Mcmaker Posted October 21, 2021 Share Posted October 21, 2021 Hi! I've recently acquired unidentified fossil. It's from triassic location in Silesia, Poland. Can you give me some ideas on ID? Link to comment Share on other sites More sharing options...
Agent_Zigzag Posted October 22, 2021 Share Posted October 22, 2021 Greetings! The resolution of the picture is not that satisifying......Based on what I can see, my best hypothesis would be this is a nice tarsal of a reptile, and since it's from Silesia, maybe it is one of the specimens could conclude to the new celophysoids (not named) found in the area. Link to comment Share on other sites More sharing options...
Rockwood Posted October 22, 2021 Share Posted October 22, 2021 It does look like a bone. There isn't much to go further on though. Link to comment Share on other sites More sharing options...
Mcmaker Posted October 22, 2021 Author Share Posted October 22, 2021 (edited) First, thanks for replies! I will update later the thread with more specific and detailed photos of this specimen Edited October 22, 2021 by Mcmaker Link to comment Share on other sites More sharing options...
Mcmaker Posted October 22, 2021 Author Share Posted October 22, 2021 That's everything i could squeeze out of my phone macro mode... Hope it'll help Link to comment Share on other sites More sharing options...
Mcmaker Posted October 22, 2021 Author Share Posted October 22, 2021 I undiscovered it a little, and it comes to an near sharp edge at one side. Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted October 23, 2021 Share Posted October 23, 2021 May be one of our forum members with experience with material from the European Triassic would have something to say about this... I'll tag @Pemphix and @sander... 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
Mcmaker Posted October 23, 2021 Author Share Posted October 23, 2021 Posting more photos Link to comment Share on other sites More sharing options...
Rockwood Posted October 24, 2021 Share Posted October 24, 2021 Can't hold it any longer. Am I the only one who is questioning if this is actually bone ? The texture isn't talking to me. I would call it . . . well not bone. Link to comment Share on other sites More sharing options...
sander Posted October 24, 2021 Share Posted October 24, 2021 It is difficult. the bone has been rolled and is incomplete. My best guess is that it is half of a gastral rib of a sauropterygian. (the V-shaped bone on "G" here: https://www.researchgate.net/figure/Specimens-of-Nothosaurus-bones-from-the-Sadowa-Gora-quarry-from-fieldwork-in-2012-14_fig2_273303740 ) Kind regards, Sander 1 2 Link to comment Share on other sites More sharing options...
Rockwood Posted October 24, 2021 Share Posted October 24, 2021 So is this the actual bone or a natural cast/replacement/partial replacement ? Link to comment Share on other sites More sharing options...
Mcmaker Posted October 24, 2021 Author Share Posted October 24, 2021 (edited) @Rockwood It's definitely a bone, i've got a sauropterygian vertebra from that location and it appearance, color and texture looks exactly the same as in this case Thanks for your shot, @sander i'm already in touch with the vertabrate paleontologist Dawid Surmik from the page you linked above Edited October 24, 2021 by Mcmaker Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted October 24, 2021 Share Posted October 24, 2021 (edited) Nice one, @sander! As I didn't really recognize the name of the site, I didn't quite realise this was a marine context. But I'd say your suggestion sounds pretty good, and I can totally see this being a partial sauropterygian gastralium. I actually have one from an Arnarosaurus from Rüdersdorf in Germany that I've included for comparison (though I don't have the actual specimen here with me right now). I also extracted the photograph of the particular specimen referred to above from figure 2 of Surmik, Skreczko and Wolny (2014) for more easy and permanent reference in the future. 6 hours ago, Rockwood said: So is this the actual bone or a natural cast/replacement/partial replacement ? And, yes, this is actual bone. These early sauropterygians have extremely pachyosteosclerotic bones that are so dense that you wouldn't be able to recognize any of the traditional give-aways of it being bone. Kind of like with dugong-bones from Florida... Edited October 24, 2021 by pachy-pleuro-whatnot-odon 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
Pemphix Posted October 30, 2021 Share Posted October 30, 2021 Sorry for not answering earlier, but i had a lot of job to do. To make it short: yes it is bone and i agree with sander that it might be a part of a -worn- sauropterygian gastralium. 1 Link to comment Share on other sites More sharing options...
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