| Flexicalymene retrorsa Arnheim Formation Mt. Orab, Ohio Size: 3.0 cm across The trilobite is mounted onto the matrix. Price: $20 US ID number: f1664 | 
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| Flexicalymene retrorsa Arnheim Formation Mt. Orab, Ohio Size: 3.0 cm across The trilobite is mounted onto the matrix. Price: $20 US ID number: f1664 |
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