Capnia

Stewart, Kenneth W., Drake, Eugene F. & Stark, Bill P., 2011, Larvae Of Five Species Of The Winter Stonefly Genus Capnia (Plecoptera: Capniidae) From California, U. S. A., Illiesia 7 (18), pp. 167-181 : 178

Provisional Key to Mature Male Larvae of Five California Capnia Species

1 Tergum 10 with 0.7-0.8 mm tubular posterior extension; developing tubular epiproct visible in pharate individuals ( Figs. 15, 17 , 34 ) ………… inyo

1’ Tergum 10 shorter than 0.5 mm, its posterior extension variably shaped ( Figs. 4, 5, 6, 8, 10, 11, 12 , 40 , 55 ) ………………………………………….. 2

2 Posterior extension of 10 th tergum subtriangular in dorsal view, with wide-based developing epiproct visible in pharate individuals ( Fig. 4 ); dorsal margin nearly straight in lateral view, with slightly upturned tip ( Fig. 8 ) ……………… coyote

2’ Posterior extension of 10 th tergum with dorsal margin sharply upturned in lateral view ( Figs. 5, 6 , 40 ), or evenly downturned ( Figs. 54-55 ), or nearly straight with slightly downturned tip ( Fig. 10 ); developing epiproct in pharate individuals variously shaped ( Figs. 5, 10, 12 ) ……………… 3

3 Base of tergum 10 extension with cross-striated surface, and in lateral view, with evenly downturned dorsal margin ( Figs. 54-55 ) ... ventura

3’ Base of tergum 10 with smooth, unstriated surface ……………………………………………………… 4

4 Tergum 10 extension sharply upturned in lateral view ( Figs. 5, 6 , 40 ) ………………………….. teresa

4’ Tergum 10 extension with dorsal margin nearly straight, but with slightly downturned tip in lateral view ……………………………….. umpqua

Figures

Figs. 15-19. Capnia inyo larval characters. 15. Male habitus. 16. Mesosternum. 17. Pharate male terminalia, lateral. 18. Female terminalia, dorsal. 19. Cercus, lateral. Scale line= 2mm.

Figs. 32-37. Capnia inyo larval characters. 32. Abdominal tergum 8. 33. Abdominal sternum 8. 34. Male terminalia, lateral. 35-37. Cercomeres 5-6, 15, 20, lateral.

Figs. 1-14. Capnia larval characters. C. coyote: 1. Head, pronotum, dorsal. 2. Left front leg, dorsal. 4. Pharate male terminalia, dorsal. 7. Female terminalia, dorsal. 8. Male terminalia, lateral. C. teresa: 3. Right front leg, dorsal. 5. Partially emerged male in exuvium, lateral. 6. Male terminalia, lateral. 9. Cercus, lateral. C. umpqua: 10. Male terminalia, lateral. 11. Male terminalia, ventral. C. ventura: 12. Pharate male terminalia, dorsal. 13. Female terminalia, dorsal. 14. Cercus, lateral.

Figs. 38-43. Capnia teresa larval characters. 38. Abdominal tergum 8. 39. Abdominal sternum 8. 40. Male terminalia, lateral. 41. Female terminalia, lateral. 42. Cercomeres 3-7, lateral. 43. Cercomeres 19, 20, lateral.

Figs. 50-55. Capnia ventura larval characters. 50. Lacinia, ventral. 51. Lacinial palm, detail. 52. Right mandible. 53. Left mandible. 54. Male terminalia, lateral. 55. Male terminalia, detail.