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Heterarthrus aceris (Kaltenbach, 1856) [Hymenoptera: Tenthredinidae]. Eriocampa (Phyllotoma) aceris (Kaltenbach, 1856). Heterarthrus aceris (Kaltenbach, 1856) [not 1874]. Phyllotoma aceris Kaltenbach, 1856 [not 1874]. Heterarthrus fumipennis (Cameron, 1888). Phyllotoma fumipennis Cameron, 1888.

Leaf mine: A large upper-surface (often almost full depth) blotch, without a trace of an initial corridor, beginning in the very tip of a leaf segment. The full grown larva spins itself a disc shaped cocoon within the mine. Just before, it has made a circle of perforations in the upper epidermis with its mandibles. The the cocoon is formed, attached to the upper epidermis, and the larva becomes immobile. The perforated circle of epidermis starts to dry, warps, and finally becomes detached from the surrounding tissue and drops to the ground. The resulting excision has a diameter of about 7 mm, and is best seen when the leaf is held against the light (Bladmineerders van Europa). The mine is also described and illustrated in British leafminers. Mine of Heterarthrus aceris on Acer pseudoplatanus Image: Willem Ellis (Bladmineerders van Europa) Larva: The larva is described and illustrated in British leafminers. Like all Heterarthrus species the thoracic feet are reduced to small stumps (Bladmineerders van Europa). Pupa: Unknown. Adult: Details unknown. Hosts in Britain:. Aceraceae       Acer pseudoplatanus Sycamore British leafminers Acer pseudoplatanus Sycamore Pitkin & Plant Hosts elsewhere: Aceraceae       Acer pseudoplatanus Sycamore Bladmineerders van Europa Time of year - larvae: Univoltine: early summer (British leafminers). Time of year - adults: Unknown. Comments: Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta. Distribution in Great Britain & Ireland: Widespread (British leafminers) including Berks, North-west York, South-east York, South-west York and Surrey (NBN Gateway distribution map - GiGl and NE). Also recorded in the Republic of Ireland (van Achterberg in Fauna Europaea). NBN Grid map: Distribution elsewhere: Europe including Austria, Corsica, Croatia, Czech Republic, French mainland, Germany, Italian mainland, Poland, Sweden, ? Switzerland and ? Ukraine (van Achterberg in Fauna Europaea). NBN interactive distribution maps of known host species in Britain and elsewhere: Acer pseudoplatanus Parasitoids in Britain and elsewhere: Unknown.

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Last updated 29-Jun-2010  Brian Pitkin