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  1. 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
  2. JurassicMeasures

    Fossil Sites in Western PA?

    Greetings, I’ve recently gotten back into prospecting fossils and I’m looking for some suggestions on sites to visit in western Pennsylvania. I frequently visit Ambridge PA to find fern and Calamite fossils from the Mahoning fm and would like to find more. I also would like to find fossils of early Permian (tetrapods, plants, or invertebrates). I hear that Washington county (south of Pittsburgh) has some great spots and would like to know if it were true. I also would like to show some of my findings from Ambridge as well. Note: I’d like this to be suggested places not j
  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. paleoflor

    unidentified plant remains

    From the album: Carrière Les Tuilières (Lodève, France)

    © T.K.T. Wolterbeek

  5. paleoflor

    unidentified plant remains

    From the album: Carrière Les Tuilières (Lodève, France)

    © T.K.T. Wolterbeek

  6. 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)
  7. paleoflor

    unidentified plant remains

    From the album: Carrière Les Tuilières (Lodève, France)

    © T.K.T. Wolterbeek

  8. paleoflor

    Arnhardtia mouretii (?)

    From the album: Carrière Les Tuilières (Lodève, France)

    © T.K.T. Wolterbeek

  9. 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
  10. 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.
  11. 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
  12. 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
  13. Fossil_teenager

    MORE FOOTPRINTS (from the Permian)

    So a few months ago I traveled to El Paso, in search of some trackways from dinos and Permian amphibians. My trackways collection has been lacking for the better part of my whole life so I decided to go get some. If you haven’t already seen them, I’ll include them here: Now how could I possibly get new footprints if I’m all the way in DC? Well, I was doing some cleaning with a toothbrush on this exact rock and to my amazement, I started seeing little footprints in the stone. Knowing that I didn’t see them before, I freaked out and almost had a heart attack. There are now 9 differ
  14. Hello everyone, I recently got some fossils from Russia, some plant remains from Perm Krai where I grew up and a couple of Productid brachiopods from Sverdlovsk Oblast. They are from the Artinskian stage of the Permian period, one is around 2.5cm in width while the other even though incomplete is absolutely gigantic, the largest I have in my collection. I am not great at identifying Productid brachiopods and the Permian is probably the period I have least experience with within the Paleozoic so I have not been able to ID them myself. The large one looks similar to some Reticula
  15. Hello. From a recent trip to the Perm-Carboniferous petrified wood, we brought back some very interesting fragments; nothing like this has come across before. Usually we find fragments of wood (chips), without knots, without a pronounced structure - just highly silicified, indeterminate fragments. But while this trip from a small area (just a couple of square meters), we collected several interesting fragments. This is a solid piece of the trunk with knots located at the same level. 7 knots. Another similar fragment, but split lengthwise. There are only 3
  16. Fossil_teenager

    Texas and New Mexico Dino tracks

    Wow is all I can say. I cannot believe what I have managed to find this week alone. I went to Texas for a vacation, and I’m coming out with some of my best fossils (in my opinion) I’ve found this year. I came here hoping to score some trace fossils of what once lived here, and score some, I did! Since there are two different time zones, and 4 different types of fossils found, I’ll split them up based on environment, and time. With marine fossils going first and tracks going second. Permian first, and Cretaceous second. I’ll do a picture of the whole haul and then we’ll get started. I also was
  17. Can anyone confirm this temnospondyl amphibian is Sclerocephalus häuseri? Thanks in advance. Unprepared about 70 to 80% complete fossil from the Permian of Germany. Geological Time Scale Eon: Phanerozoic Era: Paleozoic Period: Permian Sub Period: None Epoch: Early Stratigraphy Glan Group Meisenheim Formation Odernheimer and Jeckenbacher Subformations Biostratigraphy Odernheimer Bank, Humberg Bank, Jeckenbacher Bank
  18. ThePhysicist

    Developing Orthacanth shark tooth?

    From the album: Permian

    This may be a pathology, or a tooth in development?
  19. ThePhysicist

    Permian microfossils

    From the album: Permian

    These are virtually all the microfossils I found in two small bags of medium-grain matrix from Waurika, OK. The matrix was very fossil rich. The vast majority of the fossils are Xenacanth/Orthacanth shark teeth. Fish material is next most common, then amphibian, and lastly, identifiable reptile material is very rare.
  20. ThePhysicist

    Barbclabornia leuderensis (2)

    From the album: Permian

    Small teeth (only a couple of mm tall) from what could've been a 10'-15' shark.
  21. ThePhysicist

    Labyrinthodont tooth cross section

    From the album: Permian

    A serendipitous natural break in a labyrinthodont tooth nicely displays the enamel in-foldings which give this class of amphibians their name. ^https://aaronrhleblanc.wordpress.com/2019/04/23/dental-origami-the-elegant-shapes-of-folded-dentine/
  22. gdsfossil

    Guadalupe Mountains National Park

    I found this a few years back near (but not in) Guadalupe Mts National Park. Is it a sponge, coral, algae, or something else? Piece is about 6 inches across. Thank you for your help.
  23. ThePhysicist

    Orthacanth shark teeth

    From the album: Permian

    "Eel" shark teeth.
  24. ThePhysicist

    Edaphosaurus "cross-bar"

    From the album: Permian

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