Eospirifer eudora from the Osgood Shale

In my last post I displayed a Eospirifer eudora from Lockport, NY. Today I have two specimens that I found in the Waldron Osgood Shale near Napoleon, IN.

Specimen 1
Pedicle valve

Anterior

Brachial Valve

Posterior

Profile

Specimen 2
Pedicle valve

Anterior

Brachial valve

Posterior

Profile

Both specimens are larger than the one from Lockport, NY. The Waldron Osgood Shale is Silurian in age (Telychian to Sheinwoodian stage) and found in an area from Indiana down to Alabama. It is correlated to the Rochester Shale of New York and slightly younger than the Irondequoit limestone where the Lockport, NY specimen came from.

Thanks to Mike over at Louisville Fossils for the helpful Waldron Shale brachiopod guide. This guide is also useful to ID specimens from the Osgood Shale as they share some species.