Rare 2.3" Ptychopyge Trilobite - Putilovo Quarry, Russia

This is a 3" long example of a rare Ordovician trilobite (Ptychopyge rossica) from the Putilovo Quarry in the St. Petersburg region of Russia. I've only been able to get a few examples to this species of over the years. It is laid out nice and prone with only some minimal shell restoration.