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Showing results for tags 'diploporita'.
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So...... let's say I wanted to collect one specimen of each class of echinoderms (yes, the classes are always in flux, I know). Not a great specimen, just some ossicle or fragment easily determinable to be a member of that class for each class. It would be a fun trip around the world going to a set of localities, each of which was the easiest place in the world to find specimens of some particular echinoderm class. Some classes (crinoids, echinoids) seem almost too easy; others (blastoids, cyclocystoids, paracrinoids) are hard in some parts of the world but trivially easy here in eastern Missouri, USA. But more obscure classes of echinoderms (ctenocystoids, cinctans, solutans, stylophorans) seem to be hard to find no matter where you go; for each of these, I'm curious what formation / location would be the *least* hard. So let's start with a weird one: Where in the world is it *least difficult* to find a fossil readily determinable as belonging to an ophiocistioid?
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I was watching an online seminar: Pal(a)eoPercs - Sarah Sheffield https://youtu.be/rohOQbEirAQ When, about at 11.54, she says that some Diploporitans lack diplopore (i.e. Amphoracystis) and some non-diploporitan echinoderms have diplopores (i.e. some edrioasteroid). So, which are the Diploporita distinctive features ? In order to tell: "Alright, this specimen belongs to the Diploporita class"
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A Productive Trip To The Napoleon – New Point Stone Quarry Last Sunday
ZiggieCie posted a topic in Fossil Hunting Trips
Last Sunday ( May 24 2015 ) had a great time Fossiling at the Napoleon - New Point Stone Quarry, outside of Napoleon, Indiana, with the North Coast Fossil Club, out of Cleveland, Ohio. Everyone had a great time and I would like to thank the great people of the New Point Stone Quarry for allowing us access to this special fossil hunting area. The Napoleon quarry is world renowned for its well preserved Silurian Diploporita, Holocystites and cystoids, which are very rare at other sites. These are apx. 430 million years old of the Silurian, Early Wenlockian age, in the Osgood member of the Salamonie Dolomite on the Ripley Island area of Indiana. The "t 01" numbering, are temporary numbers, since these are not in my DB yet. The only prep on these is soap and water with a toothbrush. Camera, Olympus Stylus 7040 point and shoot on macro mode with an OTT light for illumination. All of my photos are Photo shopped for color correction, sharpness, cropped and sized. I resize photos down to apx. 1280x960 which makes an apx. 220kb to 300kb file for posting. t 01- Holocystites scutellatus t 02- Holocystites ovatus t 03- Holocystites clavus t 04- Paulicystis densus t 05- Holocystites scutellatus #2 t 06 Pentacystis gibsoni I have more from last years trip there and after doing some prep on them I will add them in. Reference link of the hard to find, full PDF: The North American Holocystites Fauna (Echinodermata: Blastozoa: Diploporita): Paleobiology and Systematics T. J. Frest, H. L. Strimple, and C. R. C. Paul http://www.museumoftheearth.org/files/pubtext/item_pdf_5615.pdf- 19 replies
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