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  1. ThePhysicist

    Very strange Permian tooth... synapsid?

    Hi y'all, I found this strange micro Permian tooth. I haven't seen anything like it. It's from Waurika, OK (Wellington Fm.?, Early Permian), has textured enamel, has a broad crown but is VERY thin/compressed, and shows slight crenelations/serrations? on the edges. It's about 2 mm in height. It's not a fish tooth or scale (otherwise there'd be enameloid on only one side were it a scale), not Orthacanthid "shark" (textured enamel, broad, compressed crown), not amphibian (not conical or labyrinthodont), which leaves reptile or synapsid. Any help to narrow it down further would be very
  2. ThePhysicist

    Dimetrodon claw

    From the album: Permian

    Just the end of a Dimetrodon terminal phalange (claw). It could be an undescribed synapsid, but it seems to fit the morphology of a small Dimetrodon claw well (namely the sharp "v"-shaped cross section of the flexor tubercle). Length: 4 mm ^ Maddin & Reisz (2007)
  3. ThePhysicist

    Synapsid claw

    From the album: Permian

    Length: 3 mm
  4. ThePhysicist

    Caseid tooth (1)

    From the album: Permian

    Caseid synapsid tooth from the Early Permian. ^ Reisz (2019)
  5. ThePhysicist

    Caseid tooth (2)

    From the album: Permian

    Caseid synapsid tooth from the Early Permian. ^ Reisz (2019)
  6. ThePhysicist

    Parareptile tooth (2)

    From the album: Permian

    Early reptile tooth. Prominent ridges on the distal face. Height: 3.5 mm
  7. ThePhysicist

    Parareptile tooth (1)

    From the album: Permian

    Early reptile tooth. Prominent ridges on the distal face. Height: 3.5 mm
  8. Ironhead42

    Waurika Site Question

    Does anyone know if the Waurika Permian site is still legal to access? I went by there and there are now Posted signs up. However I have heard that some landowners do that so that they can't be held liable. Any ideas?
  9. TyrannosaurusRex

    Claws, Bones and Jaws ID Requests

    Looking to get some second opinions on some Permian stuff that I found a few weeks ago. Jefferson county, Waurika Oklahoma. You’ll have to ignore the paint on my hands, I’d been doing some painting prior to these photos. didn’t have a small enough ruler nor a printer, so I just made a small measurement reference. 4x 1/4 inch segments on paper. Claw 1 Most of the claws I’ve found are Trimerorhachis, but this one is definitely an outlier. Claw 2 Likely Trimerorhachis? Claws 3 & 4 Two more, the left is likely Trimerorhachis, bu
  10. Hello, I recently visited a Permian site near Waurika Pond and collected microfossils for my students to explore back in the classroom. Is there a guide to identifying these fossils out there somewhere or is piecemeal searching here the way to go. If not, I will be making the one page guide over the summer have it to offer. Any help on something simple for my elementary aged students would be much appreciated. IMG_0064.DNG IMG_0065.DNG
  11. ThePhysicist

    Edaphosaurus sail spine

    From the album: Permian

    These are easily identified by the"cross bars" which protrude perpendicularly from the shaft of the neural/sail spines.
  12. ThePhysicist

    Orthacanthus tooth (2)

    From the album: Permian

  13. ThePhysicist

    Orthacanthus tooth

    From the album: Permian

  14. ThePhysicist

    Helodus

    From the album: Permian

  15. ThePhysicist

    Archeria

    From the album: Permian

    Holmes (1989): "The skull and axial skeleton of the Lower Permian anthracosauroid amphibian Archeria crassidisca Cope" Art by Dmitry Bogdanov
  16. ThePhysicist

    Dimetrodon Tooth

    Identification: This tooth was found in processed microfossil matrix from Waurika, OK, USA. Reptile remains in general are very uncommon, so if you think you've found many pieces of Dimetrodon teeth, you're likely mistaking many Orthacanth shark cusps. Orthacanth shark enamel is smooth, and the serrations are quite prominent compared to those on Dimetrodon which are finer. Dimetrodon enamel is not smooth, as seen on this one. Dimetrodon crowns are also broader. Shark cusps broken at the foot of the crown also flare out, where reptile teeth do not. Were this crown complete, you would also not
  17. ThePhysicist

    Lungfish tooth

    From the album: Permian

    Ornamented lungfish bone/scales are fairly common, but their teeth seem to be comparatively rare. This one is ~ 3 mm in its longest dimension. ^Mottequin et al. (2015)
  18. ThePhysicist

    cf. Dimetrodon grandis

    From the album: Permian

    Now how can this crumb of a tooth be attributed to Dimetrodon?? First, it's serrated. It could be shark? The enamel is not smooth (not very visible in this image, a little at the bottom), so no (additionally, the serration shape is different from those of Orthacanth sharks). That narrows it down to serrated Synapsids. It turns out that very few animals at this time and location had "true" serrations, not just enamel serrations, but bumps in the dentine beneath the enamel. The enamel on this piece happens to still be clear, allowing one to see the globular dentine underneath! From B
  19. ThePhysicist

    Labyrinthodont tooth structure

    From the album: Permian

    A "lucky break" in a Labyrinthodont tooth (likely Temnospondyl amphibian) still embedded in matrix reveals the intricate labyrinth of plicidentine.
  20. ThePhysicist

    Dimetrodon tooth

    From the album: Permian

    Dimetrodon sp. Wellington/Ryan Fm., Waurika, OK, USA Post-canine/posterior tooth This tooth is likely from D. limbatus, given the locality and presence of serrations: https://www.nature.com/articles/ncomms4269 The same paper also rules out other serrated Sphenacodonts by the enamel ornamentation. Its smaller size could indicate that it's from a juvenile. It differs from the comparatively abundant broken Orthacanth shark tooth cusps in the microfossil matrix (what most people are likely to confuse with): the enamel texture is not smooth, the c
  21. ThePhysicist

    Hatchling Dimetrodon Claw?

    Hi y'all. Found this in some Permian micromatrix from Waurika, OK. There's no way I'm this lucky, but is this a very tiny Dimetrodon claw? I've tried to get access to this paper, but still waiting to see if the authors will send the text. I'm fairly confident it's at least sphenacodontid, based on pictures I've seen on the forum. It's about 3 mm in length. @dinodigger@jdp
  22. ThePhysicist

    Developing Orthacanth shark tooth?

    From the album: Permian

    This may be a pathology, or a tooth in development?
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