Lemna Duckweed
See also Spirodela, greater duckweed
Dichotomous table for leafminers
1a larva a maggot; pupation within the mine: Hydrellia albilabris
1b larva with recognisable head; pupation external => 2
2a larva without feet: Tanysphyrus lemnae
2b larve with thoracic feet: Cataclysta lemnata