Rare 2.3" Ptychopyge Trilobite - Putilovo Quarry, Russia

This is a superb example of a rare Ordovician trilobite from the Putilovo Quarry. It's a 2.3" long Ptychopyge rossica, with exceptional shell preservation. It's perfectly prone and displays nicely on a 5x4.9" piece of limestone. This specimen was part of a high end collection of rare trilobites I recently acquired. Shell restoration is pretty minimal on this specimen.