Plant Parasites of Europe

leafminers, galls and fungi

Caloptilia elongella

Caloptilia elongella (Linnaeus, 1761)

pale red slender

Caloptilia elongella mine

Alnus glutinosa, Nieuwendam; young mine

Caloptilia elongella mine

Alnus glutinosa, Nieuwendam; old, contracted mine and leaf roll (leaf upperside)

same leaf, underside

Caloptilia elongella mine

Almus glutinosa, Amstelveen; unusual mines, with exceptionally long initial galleries

Caloptilia elongella: leaf roll

Alnus glutinosa, Belgium, prov. Hainaut, Chimay, Etang de Virelles © Stéphane Claerebout

Caloptilia elongella: leaf roll

leaf toll

Caloptilia elongella: mature larva

mature larva

Caloptilia elongella: pupa in cocoon

pupa in cocoon


The mine begins with a, usually rather short, gallery, that opens into (and often is overrun by) a silvery epidermal upper-surface blotch with light brown frass. When the mine gets older it contracts and becomes en elongate blister or even a tube. Soon the larva leaves the mine and continues feeding within a downwards rolled leaf margin, that is fastened with silk. Pupation in a transparant, yellow-shining cocoon, generally at the leaf margin.

host plants

Betulaceae, monophagous

Alnus glutinosa, incana.


Larvae are found from March till October, without a clear seasonal maximum; hibernation as adult.


BE recorded (Phegea, 2009).

NE recorded (Kuchlein & de Vos, 1999a;, 2009).

LUX recorded (Fauna Europaea, 2009).

distribution within Europe

All of Europe (Fauna Europaea, 2009).



Described by Patočka & Zach (1995a), Patočka & Turčáni (2005a).


Gracillaria elongella.

parasitoids, predators

Sympiesis sericeicornis.


Also the rolled leaf margin disinguishes elonngella from the much rarer C. falconipennella: the leaf roll of elongella is much larger (Huisman ao, 2003a).


Ahr (1966a), Beiger (1980a), Bengtsson & Johansson (2011a), Biesenbaum (2010a), Boot (1989a), Brown (1947a), Buhr (1935a, 1964a), Buszko (1992b), Corley, Marabuto & Pires (2007a), Corley, Rosete, Gonçalves ao (2018a), Deutschmann (2008a), Drăghia (1972a), Emmet, Watkinson & Wilson (1985a), Haase (1942a), Hartig (1939a), Hering (1924b, 1957a), Huisman ao (2003a), Jaworski (2009a), Klimesch (1950c), Kozlov & Kullberg (2010a), Kuchlein & de Vos (1999a), Maček (1999a), Nowakowski (1954a), Opheim (1977a), Patočka & Turčáni (2005a), Patočka & Zach (1995a), De Prins (2010a)l De Prins & Steeman (2013a), Robbins (1991a), Schütze (1931a), Skala & Zavřel (1945a), Sønderup (1949a), Szőcs (1977a), Zoerner (1969a, 1970a).

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