Wingspan 6 mm. Most likely to be recorded from vacated mines and leaf cut-outs. The mines occur on Dogwood, the larva eating out a short gallery leading to a blotch, then cutting an oval case.

Antispila metallella, Antispila treitschkiella.

Adult  Leafmine

Adult moths need to be confirmed by gen det. Leafmine records must state the host species and include an image of the mine measured against a millimetre rule. 

Woodland, downland and scrubland where Dogwood occurs.

Leafmine: Aug to October.

Larva mines leaves of Dogwood, subsequently living within a movable case, and over-wintering as a pupa.

Local in southern England, north to Yorkshire.

Rare, or rarely recorded in Leicestershire and Rutland.

http://www.leafmines.co.uk/html/Lepidoptera/A.petryi.htm

https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/lepidoptera/monotrysia/adeloidea/heliozelidae/antispila/antispila-petryi/