Capnia coyote Nelson & Baumann 1987

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 : 170

Capnia coyote Nelson & Baumann 1987

( Figs. 1, 2, 4, 8 , 26-31 )

Distribution. California.

Material examined. California: San Bernadino Co., Lake Silverwood, Miller Campground , N 34 ° 16.241 ’ W 17 ° 17.490 ’, 7-III-2007, E.F. Drake, 4♂, 3♀, 1 reared ♂ with exuvium, 15♀ larvae, 1♂ exuvium, 1 confirmed ♀ (by clearing pharate larva), 1 pharate ♀ larva; water temperatrure on collection date 11.11 ° C, air temperature 20 ° C, elevation 1109m, overstory of stream was Jeffrey Pine, Alder, Big Cone Spruce. Willows along stream had been cut for fire prevention. Same locality, 1-II-2011, E.F. Drake, 62♂, 31♀, 1 pair in-copulo .

Characters. Body length ♂ 6.8-7.0mm, ♀ 7.5-9mm. Light to medium brown dorsally, ventrum lighter, little pattern except underlying muscles or developing adult pigment. Antennal segments 44-46, head capsule width ♂ 0.75-0.81mm, ♀ 0.90-1.02mm. Lacinia triangular, palmate, with longitudinally striate palm surface, broad apical teeth, ventral comb of 10-14 bristles and dorsal comb of 16-18 longer bristles (similar to C. ventura , Figs. 50, 51 ). Right mandible with apical teeth, molar pad of dense stiff bristles, and inner band of hairs from base of apical teeth to molar pad (similar to C. umpqua , Figs. 47, 48 ). Pronotum with scattered setae over surface, and as a marginal fringe ( Fig. 1 ). Mesosternal Y-arms with enclosed subtriangular area about 0.3 times the intercostal width. Hind wingpads shallowly notched along inner margin (like C. inyo and C. umpqua , Figs. 15 , 20 ); inside forewingpad length ♂ 0.96mm, ♀ 1.26mm. Femora with scattered surface bristles, and tibia with a silky outer fringe ( Fig. 2 ). Abdominal segments with long surface hairs ( Figs. 26-29 ). Sexual dimorphism evident. Male with posterior extension of 10 th tergum, triangular in dorsal view with length 0.52-0.57mm; underlying developing wide-based epiproct visible in pharate individuals ( Fig. 4 ); 10 th tergum in lateral view subtriangular, nearly straight with slightly upturned tip dorsally ( Fig. 8 ). Female without posterior extension of 10 th tergum ( Figs. 7 , 28 ). Cercal segments 30-32; cercomeres with apical circlet of short and long bristles, longer dorsal and ventral bristle in lateral view, and occasional fine intercalary hair ( Figs. 30-31 ), not usually visible under 50X light microscopy, and not present in any of the other 4 species studied.

Figures

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. 26-31. Capnia coyote larval characters. 26, 27. Abdominal segments 8, 9, lateral. 28. Female abdominal segments 9, 10, lateral. 29. Female abdominal segments 8, 9, lateral. 30. Cercomeres 4, 5, lateral. 31. Cercomeres 9, 10, 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.

Figs. 44-49. Capnia umpqua larval characters. 44. Lacinia, ventral. 45. Right mandible. 46. Right mandible molar pad, detail. 47. Left mandible, ventral. 48. Left mandible molar cup, detail. 49. Male terminalia, lateral.

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. 20-25. Capnia umpqua larval characters. 20.Female habitus. 21. Right front leg, dorsal. 22. Mesosternum. 23. Pharate male terminalia, dorsal. 24. Cercus, basal segments. 25. Cercus, apical segments. Scale line= 2mm.