caveindia Posted February 15, 2013 Share Posted February 15, 2013 Last December I found this fossil in Eocene Siju Limestone Formation in Meghalaya, India. In the vicinity there are fossils of nummulites and Teredolites longissimus (burrows of a shipworm bivalve). In the only photo that I have of this specimen, all you can see is the margin of the shell. My guess is a limpet, but I really don't know. Are there any other opinions on what this might be? Scale is in mm. Mike Link to comment Share on other sites More sharing options...
Coco Posted February 15, 2013 Share Posted February 15, 2013 Hi, I think it could be a sea urchin. Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Pareidolia : here 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...
caveindia Posted February 15, 2013 Author Share Posted February 15, 2013 Hi, I think it could be a sea urchin. Coco Thanks for that idea Coco. I could see that while one margin is concave, the other is convex, as in a modern sea urchin. Size of 1.5x2.5mm would also fit this contention. Too bad that I was too busy making a map of the cave and did not spend, but a few minutes, taking pictures of fossils. Link to comment Share on other sites More sharing options...
caveindia Posted February 15, 2013 Author Share Posted February 15, 2013 (edited) Although this is a different type of sea urchin, here is a much more upbeat version of the sand dollar-type sea urchin: Edited February 15, 2013 by caveindia Link to comment Share on other sites More sharing options...
PA Fossil Finder Posted February 15, 2013 Share Posted February 15, 2013 Probably not a limpet. I have several modern limpets in my shell collection and they are always perfectly oval on the margin. Stephen Link to comment Share on other sites More sharing options...
caveindia Posted February 15, 2013 Author Share Posted February 15, 2013 Probably not a limpet. I have several modern limpets in my shell collection and they are always perfectly oval on the margin. Thanks. This helps me toward eliminating the limpet idea. Link to comment Share on other sites More sharing options...
Herb Posted February 15, 2013 Share Posted February 15, 2013 I tend to agree with Coco on the urchin. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
caveindia Posted February 15, 2013 Author Share Posted February 15, 2013 I tend to agree with Coco on the urchin. After comparing the anatomy of a modern sea urchin with the fossil, I see the resemblance. Link to comment Share on other sites More sharing options...
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