minnbuckeye Posted July 21, 2022 Share Posted July 21, 2022 This was discovered yesterday on an excursion into Iowa's Ordovician Decorah Shale. Initially I thought a star shaped crinoid columnal but on close examination, no lumen can be seen. The specimen is about 5 mm in diameter. @crinus Link to post Share on other sites
Fossildude19 Posted July 21, 2022 Share Posted July 21, 2022 Crinoid calyx plate? 3 Link to post Share on other sites
Northern Sharks Posted July 21, 2022 Share Posted July 21, 2022 1 minute ago, Fossildude19 said: Crinoid calyx plate? That would be my guess as well, something along the lines of Carabocrinus. 1 1 1 Link to post Share on other sites
Tidgy's Dad Posted July 21, 2022 Share Posted July 21, 2022 Yes, I agree with a calyx plate from a stalked echinoderm. 1 Link to post Share on other sites
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