andoran Posted January 3, 2022 Share Posted January 3, 2022 I found this in with a bunch of Petoskey Stones from the Alpena area, but I'm not quite sure it is one too. It seems like the calyxes are further apart than they are in Hexagonaria. Does anyone have an idea what this is? I'll go ahead and tag @TqB myself. Thank you for the help. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted January 4, 2022 Share Posted January 4, 2022 Hexagonaria percarinatum is the species known as Petsoskey stones, but several other species of the genus occur in Michigan, I think. Any differences in the calices may be explained away by that or differences in growth, perhaps. 2 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
andoran Posted January 4, 2022 Author Share Posted January 4, 2022 I took a look at it under a cheap microscope and based on the features I can actually see, it could be H. anna or H. potterensis. I'm leaning more towards H. potterensis. These are based on the numbers out of: STUMM, E. C., 1970, Corals of the Traverse Group of Michigan Part 13, Hexagonaria: Contr. Mus. Paleontology, Univ. Michigan, v. 23, no. 5, p. 79-91. 1 Link to comment Share on other sites More sharing options...
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