Clanjones Posted July 30, 2014 Share Posted July 30, 2014 It looks trilobite-y to me. Found in Decorah Shale. Ordovician period. Link to comment Share on other sites More sharing options...
piranha Posted July 30, 2014 Share Posted July 30, 2014 It's a partial glabella and right cheek of a cheirurid trilobite. The occipital ring looks like a good match with Ceraurus plattinensis. Link to comment Share on other sites More sharing options...
piranha Posted July 31, 2014 Share Posted July 31, 2014 One more item I just noticed. This is the hypostome of an Isotelus. Congrats on an interesting association of trilobites! Link to comment Share on other sites More sharing options...
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