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I found this partial curved cephalopod at the famous cephalopod beds (Maquoketa Fm, Upper Ordovician) at Graf, Iowa last year. It is the only non-Isorthoceras cephalopod I have found from here in my several trips. The only other cephalopod I have seen described from this site is Beloitoceras, but I don't believe that is what my specimen is. Has anyone come across anything similar? Thanks for your thoughts.
This gastropod was found in a block of matrix from Graf, Iowa that I split open last week. I have never bumped into this type of gastropod from there before. Research has left me stumped. Suggestions are welcomed! Elgin member, Lower Maquoketa formation, Ordovician. Thanks for the help Mike