.85" Blastoid (Troosticrinus) Fossil - Tennessee

This is a Silurian age blastoid fossil of the species Troosticrinus reinwardti from the Brownsport Formation of Decatur County, Tennessee.

Blastoids are an extinct type of filter feeding, stemmed echinoderm that resembles a small hickory nut. They thrived during the Mississippian period before going extinct during the great Permian extinction. While not as diverse as their crinoid relatives, they were equally as common in rocks around the world. Blastoids were protected by a set of interlocking plates that formed the main body, or theca. In life, a typical blastoid's theca was attached to a stalk or column made up of stacked disc-shaped plates.
SOLD
DETAILS
SPECIES
Troosticrinus reinwardti
LOCATION
Decatur County, Tennessee
FORMATION
Brownsport Formation
SIZE
.85" blastoid
CATEGORY
SUB CATEGORY
ITEM
#135591
GUARANTEE
We guarantee the authenticity of all of our
specimens. Read more about our
Authenticity Guarantee.