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  1. Unfortunatly this is is a piece found at the outcrop bottom, no opposite mould available. Important: this is a DECALCIFIED specimen, so you see the calcified part negative. Ordovician, scale bar 5mm. 2 pics of the same specimen. Any ideas? Echinoderm? Porifera? Bryozoan?...
  2. Misha

    Crinoid calyx

    From the album: Misha's Silurian

    Siphonocrinus sp.? Siluran Racine Fm. Wisconsin
  3. mbarco


    Ordovician decalcified specimen, the two moulds Scale bar: 5mm I would guess Fenestrida bryozoan, but might it be some sort of echinoderm "thing"?
  4. Found in some landscaping gravel I’ve found boatloads of crinoid stems at. Brachiopods and gastropods are not too uncommon in those rocks. Paleozoic, likely Ordovician-Silurian.
  5. historianmichael

    Boletechinus delawaricus

    From the album: C&D Canal Micro Fossils

  6. historianmichael

    Comatulid Crinoid Centrodorsal Cup

    From the album: C&D Canal Micro Fossils

  7. historianmichael

    Sea Star Ossicle

    From the album: C&D Canal Micro Fossils

  8. Thomas1982


    From the album: Kinzers Formation

    echinoderm? Possibly Camptostroma roddyi Lancaster County, Pennsylvania
  9. Koopyetz

    Today’s finds

    Spent some time at road cut west of Canandaigua Lake. Found trilobite head first, others followed. Nice day for exploring. Regards Rick
  10. SilurianSalamander


    Found on the railroad tracks. Confident it’s an echinoderm based on the apparent pentaradial symmetry. Heart urchin? Probably Ordovician to Silurian stone. Definitely Paleozoic.
  11. Steph

    Echinoderm fossil from FL

    Going through what I found on Spring Break this year (my first ‘ fossil hunt’) on St. George Island, FL Is this an echinoderm? Are there other organisms or the structures seen just deeper exposed layers of the potential echinoderm? Thanks for looking
  12. SilurianSalamander

    Found my first ever microfossils!

    Tiny crinoid columnals. Coming back to the same beach with a sieve tonight.
  13. 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?
  14. 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.
  15. 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.
  16. 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
  17. 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
  18. 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
  19. Thomas1982

    Arbacia imprcera

    From the album: Florida Invertebrates

    Arbacia imprcera Pio-Pleistocene Sarasota County
  20. 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
  21. 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).
  22. 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?
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