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  1. I recently stumbled upon this informative gem of an html article discussing modern trilobite lookalikes. Being a trilobite-cephalon myself, I found it fascinating, so I wanted to share it with you all! The article: Trilobite imposters
  2. Photographed this is a river bed near Methven, New Zealand. Approx 28 cm in length. My first impression is overlapping horseshoe crabs.
  3. Perfectly preserved 310-million-year-old fossilized brain found By Harry Baker, Live Science, July 28, 2021 Bicknell, R.D., Ortega-Hernández, J., Edgecombe, G.D., Gaines, R.R. and Paterson, J.R., 2021. Central nervous system of a 310-my-old horseshoe crab: Expanding the taphonomic window for nervous system preservation. Geology. Open access Yours, Paul H.
  4. I wanted to share some horseshoe crab tracks I found at the Stephen C. Minkin Paleozoic Footprint Site in Alabama (Union Chapel Mine) in Alabama this past year. Here is some info about the site: http://www.encyclopediaofalabama.org/article/h-1371 I found the positive side also, but it is broken. I plan to hang this part on my wall eventually.
  5. Last weekend, we went back to a site we had discovered about 10 years ago, along Highway 260 east of Payson, Arizona. The Naco is pretty much all pure carbonate limestone, grey in color and in many places loaded with crinoidal material. But when we discovered this site on satellite photo images, we knew it might be very different. What appeared to be very fine laminar layers in a small outcrop on a side road appeared in the photos. It turned out when we finally went there with our 4WD vehicle, it was a very finely laminated mudstone, with a high terriginous content. (read: dirt from the n
  6. Just joint and wanted to get my first entry in. This middle Pennsylvanian concretion from Mazon Creek, was discovered in 2015 in pit 2, in an area I call Ivy Ridge thanks to all the Poison Ivy in the area. The finger near the top right should be where the shark emerged. I did not find this shark egg case variety posted. I hope this helps in future identification. Eventually I will be getting the measurement blocks. Shark Egg Case Phylum: Chordata Class: Chondrichthyes Palaeoxyris multiplicatum Horseshoe crab Phylum: Arthopoda Superclass: C
  7. There are currently 3 recognized species of horseshoe crab known from the Mazon Creek deposit. Of these 3, Liomesaspis is the rarest. They are only known from the Braidwood (non marine) portion of the deposit. The most defining feature is the bulbous cardiac lobe. The few specimens that I have seen are often poorly preserved.
  8. I don't agree with the title, but the fossil is cool, a renamed and reclassified horseshoe crab from Tasmania. https://m.phys.org/news/2019-10-oddness-australian-creatures.html
  9. Good evening folks, I'm new here but was hoping someone could help me identify my find. Firstly I'll be honest and say I'm not even sure this is a fossil. I found it this evening on a beach walk. So it was found on Skegness beach, this is on the east coast of England at the northern end of the Wash, a bay on the North Sea. Skegness beach is mostly sand with a few pebbles and rocks. There are usually very few fossils on the beach and it's not an area known for it's fossils. Over the opposite side of the wash is the Norfolk coastline, this is mostly made up of cliffs with chalk, san
  10. This fossil is from Quqing of Yunnan, China. It measures 15x20cm. Is it a horseshoe crab, shell or what?
  11. Bender

    Another strange find

    So I’m kinda a metal detecting guy... but I keep finding things that kinda stick out like a sore thumb that are (non metallic).. actually my son found this one flooded lake in northwestern Ontario Canada...at bottom of a eroded clay bank almost on the beach... looks kinda like a horseshoe crab..trying to get some better pics... with the naked eye you can make out a segmented tail (everything really stands out when it’s wet but not sure if that’s a good idea?) any ideas?
  12. ntrusc


