Rare Russian Trilobite Ptychopyge rossica

Description: A well-inflated example of a rare Asaphid, this is Ptychopyge rossica. The golden Calcite exoskeleton is complemented by the white limestone matrix, with the trilobite shown in a prone position. This is one of the older members of the genus, and the first I have seen in five years. Once called Ptychopyge angustifrons, it is more recently known as P. rossica, with the specific name derived from its home country Russia. Notice the fine terrace lines on the pygidium.

Also see: Russian Trilobites