MrBones Posted January 23, 2021 Share Posted January 23, 2021 Hello, I recently picked up these fossil sea urchins. I think they're miocene in age. I'm not quite sure if these are different types of urchins, or if they are just in different stages of weathering. I put a modern "burrowing urchin" next to the largest one as a comparison. Found in Ruwais, Abu Dhabi, UAE (United Arab Emirates) on a beach with dredged materials on it. 1 Link to comment Share on other sites More sharing options...
fifbrindacier Posted January 23, 2021 Share Posted January 23, 2021 @caterpillar @Coco ? "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
caterpillar Posted January 23, 2021 Share Posted January 23, 2021 Echinometra is a good candidate https://www.sciencedirect.com/science/article/abs/pii/S0016699506802718 2 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Coco Posted January 23, 2021 Share Posted January 23, 2021 Hi, I just watched the same article! Echinometra miocenica seems to be a fossil synonym for Echinometra mathaei. Coco 2 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
MrBones Posted January 23, 2021 Author Share Posted January 23, 2021 1 minute ago, Coco said: Hi, I just watched the same article! Echinometra miocenica seems to be a fossil synonym for Echinometra mathaei. Coco Interesting! Do you think that all the urchins in the photos are the same species? Link to comment Share on other sites More sharing options...
caterpillar Posted January 23, 2021 Share Posted January 23, 2021 Yes, but very eroded 2 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Coco Posted January 23, 2021 Share Posted January 23, 2021 The one on the right is the best preserved. See if you have the same number of pore pairs on each other, it’ll probably be the only discriminant clue left on those fossils (4 pores pairs). Coco 1 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
caterpillar Posted January 23, 2021 Share Posted January 23, 2021 Here, one specimen from south of France http://www.paleotheque.fr/global/fiche.php?id=538&categorie=echinodermes 2 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
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