First Discovery of the North American Leaf-Mining Moth (Lepidoptera: Gracillariidae) in Russia: The Genetic Diversity of a Novel Pest in Invaded vs. Native Range.

Here, we report the first detection of the North American leaf-mining moth (Fitch, 1859) (Lepidoptera: Gracillariidae) on North American black locust (Fabaceae) in Primorsky Krai (the Russian Far East) in July 2022. Overall, six moths were reared from the leaf mines and identified based on adult morphology (forewing pattern and male genitalia) and three of them were DNA barcoding. Description of the leaf mines that allowed us to distinguish the damage of from other gracillariids associated with is provided.