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Found 6 results

  1. Hello, I recently made a post about some finds collected from a marine Cenomanian bonebed, but I was so distracted with identifying the hesperornithine bones from the mix of vertebrate remains that I haven't had a chance to positively ID some of the marine reptile teeth found in the assemblage... The teeth in the top row all appear to be from the same species, and are highly compressed, lingually. They appear striated, but are actually completely smooth, and have no occurences of serrations on the edges. I had another really nice one about the same length as that long one but a friend is holding on to it now, so regretably no pics. The second row are also all superficially similar. Notice the prominent, striated ridges which occur only on the middle portion of the tooth, from the end of the root to about 3/4 to the tip. This occurs on all but the middle tooth, which is completely smooth, leading me to believe that it might have belonged to a different species entirely. All of the teeth are more or less round at the bottom. Marine reptiles reported from this formation include indeterminate elasmosaurs and pliosaurs, as well as a dolichosaur suspected to be a certain Coniasaurus crassidens. I suppose my two main questions are as follows, -Do the teeth at the top belong to an elasmosaur or pliosaur? They quite appear different from examples I've looked at online from either group, so I'm a little stumped. -Do the teeth from the bottom row belong to Coniasaurus, and if so, does the tooth without ridges come from a different group than the one with ridges? (it's the only one I found that looks like that, by the way, from among the hundreds of teeth recovered from the bonebed)... As always, any extra input is always welcome. Thanks for your attention.
  2. Pliosaurus or Plesiosaurus

    Hello. My qestion - pliosaurus or plesiosaurus? Fossil from Russia Cretaceous (Cenomanian stage), Tambov and Ryazan region
  3. Pliosaurus from Patagonia

    Hi, Does anyone have copies of the following papers regarding Pliosaurus: Gasparini, Z., and O'Gorman, J., 2014. A new species of Pliosaurus (Sauropterygia, Plesiosauria) from the upper Jurassic of northwestern Patagonia, Argentina. Ameghiniana; 51 (4): 269-283 O’Gorman, J., Gasparini, Z., & Spalletti, L. (2018). A new Pliosaurus species (Sauropterygia, Plesiosauria) from the Upper Jurassic of Patagonia: New insights on the Tithonian morphological disparity of mandibular symphyseal morphology. Journal of Paleontology, 1-14. doi:10.1017/jpa.2017.82 The description of Pliosaurus patagonicus and P. almanzaensis from Argentina shows that Pliosaurus must have been widespread in all seas and oceans.
  4. Found by yours truly (D) from DE&i https://www.bbc.co.uk/news/uk-england-humber-47370838 https://www.grimsbytelegraph.co.uk/news/local-news/sea-monster-pliosaur-scunthorpe-museum-2585293
  5. Brachauchenius

    Brachauchenius lucasi finds are more based in Kansas, but examples in Eagle Ford Texas have been found, most notably Willison's 1907 second B. lucasi skull which has been found in the same area. There is a possibility that this tooth could actually be Polyptychodon hudsoni which have been also found in Eagle Ford, but based on the morphology of the tooth (especially the root part near the crown), I think it is more likely B. lucasi.
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