Agromyza alnivora Spencer, 1969
[Diptera: Agromyzidae]

Agromyza albitarsis Zetterstedt, 1848. Diptera Scandinaviae. 7: 2735. [Preoccupied by Agromyza albitarsis Meigen, 1830]
Agromyza alnivora Spencer, 1969c. Beitr. Ent. 19: 7.
Agromyza alnivora Spencer, 1969c; Spencer, 1972. Handbk ident. Br. Ins. 10(5g): 37 (figs 116-8), 39, 42, 109.
Agromyza alnivora Spencer, 1969c; Spencer, 1976. Fauna ent. Scand. 5(1): 93-5, figs 131-133.
Agromyza alnivora Spencer, 1969c; Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 54, 60 (fig. 226), 61, 100, 178.

Leaf-mine: Larva forming a linear leaf-mine, considerably widening at end (Spencer, 1976: 94-95, fig. 133).

An upper-surface corridor, initially very shallow, gradually widening (often quite broad in the end), not associated with leaf margin or veins; mature mine often with a characteristic brown colouration. Frass in two rows. The gold-coloured larva leaves the mine before pupation, through a semicircular exit slit in the upper epidermis (Bladmineerders van Europa).

An upper surface gallery, narrow at first but, widening considerably towards the end (British leafminers).

Larva: The larva is illustrated in Bladmineerders van Europa.

Puparium: Details unknown.

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July, August-September.

Time of year - adults: September and June-July the following year.

Distribution in Great Britain and Ireland: Widespread in Britain including Kent (St Mary's Cray), Oxford (Hogley), Cambridge (Chippenham Fen) (Spencer, 1972: 39), Warwickshire (Coventry) (Robbins, 1991: 78), Inverness (nethy Bridge) (Spencer, 1972: 39), the Inner Hebrides (Isle of Coll, Arinagour) (Bland, 1992), Hampshire (Fleet) (British leafminers) and Shropshire, South Wiltshire, Stafford, Surrey, West Gloucestershire 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).

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, Denmark, Finland, Germany, Holland, Norway, Romania, Sweden (Spencer, 1976: 95), Czech Republic, French mainland, Lithuania, Poland and Slovakia (Martinez in Fauna Europaea).

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

Parasitoids in Britain and elsewhere:

Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Gateway