While I have many sources of limestone locally, this specimen of Fenestella was one of my first finds in a new source. Just across the valley floor to the other side, a ridge of limestone cropped out just above the stream. While I’ve likely encountered many bryozoans in limestone, this is the first whole specimen that I found to be worth exploring.

A non-coral Lace Coral

With a common name of lace coral, it is coral-like, but truly a Bryozoan. Species from the Phylum, Bryozoa, typically form colonies of cloned creatures called zooids. These are on average 1/2 a millimeter in length and filter feed from the ocean water. Each little opening in the fossil, the entrance to a zooecium, is the home for each zooid.

CG-0011, Fenestella
CG-0011, Fenestella. Specimen with metric scale.

More about Fenestella Online