Acidaspis Trilobite Fossil Fragments

 

Trilobite fossils found near Maysville, Mason County, Kentucky USA dates to the Ordovician Period. Images were taken under microscope and field of view is 1.5 cm. They appear to be fragments of an Acidaspis (Murchison, 1839) trilobite.

Thanks to Kenny for the image.

Scaphopod, Ostracod and Gastropod Fossils

Above is a picture of  Dentalium scaphopod, ostracod and gastropod fossils. These animals existed in the Mississippian Period. They were found in the Blue River Group of the St. Louis layer of Harrison County, Indiana USA. Thanks to Kenny for the image.

Ordovician Cephalopod Fossil

Above is a picture of an unidentified cephalopod fossil. This animal existed in the Ordovician Period. It was found in the Clays Ferry Formation of Robertson County, Kentucky USA. Thanks to Kenny for the image.