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  1. Opabinia Blues

    Permian Pelycosaur Appendicular Bone

    Here’s a pelycosaur appendicular bone I acquired from a vendor well-acquainted with Permian material a while back. It was sold to me only as Dimetrodon limbatus from the Archer City Formation in Texas. Thing is, I’ve never been able to place exactly what bone it is, and it doesn’t seem to match any appendicular elements of Dimetrodon which I could find references for. Here’s to the hope that there’s somebody here well-acquainted with this material who can put me on the right track!
  2. Hello, I was hoping someone could let me know if these fossils are genuine Dimetrodon from Archer County, TX Nocona Formation. Thanks!
  3. JamieLynn

    Dimetrodon tooth? Oklahoma Permian

    I've been going through some of my micro matrix pictures from the Waurika Permian site I visited in May and this little tooth has me thinking it might be Dimetrodon....the shape is possibly correct and there is just a TINY bit of evidence of carina on one edge. Perhaps a juvenile? It's tiny tiny....3 mm . You can just barely see the carina on the left side
  4. Ok I also think it is time for us to see more of the members collections . So without further ado show us your Sphenacodontidae collection . is an extinct family of small to large, advanced, carnivorous, Late Pennsylvanian to middle Permian pelycosaurs. Sphenacodontid fossils are so far known only from North America and Europe and have one of the most ironic creature ever to have lived in there ranks, Dimetrodon. And a claw from the same location.
  5. Well, 2 days ago I was freezing my butt off in Chicago and today its almost 90 degrees here in Oklahoma! But warm dry weather is perfect hunting time, so I headed out to a ranch I started searching last year. After many hours of walking and eyeballing every bit of rock exposure, something finally caught my eye. I immediately recognized the bone structure, marked the spot and kept searching. More and more bits started to show up and I immediately recognized the "figure 8" shaped that is distinctive of the sail spines of Dimetrodon! This is the animal I have been hoping to find since I began my research into Oklahoma fossil locations. I was super excited. These were found on surface as "float", so I marked every spot with engineer tape. When I couldnt find any more, I stood back and looked at a perfect triangle pointing to the highest spot where I found material, and it was also several bits together. So now I have an arrow pointing to my dig site. My only hope is that I am just finding the tips (since almost all of it was sail spine bits) and the rest of it is still in the ground waiting. Fingers crossed. Even if this is the only parts left, I'm still super excited. Most were sail spine bits and some were BIG, huge compared to what I saw on my day of digging in the Craddock bone bed in Texas. Also a few other bits that might be pieces of rib or limbs. Also, 2 bits of Orthocanthus shark headspine (actually the first items I saw) and 2 coprolites including 1 that has visible bone bits in it! @thelivingdead531 I know its been 3 years, but I'm a heck of a lot closer to finding that Ddon tooth I promised you! My field collection collection Dimetrodon sail spine bit That distinctive shape for sail spine! and another one Everything brought home Not a great pic, but the light spots are bits of bone in this coprolite. Othocanthus spine pieces. Ortho head spine showing denticles 2nd ortho head spine with denticles
  6. LP77

    Slate Slab

    Hi. We recently underwent some renovations on our house and after wiping off plaster dust on our fireplace slate slab, the following prints were discovered. These are depressions and not handprints from oily skin. The slate slab, more than likely, came from Vermont. My research suggests that slate takes around 300M years to form. Any thoughts on what creature may have created such prints? It is difficult to chalk the prints up to random coincidence, yet the time period for slate to form would suggest early tetrapods. Has anyone found similar prints? Does anyone have any thoughts on what it might be? Appreciate the feedback. Luis
  7. I recently attended the PermianFest event at the Whiteside museum in Seymour Texas. Along with several days of great speakers, they also offered dig workshops at one of their Permian redbed sites. I absolutely couldn't make the trip without getting in on a dig! I only went for a single day in the field, I wish it could have been for 5, it was so great. We were digging in the Craddock bonebed, a location where many museum specimens of Dimetrodon, and many other Permian fauna have been recovered. It was a special treat to be working a quarry site in the footsteps of Cope, Sternberg, Bakker and more. The shear amount of fossil material is staggering. I thought that the PaleoAdventures Hell creek site was dense, this was packed even more. We started with surface collecting. Just plop down on a bit of ground and start looking. Ddon, Eryops, Orthocanthus and more species of bone bits everywhere. Everything I collected on the surface was in an area about 2ft x 2ft. After getting our eyes tuned in on the shapes, sizes, and colors of the fossils, we moved into the quarry to begin working back the quarry face. I am convinced that we were exposing a new Dimetrodon skeleton. I was uncovering ribs, verts and sail-spines, the people to my right were finding cervical verts, and the man to my left was finding verts, spines and an ilium. It was a great dig, I wish it wasn't almost 5 hour drive each way for me.
  8. 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.
  9. Dani O.

