Mesosa myops lives under the bark
Mesosa myops is a large, grey-mottled beetle with distinct long antennae. In Finland – and the Nordic countries as a whole – the species is only found on Ruissalo. The species is classified as vulnerable and protected. Mesosa myops is completely dependent on the dead trunks of oak and lime trees, which is where its larvae live. The best ways of protecting the species are to leave fallen tree trunks and branches on the ground and to ensure that there are oaks of varying ages in the area.
Mesosa myops larvae dig wide, twisting tunnels in the wood under the bark of the tree. Their larval stage lasts two years.
Mesosa myops / Photo: M. Landvik
