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Found 7 results

  1. ThePhysicist

    Hadrosaurid shed tooth

    From the album: Aguja Formation

    A shed tooth from a juvenile Hadrosaurid. Their teeth are arranged in dental batteries which like a conveyer belt constantly replace worn teeth. Because these marvels of eating machinery house hundreds of teeth at a time, their worn teeth are fairly common. In addition to being worn by the animal's mastication, shed teeth are often smoothed and tumbled by rivers before they are buried in sediment and fossilized.
  2. ThePhysicist

    Baby Hadrosaurid shed tooth

    From the album: Aguja Formation

    Shed tooth from a very young "duckbill" dinosaur from West TX. Height: 4 mm.
  3. With the current pandemic I decided now was as good of a time as any to get some matrix from the Aguja Formation with the help of PaleoTex! This turned out to be a great decision as I was extremely lucky, finding about basically everything I wanted to, and more in only 5 pounds of matrix! I'll be sure to post pictures but I got numerous amia and gar teeth, along with atleast 36 gar scales. Tons of Crocodile teeth including a large Deinosuchus tooth. Several shark teeth and a partial hybodus spine, also several brackish water pycnodontid teeth and tooth pallets. 4 fish or salamander jaws with teeth. Regarding dinosaur teeth I got 17 Hadrosaur teeth, including 2 partially rooted. A partial Ankylosaurus tooth. 4 Therapod teeth including a perfect Saurornitholestes tooth and a Premax. My favorite find however was the Paronychodon tooth I found! I'll be posting that picture first! Highly recommend this matrix, but I was also told that most people don't find all this stuff, so keep that in mind aswell. Stay safe! Happy hunting! (ID's for these specimens done by lab manager)
  4. Hello! I see this skin impression. What do you think about quality? Is a skin impression or mummy skin? The seller told me that belong to Kritosaurus. Thank you so much.
  5. I'm not very familar with Kritosaurus but all of a sudden lots of offerings appear on websites and auctions, goodies from Tucson ? I was interested in a tooth so I started fo do some research to validate their claims. Again trust no ID you see from diggers, sellers and collectors, how many times has that been said yet collectors seem to ignore it.. I also do know that other than the skull elements hardosaur material is very hard to ID to a specific genus and even more so to a speices What is being offered are Kritosaurus bones and teeth like the ones in the photos. Most were identified as Kritosaurus but some were called Kritosaurus navajovius. One identified them as either Kritosaurus or Angulomastacator. So I decided to hit the technical papers to clear some of the fog away and deal in facts at least to my limited reach. Fact: - Kritosaurus navajovius is only described from New Mexico and not Texas - Angulomastacator daviesi appears to be the only decribed Hadrosauridae in the Aguja. Its a Lambeosaurus - Material similar to Kritosaurus has been found in the Aguja but yet to be assigned to any particular hadrosaur (cf Kritosaurus) - Similar age deposits in Belly Group of Canada and Judith River have shown a diverse population of hadrosaurs in the Campanian age. Conclusion: I find it difficult for anyone to assign a genus or species name to any tooth or bones being offered unless it was found in conjuction with diagnostic skull material. Given the diverse hadrosaur population in other campanian deposits its hard to believe that new discoveries will not uncover new identifiable hadrosaur material in the Aguja at least more than 2 species. Sorry but the most accurate identification I can recommend is Hadrosaurid indet. Why Kritosaurus and not Angulomastacator at least its valid. Collectors and sellers need names to collect and sell its just the way the fossil world spins. A genus/species name is a lot sexier than a family name
  6. We all know that Magnapaulia was the biggest lambeosaurine hadrosaur that ever lived, but did you know that Kritosaurus means "broken lizard" due to the original specimen being found with broken nasal bones? Did you also know that the name Charonosaurus highlights the fact that it was found near a river by paying homage to the role of Charon in ferrying souls to the underworld along the Styx River? Also note that the name Hypacrosaurus means "under the top lizard" because Barnum Brown considered Hypacrosaurus to be almost the size of T. rex.
  7. LordTrilobite

    Hadrosauridae Phalanx

    From the album: Reptile Fossils

    Hadrosauridae indet. Digit II phalanx 2 of a left Hadrosaurid foot. Several different hadrosaurs are present at Judith River Formation. Location: Judith River Formation, Montana, USA Age: Campanian, Upper Cretaceous

    © &copy Olof Moleman

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