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Found 13 results

  1. siteseer

    Squalicorax review

    This thread was inspired by Sander's excellent review of his collection of Squalicorax teeth. I have started getting some of my Squalicorax specimens together and a few have been photographed already to provide additional visual references for collectors. I will try to show teeth chronologically (Albian teeth first, then Cenomanian...) from early in the evolution of the genus and on to the time of its last representatives. I start with the two oldest Squalicorax teeth in my collection - a pair of specimens from the Upper Albian-age Pawpaw Formation, Motorola site, Tarran
  2. We often see pathological shark teeth. This paper reports on double tooth pathologies in the lamniform and carcharhiniform sharks Otodus megalodon and Carcharhinus leucas https://peerj.com/articles/12775/
  3. Hello to all guys!!!, I would like to ask again for help in the ID of some teeth. I´ve been searching in a local university's museum for teeth of the original strata (Upper Paleocene), and I have found a very interesting set of boxes containing a bunch of different teeth, all labeled as "Scapanorhynchus sp.", maybe existing a missidentification. The question would be if any of you guys can ID the pieces and how to differentiate the Scapanorhynchus sp. from Striatolamia striata or Sylvestrilamia teretidens, the options I´m leaning for the ID of the teeth. I would also li
  4. I live near the western edge of Henderson County in Texas. It's a fairly flat area with few outcrops of any kind exposed, and even when they are, they aren't very fossiliferous. The county just west of me is Navarro County, and it does actually have some formations that hold fossils. But I haven't had much luck finding anything in Navarro County. I keep looking, since it's so close. I did a long hike down a Navarro County creek yesterday. For most of the day, it looked like another of those trips where I just don't find anything. But one thing I've learned about fossil hunting is that even aft
  5. Maisch IV, H.M., Becker, M.A. and Chamberlain Jr, J.A., 2018. Lamniform and Carcharhiniform Sharks from the Pungo River and Yorktown Formations (Miocene–Pliocene) of the Submerged Continental Shelf, Onslow Bay, North Carolina, USA. Copeia, 106(2), pp.353-374. Maisch IV, H.M., Becker, M.A. and Chamberlain Jr, J.A., 2020. Macroborings in Otodus megalodon and Otodus chubutensis shark teeth from the submerged shelf of Onslow Bay, North Carolina, USA: implications for processes of lag deposit formation. Ichnos, 27(2), pp.122-141 More papers from John A. Chamberlain Jr, City
  6. Chase_E

    Lamniform unindent.

    From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    Lamniform unindent. If you have an idea of the ID please let me know.
  7. Chase_E

    Lamniform unindent.

    From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    Lamniform unindent. If you have an idea of the ID please let me know.
  8. Chase_E

    Lamniform unindent.

    From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    This is a parasymphyseal of some kind. If. you have any ideas, please let me know.
  9. From the album: Cenomanian Shark Teeth and other Marine Fauna, Ryazan Oblast, Russia

    Pseudoscapanorynchus aff. compressidens. I believe this specimen is a symphyseal. Unfortunately the specimen is broken cleanly in half.
  10. Hello everyone, I was wondering what the Maximum size for a late Cretaceous Cretalamna was? I have this tooth from Mississippi which clocks in at 1 29/32” (with root chipping), and can’t find much information as to the largest size that the genus reached in the Cretaceous.
  11. This tooth was collected in the Sharktooth Hill Bonebed by Bob Ernst back around 1994-1995. At the time he and I thought it was a weird Parotodus because it appears to have a bourlette. The form wasn't really a good match otherwise. It's just over 1 7/8 inches along the slant and about 3/8 inches in labiolingual thickness. The cutting edges are underrated with no hint of lateral cusplets The tip is chipped but it doesn't appear to have been damaged when it was collected. Now, I think it's the giant thresher, Alopias grandis, but seems irregular for that as it basal outline of
  12. Tony G.

    Squalicorax kaupi

    Collected in gravel in the North Sulphur River near Ladonia, Tx.
  13. Here's an oddball tooth from the STH Bonebed. It is something I bought a few years after starting to collect fossil shark teeth, thinking it was a typical Parotodus lateral. After seeing others over the years, this tooth began to look more strange to me. Maybe 5-6 years ago, isurus90064 and I met up in Bakersfield and I showed him this tooth and he thought it was weird too. A couple of weeks ago, we started talking about it again. A friend just took a couple of good photos of it for me. The root isn't as thick as we might expect for Parotodus but some Miocene and older specimens are not
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