Angarotipula

Liu, Qifei & Yang, Ding, 2010, Two new species of the genus Angarotipula Savchenko, with a key to world species (Diptera, Tipulidae), Zootaxa 2653, pp. 60-68 : 61

Key to word species of genus Angarotipula

1. Wing with cell m1 sessile, as in genus Nephrotoma ( Alexander 1919, p 25, Pl. I, fig. 8) ............................................. ..................................................................................................................................... A. parrioides ( Alexander, 1919)

- Wing with cell m1 long petiolate.................................................................................................................................. 2

2. Antenna with first flagellomere as long as second flagellomere ( Alexander 1967, p 167, fig. 10) .............................. ............................................................................................................................................... A. illustris ( Doane, 1901)

- Antenna with first flagellomere much longer than second flagellomere...................................................................... 3

3. Tergites of abdomen with black or brown central stripe ..............................................................................................4

- Tergites of abdomen uniform in color ........................................................................................................................ 12

4. First flagellomere three times as long as scape; tergite 9 with lateral angles broadly rounded, posterior margin nearly straight ( Savchenko, 1961, p 359, fig. 213) ................................................................... A. rubzovi ( Savchenko, 1961)

- First flagellomere subequal to scape in length; tergite 9 not as above ......................................................................... 5

5. Flagellum uniform in color, brownish ochreous; R3 curved, as in genus Holorusia ( Edwards, 1926, p 51) ............... .............................................................................................................................................. A. indica ( Edwards, 1926)

- Flagellomeres 1–3 different from other flagellomeres in color; R3 not curved ........................................................... 6

6. Posterior margin of tergite 9 thickened, laterally expanded but not produced into process; clasper of gonostylus ventrally produced posteriorly, tip hook-like ( Savchenko, 1961, p 355, fig. 211) ...... A. tumidicornis ( Lundstrom, 1907)

- Characters not as above ................................................................................................................................................ 7

7. Posterolateral margin of tergite 9 with a spine-like process ......................................................................................... 8

- Posterolateral margin of tergite 9 without spine-like process..................................................................................... 10

8. Spine-like process on posterolateral margin of tergite 9 long; clasper of gonostylus ventrally produced into small spine-like process ( Alexander, 1935, p 131, Pl. III, fig. 42; Savchenko, 1961, p 356, fig. 212) ................................... ..................................................................................................................................... A. laetipennis ( Alexander,1935)

- Spine-like process on posterior margin of tergite 9 short ............................................................................................. 9

9. Tergite 9 with a small obtuse process and a small spine-like process on posterolateral margin; lobe of gonostylus narrow, but distinctly narrowed at midlength ( Fig. 15 ) ............................................................... A. biprocessa sp. nov.

- Tergite 9 with only a small spine-like process on posterolateral margin; lobe of gonostylus broad, not narrowed at midlength ( Alexander, 1966, p 266, Pl. V, fig. 45) ..................................................... A. xuthoptera ( Alexander, 1966)

10. Lobe of gonostylus long and narrow, the length about four and one-half times the diameter, parallel-sided, outer end narrowed and slightly curved, without protuberance on posterior margin ( Alexander, 1966, p 263, Pl. V, fig. 43) ..... .............................................................................................................................. A. snodgrassiana ( Alexander, 1966)

- Lobe of gonostylus broad, outer end narrowed and curved, with protuberance on posterior margin ....................... 11

11. Lobe of gonostylus with curved apex, posterior margin before apex with a tumid, setiferous lobe; clasper of gonostylus with beak slender and elongate, tip slightly expanded ( Fig. 7 ) ............................................... A. aspina sp. nov.

- Lobe of gonostylus with apex not curved, posterior margin just before apex slightly protuberant; clasper of gonostylus with beak stout, tip slightly expanded, broadly obtuse ( Alexander, 1966, p 264, Pl. V, fig. 44) ............................. ....................................................................................................................................... A. frommeri ( Alexander, 1966)

12. Flagellomeres 1–3 yellow, first flagellomere three times as long as scape; tergite 9 with posterior margin gently emarginate, apex armed with two widely spaced, blackened conic processes; clasper of gonostylus with base of beak broad, ventrally with a long spine-like process, tip acuminate ( Yang & Yang, 1995, p 335, fig. 4) ............................. ......................................................................................................................... A. heilongjiangana Yang & Yang, 1995

- Flagellum uniform in color; first flagellomere subequal to scape in length............................................................... 13

13. Abdomen uniformly black; posterior margin of tergite 9 emarginate; lobe of gonostylus long rod-like; clasper of gonostylus medially depressed, beak long and stout ( Yang & Yang, 1996, p 175, fig. 36) ........................................... ............................................................................................................................... A. qinghaiensis Yang & Yang, 1996

- Characters not as above ............................................................................................................................................. 14

14. Femora dark brown except tips darker and bases slightly brightened; tergites of abdomen dark gray, lateral tergal borders narrowly paler gray; midposterior margin of tergite 9 slightly produced, more or less bilobed; lobe of gonostylus stout rod-like; clasper of gonostylus medially depressed, beak long and stout ( Alexander, 1964, p 107, Pl. IV, fig. 41)....................................................................................................................... A. tokunagana ( Alexander, 1964)

- Femora yellow except tips broadly blackened; tergites of abdomen dark brown, lateral tergal borders narrowly more yellowish ( Alexander, 1935, p 133; male unknown) .................................................... A. altivolans ( Alexander, 1935)

Figures

FIGURES 15 – 18. Angarotipula biprocessa sp. nov. Male. 15. Hypopygium, lateral view; 16. ninth tergite, dorsal view; 17. lobe of gonostylus, lateral view; 18. clasper of gonostylus, lateral view. Scale bar of 15 – 16 = 0.38 mm, 17 – 18 = 0.2 mm.

FIGURES 7 – 13. Angarotipula aspina sp. nov. Male. 7. Hypopygium, lateral view; 8. ninth tergite, dorsal view; 9. lobe of gonostylus, lateral view; 10. clasper of gonostylus, lateral view; 11. clasper of gonostylus, posterior view. Female. 12. Ovipositor, lateral view; 13. hypogynial valve, ventral view. Scale bar of 7 – 8 and 12 – 13 = 0.38 mm, 9 – 11 = 0.2 mm. FIGURE 14. Angarotipula laetipennis (Alexander, 1935) Male. Clasper of gonostylus, posterior view. Scale bar = 0.2 mm.