Extremely Rare Bathyurellus teretus Ordovician Trilobite

This is a rare opportunity to obtain an extremely rare trilobite and an early Proetida, the last trilobite order to survive until the Permian extinction. My research indicates that only one has previously been available for purchase, and that this is the best of the three specimens ever found. The left cheek is restored. There is also an enrolled Ptyocephalus yersini in association.