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  • Annelids
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  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

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  1. Tales From the Shale

    Alabama Graptolites

    Here are some of the fossils I acquired in a shale roadcut I was told about thanks to @prem. These are ordovician in age, and I have to say it was difficult to collect them due to the fragility of the surrounding material. Ive identified most of my finds, however there were these unusual pill like outlines I wasn't familar with.
  2. dragonpaws

    Crinoids, packstone, brachyzoans?

    Found these while having a stroll on the beach on the southwestern tip of lake Michigan, in Illinois just south of the Wisconsin border. I am about as novice as you can get, and found this site while trying to figure out what these are... I'm pretty confident that the rings are crinoid stems, unsure about everything else. Hope the pictures are good enough, hard to photograph small things with a phone camera. Mostly curious about the spike shape on this one The smaller one here is the backside of the one above I don't know if these two are fossils, they look
  3. The winner of the May 2022 IPFOTM goes to... Unidentified cidarid echinoid - Santonian age of the late Cretaceous, Dessau Formation - Central Texas Congratulations to @Jared C !!!
  4. Hardly anybody ever talks about the Cambrian fossils of the southern midcontinent (USA). They're super-underappreciated. Show us what you've got! Here's one to start us off: Thorax and pygidium of a trilobite, possibly Orygmaspis, typically referred to as "Orygmaspis cf. Orygmaspis llanoensis" but probably a different species altogether. Note the two pairs of macropleural spines marking the final thoracic segments. Davis Formation (late Cambrian: Furongian), south side of Highway 8, St. François County, Missouri.
  5. I_gotta_rock

    What The Fossil?

    Found this in Big Brook, NJ (Late Cretaceous Navesink Fm.). It's about 2.5 cm wide. I don't even know what phylum to put it in. My first thought was bryozoan. There is one very thorough paper on Bryozoa of the Atlantic Coastal Plain, but it has nothing to fit the bill. Looks like sponge with those big holes. Found a picture of Discopora sp. that looks very close, but that genus is not listed in PBDB anywhere in North America. Gabb thought he had something similar from NJ, but it turned out to be a sand concretion. The last picture is the underside of the specimen, which may or may not be a thi
  6. Check the entries below carefully and cast your vote! PM me if you notice any errors with the entries. The poll ends June 9th. Be sure to vote in our other FOTM poll, HERE 1. Unidentified cidarid echinoid - Santonian age of the late Cretaceous, Dessau Formation - Central Texas 2. Nevadia addyensis trilobite - Lower Cambrian, Addy Quartzite Formation - Roadcut near Addy, Northeast Washington State 3. Oklahomacystis sp. echinoderm - Ordovician, Bromide Formation - Murray County, Oklahoma 4. Acu
  7. Rock Hound

    Fossil Crinoid?

    Any idea what this specimen is? (US Quarter is 24.26mm or 2.426cm) It was gifted to me, without any location information.
  8. Tidgy's Dad

    Waldron Weirdie #2

    Another mystery from the Waldron Shale of the Illinois Basin in Indiana. Any help or suggestions most gratefully received. The object appears to be hollow and sort of tubular. Scale is in mm. so it's pretty small.. Thank you.
  9. SawTooth

    Unknown invertebrate

    I found this fossil a few years ago (since coronavirus started) in south Louisiana. I found another fossil tooth, likely mammal, that conveniently disappeared as soon as I got my forum account. It appears to be an Isapod like creature, any help? Sorry the picture quality is not great.
  10. The winner of the April 2022 IPFOTM goes to... Androgynoceras maculatum ammonite - Lower Jurassic (Lower Lias) - Holderness Coast, Mappleton, West Yorkshire, UK Congratulations to @Welsh Wizard !!!
  11. Check the entries below carefully and cast your vote! PM me if you notice any errors with the entries. The poll ends May 9th. Be sure to vote in our other FOTM poll, HERE 1. Androgynoceras maculatum ammonite - Lower Jurassic (Lower Lias) - Holderness Coast, Mappleton, West Yorkshire, UK 2. Holaster subglobosus echinoid - Cretaceous, Cenomanian - Cap Blanc Nez, Northern France 3. Pearls in Exogyra oyster - Late Cretaceous- Monmouth County, New Jersey 4. Alnus or Betula inflorescence (both male
  12. The winner of the March 2022 IPFOTM goes to... Murex spinicosta & Bolinus brandaris gastropods - Pliocene - Southwest France Congratulations to @caterpillar !!
  13. Check the entries below carefully and cast your vote! PM me if you notice any errors with the entries. The poll ends April 9th. Be sure to vote in our other FOTM poll, HERE 1. Murex spinicosta & Bolinus brandaris gastropods - Pliocene - Southwest France 2. Echinocorys edhemi regular echinoid - K/Pg boundary, Danian, Byala Formation - Varna Oblast, Byala, Bulgaria 3. Canadoceras yokoyamai ammonite - Early Campanian, Haslam Formation - Near Nanaimo, British Columbia, Canada 4. Periarch
  14. RFausta

