| Eutrephoceras dekayi Pierre Shale Wasta, South Dakota Size: The cephalopod is about 6 x 6.7 cm. Price: $100 US ID number: f1825 | 
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| Eutrephoceras dekayi Pierre Shale Wasta, South Dakota Size: The cephalopod is about 6 x 6.7 cm. Price: $100 US ID number: f1825 |
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