Saturday, 13 July 2019


Pentremites sp. / Hardin County, Kentucky
This wee lovely Blastoid is Pentremites sp. from Mississippian deposits in Hardin County, Kentucky. This little fellow represents a specimen from the peak of their diversity in the Mississippian.

Blastoids are an extinct type of stemmed or stalked suspension feeding echinoderms, sometimes referred to as "sea buds."

They made a living feeding on planktonic organisms that inhabited our ancient seas from shelf to basin. Their lineage dates back to the Ordovician and died out at the end of the Permian, about 250 million years ago. This little guy measures 10mm top to bottom and 5mm at his widest.