Stigmella assimilella is a moth of the family Nepticulidae. It is found in most of Europe (except Ireland and the Balkan Peninsula), east through Russia to the eastern part of the Palearctic realm.

| Stigmella assimilella | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Nepticulidae |
| Genus: | Stigmella |
| Species: | S. assimilella |
| Binomial name | |
| Stigmella assimilella (Zeller, 1848) | |
| Synonyms | |
| |
Its wingspan is 5–6 millimetres (0.20–0.24 in). The larvae mine the leaves of their host plant, which typically includes species of aspen including Populus alba, Populus canescens and Populus tremula.
| Taxon identifiers |
|
|---|