The leaf and stem mines of British flies and other insects

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds


Fenusella nana (Klug, 1816)
[Hymenoptera: Tenthredinidae]

Early birch leaf edge miner

Blennocampa nana (Klug, 1816) [not 1814]
Fenusa nana (Klug, 1816) [not 1814]
Fenusella nana (Klug, 1816) [not 1814, 1818]
Messa nana (Klug, 1816) [not 1814]
Messa (Scolioneura) nana (Klug, 1816) [not 1814]
Scolioneura nana (Klug, 1816) [not 1814]
Tenthredo nana Klug, 1816 [not 1814]
Tenthredo (Allantus) nana Klug, 1816 [not 1814]
Tenthredo (Blennocampa) nana Klug, 1816
Tenthredo (Selandria) nana Klug, 1816
Tenthredo intercus Zetterstedt, 1838. [Unavailable]
Phyllotoma melitta Newman, 1870
Phyllotoma mellita Newman, 1870
Fenusa quercus Cameron, 1885
Scolioneura laeta Enslin, 1918 [not 1917].

Leaf miner: Large blotch, starting from the leaf margin. The very first triangular part of the mine is filled with a dense mass of frass, caused by lateral movements of the larva that actually press the frass in this first mine segment. The mine seems full depth, but actually is upper-surface, abeit very deep and (fresh) only very weakly greenish. Pupation outside the mine (Bladmineerders van Europa).

The mine is also illustrated in British leafminers.

Larva: The larvae of sawflies have a head capsule, chewing mouthparts with opposable mandibles, six thoracic legs and abdominal legs (although they may be reduced) (see examples).

The larva is intially green and then turns a dark yellow colour towards maturity (British leafminers). The larva is also illustrated in Bladmineerders van Europa.

Pupa: The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.

Adult: The adult is illustrated in ECatSym - Electronic World Catalog of Symphyta.

Hosts in Great Britain and Ireland:

Betula       British leafminers
Betula       Pitkin & Plant

Hosts elsewhere:

Betula ermani     Bladmineerders van Europa
Betula humilis     Bladmineerders van Europa
Betula japonica     Bladmineerders van Europa
Betula obscura     Bladmineerders van Europa
Betula pendula Silver Birch British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Betula pubescens Downy Birch British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Summer and Autumn (British leafminers).

Time of year - adults: Currently unknown.

Comments: Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.

Distribution in Great Britain and Ireland: Britain including Bedfordshire, Berkshire, Buckinghamshire, Derbyshire, South Lancashire, South-east Yorkshire, Surrey, Warwickshire and West Suffolk (NBN Atlas).

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

Distribution elsewhere: Widespread in continental Europe including Austria, Belgium, Bulgaria, Czech Republic, Danish mainland, Finland, French mainland, Germany, Luxembourg, Norwegian mainland, Poland, Romania, Russia - Central, Sweden and The Netherlands (Fauna Europaea).

NBN Atlas links to known host species:

Betula pendula, Betula pubescens

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.

External links: Search the internet:

Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist

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Last updated 18-Oct-2019  Brian Pitkin Top of page