howard_l Posted January 12, 2016 Share Posted January 12, 2016 I got this cephalopod from an auction at my local club. There was no information with it. I am pretty sure it didn't come from Kentucky but I do believe it is Ordovician in age by the look and preservation. I have tentatively identified it as Diestoceras from the Middle to Upper Ordovician from North America (Indiana). Or Dowlingoceras from the Upper Ordovician of North America. The living chamber is at the bottom and is mostly absent, the brevicone tapers rapidly but the end is missing. Has anyone seen anything like this before especially in the northern part of the US. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
michele 1937 Posted January 13, 2016 Share Posted January 13, 2016 I got this cephalopod from an auction at my local club. There was no information with it. I am pretty sure it didn't come from Kentucky but I do believe it is Ordovician in age by the look and preservation. I have tentatively identified it as Diestoceras from the Middle to Upper Ordovician from North America (Indiana). Or Dowlingoceras from the Upper Ordovician of North America. The living chamber is at the bottom and is mostly absent, the brevicone tapers rapidly but the end is missing. Has anyone seen anything like this before especially in the northern part of the US. Mychelinoceras ? Link to comment Share on other sites More sharing options...
FossilDAWG Posted January 13, 2016 Share Posted January 13, 2016 It reminds me of Westonoceras. Caleb once posted a photo of a similar specimen (here, post 42) from the Galena Formation. Michelinoceras (if that is what Michele meant by Mychelinoceras) is a classic orthocone, a smoothly tapered cone without any swelling, or contraction of the living chamber. It is quite different from the specimen in question. Don Caleb's Westonoceras: Link to comment Share on other sites More sharing options...
rwise Posted January 13, 2016 Share Posted January 13, 2016 Looks a lot like specimens we find here in Texas at Jacksboro, which is Pennsylvanian, Finis Shale Formation. Here's a picture of one... notice the center... Yours looks a little more "squashed" but they have same growth lines and center..... Thanks for your help in advance. Link to comment Share on other sites More sharing options...
fossilized6s Posted January 13, 2016 Share Posted January 13, 2016 I agree with Don. I have found similar pieces. ~Charlie~ "There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK ->Get your Mosasaur print ->How to spot a fake Trilobite ->How to identify a CONCRETION from a DINOSAUR EGG Link to comment Share on other sites More sharing options...
howard_l Posted January 13, 2016 Author Share Posted January 13, 2016 I have a number of specimens of Westonoceras from Minnesota and it does resemble it. I have no doubt they are related but I have never seen a very large specimen. This specimen is 10 times larger than any Westonoceras I have seen. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now