South Dakota Cephalopod

Some of the suture pattern on a cephalopod fossil fragment still visible.  Creature lived in the Cretaceous Period and was found in South Dakota.  Fossil obtained from the Indiana Society of Paleontology at GeoFest 2010 (Indiana State Museum).

Fossil about 5 cm in length.

Platystrophia ponderosa

Platystrophia ponderosa brachiopod found in the McMillan Formation of Spencer County, Kentucky.  Animals existed in the Ordovician Period.

Whitfieldella Brachiopod with Texture

 

This brachiopod is a fresh extraction from the Waldron Shale after over 400,000,000 years of entombment.  An intriguing fossil because it has part of its shell still left but it such a thin layer that one can see the inside texture.  The fossil measures at 2.5 cm length, 2.2 cm width, 1.5 cm height and 10.7 g weight.

Creature existed in the Middle Silurian Period and was found in Clark County, Indiana.  It appears to be of the genus Whitfieldella.