Pleurocystites

phylum	Echinodermata	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 tiny, floating particles. For more information, visit the Wikipedia entry. Get back to Echinodermata
class	Cystoidea
order	Rhombifera
family	Pleurocystitidae
genus	Scotoplanes

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  Kaiyodo Dinotales 3 Pleurocystites