Lampronia fuscatella (Tengström, 1848)

scarce bright

on Betula

Lampronia fuscatella: gall on Betula pendula

Betula pendula, Belgium, prov. Luxembourg, Seloignes, Réserve naturelle de la Fourchinée © Stéphane Claerebout

Lampronia fuscatella: galls on Betula pendula

Betula pendula, Hungary, Kimle, 17.iv.2019 © László Érsek

several galls in a row

Lampronia fuscatella: gall with exit opening

old gall with exit opening

Lampronia fuscatella: opened gall

opened gall

Lampronia fuscatella: gall with cocoon

gall with cocoon inside

Lampronia fuscatella: cocoon

cocoon

Lampronia fuscatella: larva

20.vii.2019, larva in the gall

Lampronia fuscatella: larva

larva, dorsal view

Lampronia fuscatella: larva

head and pronotum

Lampronia fuscatella: larva

larva, ventral view

Lampronia fuscatella: larva

head and sternum

Lampronia fuscatella: galls on Betula [pendula

abdomen end, ventral view

gall

More or less rotund swelling in branches of 3-13 mm diameter, generally at a node; often several adjacent nodes are galled. Larva usually solitary. It is fully grown near the end of the summer, and hibernates in the mine. In spring an exit hole is prepared, closed with silk and camouflaged at the outside with reddish-brown frass. Then a tough, whitish cocoon is made in which pupation takes place. The moths appear in May-June.

host plants

Betulaceae, monophagous

Betula pendula, pubescens.

synonyms

Incurvaria tenuicornis Stainton, 1854.

references

Bowdrey (1988a), Buhr (1964a), Heath & Pelham-Clinton (1983a), Kurz (2016a), Redfern & Shirley (2011a), Roskam (2009a), Vuorinen & Vikberg (2011a).

mod 18.x.2019