Seq # 602110080

Cyclophora quercimontaria (Bastelberger, 1897) Species

Last modified: Oct. 23, 2023, 3:29 p.m.

A very rare species in Belgium, not seen for a long time. (last known record Hasselt (LI), 1948)


Family: Geometridae > Subfamily: Sterrhinae > Tribus: Cosymbiini > Genus: Cyclophora > Species: Cyclophora quercimontaria
Vernacular names
Bruine oogspanner (NL), L'Ephyre de Bastelberger (FR), Gelbroter Eichen-Gürtelpuppenspanner (DE)
First mention in Belgium
Berger L. A. 1949a. Espèces nouvelles pour la faune belge (suite). — Lambillionea 49: 23. On page 23.




Wingspan: 24–25 mm. This species is very similar to the generally slightly larger and lighter and more yellowish-colored Cyclophora punctaria) and can hardly be distinguished from it based on the wing characteristics. The forewing and hindwing have the same orange-brown ground color with dense dark red speckles and a thick, dark red central transverse line. This middle transverse line bends inwards near the leading edge of the forewing so that it ends perpendicular to it. The second generation is always smaller.

Museum specimens

Specimens in nature

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The species overwinters as a pupa attached to a branch or twig of the host plant. The adults come to light.

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Flight periods

The moths are on the wing from late April/late May in one generation, sometimes a partial second generation occurs from late July to early August.

Observed on

Host plant (genera):

The monophagous larva lives on Quercus.

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It frequents light oak groves, particularly downy oak groves, and well-exposed hillsides.

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