Archimedes swallovanus bryozoan found in Calbert County, Alabama.  Creatures existed in the upper Mississippian Period. Thanks to Dave...

The gastropod Michela trabeatoides lived in the Eocene.  Specimen found in the Stone City Formation (aka Whiskey Bridge) of Brazos Rive...

Ootoliths (aka fish ears) fossils found in the Stone City Formation (Whiskey Bridge) of Brazos River, Texas.  Fish swam around in the Eo...