Two Miocene Fossil Crabs (Styrioplax?) - Pohorje, Slovenia

This is a pair of fossil crabs (Styrioplax exiguous?) from Pohorje, Slovenia. This piece came out of an old collection and the ID/location is based on the tag provided though we have not been able to locate any information allowing us to independently verify it.

The larger of the two crabs is 3.9" across and they are both preserved ventrally on a 7.1 x 4.1" piece of limestone. There are a couple of repaired cracks running through the piece with a small amount of restoration along the repaired cracks.