Plant Parasites of Europe

leafminers, galls and fungi

Etainia decentella

Etainia decentella (Herrich-Schäffer, 1855)

sycamore-seed pigmy

Etainia decentella mine

Acer pseudoplatanus, Belgium, prov. West-Vlaanderen, Ooigem © Steve Wullaert


The species has two annual generations. The larvae of the first generation live in the flower buds; The larva of the second generation makes a corridor in the wing of the key. According to Jäckh (1951a) the larva leaves the seed untouched. Th infested keys therefore do not fall off, and have to be searched on the tree, Pupation outside the mine.

host plants

Sapindaceae, monophagous

Acer campestre, monsspessulanum, obtusatum, pseudoplatanus, sempervirens.


Mining larvae in June – July (Hering, 1957a).


BE recorded (Phegea, 2009).

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

LUX not recorded (Fauna Europaea, 2009).

distribution within Europe

From Sweden to Iberia, the Alps, and Greece, and from Britain to the Ukraine (Fauna Europaea, 2009; A & Z Laštuvka, 2008a).


Lemon yellow, head light brown (Jäckh, 1951a).


Ectoedemia, Stigmella, decentella; Ectoedemia, Nepticula monspessulanella (Jäckh, 1951).


Alders (2004a), Bengtsson (2008a), J Černý (2001a), Emmet (1971a, 1983a), Hering (1921b, 1934b, 1957a), Huemer & Mayr (2000a), Huisman & Koster (1996a), Huisman, Koster, van Nieukerken & Ellis (2007a), Huisman, Koster, van Nieukerken & Ulenberg (2001a, 2003a), Jäckh (1951a), Johansson ao (1990a), Johnson (1982a), Klimesch (1956c), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Langmaid & Young (2009a), A & Z Laštuvka (1997a, 2008a), van Nieukerken (1986a), van Nieukerken, Doorenweerd, Hoare & Davis (2016a), van Nieukerken, A & Z Laštuvka (2006a), Robbins (1991a), Skala (1939a), Szőcs (1977a, 1981a), Vos (2017a), Wieser (2004a).

Last modified 20.v.2021