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Found 23 results

  1. Dugong rib with signs of predation

    This is a dugong rib bone. It appears to have cuts slicing cleanly through growth rings before fossilization.
  2. Hadrosaur Predation fossil

    Here is a hadrosaur ungal that appears to have been chomped on postmortem by a big carnivore, like Rex. Found in Hellcreek SD. What do you all think?
  3. My fossil buddy and I went out this last Saturday, decided not to kayak because it was too windy, so we avoided the Peace or Caloosahatchie rivers and instead headed north to one of our favorite walk in spots to screen for sharks teeth. I was anticipating the water would be warmer than the air, ( 44 degrees) and I was right. It was actually nice to walk the mile into the site in cool air for a change...no bugs, beatiful sunshine and several blooming wild trees. The river was at just the right height. I could show you all the nice shark's teeth I found, but I had decided to give them to a young man at my church who wears a shark's tooth necklace. I have him a nice little box, with an accompanying sheet drawing of each type of fossil and a name so he could learn to identify them....sand, bull, hemipristis, tiger, and even a nice by small megaladon tooth, a couple pieces of ivory, part of a horse tooth, a barracuda tooth, and beatiful gator tooth, a nice 2 inch section of deer antler with its base, a puffer fish plate, several turtle pieces....a lot. However there were two i kept for myself. The vertebrae pictured, that was so perfect I thought it might be recent, but the flame test didn't reveal even a little hint of smell, and the nice shell with evidence of a predator...I can image something smashing into this living busycon, stabbing it, and then ripping the mollusk out of its shell to eat...racoon do you think? Strong teeth. At any rate it was great to be out again. BTW, I am going to post the vertebrae in ids cause I have no idea what it is. It is an inch across....in my excitement to photograph it because it is so perfect, I neglected to add a ruler....sorruy.
  4. NJ Well Preserved Turtle Peripheral

    Hi everyone, I got this interesting peripheral turtle shell from the Late Campanian Wenonah formation of NJ. It is not reworked and seems to be IDable. It also has some interesting shark predation marks on the top of the first pic. It is about 2.75” X 2.25” @non-remanié Thanks for any help!
  5. 600 Million Years Ago, the First Scavengers Lurked in Dark Ocean Gardens, By Asher Elbein, New York Times https://www.nytimes.com/2018/11/30/science/ediacaran-period-predators.html The bizarre organisms of the Ediacaran Period have long puzzled researchers. Fossil discoveries suggest these ecosystems may have been more complicated than once thought. The paper is: James G. Gehling, Mary L. Droser, 2018, Ediacaran scavenging as a prelude to predation. Emerging Topics in Life Sciences. 2 (2) 213-222; DOI: 10.1042/ETLS20170166 http://www.emergtoplifesci.org/content/2/2/213 Yours, Paul H.
  6. Shark Tooth Embedded in Bone?

    If this is truly what I suspect it is, it could be the most extraordinary fossil I've found to date. This was found at Bayfront Park, which is Calvert Formation. It appears to be some kind of bone, probably from a marine mammal. When I first found it, that's all I thought it was: a bone. It was only when I was back home from my trip and sorting through all my finds that I noticed something peculiar. There was something protruding from the bone. I couldn't believe my eyes. It was a fossilized shark tooth. I have always thought it would be incredible to find a fossil with tooth marks or even an entire tooth embedded in it, but I never thought it would actually happen! My best guess at the moment is that this is an ear bone from a small whale or dolphin that fell victim to a lemon shark, and when the shark bit the animal, its tooth was jutted into the bone. When the animal died, its bone fossilized with the tooth still inside it. My question for you is not whether or not the object protruding from the find is a lemon shark tooth; that is fairly clear. I am looking for confirmation that the fossil is indeed a bone, and would like to know what type of bone it is and from what animal. Since I believe this to be an extremely uncommon find, I am considering bringing it to the Calvert Marine Museum to be inspected by the experts there, and if they want to keep it I will gladly donate it. Thank you in advance. ~David (P.S. The tooth is only fully visible in the last picture)
  7. Mini Mosasaur collection

