Brad1978 Posted September 19, 2017 Share Posted September 19, 2017 Picked this up out of the Dry Frio river bed near Uvalde, Texas Thought it was a sand dollar at first. Is this an Echinoid of some sort? Link to comment Share on other sites More sharing options...
ynot Posted September 19, 2017 Share Posted September 19, 2017 Can We see other views and a scale? Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Brad1978 Posted September 19, 2017 Author Share Posted September 19, 2017 Hope this helps. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted September 19, 2017 Share Posted September 19, 2017 It looks like the internal mold of a Cretaceous echinoid with traces of shell. The domed top with a flat bottom is similiar to Holaster sp. urchins. See photos of Holaster from Lance Hall's webpage, http://northtexasfossils.com/ : My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Coco Posted September 19, 2017 Share Posted September 19, 2017 Hi, I don't think it is a sea urchin because I don't see ambulacra and interambulacra areas. Coco ---------------------- 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...
Brad1978 Posted September 19, 2017 Author Share Posted September 19, 2017 It almost looks like a sand dollar. Hard to say. Link to comment Share on other sites More sharing options...
Taogan Posted September 19, 2017 Share Posted September 19, 2017 It's got the shape, but I can't see any typical structures Link to comment Share on other sites More sharing options...
Ludwigia Posted September 19, 2017 Share Posted September 19, 2017 5 hours ago, Pedernales78 said: It almost looks like a sand dollar. Hard to say. Sand dollars are flat, but it does look to me like it has the shape of an echinoid steinkern, as DPS Ammonite has already pointed out. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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