Rheumaptera undulata
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| Rheumaptera undulata | |
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| Species: | R. undulata
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| Binomial name | |
| Rheumaptera undulata | |
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The Scallop shell (Rheumaptera undulata) is a moth of the Geometridae family. It is found in most of the Palearctic ecozone and North America.
The wingspan is 25–30 mm. The ground colour of the forewings is pale.The cross-lines are darker, wavy, evenly spaced and numerous. The outer margin is pale brown with a scalloped fringe. The hindwings resemble the forewings but are paler.
There is one generation per year with adults on wing from the end of May to August in Europe.
The larvae feed on birch (including Betula verrucosa and B. pubescens), Vaccinium (including V. myrtillus and V. uliginosum) and willow species (including Salix myrtilloides, S. caprea, S. aurita, S. cinerea, S. myrsinifolia and S. phylicifolia), as well as Populus tremula, Populus balsamifera, Berberis vulgaris, Ribes alpinum, Spiraea salicifolia, Sorbus aucuparia, Elaeagnus commutata and Myrica gale. Larvae can be found in August and September. It overwinters as a pupa.
Subspecies
- Rheumaptera undulata undulata
- Rheumaptera undulata sajana Bryk, 1921
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