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New records of Eulagius acernus show its established presence in north-western France, suggesting adaptation to local environments.
Eulagius acernus Motschulsky, 1845 (Coleoptera, Mycetophagidae) is a sapromycetophagous species that was previously only known to be present in the Caucasus and north-eastern Turkey. It has now been discovered for the first time in France in several departments in the north-west of the country. Its presence in some isolated localities, as well as its records in woods and forests from traps or from under bark suggests that this species is established in France. This work presents images of E. acernus individuals from France and Georgia, as well as images of holotypes and syntypes of other Eulagius species from the same species group, when original descriptions do not include any photos.
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Soldati et al. (2026) studied this question.
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