About Closterotomus biclavatus (Herrich-Schaeffer, 1835)
Closterotomus biclavatus shows a clear difference in size between sexes: males reach 5.5–7 millimetres (0.22–0.28 in) in length, while females reach 6.5–7.6 millimetres (0.26–0.30 in). Body color of this species is quite variable, but individuals are usually black or dark brown, with brown or dark brown legs. A distinguishing feature that can be used to identify this species even in young specimens is the enlarged, blackened apex of the second antennal segment. This species is present across most of Europe. Its preferred habitats include trees and bushes, wet forests, edge rows, and spruce forest edges.
