Leaf mine: A large brownish blotch, without an initial corridor. Usually the mine starts near a vein axil, and expands towards the leaf margin. The mine mostly remains enclosed by two thick lateral veins; only near the leaf margin (and especially in thin shadow leaves) the mine may trespass over the side veins. Often several mines in a leaf. The mine is upper surface, but quite deep, specially when the larva is young not all tissue is eaten away, and the mine keeps a greenish tinge there. Contrary to Heterarthrus vagans, at least as common on the same host, the larva vacates the mine prior to pupation (Bladmineerders van Europa).

A large, brown upper surface blotch, initially between veins and running towards the margin (British leafminers).

Larva: The larva is illustrated in British leafminers and Bladmineerders van Europa. The larva vacates the mine prior to pupation (Bladmineerders van Europa).

Pupa: Details unknown.

Adult: Details unknown.

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: Bivoltine - early summer onwards. Trivoltine in a good year (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: Very common (British leafminers) including Bedfordshire, Cambridgeshire, Cheshire, Cumberland, Derbyshire, Glamorgan, Mid-west Yorkshire, Monmouthshire, North Wiltshire, North-west Yorkshire, South Essex, South Lancaster, South Wiltshire, Surrey, West Gloucestershire, West Suffolk and Worcestershire (NBN Gateway - N.B. includes Watsonian Vice Counties having publicly available records that fall within or overlap the vice county border at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below).

Also recorded in the Republic of Ireland (van Achterberg in Fauna Europaea).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution elsewhere: Widespread in continental Europe including Austria, Belgium, Bulgaria, Corsica, Croatia, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Luxembourg, Poland, Romania, Russia - Central, Slovakia, Spanish mainland, Sweden, Switzerland, The Netherlands and Ukraine. Also recorded in the Nearctic region (van Achterberg in Fauna Europaea).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: Unknown.