pjullien Posted July 3, 2019 Share Posted July 3, 2019 I have found 2 invertebrate fossils that I haven't found before. They appear to be five-sided and one shows a star fish pattern on the top. The bottoms are curved and smooth. The dimensions are about 0.5 cm in diameter and 1 to 2 mm in thickness. Any help in identifying would be greatly appreciated as usual. (The rocks from the lake are from the Pennsylvanian period). Are they a type of echinoderm? The shape and characteristics of the underside seem a bit odd-could it be a central part of an echinoderm? Another question that comes to mind is why are they so similar yet one lacks the five radial lines visible on the other? 1 Link to comment Share on other sites More sharing options...
DPS Ammonite Posted July 3, 2019 Share Posted July 3, 2019 It is a plate from a crinoid. 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
ClearLake Posted July 3, 2019 Share Posted July 3, 2019 I agree, it is a plate from a crinoid. Look at Aaglaocrinus on Plate 7 in this article, it has similarities to yours. That might get you started on an ID. New Mexico Crinoids 2 Link to comment Share on other sites More sharing options...
pjullien Posted July 3, 2019 Author Share Posted July 3, 2019 Awesome! Nice to know that-and thanks for the lead! 1 Link to comment Share on other sites More sharing options...
dalmayshun Posted July 3, 2019 Share Posted July 3, 2019 Or perhaps from a blastoid? 1 Link to comment Share on other sites More sharing options...
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