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  1. ThePhysicist

    Metatherian molar

    Rowe, Timothy, et al. “The Campanian Terlingua Local Fauna, with a Summary of Other Vertebrates from the Aguja Formation, Trans-Pecos Texas.” Journal of Vertebrate Paleontology, vol. 12, no. 4, [Society of Vertebrate Paleontology, Taylor & Francis, Ltd.], 1992, pp. 472–93, http://www.jstor.org/stable/4523473. DeMar also has a nice description of the differentiation between eutherian/metatherian upper molars: "The upper molars of metatherians and eutherians are triangular shaped with three major cusps or bumps on the occlusal surface of the crown. The main difference
  2. ThePhysicist

    Theropod

    From the album: Aguja Formation

  3. ThePhysicist

    A Physicist's Collection

    While my prime focus is essentially learning how to accurately describe Nature in the precise language of mathematics, I've always been intrigued by natural history - it's actually what started me on the path to physics. The sort of interrogation that paleontology practices provoked me to think and question even further, down to the fundamental science which makes it all work. Collecting fossils has brought a large amount of enjoyment to my life, and is often a welcome distraction from what can sometimes be straining work. The knowledge that I accumulate along the way is also part
  4. Opabinia Blues

    Aguja mammal tooth

    As I continue to sift through my bag of micro matrix from the Aguja Formation, I came across this interesting little mammal tooth. It looks to me like an incisor but I suppose it could also be a canine. I am completely unfamiliar with Mesozoic mammals and I’m not even sure how far down this tooth is distinguishable, but I thought I’d post it anyway. Super excited as this is my first Mesozoic mammal tooth. Size: ~0.5cm Magnifier 20X from three different angles: Thanks for any information/resources you can point me to. As always, I deep
  5. ThePhysicist

    Theropod tooth fragment

    From the album: Aguja Formation

    Finally, a theropod! It's just a fragment, however.
  6. ThePhysicist

    Lepisosteidae

    From the album: Aguja Formation

    Small gar fish teeth. The tips are often broken.
  7. ThePhysicist

    Hadrosaur

    From the album: Aguja Formation

    Dinosaur material is uncommon in this matrix. This is a fragment of a small hadrosaur tooth.
  8. ThePhysicist

    Eusuchia

    From the album: Aguja Formation

    Very small crocodilian teeth sized at just mm.
  9. ThePhysicist

    Hybodus sp.

    From the album: Aguja Formation

  10. ThePhysicist

    Onchopristis sp. and Squatirhina americana

    From the album: Aguja Formation

    Very small teeth from sawfish and carpet sharks, respectively.
  11. ThePhysicist

    Cf. Melvius sp.

    From the album: Aguja Formation

    Amiid fish teeth.
  12. ThePhysicist

    Rooted Lissodus sp. (2)

    From the album: Aguja Formation

    Very uncommon for this tooth to be complete.
  13. ThePhysicist

    Rooted Lissodus sp. (1)

    From the album: Aguja Formation

    Very uncommon for this tooth to be complete.
  14. ThePhysicist

    Lissodus sp.

    From the album: Aguja Formation

  15. ThePhysicist

    Ptychotrygon sp. Oral teeth

    From the album: Aguja Formation

    Sawfish oral teeth, much smaller than ones I usually find in the Eagle Ford. These are maybe 2 mm in width.
  16. ThePhysicist

    Dinosaur Bone

    From the album: Aguja Formation

    Dinosaurs have a distinct bone structure, with large and well-defined Haversian Systems/Osteons (which look like rings around holes where blood vessels used to be).
  17. ThePhysicist

    Mammal premolar (2)

    From the album: Aguja Formation

    A very small ( ~ 1 mm in length) mammal/multituberculate premolar. Indeterminate species. I unfortunately broke part of the root after this picture was taken.
  18. ThePhysicist

    Mammal premolar (1)

    From the album: Aguja Formation

    A very small ( ~ 1 mm in length) mammal/multituberculate premolar. Indeterminate species. I unfortunately broke part of the root after this picture was taken.
  19. ThePhysicist

    Amber

    From the album: Aguja Formation

    Amber is plentiful in the matrix, appearing as blood-red to orange resinous blobs.
  20. ThePhysicist

    Crocodilian tooth

    From the album: Aguja Formation

    The largest croc tooth I've found in the first batch of matrix, about 6 mm in length. Indeterminate species.
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