Neoperla sp.

Stark, Bill P. & Sivec, Ignac, 2015, New Species And Records Of Neoperla (Plecoptera: Perlidae) From India, Illiesia 11 (7), pp. 75-91 : 85-87

Neoperla sp. Id-B

( Figs. 17-19 , 24-27 )

Material examined. INDIA: Karnataka, Jog Falls , 5 km E town, 16° 13.692’N, 74° 53.542’E, 7 October 2004, Svenson, Cameron, Miller, 1♀ ( BYUC) .

Adult habitus. General color yellow-brown with slightly darker markings. Head yellow with dark spot over ocelli extending laterally along ecdysial suture as a thin dusky line; three obscure, pale brown spots occur on the frontoclypeus, and the lappets are pale brown (17). Antennal bases are pale brown and the flagellum slightly darker brown. Pronotal sutures brown, disc pale brown with slightly darker rugosities. Wing membrane transparent, veins brown except pale costa and subcosta. Femora pale, tibiae pale brown except

30 32

slightly darker at knee.

Male. Unknown.

Female. Forewing length ca. 10.5 mm. Subgenital plate ( Fig. 19 ) slightly produced as a small rounded tab-like, almost bare structure scarcely projecting beyond posterior margin of sternum 8. Vagina ( Fig. 18 ) membranous and constricted near midlength; receptacular duct C-shaped and lined almost full length with brown scales. Several short lines of darker scale clusters occur near midlength of duct; inner margin of scaled area irregular ( Fig. 18 ). Seminal receptacle membranous and attached to duct by a slender stalk; receptacle tightly coiled within inner margins of C-shaped receptacular duct.

Egg. Outline barrel-shaped with moderately wide collar and small lid ( Figs. 24-25 ). Length ca. 327 μm, equatorial width ca. 187 μm. Collar short, ca. 12 μm high and ca. 63 μm wide; rim narrow, slightly flanged with relatively smooth margin, sides of collar surrounded by a single irregular row of 3-5 sided cells ( Fig. 25 ). Anchor a globular mass set on a moderately long pedicel; anchor surface bears scattered globular bodies. Body of egg with ca. 9 narrow, impunctate striae which separate wide, densely punctate sulci; sulci width ca. 25 μm, and bearing ca. 9-12 punctations on each row which transects the sulcus ( Fig. 25 ). Micropyles set on low mound-like sperm guides in subequatorial position at a point near the lid which corresponds to a slight constriction in egg diameter ( Figs. 24, 27 ). Lid bears conspicuous, densely punctate follicle cell impressions over the entire surface ( Fig.

26); eclosion line absent.

Larva. Unknown.

Comments. The egg of this species is not one of those described by Zwick (1981), and therefore this specimen might represent one of the south Indian species for which no female has been discovered, or the female of an undescribed species. The wide, densely punctate sulci are similar to those of Neoperla ochracea , although in that species the chorionic punctations are not as prominent, the follicle cell impressions on the lid are scarcely discernable and the collar of the egg is longer and narrower.

Figures

Figs. 15-19. Neoperla adult structures. 15-16. Neoperla sp. Id-A. 15. Head and pronotum. 16. Vagina and receptacle. 17-19. Neoperla sp. Id-B. 17. Head and pronotum. 18. Vagina and receptacle. 19. Subgenital plate.

Figs. 24-27. Neoperla sp. Id-B eggs. 24. Entire egg, lateral. 25. Collar end. 26. Lid, chorionic detail. 27. Lid and micropylar zone.