ThePrehistoricMaster Posted July 31, 2018 Share Posted July 31, 2018 I have four ammonites that I cannot identify, and I hope you guys can help I got no information on their age or where they were found. Link to comment Share on other sites More sharing options...
ThePrehistoricMaster Posted July 31, 2018 Author Share Posted July 31, 2018 1. Link to comment Share on other sites More sharing options...
ThePrehistoricMaster Posted July 31, 2018 Author Share Posted July 31, 2018 2. Link to comment Share on other sites More sharing options...
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The Amateur Paleontologist Posted July 31, 2018 Share Posted July 31, 2018 The 1st one is a perisphinctid (probably Perisphinctes sp.); I'm thinking from the Late Jurassic of Madagascar. 4th one reminds me of those late Cretaceous Pierre Shale scaphitid ammonites. Hope that helps! Opalised fossils are the best: a wonderful mix between paleontology and mineralogy! Q. Where do dinosaurs study? A. At Khaan Academy!... My ResearchGate profile Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 31, 2018 Share Posted July 31, 2018 One and two look like Perisphinctes from Madagascar. 3 and 4 I don't know. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
-AnThOnY- Posted July 31, 2018 Share Posted July 31, 2018 4 looks to be Sphenodiscus, from the Pierre Shale 3 Link to comment Share on other sites More sharing options...
The Amateur Paleontologist Posted July 31, 2018 Share Posted July 31, 2018 @-AnThOnY- yeah - it's most likely Sphenodiscus... guess I was right on stratigraphy/location but not taxonomy, huh? Opalised fossils are the best: a wonderful mix between paleontology and mineralogy! Q. Where do dinosaurs study? A. At Khaan Academy!... My ResearchGate profile Link to comment Share on other sites More sharing options...
ThePrehistoricMaster Posted July 31, 2018 Author Share Posted July 31, 2018 5 hours ago, The Amateur Paleontologist said: The 1st one is a perisphinctid (probably Perisphinctes sp.); I'm thinking from the Late Jurassic of Madagascar. 4th one reminds me of those late Cretaceous Pierre Shale scaphitid ammonites. Hope that helps! 4 hours ago, Tidgy's Dad said: One and two look like Perisphinctes from Madagascar. 3 and 4 I don't know. 4 hours ago, -AnThOnY- said: 4 looks to be Sphenodiscus, from the Pierre Shale Thank you for the help! Link to comment Share on other sites More sharing options...
Ludwigia Posted July 31, 2018 Share Posted July 31, 2018 I'd say that the first 2 are Perisphinctidae from Madagascar and the last one could be Coilopoceras springeri from the New Mexican Late Cretaceous. Can't determine the 3rd one without views of venter and mouth aperture. 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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