| Astroporites ottawaensis Tegmen Bobcaygeon Formation Brechin, Ontario, Canada This fossils was described as a bryozoan in the 1800's. It is currently being redescribed as an echinoderm and more specificially as the tegmen of a Cleiocrinus. It is one of the rarest of fossils from this formation. Size: 4.5 cm diameter | 
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