Northern Sharks 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: http://www.thefossilforum.com/index.php/topic/21309-ontario-ordovician-whatzit/page__p__237731__hl__+undescribed%20+verulam__fromsearch__1#entry237731 Link to comment
Herb Posted March 21, 2012 After looking at the other pix, I agree with Archimedes on the Petrocrania ID, well done! Link to comment
Herb Posted March 21, 2012 p.s. I have seen a lot of Petrocrania, but I have never seen a shell completely covered by them, cool. Link to comment
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