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Elachista pomerana
Fen Dwarf Frey, 1870
Elachistidae
605 / 38.035

Similar Suffolk 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

Morley’s Final Catalogue: Not listed.

Recent Status: The species was first recorded as British during 1967 in Norfolk Broadland. It is restricted to Broadland and the fens of Cambridgeshire and Huntingdonshire. There are two Suffolk records for Minsmere.

Life Style: The moth is double or triple brooded being found from May till September. The larvae mine leaves of Calamagrostis epigejos. They pupate on a silken pad on the foodplant away from the mine.

Identification: The moth is a small dark winged species with whitish markings. The female is more strongly marked than the male.. The fascia at one third on the costa is angled it may be broad in the female but narrow and not reach the dorsum in the male. The tornal and slightly beyond costal spot are large in the female and may join but the dorsal spot in the male may be much reduced. Genitalia dissection is required for a record. More Info
The larvae mine downwards in a broad gallery from the oviposition site near the tip of a leaf. They are green with a pale brown head and prothoracic plate.

Determination by Genitalia Examination (gen. det.) Required

Recorded in 1 (2%) of 58 10k Squares.
First Recorded in 2006.
Last Recorded in 2006.

Latest 5 Records
Date#VC10k Area
18/07/2006125TM46 - Minsmere/Leiston
18/07/2006125TM46 - Minsmere/Leiston
Further info: Elachista pomerana
 
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