Leaf mine: Full depth transparent blotch without a clear preceding corridor, quickly and strongly widening from the start. Frass in sausage-shaped granules. Often several leaflets of a composite leaf each have a mine (Bladmineerders van Europa).The mine is also illustrated in British leafminers.

Larva: The larva is illustrated in Bladmineerders van Europa and British leafminers.

Fenella nigrita larva Image: Willem Ellis (Bladmineerders van Europa)

Pupa: Details unknown.

Adult: Details unknown.

Comments: Potentilla palustris is treated as Comarum palustre (Marsh Cinquefoil) by Stace (2010).

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: Bivoltine: summer & autumn (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: Britain including Bedfordshire, Buckinghamshire, Caernarvonshire, Cardiganshire, Surrey and West Cornwall (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, Poland, Romania, Slovakia, Spanish mainland, Sweden, Switzerland, The Netherlands. 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.