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  1. Hello everyone. These two teeth were teeth I acquired from a fossil hunter in Russia. The first tooth is a double tipped Archaeolamna sp. The second tooth is a pathological Cretoxyrhina vraconensis (denticulata according to Russian literature). I've got a lot of non-pathological Cretoxyrhina, Squalicorax, Dwardius, etc. if you guys want to see those as well.
  2. HotSauceCommittee

    Shark tooth ID (Texas)

    This was found by myself in Ellis County, TX. I believe the formation was the Atco (or at least the Austin Chalk & Eagle Ford, if I’m not mistaken). The scale is in centimeters. I can post other images if needed; these were the two I just happen to have accessible at the moment. A couple of people who saw it in person said it was Squalicorax. I have some Squalicorax that have the well-known distinctive shape, but I also know that Squalis have teeth that don’t have that angled look. I’d never seen a non-angled Squali tooth before. However, when I posted it online in a Facebook group, an experienced shark tooth collector was absolutely adamant that this is Cretoxyrhina. So now I am unsure. I am more inclined to say it is Cretoxyrhina, but I am far less familiar with vertebrates than inverts. Thank you for any help!
  3. ThePhysicist

    Cretoxyrhina sp. Shark Teeth

    From the album: Post Oak Creek

    Another one of my favorites, the "ginsu" shark, so named for its sharp blade-like teeth. The largest one in the center is indeed from POC, but I bought it online.
  4. Hi, Recently, I had the good fortune to acquire this set of Cretoxyrhina (vraconensis) teeth from the Britton Fm., Texas. I have a detailed account of it’s discovery which describes almost all of these teeth being found together in an area about 18” x18”, with a few stragglers found just outside the main pile of teeth. It’s not complete, but It looks like most of the positions are represented. Some of the larger anteriors were not recovered and I suspect at least one or two positions are missing. I have arranged these teeth into positions that look close to me, but there is no doubt that it needs to be adjusted. I am hoping someone here might know something about these early Cretoxyrhina dentitions and might be able to advise or comment on how I can make this accurate. Some other noteworthy finds recovered from the same 18” square were 2 suspected Cretoxyrhina vertebrae, 5 small Squalicorax (falcatus) teeth, a possible Archeolamna tooth, another very small unidentified cusped shark tooth, and some small fish vertebrae and bones. Thanks for looking. R~
  5. I’m wondering if anyone has put together a dentition of an early Cretoxyrhina with narrow lower teeth and cusped laterals and posteriors. If you have photos of something like this I would very much appreciate seeing what one looks like. Thanks in advance! R~
  6. ThePhysicist

    post oak creek shark tooth

    Hey y'all, this is a shark tooth I found a couple months ago in post oak creek. I initially thought it was a cretodus, but now I'm having second thoughts. The 4th and 5th pictures are cretoxyrhina vraconensis and dwardius woodwardi, respectively. Thanks!
  7. ThePhysicist

    9/28/19 Trip

    From the album: Post Oak Creek

    I found less stuff than last time, but I found a nice centrum and a shard of a mosasaur tooth. A couple teeth grouped with Scapanorynchus may be Serratolamna sp.
  8. From the album: Cretaceous Shark Teeth

    Beautiful and very small, cusped Cretoxyrhina mantelli from Ryazan Region of Russia. Cenomanian in age.
  9. From the album: Cretaceous Shark Teeth

    Beautiful and very small, cusped Cretoxyrhina mantelli from Ryazan Region of Russia. Cenomanian in age.
  10. Untitled

    Cretoxyrhina mantelli Morocco

    From the album: Cretaceous Shark Teeth

    An extremely rare Cretoxyrhina mantelli w/ cusplets from a new site in Morocco.
  11. Untitled

    Cretoxyrhina mantelli Morocco

    From the album: Cretaceous Shark Teeth

    An extremely rare Cretoxyrhina mantelli w/ cusplets from a new site in Morocco.
  12. Untitled

    Cretoxyrhina mantelli Kansas

    From the album: Cretaceous Shark Teeth

    Cusped Cretoxyrhina mantelli from Kansas
  13. Untitled

    Cretoxyrhina mantelli Kansas

    From the album: Cretaceous Shark Teeth

    Cusped Cretoxyrhina mantelli from Kansas
  14. Untitled

    Cretoxyrhina vraconensis Texas

    From the album: Cretaceous Shark Teeth

    Waco, Texas Cretoxyrhina vraconensis. Albian in age.
  15. Untitled

    Cretoxyrhina vraconensis Texas

    From the album: Cretaceous Shark Teeth

    Waco, Texas Cretoxyrhina vraconensis. Albian in age.
  16. Untitled

    Cretoxyrhina mantelli Mississippi

    From the album: Cretaceous Shark Teeth

    Small Cretoxyrhina mantelli from Mississippi
  17. Untitled

    Cretoxyrhina mantelli Mississippi

    From the album: Cretaceous Shark Teeth

    Small Cretoxyrhina mantelli from Mississippi
  18. Untitled

    Cretoxyrhina mantelli Russia

    From the album: Cretaceous Shark Teeth

    An interestingly shaped Cretoxyrhina mantelli from the Ryazan Region of Russia. Cenomanian in age.
  19. Untitled

    Cretoxyrhina mantelli Russia

    From the album: Cretaceous Shark Teeth

    An interestingly shaped Cretoxyrhina mantelli from the Ryazan Region of Russia. Cenomanian in age.
  20. ThePhysicist

    Big teeth!

    From the album: Post Oak Creek

    Large shark teeth including cretoxyrhina, cretodus, and ptychodus. (The left ptychodus would've been massive had it been complete.) Scale bar = 1 cm. Collected 7/18/19.
  21. ThePhysicist

    Post Oak Creek ID

    Hey y'all, I went to POC for the first time yesterday and came back with some stuff I need help ID'ing. 1. Shark teeth - Cretodus crassidens? 2. Large shark tooth - Cretoxyrhina? 3. shark tooth - Scapanorhynchus? 4. Enamel/tooth frag - mosasaur? 5. shark tooth - Cretolamna appendiculata? All scale bars = 1 cm. The enamel (4) is < .5 cm in length. 4 is definitely not shark - too thick - and reminds me of crocodiles, but I haven't heard of any crocs there. I also found another mosasaur tooth frag. I know this can be really difficult, so I really appreciate your help!
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