Slow Walker Posted January 26, 2023 Share Posted January 26, 2023 (edited) Found in Pierre shale in Sd. Might be from a concretion. the 2 parts are not from same creature it seems. Was also wondering what species it could be? Thanks Edited January 26, 2023 by Slow Walker 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted January 26, 2023 Share Posted January 26, 2023 Not sure there is enough left to make any kind of positive ID. @jpc @RJB ? 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
grandpa Posted January 26, 2023 Share Posted January 26, 2023 Yes ammonite. There's likely enough suture structure showing to make a positive ID, but I'm not resourced to do so. Comparing the suture structures of the two pieces should confirm (or not) if the two are of the same species. Link to comment Share on other sites More sharing options...
Slow Walker Posted January 26, 2023 Author Share Posted January 26, 2023 22 minutes ago, grandpa said: Yes ammonite. There's likely enough suture structure showing to make a positive ID, but I'm not resourced to do so. Comparing the suture structures of the two pieces should confirm (or not) if the two are of the same species. I meant that the 2 piece don't fit together. Id assume they are both same species. Link to comment Share on other sites More sharing options...
jpc Posted January 26, 2023 Share Posted January 26, 2023 can you show an end on view? It looks Placenticeras ish, but the end on view is needed to ID it to species. End on so we can see the cross section shape. 1 Link to comment Share on other sites More sharing options...
RJB Posted January 27, 2023 Share Posted January 27, 2023 I'm with JP on this one. Need to see the end view. Hopefully some keel showing. I would also agree and my best guess would be Placenticeras? RB Link to comment Share on other sites More sharing options...
Slow Walker Posted January 28, 2023 Author Share Posted January 28, 2023 On 1/26/2023 at 12:46 PM, jpc said: can you show an end on view? It looks Placenticeras ish, but the end on view is needed to ID it to species. End on so we can see the cross section shape. Okay Link to comment Share on other sites More sharing options...
jpc Posted January 28, 2023 Share Posted January 28, 2023 I can make sense of the penultimate photo... it seems to have a very rounded venter, making it not Placenticeras. The other pix are tough to read. Link to comment Share on other sites More sharing options...
caterpillar Posted January 28, 2023 Share Posted January 28, 2023 Maybe Pachydiscus 1 1 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Slow Walker Posted January 28, 2023 Author Share Posted January 28, 2023 9 hours ago, caterpillar said: Maybe Pachydiscus I looked at pics and looks like it could be that. Didn't see that type on the Pierre shale wiki. Link to comment Share on other sites More sharing options...
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