    From the album Marine reptiles and mammals

    A little collection of assorted mosasaur fossils from 2 different places that I got when I first started collecting. 2 different types of vertebrae, one is mosasaur, and the other is a questionable claim of mosasaur, a corprolite that was claimed to be that of a mosasaur, a tooth, & 7 rib fragments. 2 ribs have predation marks, as well as the large vertebra. The large vert has a round tooth indent on the very center. The 2nd rib down has tooth scratches along the surfaces, & 3rd rib down has a round tooth indent in the center, which is probably what caused a strip across the middle to break off. There are 2 other tooth marks on that rib as well, forming a diagonal line from above left of the center indent, breaking off a piece along the top, to below right.
  8. Edaphosaurus with large predator bite

    From the album Permian era fossils

    Yet unidentified Edaphosaurus pogonias bone from the Permian era Red Beds site in North Texas, with large unhealed tooth hole from what appears to be a large Dimetrodon's bite, from either the fatal attack, or post-death predation mark.
  9. Tyrannosaurus fibula?

    So, can anyone shatter my dreams with THIS one? Lol no, I'm really extremely appreciative of the help Ive been getting with questionable fossils, and the chance to learn important and helpful information! the description says it all...this is supposed to be a tyrannosaurus fibula fragment. Seems legit to me, but I could definitely use other opinions. This is a hell creeker.
  10. Hi all, So this little bone piece was found at the beach of Wassenaar, Netherlands; it’s from the late Pleistocene, 40’000 years old. I got two questions on this one: Is it possible to say anything more about this bone fragment (eg what animal/what part of the skeleton)? In the last picture, are those predation marks? I can take better pictures if needed. Thanks in advance for your help! Max
  11. This has been bugging me for some time now, and I can't find any papers that answer these questions. I'm honestly surprised at how little research seems to have been done about these topics. 1. How fast were they compared to some modern-day benthic animals? Were they slow and cumbersome, or were they fast and agile? How did this change through time/environment? I assume that the earlier, Cambro-Ordovician trilobites would have been a fair bit slower than their later counterparts due to a lack of nektic predators that could easily pierce their armor, but this is just my assumption. 2. Did fish actually actively predate on them in any significant capacity? I often see it said that the rise of fish throughout the middle Paleozoic is a reason for the Trilobite's demise, due to increased predation, but I've never actually seen any significant evidence for this. I find it hard to imagine how Palaeozoic fish could have effectively preyed on them - their morphology just doesn't seem to have been suited to "breaking their defenses", so to speak. Even modern day fish seem to rarely actively hunt animals like crabs, which are somewhat analogous to the trilobites in terms of morphology and ecology. 3. Was their post-Devonian terminal decline due to environmental elimination (mainly, the destruction of the Tabulate-Stromatoporoid reefs which they seem to have inhabited in significant numbers), or due to something else?
  12. perimeter defense,molluscan style?

    Posting this because the results of predation can impact (the interpretation of) bivalve taphonomy. Besides,I think documentation like this is rare. Love to be proven wrong,BTW feifdoc_spinepibiontsantipredathorn-spondys.pdf outtake:
  13. Mosasaur Bites Ammonite

