Capnia teresa Claassen 1924

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 : 175

Capnia teresa Claassen 1924

( Figs. 3, 5, 6, 9 , 38-43 )

Distribution. California.

Material examined. California: San Bernadino Co., Forsee Creek , N 30 ° 09.431 ’ W 116 ° 55.885 ’, Elev. 1812m, 27-II-2008, E F. Drake, 16♂, 17♀, 1 pharate ♂ in exuvium, 3 reared ♂ with exuviae, 5 reared ♀ with exuviae, 6 pharate ♀ in exuviae (1 partially emerged), 2♂ larvae, 10♀ larvae .

Characters. Body length ♂ 6.0- 6.2mm, ♀ 6.8-6.9mm. Light to medium brown dorsally, ventrum lighter, little pattern except underlying muscles or developing adult pigment. Antennal segments 44-50, head capsule width ♂ 0.75mm, ♀ 0.87mm. Lacinia and mandibles as described for C. umpqua and C. ventura ( Figs. 44-48 , 50-53 ). Pronotum with setae scattered over surface and as a sparse marginal fringe. Mesosternal Y-arms typical of genus. Hind wingpads shallowly notched along inner margins; inside forewingpad length ♂ 0.84mm, ♀ 1.02- 1.08mm. Femora bear scattered surface bristles, and tibia with a silky outer fringe ( Fig. 3 ). Abdominal segments with long surface hairs ( Figs. 38-39 ). Sexual dimorphism evident. Male 10 th tergum with short, upturned posterior extension ( Figs. 5, 6 , 40 ); underlying developing epiproct visible in pharate or partially emerged individuals ( Fig. 5 ). Female without upturned extension of 10 th tergum ( Fig. 41 ). Cercal segments ♂ 30, ♀ 34; cercomeres with apical circlet of short and long bristles, longer dorsal and ventral bristle in lateral view, and no intercalary hairs ( Figs. 9 , 42, 43 ).

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. 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. 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. 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.