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Found 24 results

  1. 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.
  2. Dinocollector

    Jaw from Santa Maria formation, Brazil

    Hello! A collector from Brazil has shown me this fossil. Any idea what this partial jaw could be? It is from Santa Maria formation, Brazil. I don't know if it could be from a Dinosaur... it seems too big to be from a prosauropod... Could it be theropod? Or maybe reptilian or synapsid? Thank you very much.
  3. siteseer

    New Mammal Book

    While at a local Barnes & Noble the other day, I saw a book I had heard about last year (published in September). It's "Beasts before Us: The Untold Story of Mammal Origins and Evolution (Bloomsbury Sigma, 2021). I leafed through it and it looks like a good read if you're into the evolution of terrestrial land vertebrates and specifically, synapsids.
  4. Hi folks, Here's another fossil I've always wondered about. I've always been frustrated with a general lack of early synapsid material (outside of some "pelycosaur" pieces) and I inquired from one of my trusted diggers at the time whether he had any cynodont material. Much to my surprise, he offered this tiny tooth. It's much larger than the classic Morganucodon mammaliform teeth but smaller than the Hell Creek multituberculate material. I had a great deal of difficulty photographing it even with a macro lens. It is from the Bull Canyon Formation, New Mexico, late Triassic. I've tr
  5. 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)
  6. ThePhysicist

    Synapsid claw

    From the album: Permian

    Length: 3 mm
  7. ThePhysicist

    Caseid tooth (1)

    From the album: Permian

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

    Caseid tooth (2)

    From the album: Permian

    Caseid synapsid tooth from the Early Permian. ^ Reisz (2019)
  9. Hello, I am going to purchase this lot that is from Richard's Spur Quarry and I was wondering if anyone on here knows how to ID fossils better than me. I've been looking at pictures all day but can't seem to confidently ID anything. I know most of these are probably Captorhinus, but are there any in this lot that look like a different species or a synapsid such as Varanops? Been searching for synapsid fossils forever and I really hope one of these is from a synapsid. There's 3 claws, 3 vertebrate, and 4 jaw sections. Don't be afraid to hurt my feelings if they all are Captorhinus, I think they
  10. 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.
  11. 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
  12. 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
  13. 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
  14. Howdy folks, me again with more silly beginner questions... I saw this video of a vampire bat running and wondered if pterosaurs - with their crutch-like folded wings - might have moved in a similar manner? Youtube: Vampire Bat on Treadmill I also saw this video of a Panda cub running. Might synapsids like Dinocephalians or Gorgonopsids - with those weird, “inturned” arms - have moved in a similar fashion? Youtube: Panda Bear Cub Running I’m guessing the answers to both of these questions is probably “no” - I would think that even a slight differ
  15. paleo.nath

    Permian bone ID?

    This little bone is around 2 cm long and I’d like to know if this specimen shows any indication towards a species. It was found in a set of micro matrix from the Wellington formation, Oklahoma
  16. Synapsid fossilized in its burrow with offspring indicates parental care by mammal ancestors. https://m.phys.org/news/2019-12-earliest-fossil-evidence-parental-behavior.html
  17. I can't find any pictures that focus on Edaphosaurus claws, and I can't zoom in enough on pictures to get a clear visual of any claws, so I can't see any differences between Dimetrodon and Edaphosaurus claws are. They're both really small compared to the bodies, so it's hard to see from full body/skeleton pictures, and they wouldn't be from enough angles to be sure. Someone who has dealt with lots of them, including on articulated specimens, has said that they're almost the same, and as far as he knows, but isn't 100% sure about it, the biggest difference, the only one he is aware of, is that
  18. Still_human

    Dimetrodon sail spine pieces

    From the album: Permian era fossils

    Very small fragments of dimetrodons sail spines. From the lower Permian Texas Red Beds, Archer city formation in Archer county
  19. Still_human

    Edaphosaurus with large predator bite

    From the album: Permian era fossils

    Yet unidentified Edaphosaurus pogonias bone from the Permian era Red Beds site in North Texas, with large unhealed tooth hole from what appears to be a large Dimetrodon's bite, from either the fatal attack, or post-death predation mark.
  20. From the album: Permian era fossils

    Reverse side of the unidentified Edaphosaurus pogonias bone with an apparent Dimetrodon tooth hole.
  21. Hey everyone, this is for anything Sphenacodont--dimetrodon, or otherwise. Collections/pictures/discussions/whatever. This is the splinter thread off of the sphenacodont collections thread, so if anyone would like to bring over anything from the other thread, please feel free. I'm going to bring over some interesting posted info that covered different topics, and with links to interesting and useful info. *some discussions covering other things and animals in relation to sphenacodonts is perfectly fine. For instance, spinosaurus, Permian topics, apex predators, or whatever. As long
  22. These are a few of the pdf files (and a few Microsoft Word documents) that I've accumulated in my web browsing. MOST of these are hyperlinked to their source. If you want one that is not hyperlinked or if the link isn't working, e-mail me at joegallo1954@gmail.com and I'll be happy to send it to you. Please note that this list will be updated continuously as I find more available resources. All of these files are freely available on the Internet so there should be no copyright issues. Articles with author names in RED are new additions since July 29
  23. These are a few of the pdf files (and a few Microsoft Word documents) that I've accumulated in my web browsing. MOST of these are hyperlinked to their source. If you want one that is not hyperlinked or if the link isn't working, e-mail me at joegallo1954@gmail.com and I'll be happy to send it to you. Please note that this list will be updated continuously as I find more available resources. All of these files are freely available on the Internet so there should be no copyright issues. Articles with author names in RED are new additions since June 9,
  24. Fossil'n'Roll

    fish/reptile jaw section?

    I bought this a few years ago at a local show. It was mixed in with a bunch of small Otodus and sand tiger shark teeth. I don't remember if the vendor said where they came from and I didn't write it down, but I think Morocco is likely.
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