| Protoleptostrophia perplana Petrocrania hamiltoniae Silica Shale Sylvania, Ohio Size: The brachiopod is about 4 cm. across Even though it is extremely thin, both valves are present. This is how it is always found. Price: $10 US ID number: f1608 | 
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| Protoleptostrophia perplana Petrocrania hamiltoniae Silica Shale Sylvania, Ohio Size: The brachiopod is about 4 cm. across Even though it is extremely thin, both valves are present. This is how it is always found. Price: $10 US ID number: f1608 |
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