Indosialis

Liu, Xingyue, Flint, Oliver S. & Yang, Ding, 2008, Revision of the alderfly genus Indosialis Lestage (Megaloptera: Sialidae), Zootaxa 1677, pp. 47-56 : 48

Key to males of Indosialis

1. Male ninth gonostylus robust ( Figs. 5 , 9 ); male tenth sternum with distal lobes directed straight posteriad ( Figs. 6 , 10 ).................................................................................................................................................. 2

- Male ninth gonostylus slender ( Fig. 13 ); male tenth sternum with distal lobes curved ventrolaterally ( Fig. 14 )........................................................................................................................ Indosialis minora (Banks)

2. Male ninth gonostylus with distal half narrowed ( Fig. 7 ); male tenth tergum subtriangular with blunt tip ( Fig. 7 ) ..................................................................................... Indosialis bannaensis Liu, Yang & Hayashi

- Male ninth gonostylus with distal half inflated ( Fig. 11 ); male tenth tergum with distal half narrowed into a digitiform process ( Fig. 11 ) .............................................................................. Indosialis indicus sp. nov.

Figures

FIGURES 5 – 8. Indosialis bannaensis Liu, Yang & Hayashi, male from Vietnam. 5. Genitalia, dorsal view; 6. Genitalia, ventral view; 7. Genitalia, lateral view; 8. Genitalia, caudal view. S 9: ninth sternum; St 9: ninth gonostylus; S 10: tenth sternum; T 9: ninth tergum; T 10: tenth tergum. Scale bar = 0.5 mm.

FIGURES 9 – 12. Indosialis indicus sp. nov., male. 9. Genitalia, dorsal view; 10. Genitalia, ventral view; 11. Genitalia, lateral view; 12. Genitalia, caudal view. Scale bar = 0.5 mm.

FIGURES 13 – 18. Indosialis minora (Banks). 13. Male genitalia, dorsal view; 14. Male genitalia, ventral view; 15. Male genitalia, lateral view; 16. Male genitalia, caudal view; 17. Female abdominal apex, lateral view; 18. Female abdominal apex, ventral view. G 9: ninth gonocoxite; S 7: seventh sternum; S 8: eighth sternum; S 9: ninth sternum; St 9: ninth gonostylus; T 7: seventh tergum; T 8: eighth tergum; T 9: ninth tergum; T 10: tenth tergum. Scale bar = 0.5 mm.