    The Mark of the Mosasaur: A 90-million-year-old bite mark raises questions about what seagoing lizards really ate By Brian Switek on April 27, 2017 https://blogs.scientificamerican.com/laelaps/the-mark-of-the-mosasaur/ Gale, A., Kennedy, W., Martill, D. 2017. Mosasauroid predation on an ammonite – Pseudaspidoceras – from the Early Turonian of south-eastern Morocco. Acta Geologica Polonica. doi: 10.1515/agp-2017-0003 https://geojournals.pgi.gov.pl/agp/article/view/25689 Some other papers: Kauffman, E.G. and Kesling, R.V., 1960. An Upper Cretaceous ammonite bitten by a mosasaur. Contrib.Mus. Paleontol.Univ. Mich. 15:193-248 https://deepblue.lib.umich.edu/bitstream/handle/2027.42/48337/ID178.pdf;sequence=2 Kase, T., Johnston, P.A., Seilacher, A. and Boyce, J.B., 1998. Alleged mosasaur bite marks on Late Cretaceous ammonites are limpet (patellogastropod) home scars. Geology, 26(10), pp.947-950. http://geology.gsapubs.org/content/26/10/947.short Tsujita, C.J. and Westermann, G.E., 2001. Were limpets or mosasaurs responsible for the perforations in the ammonite Placenticeras?. Palaeogeography, Palaeoclimatology, Palaeoecology, 169(3), pp.245-270. http://www.sciencedirect.com/science/article/pii/S0031018201002206 Klompmaker, A.A., Waljaard, N.A. and Fraaije, R.H., 2009. Ventral bite marks in Mesozoic ammonoids. Palaeogeography, Palaeoclimatology, Palaeoecology, 280(1), pp.245-257. http://www.sciencedirect.com/science/article/pii/S0031018209002296 https://www.researchgate.net/profile/Adiel_Klompmaker/publication/229134933_Ventral_bite_marks_in_Mesozoic_ammonoids/links/0deec51cff63b6dcba000000.pdf Hewitt, R.A. and Westermann, G.E.G., 1990. Mosasaur tooth marks on the ammonite Placenticeras from the Upper Cretaceous of Alberta, Canada. Canadian Journal of Earth Sciences, 27(3), pp.469-472. http://www.nrcresearchpress.com/doi/abs/10.1139/e90-042#.WRPHjlKZMk5 Yours, Paul H.
  14. I'm looking for some information on predation of Stylemys, I can't seem to find any information on it, other than "tortoises are often found with damage from alligators" Thanks in advance
  15. Spinosaurus

    From the album Nigel's album

    Two predation marks evident on face of tooth
  16. Triceratops frill

    From the album Nigel's album

    Supposed to have predation marks on the rear of the frill?
  17. worm takeaway

    Some of you may have heard of Boucot's compendium of fossil behaviour. This could/should be in there,if it isn't already ulrichfausectB50H12S5.PDF
  18. Madagascar ammonite crushing?

    Can someone tell me about the crushing that is seen in the walls of this ammonites chambers? Its odd to me that in the areas where the entire wall is gone, the geode/vug areas still occur as you would expect them to with chambers? I picked this up for $10 after noticing the crushing, because I don't have any like that in my collection
  19. Just something for the group, I was just wondering if any one else would like to see a category dedicated to Trace Fossils? I like looking up info and seeing pictures on different Trace Fossils and find myself opening various topics and really finding what I am looking for. I think it could be something as simple as adding it to the "Collections" section with a category titled "Trace Fossils", and that could include sub-categories for trackways, coprolites, burrows, predation evidence, ripple marks / rain drops, trails, etc., or just lump it all under Trace Fossils. If not in the Collections area, it could be placed in the General Fossil Discussion area with a sub-category similar to Micro- Paleontology. Thanks
  20. From the album Anomalocaris and friends.

    Close up of the trilobite stuck on the end of the Amplectobelua symbrachiata feeding appendage. From Chengjiang.
  21. From the album Anomalocaris and friends.

    My best fossil. The Anomalocaridid, Amplectobelua symbrachiata feeding appendage with a trilobite curiously attached to the end. Amplectobelua predation on trilobites or trilobite predation on a dead Amplectobelua? From Chengjiang.
  22. Predated Asaphiscus?

    Hi All I was hunting in Wheeler Shale a week ago... When I split open this. Looks like as if the Asaphiscus had been predated on. Could I be right? Wondering what others think. Thanks, SP