rawfossils Posted December 22, 2022 Share Posted December 22, 2022 From the Rocky Ridge Sandstone unit of the Pierre Formation near Fort Collins, Colorado Link to comment Share on other sites More sharing options...
Crusty_Crab Posted December 23, 2022 Share Posted December 23, 2022 I am not familiar with that species, but it is very consistent with the genus Anchura that I have encountered. For reference, this is a representative from the Cretaceous of California, Anchura (Helicaulax) tricosa Saul and Popenoe, 1992: Link to comment Share on other sites More sharing options...
rawfossils Posted December 24, 2022 Author Share Posted December 24, 2022 On 12/23/2022 at 11:26 AM, Crusty_Crab said: I am not familiar with that species, but it is very consistent with the genus Anchura that I have encountered. For reference, this is a representative from the Cretaceous of California, Anchura (Helicaulax) tricosa Saul and Popenoe, 1992: Thank you that is definitely it. You have a very well preserved arm on that one but it looks like the same thing as this one. Link to comment Share on other sites More sharing options...
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