Found on the moorland between Widdop and Upper Gorple Reservoirs earlier this spring (14th April).
It was lying on the surface. 
I have seen similar things before, including some weathering out of a high peat bank, their position low down in the peat suggesting they were from a very long time ago. Couldn’t find these the next time as I was at the same place (other side of Widdop Res. on top of the ridge.) Maybe evidence of prehistoric moths?