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Found 7 results

  1. Hi everybody, it's been a long time since I've written something on the forum but I read the different thread pretty much every day. Observing in the shadow like Batman but without money, a cool costume and with an hernia just like every fellow 21 yo. However I've recently acquired a Carcharodon sp. tooth from Bahia Iglesia, labelled as an C. hastals with some sort of serration. From what I've read serration in this species might indicate some sort of patology/transitional form. In this case the cusplets/serrations are pretty much symmetrical on both side of the crown so I'm leading toward the second option. So, is this a transitional form of C. hastalis or an early C. hubbelli ? How can I distinguish between the two when the diagnostic characters aren't so obvious? I've also read that tooth from both species tend to have different characteristic if collected from different sites (like a C. hubbelli tooth where the serrations are just barely visible on the enamel) so I'm very confused. Last question: Teeth where the serrations are confined in small part of the enamel are linked just to early C. hubbelli (obviously if belonging to this specie) or is more related to individual differences into the population as a whole? Thanks to all for the answers.
  2. Happy holidays everyone. I would greatly appreciate help identifying the following specimen. It was collected in the Santa Susana Mountains of Simi Valley, Ventura County, California. It came from the Saugus or Pico Formation. Saugus is late Pleistocene to late Pliocene while Pico is middle Pleistocene to Pliocene. My uncertainty regarding the exact formation arises from the fact that (1) it was float material already weathered out of the formation it came from and (2) based on limited research and knowledge, I believe there has been a lack of consenus regarding differentiation of the two formations (see recent work by Richard Squires et al. in Valencia and R. Squires in Newhall). I assume it is marine since all of Pico is marine and Saugus is non-marine to marine. At first I thought it was a shark tooth when I picked it up but I threw that thought out the window when I realized it had three serrated edges. Measures 22 millimeters long and 6.5 millimeters wide. It is 4 millimeters tall on one end and 9.5 millimeters tall on he end that has the needle structure. There are three to four 'bumps' on both long sides on the end with the needle. The bumps look evenly spaced. I can and will do my best to provide additional info if needed.
  3. Basilosaurus molar still attached

    From the album Marine reptiles and mammals

    Basilosaurus isis molar(one side serrated, the other side smooth)still embedded in a small piece of jaw bone. sadly I don't have any information about the fossil other than it is B.isis, and was found in Egypt.
  4. Theropod tooth

    What would this theropod tooth be its measure .7" and its form Two Medicine Formation.
  5. Serious Serrations

    Just thought I'd share some cool pictures I took with my macro lens, getting up close and personal with the knife-like serrations of a few teeth that I've found on my trips. Enjoy!
  6. Odd Hell Creek tooth

    Hi, A short while ago, my wife and I collected in a Hell Creek location on a private ranch in SE Montana. Associated finds were Nanotyrannus teeth, Triceratops teeth, as well as a few Hadrosaur and Triceratops bones. My wife found an unusual tooth. It is about 1 cm in length, curved in lingually, curved to the posterior, and it is serrated on the posterior edge. The denticles have a pronounced upward (towards the tip) direction, and the spacing between denticles is greater toward the base of the tooth. On the lingual face, there are pronounced ridges. From a recent post, I am considering Pectinodon or Troodon, as remote possibilities, but the denticles are not so large, oddly spaced, and there are the pronounced ridges. Any ideas? Thanks. Mark
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