Heterarthrus cuneifrons Altenhofer & Zombori, 1987
Acer pseudoplatanus, Baarschot
mine lighted from behind; the larva used to be quite sluggish, but the strong light of the scanner made it move violently, resulting in bizarre colours.
larva in almost finalised cocoon
Acer pseudoplatanus, België, Antwerpen © Chris Snyers
Acer pseudoplatanus, Belgium, prov. East-Flanders, Volkegembos ~ Bos t’Ename © Carina Van Steenwinkel: two young mines, each with two larvae …
… some days later
an abnormal situation: the excisions are completed, by no cocoons haven been made below; the mine was vacated.
A large, practically full depth blotch without an apparent initial corridor, starting in the centre of a leaf. By fusion of mines several larvae may occur together. The full grown larve makes a circular cocoon, attached to upper epidermis. Before that a circular cut has been made in the upper epidermis. The completed cocoon falls out of the mine together with the disk of upper epidermis.
Sapindaceae, narrowly monophagous
Larvae were found in the first half of June; the cocoon was made one week later.
BE found in 2007 by Paul Fontaine in the Forêt des Soignes near Brussels.
NE recorded (Ellis, 2006).
LUX not recorded.
distribution within Europe
Described from Lower Austria; found not much later in Britain. Locally common there in 2013 (Homan, 2014a).
Liston (1995a) stated that the valid name for this species was H. wuestneii (Konow, 1905), but this was redressed by Dathe, Taeger & Blank (2001a).
Chris Snyers discovered that regularly mines are found with two larvae. As is shown in his picture they are the result of two independent ovipositions, a few mm apart.
Altenhofer (1980a, 2003a), Altenhofer, Hellrigl & Mörl (2001a), Altenhofer & Zombori (1987a), Boevé ao (2009a), Dathe, Taeger & Blank (2001a), Homan (2014a), Liston (1995b), Liston & Blank (2006a), Liston, Mutanen & Viitasaari (2019a), Pschorn-Walcher & Altenhofer (2000a), Späth & Liston (2003a), Taeger, Blank & Liston (2006a), Taeger ao (1998a).