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Found 20 results

  1. SilurianSalamander


    Are these both blastoids? The larger one is about 2 cm across at its widest point and the smaller is about half a cm across. Ordovician, Dane county Madison Wisconsin. Thanks!
  2. I’ve been told these blastoids appear to be Mississippian in age. That surprises me because the rocks in Dane county Wisconsin are late Cambrian - early Ordovician and the nearest Carboniferous rocks are a long ways away. I’ve done some research into the history of the buildings on the UW Madison campus where I find these fossils and they were supposedly quarried only a few miles from where they now lie. I was also told that blastoids didn’t appear until the Carboniferous. From a quick google search I got the impression that, while they massively diversified in the Carboniferous, t
  3. I am struggling to find proper information on how to identify different brittlestar genuses, so if anyone has a good resource for that, that would be great as well! Found at place de la Crevasse near Equihen, when splitting open a fallen block of layered, clayey shale. Scale is in cm.
  4. Hey all, I could use some specific feedback on this visual guide I'm working on for the diverse blastoid fauna of the Burlington Formation (Mississippian, Mississippi Valley / Illinois Basin). The job of these 3 pages is to show, on each page, one of the three standard views for all Burlington species. Specifically I'd like to ask whether you prefer the horizontal layouts or the vertical ones. For some reasons I prefer vertical, while for other reasons I prefer horizontal. What do you think? Please keep in mind that these are not the only pages in the complete visual guide -- most
  5. Marco90

    Scyphocrinites elegans

    From the album: My collection in progress

    Scyphocrinites elegans Zenker 1883 Location: Boutschrafin, Erfoud, Morocco Age: 420 Mya (Pridoli, Silurian) Measurements: 20x12 cm (plate) Kingdom: Animalia Phylum: Echinodermata Subphylum: Crinozoa Class: Crinoidea Subclass: Camerata Order: Monobathrida Family: Scyphocrinitidae
  6. We've been finding these oddball puffy stars in the Late Ordovician (Sandbian) of eastern Missouri (Illinois Basin), in the uppermost part of the Plattin Group (a Platteville equivalent) or possibly the lowermost part of the Decorah Group (Katian). We've been finding a lot of weird fossils in that zone, including articulated cyclocystoids, but these I'm at a loss on. They seem to be calcite and preserve in the same texture and color as other echinoderm material in the same rock. They vary in convexity and in the presence of a central hump or divot, but there never seems to be a lumen that goes
  7. A friend uncovered this oddball today in the Late Ordovician (Sandbian) of eastern Missouri, in the uppermost part of the Plattin Group (a Platteville equivalent) or possibly the lowermost part of the Decorah Group. He's been finding a lot of weird fossils in that zone, including articulated cyclocystoids, but this one I'm at a loss on. Too wobbly for an orthoconic cephalopod, too much space between calcite elements for a crinoid column. Given the size, is machaeridian a possibility? What other ideas should we be considering?
  8. Eastonian


    I collected this rock slab two years ago outside Napoleon, Indiana, and didn't get around to identifying the two "rings" until this week, when I asked two members of my fossil club for their help. What we have are two specimens of cyclocystoid in the same slab. Each is about 12mm in diameter. Because I collected this from spoils piles, I can't pinpoint the period, but my guess is Silurian or Ordovician. There's no evidence of the peripheral skirt, plates or radiating lines from the center. Only the cupules. I will call on another club member to see if he can do any cleaning that might reveal m
  9. Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to com
  10. Greetings, all! I am currently writing a thesis involving fossils from the Burlington Limestone near its type section along the Illinois/Iowa border. To demonstrate the diversity of the crinoidal remains from the limestone (over 400 species have been described from the Burlington alone!), I am looking for photographs of articulated crinoids. Do any of you have any that you would like to let me include in my thesis? If possible, I would like high-res images of crinoids identified to genus or species with a scale bar/ruler present in the image as well as the collection/locality info. I can'
  11. Gen. et sp. indet.

    echinoderm ossicle

    Different views of a single element, 3 mm at its biggest dimension. I find a lot of echinoids as well as bourgueticrinid and starfish ossicles in the sediment. What's your opinion? Calyx fragment? Lower Campanian, marine, southern Poland.
  12. Gen. et sp. indet.

    crinoids or cyclocystoids

    Silurian (?) erratic boulder from Poland. Echinoderm ossicles. Cyclocystoids or crinoids (eucalyptocrinitid crown & arms?). Please help
  13. Gen. et sp. indet.

    crinoid from gravel

    Southern Poland. Found in parking lot gravel, so age unknown, although Late Jurassic or Late Cretaceous to Paleocene likely. I quess it's an isocrinid - could anything more be added to that?
  14. Death assemblage of rare Oligocene crinoids, Isocrinus, ---ALSO, I'm pointing at an unidentified starfish; there is also a second in the center of this image
  15. Gen. et sp. indet.


    I have 3 specimens of Recent asteroids as a comparative material to my fossils. Is there a place on the internet where I could have them identified? I suspect they are oreasterids: Pentaceraster and possibly two species of Protoreaster, but I'm not sure if really and what species.
  16. mediterranic

    Echinodermata from Morocco ID help

    Hello guys, can someone help determining the genus and species of this Protasteridae from Kaid Rami, please? 4,2 cm maximum diameter, part and counterpart. Thanks in advance, Miguel
  17. К сожалению , я не говорю по английски, но я не плохая фотография, так что позвольте мне сказать , мои фото .. На фото полного цикла от процесса экстракции до готового образца морских лилий Neotaxocrinus. Искренне, Александр Unfortunately, I do not speak English, but I'm not a bad photograph, so let me say my photos .. On the photo of the complete cycle from the extraction process to the finished sample of Neotaxocrinus sea lilies. Sincerely, Alexander
  18. Hello! I'm new to the forum and fossil hunting. I've actually come to it by way of hiking. I've been hiking for years and grown curious about my finds. Most I've come across are easily identifiable, but these two have proven more challenging. A geologist friend suggested that they are a type of echinodermata. But since the first has six rays I thought it might possibly be evactinopora radiata. However, the examples of evactinopora radiata I have seen online are significantly smaller than this example. I know I should have photographed a coin or something next to them to
  19. Any help what kind of this crinoid? thanks
  20. Kara

    Sea star from Finland

    Hello again from Finland! I need your expertise again This big Sea star fossil was found a couple of years ago from an energy peat stock in inner Finland. It originated from a Finnish mire (drained to a peat bog). The pics are poor, but can you identify what species this is? How old can it be? Thank you very much! - Kara
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