Sagebrush Steve Posted March 15, 2020 Share Posted March 15, 2020 I was in Moab, Utah last week and stopped in at the Moab Rock Shop. They had lots of fossils so I picked up this nice little ammonite about 17 mm diameter for a few dollars. It was labeled as an Orthosphinctes from the Jurassic of the Atlas Mountains of Morocco, but I'm not convinced. I can't find much online about Orthosphinctes but what I do find shows the whorl cross section as being much more oval in shape. I found the thread below from 2014 but it doesn't seem to have answered the poster's original question of Orthosphinctes vs. Perisphinctes. Can anyone help? Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted March 15, 2020 Share Posted March 15, 2020 Hi, Steve! I don't know the difference between the two, but I cannot recall seeing anything listed as being Orthosphinctes from Morocco. And this specimen doesn't seem to be any Moroccan preservation or shape that I can recall. This looks Madagascan to me. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Sagebrush Steve Posted March 15, 2020 Author Share Posted March 15, 2020 8 minutes ago, Tidgy's Dad said: Hi, Steve! I don't know the difference between the two, but I cannot recall seeing anything listed as being Orthosphinctes from Morocco. And this specimen doesn't doesn't seem to be any Moroccan preservation or shape that I can recall. This looks Madagascan to me. That may be why I can’t find anything about Orthosphinctes in Morocco on google. I’m sure the rock shop bought their stuff at the Tucson fossil show, so the IDs might not be accurate. Link to comment Share on other sites More sharing options...
Wrangellian Posted March 15, 2020 Share Posted March 15, 2020 I can't help with the identity but it looks Madagascan to me too. I wonder how many fossils are floating around out there with location stated as 'Morocco' when 'Madagascar' was intended, or vice versa. 1 Link to comment Share on other sites More sharing options...
Ludwigia Posted March 15, 2020 Share Posted March 15, 2020 @Sagebrush Steve Check out Dichotomosphinctes from the Madagascarian Oxfordian. That's a Perisphinctes subgenus....Actually Properisphinctes bernensis would be an even better guess. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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