dakotafossilhound Posted July 6, 2014 Share Posted July 6, 2014 From central South Dakota, near the Missouri River. I'll try to get better images if necessary. Thanks! Link to comment Share on other sites More sharing options...
Auspex Posted July 6, 2014 Share Posted July 6, 2014 It looks like a scaphite, but I know not which one. 1 "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
dakotafossilhound Posted July 6, 2014 Author Share Posted July 6, 2014 Thanks for giving some direction.....could it be hoploscaphite comprimus ?? I see one on ebay that looks very similar http://www.ebay.com/itm/Cretaceous-Scaphite-Ammonite-Ammolite-S-Dakota-Fossil-/400156397417 Link to comment Share on other sites More sharing options...
BobWill Posted July 6, 2014 Share Posted July 6, 2014 (edited) Welcome to the forum. Yes I think that's your fossil. It would help with a better ID if we knew the formation or age of the rock where it was found. Also an end view might help and something for scale. Here is a much older cephalopod but a nautiloid instead of an ammonoid, with similar ribs but less distinct tubercles around the outer edge called Domatoceras. Edited July 6, 2014 by BobWill Link to comment Share on other sites More sharing options...
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