| Eutrephoceras dekayi Pierre Shale Wasta, South Dakota Size: The cephalopod is about 7 x 7.5 cm. Price: $150 US ID number: f1843 | 
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| Eutrephoceras dekayi Pierre Shale Wasta, South Dakota Size: The cephalopod is about 7 x 7.5 cm. Price: $150 US ID number: f1843 |
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