Screen 1: Pseudorthoceratoidea
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| Dolorthoceras sociale (100 mm), colno 40123 Upper Ordovician, Maguoketa Shale, Elgia Member |
| Back to general survey collections |
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| Dolorthoceras sociale (100 mm), colno 40123 Upper Ordovician, Maguoketa Shale, Elgia Member |
| Back to general survey collections |