A remarkable new species of the rove beetle genus Anthobium Leach, 1819 from Eocene Baltic amber (Coleoptera, Staphylinidae, Omaliinae)

By

Shavrin, Alexey
Yamamoto, Shuhei

Type

Article

Date of Publication

2020

Original Publication

ZooKeys

Volume

973

Pages

89--101

Subjects

Anthobium , Anthophagini , fossil , Omaliini , Palaeontology , sexual dimorphism , x-ray micro-CT

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.973.53940

 

Abstract

An unusual new omaliine species,Anthobium alekseevisp. nov., is described and illustrated from Eocene Baltic amber, tentatively placed in the megadiverse genusAnthobiumLeach, 1819. A new monotypic species-group is established. The new species can easily be distinguished from other species of the genus by the larger body, shape of the subrectangular pronotum, and the presence of a median carina on the prosternum and large, subtriangular tooth on the inner side of each mesotibia, likely exhibiting a peculiar sexual dimorphism in the male. Based on the study of the specimen with support of microtomographic images, a brief comparative analysis of a new species with described extant species ofAnthobiumis provided.