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KGS Home > Fossils > Invertebrate Fossils > Echinodermata
Blastoidea (extinct)

Closely related to the crinoids, but without long arms on their body, the extinct blastoids were fairly abundant during the Devonian and Mississippian in Kentucky. The hickory-nut-shaped body of the Pentremites is the most common blastoid fossil in the State.

The Mississippian blastoid Pentremites

Typical blastoid fossils from Kentucky