Sorhagenia janiszewskae
Sorhagenia janiszewskae is a butterfly (moth ) from the family of Chrysopeleiidae.
Features
The moths reach a wingspan of 10-13 millimeters. Sorhagenia janiszewskae similar Sorhagenia rhamniella, the front wings are but darker and elongate ( six times as long as wide). The light area in the wing center is indistinct margins. A reliable differentiation is possible only through a genital examination.
In the male the uncus is spatulate. The Valven including the ampulla are slender and taper to a point. They are about a quarter longer than the cucullus. The saccule is short and broad at the base. It tapers distally. The Costa has two extensions, a small round base in nearby and a large square, which connects to the smaller ones. The juxtaposition is triangular. The Vinculum is wide and V-shaped. The aedeagus is strong and has a large bulbous caecum penis.
In females, the ostium is provided with two tapered and strongly sclerotized lateral plates. The lateral extensions of the genital plate are triangular. The antrum widens at the confluence of the ductus bursae. The ductus bursae slightly longer than the antrum. The corpus bursae is oval. The signals have a small spike in the middle.
The caterpillars are whitish, the head and neck shield are brownish. A gray, translucent stain located on mesonotum and Epinotum.
Dissemination
Sorhagenia janiszewskae is widespread in Europe in the north to the south Fennoskandinaviens. The species occurs also in the Caucasus and western Transcaucasia.
Biology
The caterpillars develop on alder ( alnus frangula ) and, occasionally, the Purgier buckthorn ( Rhamnus cathartica ), Alpen- buckthorn ( Rhamnus alpina) and Rhamnus fallax. The caterpillars live from May to June in the food aisles of young branches, where they eat the marrow. This wilt the leaves at the top of the branch, so that the herbivory is displayed. The Raupenkot is partially ejected through a side opening of the feeding passage. This opening is often located at the leaf axil and is hard to find. Young caterpillars nate in the petioles. The caterpillars pupate in a loose cocoon on the ground. It makes one generation per year. The moths fly from late June to late August. But you were already late September and found in March. It is believed that in contrast to Sorhagenia rhamniella and Sorhagenia lophyrella at Sorhagenia janiszewskae occasionally overwinter moths.