Mochaccino Posted December 14, 2022 Share Posted December 14, 2022 Hello, Can someone help me identify these two Didymoceras pieces to the species-level? They are from Montana and both were repaired from a few fragments, though neither is said to be composite. From what I can tell they are in the 10-15cm range in terms of size. 1. This one seems to be part of the inner whorl, and based on how close the coil is I think D. cheyennense might be excluded, which leaves either D. stevensoni or D. nebrascense? Also in the 3rd photo there is a strange mismatch between the fragments...a poor fit or composite perhaps? 2. This looks like a section of the inner whorl lower closer to the living chamber. Any help would be appreciated, thanks! 2 Link to comment Share on other sites More sharing options...
jpc Posted December 14, 2022 Share Posted December 14, 2022 Nice pieces. Yup, Didymoceras, but I am not smart enough to tell you which species. As for the break (?) in the third photo. Tough to call, but I have seen some of these with natural micro-faults going through them just like this. 1 Link to comment Share on other sites More sharing options...
Mochaccino Posted December 15, 2022 Author Share Posted December 15, 2022 9 hours ago, jpc said: Nice pieces. Yup, Didymoceras, but I am not smart enough to tell you which species. As for the break (?) in the third photo. Tough to call, but I have seen some of these with natural micro-faults going through them just like this. True, actually now that I take a closer look, in the second photo this segment looks to be joined very unnaturally. The junction is very odd and the change in angle of coiling seems unnaturally abrupt. I suspect this piece does not quite fit here... Link to comment Share on other sites More sharing options...
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