Neoperla sp.

Stark, Bill P. & Sivec, Ignac, 2015, New Species And Records Of Neoperla (Plecoptera: Perlidae) From India, Illiesia 11 (7), pp. 75-91 : 88-90

Neoperla sp. Id-D

( Figs. 31-32 , 37-42 )

Material examined. INDIA: Karnataka, Agumbe Ghats , 13° 29.386’N, 75° 04.537’E, 9 October 2004, G. Svenson, 1♀ ( BYUC) .

Adult habitus. General color yellow-brown. Head yellow-brown with dark spot connecting ocelli and an obscure dusky brown area over tentorial calluses ( Fig. 31 ); anteromedian area of frons and lappets darker brown; antennal bases pale brown. Pronotum pale brown with darker rugosities. Legs pale, slightly darker on upper tibiae. Wings transparent, veins pale brown except C and Sc pale.

Male. Unknown.

Female. Forewing length 11.5 mm. Subgenital plate undeveloped. Vagina membranous, but with a pair of thick parenthesis-shaped areas surrounding base of seminal receptacle duct ( Fig. 32 ). Receptacular duct long and coiled twice around dorsal vaginal surface and base of membranous, sausage-shaped, coiled seminal receptacle. Receptacular duct lined full length with brown scales but in apical third scales restricted to median section of tube, not reaching lateral margins; in basal half, scales occur along outer margin, not extending to inner margin. Egg. Outline jar-shaped with broad, short lid and narrow, sessile collar ( Fig. 37 ). Length ca. 298 μm, equatorial width ca. 188 μm. Collar defined by a smooth ring ca. 18 μm wide; collar diameter ca. 69- 77 μm ( Figs. 38-39 ). Egg surface consists of ca. 25, gently sinuate, smooth, wide striae; striae width near equatorial zone, ca. 15-16 μm; sulci very narrow. Lid short and bearing obscure follicle cell impressions with smooth, apparently impunctate floors ( Fig. 40 ). Eclosion line absent; micropyles located subequatorially near lid but slightly beyond a zone with irregularly notched striae ( Fig. 40 ); micropylar orifices slanted and set on elongate ridges ( Figs. 41-42 ).

Larva. Unknown.

Comments. The egg of this species is similar to, and perhaps indistinguishable from that of N. biseriata , and the specimen was collected with a series of males determined as that species (see above). Because the receptacular duct of this female appears longer than in N. biseriata ( Zwick et al. 2007) , we are treating it as a possible separate species.

Figures

Figs. 28-32. Neoperla adult structures. 28-30. Neoperla sp. Id-C. 28. Head and pronotum. 29. Vagina and receptacle. 30. Subgenital plate. 31-32. Neoperla sp. Id-D. 31. Head and pronotum. 32. Vagina and receptacle.

Figs. 37-42. Neoperla sp. Id-D eggs. 37. Entire egg, lateral. 38. Collar end. 39. Lid and micropylar zone. 40. Collar, apical aspect. 41. Micropylar zone. 42. Micropylar detail.