennal flagellomeres 11–13. Scale bars: Figs 1–2, 6 = 50 µm, Fig. 3 = 500 µm, Figs 4–5 = 200 µm.

FIGURES 7–13. Boreoheptagyia ambigua Makarchenko, Wu et Wang, sp. n. (7–10) and B. xinglongiensis Makarchenko, Wu et Wang, sp. n. (11–13), males. 7, 12. Hypopygium, dorsal view. 8. Distal part of aedeagal lobe. 9, 13. Legs. 10. Antennal flagellomeres 12–13. 11. Gonostylus. Scale bars: Figs 7, 10–13 = 50 µm, Fig. 8 = 20 µm.

FIGURES 22–25. Boreoheptagyia nepalensis Makarchenko et Endo, sp. n., male. 22. Antenna. 23. Scutum, dorsal view. 24. Wing. 25. Hypopygium, dorsal view. Scale bars: Figs 22, 25 = 50 µm, Fig. 23 = 200 µm, Fig. 24 = 500 µm

FIGURES 34–39. Boreoheptagyia tibetica Makarchenko, Wang et Willassen, 1996 (34-36) and B. unica Makarchenko, 1994 (37-39), males. 34, 37. Antenna. 35, 39. Hypopygium, dorsal view. 36. Gonostylus. 38. Scutum, dorsal view.