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Elachista pomerana
Fen Dwarf Frey, 1870
Elachistidae
605 / 38.035
Photo © Chris Lewis,  Strumpshaw Fen, 09/09/2011

Similar Norfolk Species
Sweet-grass Dwarf
Elachista poae
Black-headed Dwarf
Elachista atricomella
Wingspan: 8-10mm.
Flight: April - Sept. (3 gens?)
Foodplant:   Wood Small-reed, Smooth Meadow-grass, Reed Canary-grass, others
Nat Status: pRDB1
Verification Grade:  Adult: 4
Norfolk Status
Endangered (proposed as a future Red Data Book species) Restricted to damp fenland in parts of East Anglia. Known from Stalham, Sutton Fen, Catfield Fen and Strumpshaw Fen in Norfolk, and Woodwalton Fen in Huntingdonshire.

The angulate fascia helps separate this species fromsimilar species except E. poae.

First recognized as British from specimens taken at Stalham, Norfolk in 1967 (E.C. Pelham-Clinton)

Leaf-mine: April (June, Aug)
Mine from leaf tip downwards covering full width of leaf at first, then irregular central line.

[MBGBI vol3 p378]

Determination by Genitalia Examination (gen. det.) Required

Recorded in 2 (3%) of 69 10k Squares.
First Recorded in 1967.
Last Recorded in 2018.

Latest 5 Records
Date#VC10k Area
02/08/2018127TG32 - Stalham/Catfield
20/07/2016+27TG30 - Brundall/Cantley
19/07/2016127TG30 - Brundall/Cantley
23/07/2014127TG32 - Stalham/Catfield
02/06/2014+27TG32 - Stalham/Catfield
Further info: Elachista pomerana
 
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