The first extinct species of Monolepta Chevrolat (Coleoptera: Chrysomelidae: Galerucinae) from Bitterfeld amber, described using X-ray micro-computed tomography.

Based on a well preserved female specimen from Bitterfeld amber, Monolepta rappsilberi sp. nov. is described and illustrated using X-ray micro-computed tomography (CT). It is the second reported member of Chrysomelidae from this fossil resin and the first described fossil Monolepta representative. The fossil species represents a lineage that is extinct in Recent Europe. A longitudinal carina on abdominal ventrite 5 of the female is a unique character for the subfamily Galerucinae.

Fossil Melandryidae (Coleoptera: Tenebrionoidea) from Eocene Baltic amber of the Sambian peninsula: new genus, six new species, new records and key to described taxa.

Six new extinct representatives of the family Melandryidae, namely Electroxylita chronographica gen. et sp. nov., Madelinia capillata sp. nov., Microscapha kugelanni sp. nov., Phloiotrya inmarinata sp. nov., Symphora pollocki sp. nov., and S. glaesonauta sp. nov. are described from inclusions in Eocene Baltic amber. Twenty-eight additional fossil specimens of melandryid beetles belonging to ten species are reported. A list of Melandryidae described from Baltic amber is compiled and an identification key is provided.

Description of the first extinct member of the tribe Anaglyptini (Coleoptera: Cerambycidae) from European Tertiary.

New longhorn beetle taxon, Acanthoglyptus picollus gen. et sp. nov., is described and figured from Baltic amber found in the Baltic Sea coast, Yantarny settlement, Kaliningrad Region, Russia. The new amber inclusions presented here prove the occurrence of the tribe Anaglyptini in the 'Baltic amber forest', giving this group at least a Palaeogene age. The closest living relative of the extinct beetle appears to be the Chinese genus Yoshiakioclytus Niisato, 2007. A brief updated list of the described longhorn beetles from European ambers, including 6 subfamilies, 17 tribes, 25 genera, and 27 species is compiled.

A new fossil Eurypinae genus and sexual dimorphism in the representatives of Omineus (Coleoptera: Mycteridae) from Tertiary amber of Europe.

Europoeurypus inglaeso gen. et sp. nov. is described from Eocene Baltic amber found on the Sambian Peninsula, Kaliningrad Region, Russia. Four additional specimens of mycterid beetles from collections of Baltic amber are reported. The secondary sexual characters and sexual dimorphism in the Eocene representatives of the genus Omineus Lewis, 1895 are documented for the first time and examined using X-ray micro-computed tomography (µCT). The studied Omineus male specimens were attributed to the fossil species Omineus febribilis Alekseev, Pollock Bukejs, 2019. A key to fossil species of Eurypinae from Eocene ambers is provided and several aspects of the biogeography of the subfamily Eurypinae are discussed.