The first water-penny beetle (Coleoptera: Psephenidae) in Baltic amber, with a list of Dryopoidea described from the mid-late Eocene European ambers

Based on a well-preserved adult inclusion in Baltic amber, the first extinct species of the subfamily Eubriinae and the first representative of the family Psephenidae from the Eocene fossil resin is described and illustrated. The new fossil species belonging to the extant genus, Macroeubria groehni sp. nov., is compared with related extant taxa. Two additional fossil records of previously described Dryopoidea from Eocene Baltic amber of the Sambian Peninsula deposited in the collection of the Kaliningrad amber museum are provided. A brief updated list of the described Dryopoidea species from Baltic and Rovno ambers is compiled. The currently described diversity of the superfamily in the mid-late Eocene European ambers consists of 11 extinct species belonging to nine genera within five families.