Trifurcula (Glaucolepis) lituanica sp. n., an unexpected new stem-miner on Salvia pratensis occurring in eastern Europe (Lepidoptera: Nepticulidae)

Trifurcula (Glaucolepis) lituanica Ivinskis & van Nieukerken, sp. n., is described from adults reared from stem-mining larvae on Salvia pratensis (Lamiaceae) from Lithuania and some specimens taken as adult in Austria, Slovenia and Greece. In addition the new species is recorded from the Czech Republic and Romania. Superficially, it resembles Trifurcula (Glaucolepis) headleyella (Stainton, 1854), especially the male, but it differs by male genitalia with additional cornuti, a unique character for the subgenus, and the female genitalia differ by the larger number of convolutions in the ductus spermathecae. It is the only known Trifurcula to make its cocoon partially inside a stem-mine. DNA barcodes are provided and compared with related species.