    A 20 year mystery- coral?

    Twenty years ago, I went on a field trip with my college geology class. We went to Mazourka Canyon in Owens Valley, Ca. The formation here is a grungy limestone, dated Silurian-Devonian, with abundant invertebrates that have often been tinted a brown-rust color. On this trip, I picked this up.. and 2 decades later, I *still* don’t know what it actually is, and nobody I have taken it to has been able to give me an ID.. I have always assumed some kind of coral but thats as much as I have ever gotten. attached are two medium-size photos, top and side views. I can get better photos if
  15. The winner of the February 2022 IPFOTM goes to... Architarbus rotundatus spider - Pennsylvanian, Francis Creek Shale - Mazon Creek, Grundy County, Illinois Congratulations to @flipper559 !!
  16. Quriosity

    Torinia_patula.jpg

    From the album: Lutetian Mollusks

    © @ Alexandre Tuel

  17. Quriosity

    Olivancillaria impressa.jpg

    From the album: Lutetian Mollusks

    © @ Alexandre Tuel

  18. Quriosity

    Murex sp.jpg

    From the album: Lutetian Mollusks

    © @ Alexandre Tuel

  19. Quriosity

    Murex sp 2.jpg

    From the album: Lutetian Mollusks

    © @ Alexandre Tuel

  20. Quriosity

    Athleta citharus.jpg

    From the album: Lutetian Mollusks

    © @ Alexandre Tuel

  21. Check the entries below carefully and cast your vote! PM me if you notice any errors with the entries. The poll ends March 9th. Be sure to vote in our other FOTM poll, HERE 1. Androgynoceras maculatum ammonites - Jurassic, Lower Lias, Sinemurian - Robin Hoods Bay North Yorkshire, UK 2. Lingula sp. brachiopod and Mazopherusa prinosi annelid worm - Pennsylvanian, Francis Creek Shale - Braceville, Illinois 3. Architarbus rotundatus spider - Pennsylvanian, Francis Creek Shale - Mazon Creek, Grundy County,
  22. The winner of the December 2021 IPFOTM goes to... Dipleura dekayi trilobite - Devonian, Moscow Fm - New York Congratulations to @KompsFossilsNMinerals !!!
  23. The winner of the January 2022 IPFOTM goes to... Echinolampas hemisphaerica echinoid - Miocene, Serravallian - Aquitaine, France Congratulations to @fifbrindacier !!
  24. Check the entries below carefully and cast your vote! PM me if you notice any errors with the entries. The poll ends February 9th. Be sure to vote in our other FOTM poll, HERE 1. Syncarid shrimp (maybe Acanthotelson stimpsoni or Paleocaris typus) - Pennsylvanian, Francis Creek Shale - Mazon River, Morris, Illinois 2. Annularia inflata (Calamites foliage whorl) - Pennsylvanian, Francis Creek Shale - Grundy County, Illinois 3. Echinolampas hemisphaerica echinoid - Miocene, Serravallian - Aquitaine, France
  25. 2021 INVERTEBRATE/PLANT FOSSIL OF THE YEAR (IPFOTY) The winner of the 2021 IPFOTY goes to... Urasterella montana starfish - Upper Carboniferous (Pennsylvanian) Kasimovian stage Kreviakian substage - Kasimov town, Ryazan region, Russia Congratulations to @Kanopus !!!
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