Quer Posted December 31, 2018 Share Posted December 31, 2018 Hello, I found those echinoids in Upper Campanian strata (SE Pyrenees) The first one I guessed to be an Orthopsis miliaris... But there is a problem. Orthopsis' apical disc is dicyclic, and in my specimen it is hemicyclic. I have numbered the plates as in The Echinoid Directory and the ocular plate "V" lies in contact with the periproct: Other options ? The second one is this small one. I guess Thylechinus, but according to TED this is a problematic genus. Apical disc seems dicyclic (madrepores are clearly visible in G2 plate) 1 Link to comment Share on other sites More sharing options...
caterpillar Posted December 31, 2018 Share Posted December 31, 2018 Thylechinus is not campanian but eocene 2 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Quer Posted December 31, 2018 Author Share Posted December 31, 2018 Well, Is what The Echinoid Directory says: http://www.nhm.ac.uk/our-science/data/echinoid-directory/taxa/taxon.jsp?id=2485 But it is only my guess. I'll aprecciate other ones. My specimen is from a Campanian strata, this is certain. Link to comment Share on other sites More sharing options...
ynot Posted December 31, 2018 Share Posted December 31, 2018 @Coco 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...
caterpillar Posted December 31, 2018 Share Posted December 31, 2018 For me the second is Orthopsis 2 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
sixgill pete Posted December 31, 2018 Share Posted December 31, 2018 5 hours ago, caterpillar said: Thylechinus is not campanian but eocene Thylechinus is a troublesome Genus. Recently (within the last 6 or 7 years) Gagaria was moved to Thylechinus. This added 3 species from the eastern United states to the genus that I am aware of T. salis which is Eocene, T. chickasawhay which is Oligocene and T. mossomi which is also Oligocene. There are also 2 different Thylechinus sp. ; one from the late Cretaceous of North Africa and the United Arab Emirates and one from the Paleocene of Nigeria. The eastern U. S. species I was aware of and have two of the three in my collection. The ones from the UAR. North Africa and Nigeria I discovered doing some online research. You can find them on the WoRMS website and on the Natural History Museum of London's Echinoid database. The second one does appear as a possible candidate for Thylechinus, but it would need to looked at in hand by and Echinoid expert in my opinion. 1 Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
doushantuo Posted December 31, 2018 Share Posted December 31, 2018 I think Gagaria is known from the Eocene of Italy edit: i could edit this,but will let it stand. Link to comment Share on other sites More sharing options...
FossilDAWG Posted December 31, 2018 Share Posted December 31, 2018 I edited the title of this thread. Equinoids would have been most surprising in the Cretaceous! Don 1 Link to comment Share on other sites More sharing options...
Quer Posted December 31, 2018 Author Share Posted December 31, 2018 1 hour ago, FossilDAWG said: I edited the title of this thread. Equinoids would have been most surprising in the Cretaceous! Don Link to comment Share on other sites More sharing options...
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