| Xenocyathellus thedfordensis Arkona Shale Arkona, Ontario, Canada Size: The corals are 1.6, 1.2, 1.3, and 0.9 cm. Price: $10 US ID number: d1232 | 
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| Xenocyathellus thedfordensis Arkona Shale Arkona, Ontario, Canada Size: The corals are 1.6, 1.2, 1.3, and 0.9 cm. Price: $10 US ID number: d1232 |
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