Pair of Large Cystoids (Holocystites) - Indiana

 
 
Here is a pair of nicely prepared of the Silurian aged cystoids, Holocystites. They come from the Osgood Shale in Indiana. Cystoid are an extinct echinoderm (same Phylum as starfish, urchins, etc) that attached themselves to the see floor by stalks.

Each specimen was microscopically cleaned using air abrasives and they've been mounted on a piece of shale from the same location for display purposes.
DETAILS
SPECIES
Holocystites sp.
LOCATION
Napolean, Indiana
FORMATION
Osgood Shale
SIZE
Each 1.8" long
CATEGORY
SUB CATEGORY
ITEM
#40682
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