Monochroa niphognatha is a moth of the family Gelechiidae. It was described by László Anthony Gozmány in 1953. It is found in Great Britain, Germany, Denmark, Poland, Slovakia, Hungary, Sweden, Finland, Latvia and Ukraine.Fauna Europaea
The wingspan is 13–15 mm.Svenska fjärilar Adults fly in June and July.UKMoths
The larvae feed in the stem of Persicaria amphibia.Lepiforum.de
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