35 million-year-old solid-wood-borer beetle larvae support the idea of stressed Eocene amber forests

Abstract Eocene amber is an important window into the past about 35 million years ago. The large quantities of resin produced by this forest past, resulting in amber, triggered idea a under stress. Recent findings higher abundances hoverfly larvae modern fauna often associated with wood-borer larvae, provided hint that may have contributed to Yet, so far only few such been reported. We compiled dozen additional including giant one at least mm length Rovno amber. Heavily damaged fossils furthermore indicate larger type were prone oxidation and that, some, enigmatic tube-like tunnels pieces represent remains larvae. This find strongly indicates not rare, but common forest, which compatible high further supports Whether possible cause stress or symptom already stressed unclear.