Abstract
Fossil Corylophidae are poorly known. Three fossil representatives of the family were described until now: one from mid-Cretaceous (Mesozoic) and two from Eocene (Cenozoic) deposits. We revise corylophid material from Baltic amber using X-ray micro-computed tomography (μCT) and describe two new species: Clypastraea venedorum n. sp. and C. groehni n. sp. The systematic placement of the previously described Baltic amber fossil Clypastraea primainterparesAlekseev, 2016 was confirmed. The re-description and diagnosis will help the systematic study on the extant and extinct species of the family. Micro-CT was used for the first time to study a members of Corylophidae. An identification key for Eocene representatives of the genus Clypastraea is provided. The species-rich palaeofauna of this group of corylophid beetles (the most diverse fossil record to date) is briefly discussed in the context of diverse plant communities of Eocene amber forest.
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