Southern broad-lined dwarf tensioner

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Southern broad-lined dwarf tensioner
Treble Brown Spot moth (35148989621) .jpg

Southern broad-lined dwarf moth ( Idaea trigeminata )

Systematics
Order : Butterflies (Lepidoptera)
Family : Spanner (Geometridae)
Subfamily : Sterrhinae
Tribe : Sterrhini
Genre : Idaea
Type : Southern broad-lined dwarf tensioner
Scientific name
Idaea trigeminata
( Haworth , 1809)

The southern broad-lined dwarf moth ( Idaea trigeminata ), also called pale yellow bird knotweed , is a butterfly ( moth ) from the spanner family (Geometridae). The species name is derived from the Latin word trigeminus with the meaning "triple" and refers to the shape of the shadow band between the outer transverse line and the wavy line.

features

butterfly

The moths reach a wingspan of 16 to 22 millimeters, that of the somewhat smaller second generation measures around 14 millimeters. The basic color is creamy white to pale yellow. On the upper side of the forewing, a very distinctive, dark gray band made up of oval spots extends between the outer transverse line and the wavy line, which is interrupted in the front third and continues in a weakened form on the hind wings. At the front edge there is a narrow black-brown stripe from the wing root to the cell . All wings show small black discal spots .

Caterpillar

Adult caterpillars are brown in color, slightly keeled on the sides, with strong transverse folds and individual, long, whitish, curved, thin hair bristles. The light back line is interrupted just like the dark side back lines. A dark angular drawing stands out on the back. The sixth abdominal ring is provided with a light spot on the back.

Similar species

Idaea trigeminata, with a broken band Idaea biselata, with a continuous band
Idaea trigeminata , with a broken band
Idaea biselata , with a continuous band
Knotweed, a food plant of caterpillars

The broad-lined dwarf spanner ( Idaea biselata ) differs by the continuous, usually somewhat pale gray band between the outer transverse line and the wavy line on the upper side of the forewing. A narrow black-brown stripe on the front margin is missing.

Distribution and occurrence

The distribution area of ​​the southern broad-lined dwarf spanner extends primarily through very warm zones of southern and central Europe. Due to possible confusion with the broad-lined dwarf tension, some evidence in the literature is considered dubious. The species is also found in Turkey , Iran and Turkmenistan . In Lebanon , Cyprus in Israel and the Amanos Mountains it is represented by the subspecies Idaea trigeminata tenuirussata . The habitat of the southern broad- lined pygmy moth is usually limited to hot spots, for example it inhabits rocky slopes, hedges, heather and oak forests as well as gardens and maquis formations . In the Alps the species rises to around 700 meters, in Turkey to 1900 meters.

Way of life

The southern broad-lined dwarf moth forms one generation a year in the northern regions, whose moths fly in June and July. Under favorable conditions, a second generation can emerge from the beginning of August to mid-September. The moths are active at dawn and are often found near artificial light sources . The caterpillars overwinter and feed on low plants, primarily bird knotweed ( Polygonum aviculare ).

Individual evidence

  1. ^ Arnold Spuler : The Butterflies of Europe , Volume 2, E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, 1910, p. 16
  2. ↑ a b c d Axel Hausmann & Jaan Vidalepp: The Geometrid Moths of Europe Volume 3 Subfamily Larentiinae I , Apollo Books, Aamosen, 2012, ISBN 978-87-88757-39-2 , pp. 185-187
  3. ^ A b Walter Forster & Theodor A. Wohlfahrt : The butterflies of Central Europe, Volume 5, Spanner. (Geometridae). Franckh'sche Verlagshandlung, Stuttgart 1981, ISBN 3-440-04951-5 , pp. 27/28
  4. ↑ Manfred Koch , Wolfgang Heinicke, Bernd Müller: We determine butterflies. Volume 4: Spanner. 2nd, improved and enlarged edition. Neumann, Leipzig / Radebeul 1976, DNB 780451570 , p. 76/77

literature

  • Axel Hausmann: The Geometrid moths of Europe, 2nd Sterrhinae. Apollo Books, Stenstrup 2004, ISBN 87-88757-37-4
  • Arno Bergmann: The large butterflies of Central Germany. Volume 5/1: Spanner. Distribution, forms and communities. Urania-Verlag, Jena 1955, DNB 450378403 .
  • Günter Ebert (Ed.): The butterflies of Baden-Württemberg Volume 8, Nachtfalter VI (Spanner (Geometridae) 1st part), Ulmer Verlag Stuttgart 2001. ISBN 3-8001-3497-7

Web links

Commons : Southern Broad-Lined Zwergspanner  - Collection of images, videos and audio files