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  1. mbarco

    Ordovician decalcified...?

    Only for who is familiar with decalcified material. Upper ordovician, Italy. Scale bar 5mm. Decalcified specimen are preserved as the internal and the external mould, so the calcified part occupied the space between the two moulds. On the left side: the two moulds of the first specimen On the right side: only one mould available of another specimen (I guess conspecific), worst preservation. Any idea of what could be?
  2. Nimravis

    Sand Dollar ID

    I have had this sand dollar in my collection for forever, I alway keep it with a modern one. I have no info on it and it was given to me from a friend. Any ID and possible location would be appreciated.
  3. Echinoderm identification help please! Polished cross-section in the Kimmswick Limestone (Late Ordovician: Katian; Missouri, USA) used as facing stone at Missouri Botanical Garden. Possibly the paracrinoid Implicaticystis (once known as Comarocystites)? Specimen is ~25 mm across.
  4. Mariah77

    Possible fossil found

    Hi everyone, My son found yesterday on a beach this rock and it looks like a fossil of something. Could you please have a look and let me know what you think? Is this a fossil? Many thanks Mariah
  5. Ever since the Cambrian Explosion, the continent of Laurentia (what is today Eastern North America and Greenland) had been colliding with Baltica (what is today Northern Europe and the Barents Sea). They clashed over millions of years, causing volcanic eruptions, earthquakes, and the usual, creating new large bodies of land. Still, at the same time, another miniature continent was forming, which would eventually become one with the two. This tiny landmass was called Avalonia, a long island that today makes up the middle to the upper eastern coastline of the U.S. and Maritime Canada. This body
  6. Cat in the Hat

    Penn Dixie, NY fossil identification

    I found this fossil at the Penn Dixie site in Western NY (near the creek running through the center) . I've been all over their website, but I can't find anything that looks like this. Sorry the photo isn't larger, my microscope camera isn't set up yet. I think it has 5 part radial symmetry. The lines on the stumpy 'arms' are raised ridges that are small at the tips and get longer as they go towards the center of the beastie. The fossil is .35 Inches from the tip of one stubby leg to the approximate center. I have seen others at this site, but not often. I would rate this type of fossil i
  7. Thomas1982

    Arbacia imprcera

    From the album: Florida Invertebrates

    Arbacia imprcera Pio-Pleistocene Sarasota County
  8. Last week, I had the opportunity to explore a pile of gravel deposited along a road just north of Tampa, Florida. Echinoderms of many types were found weathered out. Some I have IDs on but others perplex me. The condition of many may make identification improbable. But who knows!! @Sacha, unfortunately, this road experience was not nearly as nice as my trip with you. But I feel my finds are of a similar nature. The first one is moderate in size, fairly round and is thick. Agassizia floridana????? The second I am sure is Eupatagus antillarum. The
  9. I know how Crinoid columnals looks like, but which are the features of other echinoderm classes (Rhombifera, Diploporita,...)? Image of a crinoid columnal mould (scale bar 5mm).
  10. I collected this specimen a while ago from the Liberty Formation (Upper Ordovician, Cincinnatian) of Indiana. Honestly, I have no idea what the heck it is. I posted this elsewhere and some thought it might be a strange echinoderm fragment, others thought it might not even be a fossil. Anyone seem anything similar before?
  11. mbarco

    Ordovician echinoderm....?

    Upper ordovician, Italy. Decalcified specimen (it means that you see the mould). Scale bar 5mm. These are 3 different specimens, but I guess of the same species. At first thought they seem a blastoid oral area (never reported blastoids from this formation). But, as 2 of 3 of these specimens are inscribed in a circle, I was thinking about a particular echinoderm stem mould.
  12. mbarco

    Crinoid or Rhombifera stems?

    Upper ordovician, n-e Italy. Scale bar 5mm. I'm not sure of crinoid stem (12-13) or ambulacra, Rhombifera stem, Rhombifera stem lumen,...(6-14)
  13. historianmichael

    Comatulid Centrodorsal Cup

    From the album: C&D Canal Micro Fossils

  14. historianmichael

    Crinoid Plate

    From the album: C&D Canal Micro Fossils

  15. MrBones

    Urchins from Al Ain

    Hello, I found these urchins near Jebel Hafeet in Al Ain, United Arab Emirates. I think they come from the eocene, but I am not quite sure. I forgot to add a ruler in the photos, sorry, just know the largest one is just under 4 cm long. I would appreciate any id's. I will also be posting a picture on the fossil preparation section of the forum to see if I can clean them up a bit.
  16. Hi everyone, Last week after getting lots of recommendations from people I spend a couple of days at Cap Blanc Nez in France to look for some fossils. And while it wasn't to most bountyfull hunt I did have a lot of fun and I was very pleased with the little finds that I managed to do. We had very nice weather, it was sunny and the temperature was just perfect for fossil hunting, and the cliffs and beach (and landscape overall) were absolutely stunning. The fossils in Cap Blanc Nez date back to the Cretaceous and there are deposits from the Turonian, Cenoma
  17. Found this yesterday in Mason County, Kentucky in the general vicinity of Maysville where Ordovician limestone (Bellevue Formation?) is exposed in the roadcuts. Not an expert but hunted enough to immediately appreciate the rarity of the find. After some preliminary research and a tentative identification (Carneyella ulrichi) I seek an expert review and confirmation/correction. These animals seem to be sufficiently rare that a firm ID shouldn't be left up to an avowed un-expert ... who knows little about the differentiating characteristics of edrioasteroids (or even echinoderms) to do more t
  18. Vounassafossilhunter

    Is this a fossil?

    Hello to all users! I found this little rock fragment (mudstone from the Tethys ocean floor I think) in a geosite at the Kozani-Grevena Geopark in greece .....I think that there is a fossil on it. Is it or not? And if yes what species is it? (Echinoderm maybe?) Thank you for your time!
  19. connorp

    Ordovician Unknown - Echinoderm?

    This specimen was found in the Maquoketa Formation (Upper Ordovician) of Minnesota. My best guess is part of an echinoderm (crinoid or cystoid calyx?) but I'm not sure, I've never found anything similar. Any thoughts?
  20. CrankyMa

    Fossil ID- Echinoderm Madreporite?

    I had collected some fossils from Spring Branch, Texas from what I think is the Glen Rose fm near Canyon Lake and I'm wondering what all these little discs are. For some reason I thought they were called foraminifera but in looking on-line, I think that's not accurate. I'm not sure where I heard that these are called foraminifera. Perhaps someone told me that or, more likely, I misremembered something I read somewhere. In looking at Uncle Siphuncle's very, very, very helpful (Thank you. It's a must read!) pinned Comprehensive Guide heading this forum, it seems these little discs are calle
  21. Tetradium

    Nortonechinus primus

    From the album: Lime Creek Devonian Rockford Iowa

    Nortonechinus primus a sea urchin - I suspects the spines is a bit more common than people thought but still rare. More overlooked due to its small size and resembles broken golf tees.
  22. I am hoping someone on the forum is familiar with Ordovician carpoids. i collected this specimen at a roadcut in Claremont Iowa. it is from the Maquoketa Formation. Any information on what species it might be would be greatly appreciated.
  23. historianmichael

    Boletechinus delawaricus

    From the album: C&D Canal Micro Fossils

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