Fissiletag Posted December 29, 2023 Share Posted December 29, 2023 I recently bought a bunch of trilobites from an old collection. The seller didn't have much information on the trilobites besides them originating somewhere in the midwest. (He bought the fossils as part of a collection). I'm wondering if anyone recognized the possible formation they could have originated from and the IDs of the trilobites? Here are the photos: 2 Link to comment Share on other sites More sharing options...
connorp Posted December 29, 2023 Share Posted December 29, 2023 Definitely middle/upper Ordovician. Could have come from a lot of places though. If these were all collected from the same formation, the Maquoketa Formation would be a reasonable guess. But even then, could have come from MO, IA, MN, etc. 1 Link to comment Share on other sites More sharing options...
Collector9658 Posted December 29, 2023 Share Posted December 29, 2023 I agree they look like Ordovician. Photos 3 and 5 looks like Bumastoides. Photo 8 looks like a Calymenid. The rest look like some sort of Illaenus. 1 1 Link to comment Share on other sites More sharing options...
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