henpecked Posted April 25, 2018 Share Posted April 25, 2018 Been lurking here on your forum for a long time. I really enjoy the pictures and stories. Back in 2013 I was exploring, fixing fence on a ranch in the Shirley Basin area of Wyoming. Not to far from the famous Como Bluffs. Found this in the creek. At one time I had contacted a gentleman (Neil Lander)? from the museum of natural science I believe was in New York. He gave me the name and the time it lived. My computer crashed and I lost it all. If one of you could help I would appreciate it. The large one with the spikes. About 13 inches across, spikes are 2 inches. Thanks Link to comment Share on other sites More sharing options...
Ludwigia Posted April 25, 2018 Share Posted April 25, 2018 Sorry, but that's not enough with just that one photo. Please show us others from various angles, also close-ups. Then I'm sure that someone familiar with Cretaceous ammonites will be able to identify it for you. You should get yourself a backup or print out important data. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Plax Posted April 25, 2018 Share Posted April 25, 2018 You might write Neil Landman at AMNH to see if he kept your correspondence. Link to comment Share on other sites More sharing options...
henpecked Posted April 25, 2018 Author Share Posted April 25, 2018 Thanks, Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 26, 2018 Share Posted April 26, 2018 It's very hard to tell. Plesiacanthoceras, perhaps? Which would be late Cretaceous. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
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