Possible Fish Scale Fossil - Devonian Period

Pictured in this posting is a mystery fossil found in the New Albany Shale (Late Devonian Period). It was uncovered by splitting a nodule of shale. Size of fossil is  about 4 mm wide. Specimen was collected in Floyd County, Indiana, USA. It might be some sort of fish scale. I need to get some better microscope pictures of this fossil. The specimen somewhat resembles a Rhabdoderma scale (see the discussion at this link Mazon Creek Coelacanth scale).

Ordovician Tentaculities Fossil

Tentaculites (von Schlotheim, 1820) fossil that is of an uncertain affinity. Image taken under microscope and field of view is 3 mm. Found near Brookville Lake, Indiana and Waynesville Formation dates to the Ordovician Period.

Thanks to Kenny for the image. 

Unidentified Conodont Fossils

Conodont fossils found near Brookville Lake, Franklin County, Indiana USA and Waynesville Formation dates to the Ordovician Period. Images have a field of view is 1 mm.

Thanks to Kenny for the images