Seq # 185120120

Caloptilia roscipennella (Hübner, 1796) Species

Last modified: April 10, 2021, 10:55 a.m.

A rare species in Belgium, with the bulk of observations in Flanders.


Family: Gracillariidae > Subfamily: Gracillariinae > Tribus: Gracillariini > Genus: Caloptilia > Species: Caloptilia roscipennella
Vernacular names
Walnootsteltmot (NL)
Caloptilia roscipennella sensu auct.
First mention in Belgium
De Fré Ch. 1858. Catalogue des Microlépidoptères de la Belgique. — Annales de la Société entomologique belge 2: 45–162. On page 146. view page




Forewings ochreous, sometimes with a rosy tinge, some scattered dark brown dots on costa and inner margin. Some specimens have a greyish ground colour.

Museum specimens

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Specimens in nature


Licht green.

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The first instars live in a rather long serpentine mine on either side of the leaf. This gallery leads to a small and narrow blotch at the edge of the leaf. Later instars bend the leaf to the underside and feed from within that cone.
See also and


No real cocoon, just a silken membrane.

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Pupation under a silk membrane in a conical roll at the edge of a leaf. The adults hibernate.

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Flight periods

One generation per year: August, after hibernation till May.

Observed on

Host plant (species):
Juglans regia

Monophagous on Juglans regia.

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