Wrangellian Posted December 15, 2010 Share Posted December 15, 2010 Anyone recognize this? It's another tagless item I acquired, I guess it's Eutrephoceras sp. but not sure where it's from. I think I have seen similar ones online from Montana and elsewhere, but nothing to make me sure. Species, location, age/formation? Thanks Link to comment Share on other sites More sharing options...
Terry Dactyll Posted December 15, 2010 Share Posted December 15, 2010 Wrangellian.... Cant help with the locality other than I have one very similar from the Fox Hills formation, Montana in the USA ammonites thread... but its a very nice specimen.... How did you get on with the suture diagrams for the ammonite.... any luck with the ID?... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
FossilDAWG Posted December 15, 2010 Share Posted December 15, 2010 Looks like a good old Fox Hills formation Eutrephoceras dekayi to me. Impossible to be sure of a specific locality, of course. Where was the post about the ammonite suture? I missed that one. Don Link to comment Share on other sites More sharing options...
Wrangellian Posted December 16, 2010 Author Share Posted December 16, 2010 Looks like a good old Fox Hills formation Eutrephoceras dekayi to me. Impossible to be sure of a specific locality, of course. Where was the post about the ammonite suture? I missed that one. Don That was another question I posted "Ammonite - France?" for another item I had not tag to. What age is the Fox Hills Fm? Link to comment Share on other sites More sharing options...
Wrangellian Posted December 16, 2010 Author Share Posted December 16, 2010 Wrangellian.... Cant help with the locality other than I have one very similar from the Fox Hills formation, Montana in the USA ammonites thread... but its a very nice specimen.... How did you get on with the suture diagrams for the ammonite.... any luck with the ID?... I still can't decide but I'm leaning now toward your ID of Harpoceras (falcifer). But some of those profile drawings didnt have sutures with them and I dont trust my own eye with them anyway (interpretation). I'd love to have someone who knows these things look at it in person. Link to comment Share on other sites More sharing options...
Terry Dactyll Posted December 16, 2010 Share Posted December 16, 2010 I still can't decide but I'm leaning now toward your ID of Harpoceras (falcifer). But some of those profile drawings didnt have sutures with them and I dont trust my own eye with them anyway (interpretation). I'd love to have someone who knows these things look at it in person. possibly at the time of writing the book the author didnt have access to those missing suture patterns to include... Im convinced myself its a Harpo of some description... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
FossilDAWG Posted December 16, 2010 Share Posted December 16, 2010 The Fox Hills formation is late Cretaceous, Maestrichtian stage. I hope no-one is going to go and re-name all those Cretaceous stages too. Don Link to comment Share on other sites More sharing options...
Wrangellian Posted December 17, 2010 Author Share Posted December 17, 2010 The Fox Hills formation is late Cretaceous, Maestrichtian stage. I hope no-one is going to go and re-name all those Cretaceous stages too. Don (Thanks) I doubt that, the Cretaceous stages are all pretty entrenched, no? Link to comment Share on other sites More sharing options...
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