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Posted March 18, 2012
Very nice carpoid.
Sorry, my bad, very nice cystoid
Posted March 19, 2012
Thanks. I haven't had too many votes for cystoid for this mystery piece. There are a couple of other views of it here:
Posted March 21, 2012
After looking at the other pix, I agree with Archimedes on the Petrocrania ID, well done!
p.s. I have seen a lot of Petrocrania, but I have never seen a shell completely covered by them, cool.