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  1. Thomas1982

    Devonoblastus leda

    From the album: Mahantango Formation

    Devonoblastus leda Perry County, Pennsylvania

    Turonian echinoid

    I recently found an echinoid in the Prionocyclyus hyatti ammonite zone of the Upper Cretaceous (Middle Turonian) Semilla Sandstone Member of the Carlile Shale. These creatures are not common and until now... ...I have only found fragments. After a quick clean and some photos, I wonder if there is enough diagnostic material left on this crushed and eroded specimen. scale= 1/4" I do not know much about echinoderms, but I am very much interested in learning more. Is there enough of this creature to label a genus? Thank you for your help.
  3. Dean Ruocco

    Undet echinoderm, Cystoid?

    From the album: Mahatango Formation

    An interesting echinoderm caylax from the Niss Hollow member.
  4. Hi, appreciate any ID help on this one from Chivo Canyon in Southern California. About 4-5" in diameter found inside of a roughly 1 foot diameter rock. The area is known for Eocene and Oligocene period fossils. Guessing this may be a sponge, coral, or possibly echinoderm like a Sea Urchin. Stumped on the ID so far. Most of the other fossils in the canyon are mollusks and gastropods. Thanks! -Chris.
  5. Just posting some pics of some finds from Chivo Canyon from 2020 and 2024. Would really appreciate any ID inputs on the Unknown Fossils especially the roundish one with many circles in it. It was roughly 4-5" in diameter in the center of a roughly 1 foot diameter rock. Guessing Sponge, Coral, or may an Echinoderm like an Urchin. The Chivo Canyon area is known to have fossils from the Eocene, and Oligocene periods. There are also a couple other unknown fossils which could be bones but not sure. The Tower Snails or Turritellas are probably mostly Turritella Uvasana. I don't know what the other Gastropods are. Thanks in advance for any ID ideas! -Chris.
  6. Posts of my trip to Oklahoma this week had some unidentified fossils shown. Hope was that someone would mention the identity of the specimens. Since no one did, today I am attaching photos of unknowns from the Viola Formation, Ordovician found south of Sulphur, OK. Maybe @crinus is knowledgeable! Could they be something like Evactinopora?
  7. Does anyone have a drawing where you can understand what a Coronoidea (Echinoderm class) looked like in real life (i.e. brachioles)?
  8. Dean Ruocco

    Lepadocrinites gebbardi

    From the album: Mahatango Formation

    Rare cystoid from the Mahatango, Niss Hollow member, Schykill county.
  9. SharkySarah

    ‘Sand dollar’ Abertella alberti

    From the album: Miocene, Maryland and Virginia, USA

    Calvert formation Calvert co. Maryland.
  10. SharkySarah

    A close up of A. alberti

    From the album: Miocene, Maryland and Virginia, USA

    A close up of ‘sand dollar’ detail. Calvert formation. Calvert co. Maryland.
  11. Thomas1982

    Megistocrinus depressus

    From the album: Mahantango Formation

    Megistocrinus depressus (left) and an unidentified calyx Perry County, Pennsylvania
  12. deltav2

    Crystallised Sea urchin

    From the album: Middle eocene fossils from Qatar

    Nice crystallised sea urchin around 1 cm across from Abarug member in Dammam Formation, Lutetian.
  13. Psittacosaur9

    Solnhofen Brittle Star

    Hello everyone, and I hope you've had a good weekend. I have purchased this brittle star found in the Solnhofen Limestone. Here are the two images they have provided - in any case, they're probably higher quality than my phone would be able to take. They have labelled it as an unidentified species, and that it is known to have grown to a maximum of 3 centimeters across. The slab my specimen is on is 3 cm itself. What should I label it as in my display cabinet? Thanks for the help, it has been much appreciated over the last few weeks.
  14. 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!
  15. Fossildude19

    Echinoderm plate

    From the album: Fossildude's Middle Devonian Fossils

    Echinoderm plate from Arkona. Possibly a crinoid calyx plate.

