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Elachista pomerana
Fen Grass-miner Frey, 1870
Elachistidae
605 / 38.035
Photo © Steve Joyner,  15/05/14 confirmed by gen det J Clifton

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Similar Species
Sweet-grass Miner
Elachista poae
Cock's-foot Miner
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
Status
Rare.
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 from similar 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 Required

Recorded in 3 (4%) of 74 10k Squares.
First Recorded in 1967.
Last Recorded in 2023.

Latest 10 Records
Date#VC10kArea
05/06/2023227TG31Horning
12/08/2022127TG32Sutton Fen
10/08/2021127TG32Sutton Fen
03/06/2021127TG32Sutton Fen
31/07/2020127TG32Ingham
24/07/2020727TG32Irstead / Catfield
15/07/2020127TG32Sutton Fen
26/06/2020127TG32Irstead / Catfield
20/05/2020127TG32Sutton Fen
02/08/2018127TG32Sutton Fen
Further info: Elachista pomerana
 
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