Mountain Elm Spanner

from Wikipedia, the free encyclopedia
Mountain Elm Spanner
Venusia blomeri.jpg

Mountain Elm Spanner ( Venusia blomeri )

Systematics
Order : Butterflies (Lepidoptera)
Family : Spanner (Geometridae)
Subfamily : Larentiinae
Tribe : Asthenini
Genre : Venusia
Type : Mountain Elm Spanner
Scientific name
Venusia blomeri
( Curtis , 1832)

The Elm Spanner ( Venusia blomeri , Syn .: Discoloxia blomeri ) or Elm Leaf Spanner is a butterfly ( moth ) from the Spanner family (Geometridae). The species was named by John Curtis after the British amateur entomologist Charles Blomer .

features

butterfly

The wingspan of the moth is 20 to 26 millimeters. The forewings are gray-white in color with some blurred dark transverse lines. The root field is unevenly dusted in light brown. In front of the wingtip there is a large maroon-brown spot, which is darkly bordered towards the middle field and extends in a weaker, tapering shape to the inner edge. This drawing clearly characterizes the species. The white-gray hind wings show some indistinct dark transverse lines.

Egg, caterpillar, pupa

The egg is yellow, small, angular, flat and has diamond-shaped depressions. The caterpillar is yellowish or light green in color. The head, breast segment and the penultimate segment are conspicuously red-brown. The doll is stocky with a tapering abdomen and curved hooks on the cremaster .

Synonyms

  • Discoloxia blomeri
  • Larentia blomeri

Occurrence

The species occurs in Central and Eastern Europe, Great Britain, Scandinavia and North Asia. It is particularly found in the higher low mountain ranges, in the Alpine foothills and the Alps and prefers rocky forest valleys, stony heaps and gorges.

Way of life

The nocturnal moths fly in two generations from late May to late July and from late August to late September. Accordingly, the caterpillar seasons are from September to October and from July to August. The caterpillars feed on the leaves of the mountain elm ( Ulmus glabra ) or the field elm ( Ulmus minor ) and pupate in a web between the leaves. The pupae overwinter.

Danger

In Germany the species occurs sporadically and is listed in category 3 (endangered) on the red list of endangered species .

swell

Individual evidence

  1. ↑ W. Forster, TA Wohlfahrt: Spanner . Franckh'sche Verlagshandlung, Stuttgart, 1974. ISBN 3-440-46625-6
  2. ↑ Manfred Koch, Wolfgang Heinicke, Bernd Müller: We determine butterflies. Volume 4: Spanner. 2nd, improved and enlarged edition. Neumann, Leipzig / Radebeul 1976, DNB 780451570 .
  3. ↑ Federal Agency for Nature Conservation (Ed.): Red List of Endangered Animals in Germany. Landwirtschaftsverlag, Münster 1998. ISBN 978-3-896-24110-8

literature

  • W. Forster, TA Wohlfahrt: Spanner . Franckh'sche Verlagshandlung, Stuttgart, 1974. ISBN 3-440-46625-6
  • Manfred Koch , Wolfgang Heinicke, Bernd Müller: We determine butterflies. Volume 4: Spanner. 2nd, improved and enlarged edition. Neumann, Leipzig / Radebeul 1976, DNB 780451570 .

Web links

Commons : Bergulmen-Spanner  - Album with pictures, videos and audio files