This exceptionally detailed cystoid from the famous Silurian Rochester Shale beds of Caleb’s Quarry in Middleport New York.
This cystoid is on a massive shale block measuring 8 3/4 inches by 5 1/2 inches and over 1 inch thick to add to the stability of this magnificent echinoderm. The .88 x .79 inch theca shows exceptional detail and the plates are highly intricate. Also exhibiting 7 brachials or arms with fine detail, down to many of the pinnules. The largest brachial is 2 3/4 inches long. The stem is 3 1/2 inches long. The cystoid is Still attached to a small bryozoan colony.
This cystoid was killed and buried by a storm hence the brachials pointing in the same direction and the broken bryozoan colony. The shale is a very fine grained shale showing the slurry that washed over the cystoid was comprised of small particles of sand, silt and clay.
It was expertly and meticulously prepared using micro air abrasive technology.
A must have for any collector of Rochester Shale fossils.
This is the specimen you will receive.
Middleport, New York