MrBones Posted February 25, 2019 Share Posted February 25, 2019 I found this echinoid fossil a few months ago. It is about 10cm long, I have only ever found two of these. It was found on a rocky beach in Abu Dhabi, UAE 1 Link to comment Share on other sites More sharing options...
MrBones Posted February 25, 2019 Author Share Posted February 25, 2019 1 Link to comment Share on other sites More sharing options...
Ludwigia Posted February 25, 2019 Share Posted February 25, 2019 Looks like Clypeaster. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
abyssunder Posted February 25, 2019 Share Posted February 25, 2019 I agree with Roger. 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted February 25, 2019 Share Posted February 25, 2019 I agree with @abyssunder Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Phevo Posted February 25, 2019 Share Posted February 25, 2019 Would anyone come with an example of a similar clypeaster? Based on the intruding petaloids and elongated shape i dont see the connection Link to comment Share on other sites More sharing options...
Quer Posted February 25, 2019 Share Posted February 25, 2019 I know nothing about clypeaster, but it seems Hemipneustes to me, a rare Maastrichtian echinoid genus which, according to Fossilworks, is found in Spain... and Oman (Hemipneustes persicus). This is a piece I have of Hemipneustes pyrenaicus, whith have similar size: Strata information would be most helpful... 1 Link to comment Share on other sites More sharing options...
Ludwigia Posted February 25, 2019 Share Posted February 25, 2019 1 hour ago, Phevo said: Would anyone come with an example of a similar clypeaster? Based on the intruding petaloids and elongated shape i dont see the connection I can see your point now. I just said that it looks like one to me. What would you suggest? 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
abyssunder Posted February 25, 2019 Share Posted February 25, 2019 Hemipneustes or similar holasterid might be a good guess. The misleading character might be the curvature of the petal rows. Now I can see in a blow-up, that they are not turning back to the starting point. For future determination of fossils, it will be good to have images taken from six sides, as it was suggested many times before. Geological settings might be on help, also. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
MrBones Posted February 26, 2019 Author Share Posted February 26, 2019 6 hours ago, Quer said: I know nothing about clypeaster, but it seems Hemipneustes to me, a rare Maastrichtian echinoid genus which, according to Fossilworks, is found in Spain... and Oman (Hemipneustes persicus). This is a piece I have of Hemipneustes pyrenaicus, whith have similar size: Strata information would be most helpful... This one looks more like it, I googled clypeaster, but it looked more like a sand dollar then an urchin. I found this on a beach, and it is encased in very hard clay with rocks and shells. I do not know it's strata. Link to comment Share on other sites More sharing options...
caterpillar Posted February 26, 2019 Share Posted February 26, 2019 This is not a Clypeaster and even less a Hemipneustes. On Clypeaster, the ambulacres are wider and raised. On Hemipneustes, the even-numbered ambulacres are on test. Here we have a sea urchin with hollow ambulacres, in depression. http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
caterpillar Posted February 26, 2019 Share Posted February 26, 2019 Maybe an Iraniaster bowersi with his flexural rear ambulacres. N°4 Sans nom 1.odt http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
MrBones Posted February 26, 2019 Author Share Posted February 26, 2019 Here are some more photos Link to comment Share on other sites More sharing options...
MrBones Posted February 26, 2019 Author Share Posted February 26, 2019 Link to comment Share on other sites More sharing options...
MrBones Posted February 26, 2019 Author Share Posted February 26, 2019 This photo shows the side of the fossil, the line running trough is the underside of the fossil, the sides have been eroded off Link to comment Share on other sites More sharing options...
caterpillar Posted February 26, 2019 Share Posted February 26, 2019 We have to know exactly the level. Have you found other fossils with this echinoid? http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
MrBones Posted February 26, 2019 Author Share Posted February 26, 2019 I have found other echinoids in the same location. Link to comment Share on other sites More sharing options...
abyssunder Posted February 26, 2019 Share Posted February 26, 2019 Some of the other echinoids really look like Clypeaster. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
caterpillar Posted February 26, 2019 Share Posted February 26, 2019 Yes, the other are Clypeaster If you have found these echinoid in the same level, your first echinoid is not Iraniaster because it's cretaceous genus and Clypeaster is miocene Maybe Pericosmus https://www.researchgate.net/publication/221956981_Echinoid_assemblages_as_a_tool_for_palaeoenvironmental_reconstruction_-_An_example_from_the_Early_Miocene_of_Egypt 3 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Phevo Posted February 26, 2019 Share Posted February 26, 2019 18 hours ago, Ludwigia said: I can see your point now. I just said that it looks like one to me. What would you suggest? I didn't have a good suggestion unfortunately, as I haven't Come across similar specimens in the dtrata i usually Hunt Link to comment Share on other sites More sharing options...
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