    From the album: Carboniferous animals

    Belinurus with preserved legs from the coal measures of the uk.
  13. ntrusc

    Belinurus with legs preserve. Uk

    From the album: Carboniferous animals

    Belinurus horseshoe crab from the coal measures of the uk.
  14. This is a drawing I made a couple weeks ago. It is Euproops danae, a Pennsylvanian Horseshoe crab from the Mazon Creek (proper). My nodule is 100% complete with no restorations. Being a Mazon specimen, it comes from the Francis Energy Shale and is about 300 million years old. This drawing was done on textured paper with 2B and 4B pencils.
  15. I'm running a paleontology camp this summer in Delaware. We can' actually do much digging because there are no fossils at the camp site. We do, however, have living fossils around that the kids can meet. I'd like to introduce the kids to the living fossils and show them the evidence of their ancient ancestors. We have snapping turtles (common and alligator), an alligator, horseshoe crabs, access to ginkgo leaves and magnolia, pileated woodpeckers aplenty, and triops kits are easy to come by online. Anybody have any fossils of these that they could part with? I have mostly marine fossils I can
  16. Crazyhen

    Chinese Horseshoe Crab Fossil?

    Any idea what species of horseshoe crab is that (or is it genuine)? Is horseshoe crab fossil very rare? The specimen was said to be collected from Hebei, China.
  17. Carboniferouspat

    Mazon creek Horseshoe crabs

    Which of the Mazon creek Horseshoes would have been closer to fresh or brackish environment. Has anyone found a Euroopes at Fossil Rock??
  18. The horseshoe crab Mesolimulus walchi is reasonably common within the Solnhofen limestones. Ventral preservation. Lit.: Stunning Discovery: World’s Longest Fossilized ‘Death Track’
  19. Lit.: MOORE, R., McKENZIE, S. and LIEBERMAN, B. (2007): A CARBONIFEROUS SYNZIPHOSURINE (XIPHOSURA) FROM THE BEAR GULCH LIMESTONE, MONTANA, USA. Palaeontology, Vol. 50, Part 4, 2007, pp. 1013–1019. Schram, F. (1979): Limulines of the Mississippian Bear Gulch limestone of central Montana, USA. Transactions of the San Diego Society of Natural History 19:67-74 (1979)
  20. References: Selden, P. & Siveter, D. 1987: The origin of limuloids. Lethaia, Vol. 20, pp. 383-392, Oslo.
  21. References: E R Eller (1936): A review of the xiphosuran genus Bellinurus with the description of a new species, B Alleganyensis. Annals of the Carnegie Museum, v. 27, art. 8. Selden, P. & Siveter, D. 1987: The origin of limuloids. Lethaia, Vol. 20, pp. 383-392, Oslo.
  22. Clay stone layer above the ‘Zweibänke’ coal seam. Steinbruch Piesberg is a sandstone quarry. The quarry itself has been active since the middle of the 19th century, but the mining activities at this location date from as early as 1461. The area was first mined for coal. Piesberg is one of the very few outcrops in Northern Germany where you can dig Carboniferous layers. The quarry itself is famous for its plant fossils from the Carboniferous period, but you can also find remains of dragonflies, roaches, arachnids, arthropleuridae, scorpions and of course horseshoe crabs. Freshwater sh
  23. The horseshoe crab has survived the last five mass extinctions, but now it’s mysteriously dying Akshat Rathi, quarzt, September 14, 2016 http://qz.com/781335/the-horseshoe-crab-has-survived-the-last-five-mass-extinctions-but-now-its-mysteriously-dying-across-asia/ Living fossil' crabs mysteriously dying in Japan Phys.org, September 15, 2016 http://phys.org/news/2016-09-fossil-crabs-mysteriously-dying-japan.html 'Living fossil' crabs are mysteriously dying in their hundreds: 500 dead horseshoe crabs wash ashore
  24. I and other members will be heading to Fossil Rock campground to hunt pit 2 on Sunday October 19th 2014. Hopefully the weather will corporate and we can get our buckets filled! Come and join us. It doesn't matter if you've never done it before, i will be happy to teach you what to look for and how to be successful in your 300mya scavenger hunt. We will meet at the Shell gas station in Coal City @ 8-8:30am. It's just west of rt.55 on 113. Hopefully this link will help http://goo.gl/maps/z6m7q Supplies you need and may want. -shovel, pickaxe, rockhammer (basically a good and sturdy digging de
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