- Ceratiocaris sp.
- Silurian Age
- Williamsville Formation
- Near Buffalo, New York
- Overall size of the plate measures approx. 5″ x 6″ and the carapace measures approx. 2.5″ long. There is a very small section by the telson that cracked when the plate was split.. it has been repaired
- This specimen is one half of a part and counter-part found. (This is the NEGATIVE half) The other POSITIVE side is also for sale on my site.
Ceratiocaris is a genus of paleozoic phyllocarid crustaceans. They are typified by eight short thoracic segments, seven longer abdominal somites and an elongated pretelson somite. Their carapace is slightly oval shaped; they have many ridges parallel to the ventral margin and possess a horn at the anterior end. They are well known from the Silurian Eramosa formation of Ontario, Canada. Phyllocarids are one of the lesser known branchiopod crustaceans with a hard Phyllocarid arthropodshell. They have a fairly large carapace, which protects the anterior part of the body. This structure hinged along the dorsal edge like a bivalve. Usually only the carapace is found. Rarely are the soft parts preserved.