cgroat Posted August 31, 2015 Share Posted August 31, 2015 I'm Carl, a new member of the forum as of a few minutes ago. I found this fossil in a piece of limestone in a dry creek bed about 15 miles N of Columbia, Missouri and have been unable to identify it. I took it to a friend at MU, Columbia -- an invertebrate zoologist, but he could not I.D. the fossil. So, any suggestions would be appreciated. Pictures attached. Thanks much. Link to comment Share on other sites More sharing options...
howard_l Posted August 31, 2015 Share Posted August 31, 2015 It is an Echinoid of some type maybe a crinoid Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Archimedes Posted August 31, 2015 Share Posted August 31, 2015 looks like a l Mississippian age partiale crinoid cup Link to comment Share on other sites More sharing options...
the tatter Posted August 31, 2015 Share Posted August 31, 2015 I agree, looks like a crinoid cup. Discovery consists of seeing what everybody has seen, and thinking what nobody has thought. Albert Szent-Gyorgyi Link to comment Share on other sites More sharing options...
Xiphactinus Posted August 31, 2015 Share Posted August 31, 2015 (edited) Definitely crinoid cup. Looks like the Burlington Formation, which would make that Mississippian age. Most likely Physetocrinus. It has those elaborate plates. Edited August 31, 2015 by Xiphactinus Link to comment Share on other sites More sharing options...
Guguita2104 Posted September 1, 2015 Share Posted September 1, 2015 Nice find! For me it's a Physetocrinus crinoid calyx, like Xiphactinus said . Another question:Howard the crinoids belong to the Echinoderms group, not echinoid (another type of echinoderms, wich includes sea urchins). Link to comment Share on other sites More sharing options...
cgroat Posted September 2, 2015 Author Share Posted September 2, 2015 It looks like a bit of consensus on it being a Crinoid calyx - likely Physetocrinus. Much thanks for all the suggestions--this forum is a great resource. Link to comment Share on other sites More sharing options...
howard_l Posted September 2, 2015 Share Posted September 2, 2015 I was using the term Echinoid for Echinoderm as I would use brach for brachiopod, that is why I clarified it with crinoid. Most Geologist I know use the shortened version in discussions that are not formal. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Guguita2104 Posted September 2, 2015 Share Posted September 2, 2015 Howard, Echinoderm is a common name for the members of the phyllum Echinodermata, wich includes many classes of animals that have calcareous endoskeletons and radial symmetry, like the Echinoidea (sea urchins/cidaroids or echinoids ), the Crinoidea (crinoids),the Asteroidea (strafishes), the Blastoidea (blastoids) , the Cystoidea (cystoids)...So, echinoids isn't an abbreviaton for echinoderms.They are members of the class Echinoidea, and like crinoids belong to the phyllum Echinodermata. Here are two links and a image to clarifie it: http://www.ucmp.berkeley.edu/echinodermata/echinoidea.html http://tolweb.org/Echinodermata Link to comment Share on other sites More sharing options...
howard_l Posted September 3, 2015 Share Posted September 3, 2015 I am very aware of the classificaton of Echinoderms and the Taxonomy of their "Phylum", Being a Geologist for over 40 years. Again I was using the term "Echinoid" as a catch all term for any Echinoderm that is not fully identifiable. Most Geologist I know do this also as it is shorter than Echinoderm. If this was a formal geological paper I would use Echinoderm, but in this informal setting most people here would understand the use of Echinoid. Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
Coco Posted September 3, 2015 Share Posted September 3, 2015 Hi, Sorry howard, not french people... Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici 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...
Plax Posted September 3, 2015 Share Posted September 3, 2015 perhaps echinid? Not americans either coco! Link to comment Share on other sites More sharing options...
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