Phyllocnistis labyrinthella is a moth of the family Gracillariidae. It is found in most of continental Europe, except Italy, the Mediterranean Islands and parts of the Balkan Peninsula.

| Phyllocnistis labyrinthella | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Gracillariidae |
| Genus: | Phyllocnistis |
| Species: | P. labyrinthella |
| Binomial name | |
| Phyllocnistis labyrinthella (Bjerkander, 1790) | |
| Synonyms | |
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The wingspan is 6–7 mm.
The larvae mine the leaves of Populus alba and Populus tremula. The mine consists of a very long, broad epidermal corridor that winds in dense loops over the upperside (and often also the underside) of the leaf without ever intersecting intself. The frass is deposited in a continuous brownish-black central line. The corridor ends at the leaf margin, where it widens somewhat while the leaf margin folds over.
| Taxon identifiers |
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