Pointed angle binding tensioner

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Pointed angle binding tensioner
Dysstroma citrata.01.jpg

Acute-angle binding tensioner ( Dysstroma citrata )

Systematics
Class : Insects (Insecta)
Order : Butterflies (Lepidoptera)
Family : Spanner (Geometridae)
Subfamily : Larentiinae
Genre : Dysstroma
Type : Pointed angle binding tensioner
Scientific name
Dysstroma citrata
( Linnaeus , 1761)
Dysstroma citrata

The pointed-angle leaf -tensioner ( Dysstroma citrata , syn .: Chloroclysta citrata ), also known as the shrub-heap leaf tensioner , is a butterfly ( moth ) from the family of the tensioners (Geometridae).

features

butterfly

The wingspan of the moth ranges from 23 to 31 millimeters. In the animals, which are extremely variable in color, the middle field of the forewings can show whitish, gray, black or brown tints. Heavily darkened forms are predominant in some areas. Characteristic is the pointed and protruding post-medial line on the forewings, which usually reaches or interrupts the wavy line. For a comparison of the distinguishing features to the very similar lunar spot ligament tensioner ( Dysstroma truncata ) see there. The species complex truncata - citrata as well as their color variability was already reported in detail and sometimes controversially in the 20th century .

Caterpillar, pupa

Adult caterpillars are light green in color, have an approximately cylindrical shape and a blunt anus.

The doll is green in color, shows whitish wing sheaths and has a brown, bluntly rounded cremaster .

Synonyms

In addition to Chloroclysta citrata , other synonyms also include the following:

  • Larentia immanata
  • Cidaria citrata

Geographical distribution and occurrence

The species is distributed from Europe through the temperate zone of Asia via northwest China, Mongolia to East Asia. It is absent in Portugal, on the Mediterranean islands and in Greece. In the north it occurs in Scandinavia as far as Lapland as well as on Iceland and the Faroe Islands . Occurrences have also been reported in North America and India. In the Alps it rises to an altitude of around 2400 meters. The Spitzwinkel Bindenspanner prefers to live in mountainous areas, mountain forests, bushy slopes and bog areas.

Way of life

The nocturnal moths fly in one generation from July to October. They visit artificial light sources as well as bait . The caterpillars are found from May to July. The leaves of the bilberry ( Vaccinium myrtillus ), but also willow ( Salix ), birch ( Betula ) and other mostly low plants are part of their diet . The species overwinters as an egg.

Danger

The pointed angle binding spanner occurs in all German federal states and is listed as not endangered on the Red List of Endangered Species .

swell

Individual evidence

  1. ↑ Fritz Heydemann: On the D. truncata Hfn.-citrata question. , Journal of the Austrian Entomological Association, Vienna, 1930
  2. ^ Leopold Müller: About Larentia truncata Hufn.u. immanata Haw. , Journal of the Austrian Entomological Association, Vienna, 1929/30
  3. ↑ E. and H. Urbahn: The butterflies of Pomerania with a comparative overview of the Baltic Sea area , Entomological Association of Stettin, Stettin 1939
  4. ↑ Arno Bergmann: The large butterflies of Central Germany. Volume 5/1: Spanner. Distribution, forms and communities. Urania-Verlag, Jena 1955, DNB 450378403 .
  5. ↑ Walter Forster, Theodor A. Wohlfahrt: The butterflies of Central Europe. Volume 5: Spanner. (Geometridae). Franckh'sche Verlagshandlung, Stuttgart 1981, ISBN 3-440-04951-5 .
  6. ↑ a b Günter Ebert (Ed.): The butterflies of Baden-Württemberg . 1st edition. tape 8 . Moth VI. Spanner (Geometridae) 1st part. Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3497-7 .
  7. ^ Josef Wolfsberger: The Macrolepidoptera fauna of Monte Baldo in Northern Italy. Museo Civico di Storia Naturale di Verona Memorie Fuori. Ser. 4, 1971
  8. ↑ Federal Agency for Nature Conservation (Ed.): Red List of Endangered Animals in Germany . Landwirtschaftsverlag, Münster 1998, ISBN 3-89624-110-9 .

literature

  • Günter Ebert (Ed.): The butterflies of Baden-Württemberg . 1st edition. tape 8 . Moth VI. Spanner (Geometridae) 1st part. Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3497-7 .
  • Walter Forster , Theodor A. Wohlfahrt : The butterflies of Central Europe. Volume 5: Spanner. (Geometridae). Franckh'sche Verlagshandlung, Stuttgart 1981, ISBN 3-440-04951-5 .

Web links

Commons : Acute Angle Binderspanner  - Collection of images, videos and audio files