| Favosities sp. Widder Formation, Hungry Hollow Member Arkona, Ontario, Canada With the coral Aulopora microbuccinata encrusting the specimen. Size: 4.5 cm across | 
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| Favosities sp. Widder Formation, Hungry Hollow Member Arkona, Ontario, Canada With the coral Aulopora microbuccinata encrusting the specimen. Size: 4.5 cm across |
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