    © 2023 Tim Jones

  16. 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, they first appeared during the Ordovician. I’m just confused and curious as to how old these rocks are. They’re packed full of fossils and I often find tiny fossils that have eroded out of them and fallen to the ground to collect. attatched are the 2 or 3 blastoids and some of the other fossils I’ve found in these rocks. Any help as to what the age could be would be wonderful! also any IDs on some of the other fossils more specific than “gastropod” or “cephalopod” or “crinoid” are also appreciated. Thank you so much! Y’all are great.
  17. SilurianSalamander


    Hi all! I found this tiny fossil today. It is a bit under half a cm long at its longest point. I can only imagine this is an echinoid but some confirmation would be great! Found in some very fossiliferous rock on the UW Madison campus in Dane County Wisconsin, known for being late Cambrian - early Ordovician. No clue where this rock was quarried. Thanks so much!
  18. I just realized that "some" Cystoidea (divided in the two classes: Rhombifera & Diploporita) have a layered theca. And so I entered into the world of Epitheca, Stereotheca, Treatise on invertebrate paelontology, outer layer,... When I find something like this (see attached file), does that mean it was made up of multiple layers and the outside was removed? If it's so, which Cystoids were layered? Everyone except Polycosmitida? So, a similar specimen, gives no indication as to which Cystoid it belongs to? Thanks a lot
  19. Hey i got this at an italian mineral show bc i wanted some cool stuff for my new apartment. Everything i know ab fossils is from my bio 182 class which is not much. What type of fossil is this? Is it legit? And how much do they go for usually? i believe it’s from morocco but i cant speak italian so i’m not sure
  20. Last month my dad and I took a four-day weekend trip to Western New York to visit some new fossil sites and to collect in the famous Beecher's Trilobite Beds. We had only once before been out to Western New York to collect fossils - a visit to Penn Dixie Fossil Park - so this time around we wanted to try out some different places that we had never collected in before. The trip was a lot of fun and I enjoyed putting my research skills to work in finding new places to visit. I greatly expanded my collection of Silurian and Devonian fossils and found quite a few things on my fossil bucket list. I am excited to hopefully make another trip out there soon and fortunately still have my list of potential stops to make. Thursday On Thursday we woke early and made the 6.5 hour drive towards Western New York. In preparing for the trip I spoke with @fossilcrazy who was kind enough to invite my dad and me to collect from some of the spoils piles on his property from the various fossil collecting trips he has made. I was really excited to explore his pile of Linton Coal as I have very few fish in my collection and even fewer Pennsylvanian marine fossils - one of the consequences of living near Eastern Pennsylvania is that you end up visiting a lot of Late Pennsylvanian Llewellyn Formation plant sites. @fossilcrazy is an amazing fossil collector and an even more incredible member of the fossil collecting community. I cannot say enough about his generosity and hospitality. We were all hoping that my dad and I could find an amphibian or complete fish fossil, but no luck. We found a few isolated Orthacanthus teeth and head spines and some isolated coelacanth scales and bones. Fortunately @fossilcrazy kindly gifted me some representative pieces to add to my collection. These fossils are from the Middle Pennsylvanian Upper Freeport Coal from Linton, Ohio. I highly recommend checking out some of the posts @fossilcrazy has made about his finds from the Linton Coal. They are amazing! Rhabdoderma elegans Here are some close-ups of this beautiful coelacanth head and tail Haplolepis sp. Orthocanthus compressus Teeth and Head Spine Conchostracans Death Plate After visiting with @fossilcrazy we made our way into Buffalo to visit Frank Lloyd Wright's Martin House. My dad is an architect and he really wanted to see the newly restored interior of the house. It is really a quite stunning home.
  21. SilurianSalamander

    Unknown Paleozoic echinoderm

    Crinoid calyx or echinoid? Found in gravel with Ordovician-Devonian fossils. About 2cm across at the widest point. Druzy coating over the fossil which seems to be an external mould. In orange jasper. Thanks so much!
  22. 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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