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Unknown shape in chert, possibly Ceraurinus


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Here's something I found a few months ago. There are lots of bits of brachiopods which seem to have been preserved in their original perfect shape instead of the casts I usually find. It's what's on top of them that interests me. It looks like it could be a trilobite cephalon, if that's the case then the closest match I could find was Ceraurinus sp. I'm pretty sure I saw something to do with a crinoid that looked similar though I haven't been able to find it again. Any other ideas?






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Cheirurid trilobite glabella.

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By the way, that is limestone, not chert.

Cropped, enlarged and contrasted:



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