Dysstroma citrata
Acute angle - binding tensioner ( Dysstroma citrata )
The acute angle - binding tensioner ( Dysstroma citrata ), also called Busch Halden - blade tensioner, is a butterfly (moth ) from the family of the tensioner ( Geometridae ). The species is also known under the synonym Chloroclysta citrata.
- 6.1 Notes and references
- 6.2 Literature
Features
Butterfly
The wingspan of the moth ranges from 23 to 31 millimeters. In the color extremely variable animals midfield, the forewing whitish, show gray, black or brown tints. Strong shapes are obscured area as predominant. A characteristic feature is the sharp and protruding far post medial line on the fore wings, which usually reaches the wavy line or interrupts. A comparison of the distinguishing features very similar to Möndchenflecken - binding tensioner ( Dysstroma truncata ) see there. About the species complex truncata - citrata and their color variability has been reported in detail and partially controversial already in the 20th century.
Caterpillar, and chrysalis
Adults caterpillars are light green, have an approximately cylindrical shape and a blunt after flap.
The pupa is green, showing whitish wing sheaths and has a brown, bluntly rounded cremaster.
Synonyms
Besides Chloroclysta citrata among other synonyms of the following:
- Larentia immanata
- Cidaria citrata
Geographical distribution and occurrence
The species is widespread in Europe by the temperate zone of Asia over Northwest China, Mongolia to East Asia. You lack in Portugal, on the Mediterranean islands as well as in Greece. In the north, it comes in Scandinavia currently to Lapland as well as Iceland and the Faroe Islands. In addition, deposits have been reported in North America and India. In the Alps, it rises to a height of about 2400 meters. The acute angle - binding tensioner preferred inhabited mountainous areas, mountain forests, bushy hillsides and moorlands.
Way of life
The nocturnal moths fly from July to October in a generation. Visit artificial light sources as well as bait. The caterpillars are held from May to July. To their food include, in particular, the leaves of bilberry (Vaccinium myrtillus ), but also of willow ( Salix), birch (Betula ) and other mostly low plants. The species overwinters as an egg.
Endangering
The acute angle - binding clamper is in all German federal states and is run on the Red List of Threatened Species as not at risk.