Although at a first glimpse one might think differently, this creature is an insect. The tubular structure is not a bone structure, but parts of the athropod legs. Based on its size, it is evident that this animal lived in the carbon age, about 340 million years ago, when insects grew to gigantic sizes due to the high oxygen level of the atmosphere.
Its habits make it similar to the common earwig: during the day it was hiding in cavities or under pieces of wood, and it was active and looking for food at night. There is
another feature which makes one associate it with these insects: the long, bended fork-like extension of its body which might have been used for mating, or to scare away rivals.