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  1. SilurianSalamander

    .75 inch trilobite?

    Paleozoic rock. I found this looking back through some scrap rocks. I think this is a stone I found some crinoids, brachiopods, horn corals, and a trilobite in before. .75 inches long (sorry for not including a scale in the picture) thanks!
  2. connorp

    Mazon Creek millipede?

    I had this Mazon Creek concretion open today. It was collected from the Braidwood biota (freshwater/terrestrial). My best guess is a partial millipede (Amynilyspes?) but I'm not sure and wanted to get other opinions. Thanks for any help. @Nimravis @deutscheben @bigred97 @RCFossils @stats @flipper559 @Mark Kmiecik
  3. Another mystery specimen; this one belongs to a relative who doesn't take good pics and is far away, so I'll begin by apologizing for the photo quality. No locality info, but this person has many other fossils from Morocco, so that's a possibility. It has hints of fish, but only hints; I think I see one or two fins. What I can't work out is the overlapping arrangement of segments. It looks vaguely like an arthropod (Aglaspid, maybe?), but again, I think I see a fin or two. Uuuughhghghghghghhhh.... It's driving me absolutely bonkers. Help?
  4. Mahnmut

    Lower permian arthropod trace?

    Hello dear fellow forum members, some time ago I was given the remnants of a geologists expedition souvenirs, without any labels. The piece pictured below was in a box together with a nice example of the trace fossil tambia spiralis, and about the same colour matrix. So I assume it could be from the same location, which may be the famous permian Bromacker quarry. It most resembles Limulus traces as far as I could find though. Described from Bromacker are several species of roaches, but on the other hand, I do not know if it is really from there. Any ideas?
  5. Nautiloid

    Eurypterus remipes + Acutiramus telson

    From the album: Bertie Group fossils

    This is a nice association piece showing a decent Eurypterus remipes along with an Acutiramus sp. telson. This piece is from the Fiddlers Green Formation at Lang’s Quarry, and was a gift from a close friend.

    © Owen Yonkin 2022

  6. Crane Hill, AL Carboniferous Thoughts about this textured layer of this rock? A few weeks ago, I realized this specimen was too fragile to be cleaned by a newbie. The surface looks sort of like pebbled leather, but it is extremely brittle. I put it in a box to explore later when I have learned how to clean something like this. Tonight, I came across a pic of megaloolithus in old thread about Dino eggs emphasizing texture. I realize my specimen is is not from the correct time period to be an egg shell of anything - but, it piqued my curiosity again. Din
  7. L.S., Would like to call upon TFF's collective expertise to help with the identification of fossil I found in the Westphalian D (Upper Carboniferous) of the Piesberg quarry near Osnabrück, Germany. The specimen (part and counterpart) shown on the photographs below is almost 8 mm large along its longest dimension. The surface is relatively shiny compared to plant material in the same slab of rock and covered in small tubercles (or other little bumps). The shape is subtriangular in outline and seems to be bounded by a "band" of some kind along at least half its circumference. The "bu
  8. 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
  9. Nautiloid

    Rhinocaris columbina

    From the album: Nautiloid’s phyllocarid collection

    This specimen exhibits both valves. Collected from the Middle Devonian Hamilton Group of Central NY on August 8, 2022

    © Owen Yonkin 2022

  10. From the album: Bertie Group fossils

    Acutiramus sp. from the Phelps member of the Fiddlers Green Formation, Herkimer County, New York. Self collected on August 8, 2022.

    © Owen Yonkin 2022

  11. SilurianSalamander

    Giant Ostracod?

