Leucoptera lathyrifoliella is a moth in the Lyonetiidae family. It is found in England, Finland, Germany, Slovakia, and Romania.
The moth differs from Leucoptera laburnella as follows: forewings with postmedian costal bar longer, touching yellow upper margin of post-tornal spot, dark edgings sharper-marked, apex of wing dark fuscous; hindwings rather dark grey.Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London pdf Keys and description
The larvae feed on Lathyrus linifolius, Lathyrus pratensis and Lathyrus sylvestris. They mine the leaves of their host plant. The mine has the form of a flat, upper-surface, oval blotch without a preceding gallery, with clear greenish frass. There may be more than one mine in a single leaflet sometimes merging. Pupation takes place outside of the mine.
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External links lepiforum de