tag:blogger.com,1999:blog-3433304117507034540.post7751920349046295804..comments2024-01-27T05:20:35.844-08:00Comments on The Echinoblog: Ophiocistioids! Weird Mystery Fossils from the Paleozoic!ChrisMhttp://www.blogger.com/profile/11784970666468925633noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-3433304117507034540.post-64181719188879706412015-02-25T13:18:46.675-08:002015-02-25T13:18:46.675-08:00You don't say very much about the fossils or s...You don't say very much about the fossils or show any pictures. Having 6 fold symmetry might simply indicate having radial symmetry such as what is seen in corals. I would need to know more. ChrisMhttps://www.blogger.com/profile/11784970666468925633noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-61127562076233587022015-02-25T09:05:43.133-08:002015-02-25T09:05:43.133-08:00I have two examples of fossils from the Cretaceous...I have two examples of fossils from the Cretaceous that show 6 fold radial symmetry. The ribs spiral along an axis and converge at a point. One is from Texas the other from South Dakota. Any IdeasAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-11825977090386515712012-08-09T21:23:08.034-07:002012-08-09T21:23:08.034-07:00I believe they have the "typical" pentam...I believe they have the "typical" pentameral symmetry found in most echinoderms. I've never seen Volchovia but based on the reconstruction, I suppose it could be 2ndarily bilateral. I'd need to hunt down more info on it..ChrisMhttps://www.blogger.com/profile/11784970666468925633noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-40620601463122581222012-08-09T21:08:32.436-07:002012-08-09T21:08:32.436-07:00Are they regularly pentaradially symmetric? Or are...Are they regularly pentaradially symmetric? Or are some of them secondarily bilateral, like heart urchins?Dalenoreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-85644637708294965072012-08-08T04:57:18.801-07:002012-08-08T04:57:18.801-07:00The tube feet emerge via openings on the oral surf...The tube feet emerge via openings on the oral surface. Presumably they move in a fashion similar to sea urchins. But its really hard to say even that...ChrisMhttps://www.blogger.com/profile/11784970666468925633noreply@blogger.comtag:blogger.com,1999:blog-3433304117507034540.post-51722375010741092472012-08-08T00:22:41.176-07:002012-08-08T00:22:41.176-07:00What's their possible style of locomotion? Do ...What's their possible style of locomotion? Do they traverse the seabed like brittle stars do, in a way?Anonymousnoreply@blogger.com