Cryptoperla fraterna (Banks)

Stark, Bill P. & Sivec, Ignac, 2007, New Species And Records Of Asian Peltoperlidae (Insecta: Plecoptera), Illiesia 3 (12), pp. 104-126 : 107-109

Cryptoperla fraterna (Banks)

( Figs. 8-10 , 13-14 )

Nogiperla fraterna Banks, 1938:223 .

Lectotype ♂, Pahang, Malaysia (Museum of Comparative Zoology), designation Stark, 1989:514

Neopeltoperla fraterna: Hitchcock, 1962:83 Cryptoperla fraterna: Uchida & Isobe, 1988:20 Cryptoperla fraterna: Stark, 1989:514 Material examined. Malaysia: Hulu Perak, Belum Expedition Base Camp, 1-3 April 1994, I. Sivec, 2 ♂, 1 ♀, 5 larvae, 1 exuvium (PMSL). Same site, 8-10 April 1994, I. Sivec, 2 ♀, 9 larvae (PMSL).

Remarks. Stark (1989) figured variations in the male basal cercal segment for various populations of this species but the female, egg and larva have not previously been described.

Female. Forewing length 10 mm. Subgenital plate parabolic, covering ca. half of sternum 9; margin of plate with a narrow, transparent, hairless zone

13

14

( Fig.13 ). Sternum 9 produced mesally, overlapping base of sternum 10; base of sternum 9 with microtrichial band extending under subgenital plate; lateral bars present.

Egg. Bulb shaped with low, wide collar surrounded by smooth rim. Chorion punctate with each pit surrounded by hexagonal FCIs ( Figs. 8-10 ); FCIs larger at anterior pole opposite collar; ca. 16 longitudinal and ca. 16 horizontal rows of pits visible in lateral aspect. Micropyles subequatorial nearest anterior pole.

Larva. Pre-emergent body length 6-7.5 mm. Dorsal body color rather uniformly reddish brown, sometimes paler on basal abdominal terga. Prothorax and thoracic sterna without gills, mesothorax and metathorax each with a supracoxal gill projecting under the wingpad; paraprocts each with a slender, delicate dorsal gill filament, median gill reduced and obscure on membranous ventral margin of tergum 10. Lacinia tridentate, mesal tooth slightly larger that laterals; galea brush expanded, much wider than apex of lacinia. Thoracic sterna without posterior or subapical setal fringes; fringes confined to anterior margin of prosternum and lateral margins of mesosternum and metasternum around coxae; posterior margin of metasternum concave ( Fig. 14 ). Abdominal sterna 1-4 without posterior setal fringe; fringe on sternum 5 interrupted mesally but complete on sterna 6-9. Cerci short and without ventral blade-like setae in apical whorls.

Figures

Figs. 7-12. Cryptoperla micrographs of eggs. 7. C. curvata entire egg, 8-10. C. fraterna, 11-12. C. ishigakiensis.

Figs. 13-20. Cryptoperla structures. 13-14. C. fraterna. 13. Female terminalia, 14. Larval thoracic sterna, 15-20. C. hubleyi. 15. Male terminalia, dorsal, 16. Male basal cercal segments, lateral, 17. Male sternum 9, 18. Larval thoracic sterna, 19. Larval abdominal terga, 20. Larval cercal segments 5-12, lateral.