Ossicle Posted October 12, 2019 Share Posted October 12, 2019 This is from the Oxford Clay, Peterborough Member so Callovian, Middle Jurassic. I'm not sure what it is, it's very small and I took the pictures with a digital camera - the scale is in mm. Other fauna found with it included ammonites, crinoids, belemnites and gryphia. Any suggestions appreciated. Other things I've found of a similar size and shape there are echinoid spines and some kind of burrow cast, but this is very different. I was wondering if it might be a different part of a crinoid than I'm used to finding? Link to comment Share on other sites More sharing options...
TqB Posted October 12, 2019 Share Posted October 12, 2019 Based on the plate pattern especially in the first photo, it looks like an ophiuroid arm. From Martill & Hudson 1991, Fossils of the Oxford Clay. 7 Tarquin Link to comment Share on other sites More sharing options...
Rockwood Posted October 12, 2019 Share Posted October 12, 2019 Gut reaction . . . Beat me to the finish. 2 Link to comment Share on other sites More sharing options...
Ossicle Posted October 12, 2019 Author Share Posted October 12, 2019 That would be awesome! I was thinking echinoderm, but not that. Thank you, that means I found something completely new for me. Link to comment Share on other sites More sharing options...
TqB Posted October 12, 2019 Share Posted October 12, 2019 8 minutes ago, Ossicle said: That would be awesome! I was thinking echinoderm, but not that. Thank you, that means I found something completely new for me. They're pretty rare - the book I referenced implies that they're only reasonably common as bits from Weymouth, very patchy elsewhere. Yaxley doesn't get a mention. 1 Tarquin Link to comment Share on other sites More sharing options...
Ossicle Posted October 12, 2019 Author Share Posted October 12, 2019 I am now reading up on them, and have found this paper: https://www.cambridge.org/core/journals/journal-of-paleontology/article/brittle-stars-from-the-british-oxford-clay-unexpected-ophiuroid-diversity-on-jurassic-sublittoral-mud-bottoms/8B34E184DFCF1CEEE275194CE2498B17 I love echinoderms. Thank you so much. 4 Link to comment Share on other sites More sharing options...
doushantuo Posted October 12, 2019 Share Posted October 12, 2019 Thx for pointing out the paper,which i somehow missed! 1 Link to comment Share on other sites More sharing options...
doushantuo Posted October 12, 2019 Share Posted October 12, 2019 BTW: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0031940 Citation: Stohr S, O’Hara TD, Thuy B (2012) Global Diversity of Brittle Stars (Echinodermata: Ophiuroidea). PLoS ONE 7(3): e31940. doi:10.1371/journal.pone. 0031940 3,86 MB NB: diacritic in Stohr omitted Her most important paper is heavily paywalled 1 Link to comment Share on other sites More sharing options...
DE&i Posted October 16, 2019 Share Posted October 16, 2019 That would be a very rare find indeed, @oxford clay keith 1 Regards.....D&E&i The only certainty with fossil hunting is the uncertainty. https://lnk.bio/Darren.Withers Link to comment Share on other sites More sharing options...
DE&i Posted October 18, 2019 Share Posted October 18, 2019 On 12/10/2019 at 1:58 PM, Ossicle said: I am now reading up on them, and have found this paper: https://www.cambridge.org/core/journals/journal-of-paleontology/article/brittle-stars-from-the-british-oxford-clay-unexpected-ophiuroid-diversity-on-jurassic-sublittoral-mud-bottoms/8B34E184DFCF1CEEE275194CE2498B17 I love echinoderms. Thank you so much. Hi @Ossicle Dr Timothy A. M. Ewin Senior Curator, Invertebrate Palaeontology (Echinoderms) Department of Earth Sciences, The Natural History Museum London, Co author of the paper you mention is very approachable via email. If you can send him some quality sharp photos of your find. I'm sure hell respond. I sent some photos to Dr Ewin of some "rare as hens teeth" crinoids from the Oxford Clay. And he replied very quickly, unfortunately for me, the crinoids are misplaced for the moment. But I hope to find some more to send over to him. As we are unsure as to what type of crinoid they are. 1 Regards.....D&E&i The only certainty with fossil hunting is the uncertainty. https://lnk.bio/Darren.Withers Link to comment Share on other sites More sharing options...
Ossicle Posted October 19, 2019 Author Share Posted October 19, 2019 I sent photos to Sedgewick for more information, and they do think it is an ophiuroid @DE&i , Dr Ewin may be able to identify the species, or might be interested in it, so I will send him photos, thank you. What shape were your crinoid ossicles? I just found some quite different to my normal stars, but couldn't find much on the subject in Martill. It's a small lump of rock covered in round ossicles with other different shaped plates and pieces. It's quite different from what I normally find in the clay. Link to comment Share on other sites More sharing options...
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