    Found in some Paleozoic chalk and limestone gravel along with crinoids and brachiopods.
  12. connorp

    Mazon Creek Arthropod ID

    I had this Mazon Creek arthropod open recently. It was collected from the Braidwood fauna (freshwater/terrestrial), so initially I thought this was just a tiny syncarid shrimp as they are the most common arthropod to find here. However looking at it closer, I'm not so sure and was hoping for a second opinion. In particular, the legs are short and spiny and do not look like shrimp legs to me, although I may be wrong. Here are images of the positive and negative sides of the "head", middle, and rear, respectively. I put "head" in quotes because I can't tell i
  13. Nautiloid

    Complete Rhinocaris columbina carapace

    From the album: Nautiloid’s phyllocarid collection

    This is a nice 3D example of a Rhinocaris carapace, which was found by me on May 14 at a Middle Devonian site in Central NY

    © Owen Yonkin 2022

  14. Nautiloid

    Rhinocaris columbina

    From the album: Nautiloid’s phyllocarid collection

    This is a great specimen of Rhinocaris columbina which I collected a couple summers ago. Both sides of the carapace are there as well as the majority of the telson, which is tucked around the underside of the rock.

    © Owen Yonkin 2022

  15. Nautiloid

    Echinocaris punctata

    From the album: Nautiloid’s phyllocarid collection

    This beautiful near-complete specimen was collected by me a couple summers ago at an exposure of the Middle Devonian hamilton group in Central NY.

    © Owen Yonkin 2022

  16. Nautiloid

    Rhinocaris columbina

    From the album: Nautiloid’s phyllocarid collection

    This specimen is a partial valve and a partial telson. It was collected by me on May 14 at an exposure of the Middle Devonian Hamilton Group in Central NY.

    © Owen Yonkin 2022

  17. From the album: Fiddlers Green Formation

    A possible Naraoia. Langs Quarry, collected by Dean Ruocco.
  18. An article published today has identified evidence of mating claspers on trilobites from the Burgess Shale. The best analogy would be to current day horseshoe crabs. The significance the authors cited is that it shows sexual dimorphism (males and females of the same species look different) was already well developed in the Cambrian. Their conclusion was based on morphological analysis of the limbs under the 7th thoracic and 1st pygidial segments, which differ from the others and do not reflect feeding adaptations. The theory is that the only explanation is that they have been modified as clasp
  19. Barrelcactusaddict

    Leptomyrmex neotropicus (Dominican Amber)

    From the album: Fossil Amber and Copal: Worldwide Localities

    La Toca Mine Cordillera Septentrional Santiago Province, Dominican Republic La Toca Fm. (Mamey Group) 20.43-13.65 Ma Specimen: 7.7g / 51x21x12mm Equipment: Samsung Galaxy S9 Plus BelOMO 10x Triplet Loupe Quantum 140lm LED Penlight The piece containing these inclusions is absolutely loaded with different arthropods, but the most spectacular inclusions are those of a swarm of 11 extinct Leptomyrmex ants: there are 9 complete and 2 incomplete individuals, averaging 3.5mm in body length. In a lighthearted interpretation, it appears as though the duo i

    © Kaegen Lau

  20. RCFossils

    Terataspis Pygidium

    I wish I could say that I found this one but was able to talk a friend of mine into parting with it. This is an almost complete pygidium of the elusive giant lichid Terataspis. It was found in a remote area of Northern Ontario. The pygidium measures approximately 10 centimeters across.
  21. Hi, I'm looking for help locating a plate that seems to be inexplicably missing from the online version of a classic trilobite paper. The plate I'm seeking is PLATE XXVI (26) from Lehi Hintze's 1952 paper Lower Ordovician trilobites from western Utah and eastern Nevada. Utah Geological and Mineralogical Survey Bulletin 48: 249 p. The only online version I've found, which seems to be missing plate XXVI, is here: https://ugspub.nr.utah.gov/publications/bulletins/b-48.pdf If anyone has access to a paper copy and can post a scan of PLATE XXVI (26) here
  22. Hi, I'm a newbie to this forum and would really appreciate some help identifying a fossil that my son found last week in mid-wales, Upper Gilwern Hill Quarry, Powys. It was found in the same strata of slate with trilobites that the quarry is famous for. multiple photos attached. Many thanks in advance for anyone who can help identify it.
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