Cryptoperla spec.

Stark, Bill P. & Sivec, Ignac, 2007, New Species And Records Of Asian Peltoperlidae (Insecta: Plecoptera), Illiesia 3 (12), pp. 104-126 : 115-116

Cryptoperla spec. Ch A

( Figs. 31-32 , 36-38 )

Material examined. China: Sichuan, Jiulong Valley , 200 km W Chengdu, 900-1200 m, 21-22 May 1991, I. Sivec, 1 ♀ ( PMSL) .

Adult habitus. General color brown to dark brown. Head mostly dark brown but with pale areas forward of M-line and on occiput ( Fig. 31 ); pronotum dark brown with pale brown rugosities; antennae and legs brown. Wings brown, veins darker.

Male. unknown

Female. Forewing length 12.5 mm. Subgenital plate large, almost quadrate but with rounded posterolateral angles, and covering most of sternum 9; plate margined with a narrow, transparent, hairless band ( Fig. 32 ). Sternum 9 produced over base of sternum 10; sternum 9 mostly transparent and hairless over most of mesal field.; lateral bars present; microtrichia band present in vaginal base.

Egg. Diameter ca. 0.207 mm, height ca. 0.144 mm, width ca. 0.213 mm. Shape somewhat nautiloid with a prominent spiral ridge forming a series of tiers which are cross-connected by vertical bars forming rows of more or less rectangular cells ( Fig. 36 ). Chorionic surface within cells smooth. Micropyles clustered on apex of spire ( Fig. 37 ); opposite pole concave, depression filled with hexagonal FCIs ( Fig. 38 ).

Larva. Unknown.

Diagnosis. The subgenital plate shape for this species is similar to that of C. sinensis but this specimen is significantly smaller than that species as discussed above for C. meyi . The extraordinary egg shape should help in associating future material and perhaps in establishing the correct generic placement.

Figures

Figs. 29-32. Cryptoperla structures. 29-30. C. meyi. 29. Head and pronotum, 30. Female terminalia. 31-32 C. sp. Ch A. 31. Head and pronotum, 32. Female terminalia.

Figs. 33-38. Cryptoperla micrographs of eggs. 33-35. C. meyi. 36-38. C. sp. Ch A.