Acer campestre, Britain © Rob Edmunds

mine

The mine begins as an inconspicuous, short, lower-surface epidermal gallery. This widens into a small triangular blotch, usually in a vein axil. The mine in this stage is rather transparent. Older larvae live free in a leaf cone, made by folding down a leaf segment. In the course of its free life the larva makes three cones, of increasing size, either on the same leaf or not. Pupation in a flat, parchement-like, shining, yellowish white cocoon on either side of the leaf, generally near the margin (Emmet ao, 1985a).

hostplants

Sapindaceae, narrowly monophagous

Acer
campestre.

Rarely transgressing to Acer pseudoplatanus (Emmet ao, 1985a).

phenology

Larvae in two generations, May-June and June-July (Emmet ea, 1985a, Langmaid ea, 2011a)

BENELUX

BE recorded (de Prins & Spronck).

NE recorded (Huisman & Muus).

LUX not recorded (Fauna Europaea, 2011).

distribution within Europe

From Fennoscandia to the Pyrenees, Italy, and Bulgaria, and from Britain to South Russia.

larva

Pale green, head capsule light brown.

synonyms

Caloptilia onustella (Hübner, 1813) (cf De Prins & De Prins, Global Taxonomic Database of Gracillariidae (Lepidoptera), 2011); Caloptilia hauderi of British authors (cf Langmaid ao, 2011a).

notes

Mines mainly in the higher parts of the crown (2-4) of trees growing in forests; not in hedgerows (Emmet ao, 1985a).

references

Ahr (1966a), Bengtsson & Johansson (2011a), Biesenbaum (2010a), Bengtsson (2011b), Brown (1947a), Buszko (1992b), Corver, Muus & Ellis (2011a), Emmet, Watkinson & Wilson (1985a), Hering (1924b, 1934b, 1957a), Huemer (2012a), Huemer & Erlebach (2003a), Huisman & Muus (2020a), Kasy (1983a, 1987a), Klimesch (1950c), Langmaid, Sattler & Lopez-Vaamonde (2011a), Maček (1999a), Opheim (1977a), De Prins (2010b, 2011a), De Prins & Spronck, 2004a, Robbins (1991a), Sefrová (2005a), Skala & Zavřel (1945a), Sønderup (1949a), Stolnicu (2007a), Szőcs (1977a), Vávra (2016a).