Selenia dentaria

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Selenia dentaria
Selenia dentaria01.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Selenia
Species:
S. dentaria
Binomial name
Selenia dentaria
(Fabricius, 1775)

Selenia dentaria, the early thorn, is a moth of the family Geometridae. It is found in Northern Europe, and across the Palearctic to the Caucasus, Transcaucasia, North Siberia, Russian Far East, Amur and Mongolia.

Contents

Description

The wingspan is 28–40 mm. The wings are scalloped and there are 3 crosslines on the forewings. There is a dark stain at the apex of the forewing. Adults are extremely variable in colour. Distinguished by the less deep excision between the radials of the hindwing, less rich colouring, enlarged costal spots at the origin of the lines, a median area not differentiated in colour from the distal area, transparent discal marks not well developed. The spring form is large, strongly irrorated with fuscous, sometimes more olivaceous.the median and postmedian lines darkened into a band. -ab. illunaria Esp. is the summer generation, much smaller and much lees irrorated. Sometimes pale, sometimes warmer brown. - ab. minima Strand is a dwarfed form, sometimes sharply marked, frequent in Arctic Norway. [1]

Caterpillar Selenia dentaria larva.jpg
Caterpillar

The larva is orange-brown or reddish brown, sometimes inclining to purplish; mepo- and metathorax enlarged laterally, 4th—5th abdominal swollen, with small dorsal humps; anterior segments marked with bright orange.

Biology

The moth flies in two generation from April to August .

The larvae feed on various deciduous trees, such as birch and alder.

Notes

  1. ^ The flight season refers to Belgium and The Netherlands. This may vary in other parts of the range.

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References

  1. Prout , L.B. 1912–16. Geometridae. In A. Seitz (ed.) The Macrolepidoptera of the World. The Palaearctic Geometridae, 4. 479 pp. Alfred Kernen, Stuttgart.