| Megastrophia concava Silica Formation Paulding, Ohio A very nice specimen with two inarticulate brachiopods attached to it. The inarticulate brachiopods are Petrocrania hamiltoniae. Size: 5.3 cm across | 
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| Megastrophia concava Silica Formation Paulding, Ohio A very nice specimen with two inarticulate brachiopods attached to it. The inarticulate brachiopods are Petrocrania hamiltoniae. Size: 5.3 cm across |
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