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Hardly anybody ever talks about the Cambrian fossils of the southern midcontinent (USA). They're super-underappreciated. Show us what you've got!

Here's one to start us off: Thorax and pygidium of a trilobite, possibly Orygmaspis, typically referred to as "Orygmaspis cf. Orygmaspis llanoensis" but probably a different species altogether. Note the two pairs of macropleural spines marking the final thoracic segments. Davis Formation (late Cambrian: Furongian), south side of Highway 8, St. François County, Missouri.

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Diplocaulus

I sadly do not have any Southern fossils, but I'm excited to see how this thread develops!:)

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Here are some more specimens from the late Cambrian (Furongian) Davis Formation of St. François County, Missouri, USA. These were found and prepped by @California Dave.

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One more, this one a ventral view of an Orygmaspis thoracopygon from the Davis Formation (Furongian, Missouri, USA). Note mostly buried pleural spines with tips barely emerging from sediment. 

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Found two weeks ago by Cam: this cranidium+thorax of what appears to be Orygmaspis sp. based on the faintly visible macropleural spines. Davis Formation, Late Cambrian (Furongian), St. François County, Missouri, USA. 

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Ironhead42

I have barely begun fossil hunting in Oklahoma even though I live here. I have made two trips to Texas so far to collect though. Some nice specimens you have. I am looking forward to seeing what else others post that I might find here in Oklahoma.

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Ironhead, it's quite a state for fossils! The Ordovician (most south-central OK) is outstanding for trilobites and echinoderms, and of course the Devonian trilobites (SE OK) are world-class. The Pennsylvanian and Permian (eastern and central OK) are quite nice as well, though I haven't really spent time in them. Good Cretaceous too (southern OK)! As for the Cambrian and Mississippian, I know there are decent trilobites in both, despite the limited outcrop area. I look forward to seeing your future posts about OK finds.

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Posted (edited)

Just saw that @Raistlin has posted a nice example of a southern midcontinent Cambrian trilobite here:

 

 

Edited by pefty
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