Pleurocystites

Pleurocystites Temporal range: Late Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
Pleurocystites squamosus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	†Rhombifera
Order:	†Dichoporita
Family:	†Pleurocystitidae
Genus:	†Pleurocystites

Pleurocystites (meaning rib bag or side bladder) is a genus of rhombiferan echinoderm (a cystoid) that lived in the Late Ordovician. Its fossils are known from Europe and North America. Pleurocystites grew to a height of 2 centimeters (3/4 of an inch) and fed on plankton.

• Fossils (Smithsonian Handbooks) by David Ward (Page 191)
• Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 75

• Pleurocystites in the Paleobiology Database