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  1. Earendil

    Waurika Permian microfossils

    Hello! I've recently been sorting through some Waurika, Oklahoma Permian microfossil matrix, and I've been able to identify most of my finds (As a beginner in the Permian field, @ThePhysicist's Permian album really helped me) but some I haven't been able to pin down yet. I'd really appreciate some ID assistance! Let me know if you need better photos, my photo-taking ability is, alas, subpar. 1. Trimerorhachis jaw perhaps? Or fish? I've heard distinguishing between the two is quite difficult. ~2 mm. 2. A really strange texture, I was hoping it might be diagnostic. The other side is relatively featureless. ~3 mm 3. Another weird looking jaw. It looks fishy, maybe. (I included both sides) ~2mm 4. This also had a bizarre texture. A fish mouth plate? A bit bigger, ~5mm 5. I thought it might be an Eryops tooth but I wasn't certain. It has those kind of crenulations. ~4mm 6. Maybe a worn part of an orthacanth tooth? A really weird texture, almost perforated. ~3 mm 7. A really small possible claw? ~1.5 mm 8. Another possible jawbone? ~1.5 mm 9. I had my fingers crossed for Dimetrodon on this piece of enamel but I'm skeptical. It is pretty big though, (in microfossil terms, at least) almost 6mm. 10. Another possible Dimetrodon candidate? I'm doubtful for this one too. A touch over 3mm. Front: Serrations: The base: 11. Looks like a claw, but it could be a really worn piece of bone. ~2mm That's all, thanks so much!!
  2. Earendil

    Waurika Permian microfossils

    Hello all, I have been sorting through some more Waurika Permian micro-matrix recently, and I was excited to find not just one, but two claws in one day when I hadn't found a single one before this! One is larger than the other and more curved and fearsome looking (well, as far as microfossils go). The bigger one is just over 4mm and the smaller one is a bit over 2mm. I also included a piece which looks maybe like a weird helodus tooth, maybe a fish mouth plate, or maybe a tiny prehistoric iron. Its size is just under 4mm. I'll summon the experts who helped me out last time, @ThePhysicist and @jdp, would you mind taking a look at these? Claw # 1: 4mm Claw #2: 2mm Unknown fishy bit: 4mm That's all, thanks for looking!
  3. Hello! This is a long shot and will probably read more like a Craigslist "missed connections" ad, but I figured it was worth a shot! My husband and I were on a road cut looking for fossils today (Feb 27) between Randlett and Waurika, Oklahoma. A group stopped and asked if we were fossiling and we all ended up having a great chat. Y'all had come from the Whiteside Museum of Natural History Permian Fest and were headed further south into Texas. I believe y'all were associated with the American Museum of Natural History... we didn't exchange names (why?? haha) but y'all pointed us to a fossil hunting site and put it into my husbands map. We never found it! So if by some miracle one of you see this, we would love to try and find the place again. Thank you for the directions (even though we clearly didn't follow them) and for looking at some of our finds and sharing some of yours!
  4. ThePhysicist

    Orthacanthus teeth

    From the album: Permian

    Some more complete Orthacanthus teeth, each maybe about 1/4" in size
  5. ThePhysicist

    Handful of broken Orthacanthus

    From the album: Permian

    One of the most common fossils from the Permian (this locality in particular). Unfortunately, they are almost always broken. Of the hundreds of teeth I have, perhaps only a few larger than a couple of mm are mostly complete.
  6. ThePhysicist

    Eryops tooth

    From the album: Permian

    Eryops teeth are conical (this one bears no carinae, though don't know if that's true for the whole dentition), and often have basal creases.
  7. ThePhysicist

    Permian micro display

    From the album: Permian

    It's remarkable how much of an ecosystem's diversity can be captured in a space smaller than a matchbox. In this case are the likes of Dimetrodon, Eryops, Archeria, Seymouria et al.
  8. ThePhysicist

    Secodontosaurus tooth?

    From the album: Permian

    Teeth from the Permian are often difficult, nigh impossible to identify with confidence. This tooth is strongly carinated, with the carinae proceeding to the base of the crown. It has no labio-lingual curvature and an irregular enamel texture. My best guess at the moment is a synapsid, something like Secodontosaurus.
  9. ThePhysicist

    Orthacanthus serrations

    From the album: Permian

    Orthacanthus (a Xenacathid Chondrichthyan) have squared-off, irregular serrations - distinct from those on say, Dimetrodon.
  10. ThePhysicist

    Orthacanthus bite marks

    From the album: Permian

    I commonly see bite marks on many of these fossils. Some like those on this Orthacanthus cusp were likely made by serrations raking across the surface.
  11. Hey everyone, I've been recently reading through Mark McKinzie's book, Oklahoma Fossil Localities. It's got tons of useful information and has been inspiring me to plan out some future trips across the red river once I'm back in DFW. Hunting for Permian micros in Waurika is at the top of my list, but I have a few questions about the main site and surrounding road cuts. If anyone could reach out to me via PM to discuss Waurika, I would greatly appreciate it! Thanks
  12. Hello, I found this in a microfossil sample from Waurika, Oklahoma, which is the lower Permian. I was unable to match it with anything apart from Dimetrodon or Edaphosaurus claws. I'm likely just being hopeful, but compared to teeth from the same site, it would appear to have no enamel. Could this be a claw from one of these? It's extremely small, about 2.5mm across. Thank you
  13. ThePhysicist

    Bitten Dimetrodon spine

    From the album: Permian

    Dimetrodon spines have a unique shape: ^ Brink et al. (2019) Many bones in the matrix I have appear to have bite marks - parallel grooves in bone. My amateur guess is that these are scavenging marks from a Dimetrodon carcass that got washed into a river and got chomped by Xenacanthid sharks (there certainly are other possibilities).
  14. ThePhysicist


    From the album: Permian

    A freshwater cartilaginous fish with crushing teeth.
  15. ThePhysicist

    Xenacanthid denticles

    From the album: Permian

    The "sharks" that swam the rivers and lakes of the Early Permian wouldn't be fun to pet!
  16. ThePhysicist

    Mystery tooth

    From the album: Permian

    I'm convinced it's a tooth, but not sure what kind. More images here.
  17. ThePhysicist

    Permian reptile teeth?

    Hi y'all, I was thinking again about some Permian reptile teeth, I've seen them referred to online as 'parareptile,' but would like collective and/or professional insight. They are pretty distinctive, with a smooth labial face, and a striated lingual face. These are all from Waurika, OK (Wellington fm, Lower Permian). I have several examples, but they're not much different from these two. @jdp @dinodigger 3.5 mm tall: 2 mm tall: They vaguely remind me of a Caseid tooth, which has the same character of the striations/no striations (or I at least think this one is Caseid...). ^ Reisz (2019)
  18. 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 much appreciated. @jdp@dinodigger Side profile: Basal view:
  19. 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)
  20. ThePhysicist

    Synapsid claw

    From the album: Permian

    Length: 3 mm
  21. ThePhysicist

    Caseid tooth (1)

    From the album: Permian

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

    Caseid tooth (2)

    From the album: Permian

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

    Parareptile tooth (2)

    From the album: Permian

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