A new genus of the family Mycetophagidae (Coleoptera) from Eocene Danish amber

Aggerbille havai gen. et sp. nov. is described from late Eocene Danish amber. The new genus differs from the genus Triphyllus Dejean, 1821 by antennomeres 9 and 10 longer than wide, pronotum more strongly narrowed toward the apex, and shorter elytra; from the genus Neotriphyllus Lawrence et al., 2014 by its smaller body size, pronotum more strongly narrowed towards the apex, mesoventrite flattened, and its body covered with dark, long, decumbent setae. It is distinguished from the genus Litargus Erichson, 1846 by its posterior pronotal angles obtuse and not embracing the elytral humeri. Aggerbille differs from the genus Crowsonium Abdullah, 1964 by its pronotum being broadest at the base and by its distinct antennal club consisting of three segments. This is the first named Mycetophagidae from late Eocene Danish amber.