Massie Shale Calymene
I have previously written about the rare trilobite Spathacalymene on this blog site. It is found in the Silurian Massie (formerly Osgood) Shale of Southeast Indiana. Yet an even rarer trilobite from that formation is Calymene. I’ll describe one of them here. In my experience, most of the trilobites found in the Massie are ventrally exposed. But the