Description

Late Mississippian

Elwren Formation

Grayson CO., KY, USA

Very rare 16mm blastoid WITH COLOR PATTERN PRESERVED!

Blastoid.

Pentremites is a genus of blastoid that lived across the Mississippian and Pennsylvanian Periods.  It is known from various parts of North America from northern Canada to Arizona and east to Virginia

Blastoids are an extinct group of echinoderms that appeared during the Ordovician and survived to the end of the Permian.  Like crinoids their plated bodies were connected to the seafloor by a holdfast, which is like an anchior, and a long column.

This one still retains its color pattern.