Phytomyza crassiseta


The larva of the fly Phytomyza crassiseta mines the leaves of Germander Speedwell, Wood Speedwell and Heath Speedwell, producing a narrow mine which follows the leaf margin, then turns and forms a secondary blotch.

Identification difficulty

Adult Leafmine


In areas where the larval foodplants occur.

When to see it

The mines can be seen in June-July and September-November.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Rare or under recorded in Leicestershire and Rutland.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map