    Dimetrodon Claw?

    I'm hoping someone can help me identify this fossil. I believe it could be a claw of some sort. I was super stoked to find it.
  10. Georgemckenzie

    Fossil juvenile claws Permian Oklahoma

    Hiya everyone was curious to what these claws are seller says there from a juvenile dimetrodon pelycosaur
  11. Hi there everyone! I came across a listing for a “dimetrodon claw” and would really appreciate it if y’all could give it a look and tell me what y’all think. The majority of my knowledge and collection mostly consists of specimens from the Hell Creek formation so I’m not too knowledgeable when it comes to permian age fossils, though I’d love to expand my horizons and learn about everything I can. The specimen is said to be a dimetrodon claw from the Ryan Formation, Waurika Oklahoma. I’ve gone ahead and contacted the seller for any more information about the specimen so I’ll keep y’all updated. Thank you all so much!
  12. During the Summer, I had the fortune of driving near Seymour, TX and thus the opportunity to pay a visit to the WMNH. The WMNH is a small but unique museum in Northern Texas, specializing in the Early Permian fauna that lived nearby ~ 290 million years ago in the famous Texas "red beds." The land around Seymour was once an equatorial bayou, humid and inundated with rivers and lakes. In the rivers were lungfish like those that live today, various ray-finned fishes, and cartilaginous fish like the Xenacanth "sharks." Amphibians like Eryops, Seymouria, and Diplocaulus also spent much of their lives in the water, but were capable of venturing onto land. The most famous not-a-dinosaur Dimetrodon was the terrestrial apex predator, living among other stem-mammals like Edaphosaurus and Secodontosaurus. Early Dinosaurs and mammals were still tens of millions of years in the future. Most of these interesting animals are rarely found in museums, so the chance to see so many of them in one building was an uncommon privilege. Outside the building, a larger-than-life Dimetrodon stands watch over the murals. The building is also lined with large Ammonites. an Eryops tries to find some shade Inside, there are several life reconstructions of some of these animals, the first one being Dimetrodon The first of several Dimetrodon individuals, "Bonnie" The red matrix has been coated with a dark grey material to increase contrast with the bones. There is a partial Diplocaulus amphibian skull in its belly Something I hadn't known: Dimetrodon may have been venomous?? I look forward to the publication of the evidence A couple of large Eryops, their skulls were comparable in size to those of large Alligators Various skeletal elements 1. D. grandis femur, 2. Dimetrodon sp. femur, 3. Edaphosaurus pogonius tibia, 4. Dimetrodon sp. tibia, 5. Edaphosaurus pelvis, 6. Dimetrodon sp. pelvis, 7. Secodontosaurus pelvis Diadectes, a herbivorous tetrapod incisorform and molariform teeth indicate it was capable of stripping and masticating vegetation, a novel development among tetrapods of the time. It also had a secondary palate like we do, meaning it could chew and breathe simultaneously. Diplocaulus, the "boomerang-headed" amphibian Dimetrodon elements Neural spine with a pathology, a healed break possibly from the attack of another Dimetrodon Maxilla with a broken canine, proposed to be broken in life Pelvis with bite marks, possible evidence of cannibalism Another Dimetrodon Some plants
  13. Hello I am planning a trip to Oklahoma and wondered if anyone knew were to fossil hunt in the waurika area? Thanks
  14. 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)
  15. carch_23

    Dimetrodon vert?

    Hey guys, just saw this dimetrodon vertebrae for sale. Not really familiar with reptilian material and tried checking in the forum for similar threads for reference but cant seem to find one I could use. Also tried looking fkr similar ones for sale online but just not really familiar with reptilian material to positively ID mine. Was hoping if you guys may be able to help me with this one though and if it was possible to ID them to a species level? Cheers! PS. Currently asking for more specific locality but atm, all I have is that it is from Texas. Age Location Formation
  16. 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 of the fun. Here is my collection, which will always be a work-in-progress. There's still many things I haven't photographed yet, but I feel comfortable saying this is the majority. I don't have many big things, but I'm certainly pleased with the many small things I have so far. Links to albums: Dinosaurs Sharks North Sulphur River Post Oak Creek Permian Aguja Formation Harding Sandstone Devonian Galveston Fossils Miscellaneous Highlights / Personal Favorites: The ones underlined are linked to their respective fossil page in the Fossil Forum Collections, which has more information and photos. Infant Tyrannosaurus rex posterior tooth If I could keep only one fossil, it would be this one. It's from my favorite animal that has ever lived, and being from a young'un is just so darn cool. A true crowning jewel in my eyes. Juvenile Tyrannosaurus rex maxillary tooth Again, you can't go wrong with T. rex. It doesn't have the best preservation but regardless, there's a lot more to love. Tylosaurus proriger tooth (self-found) Undoubtedly my favorite find to-date. Finding fossils yourself adds that extra value to its place in your collection. I'll remember the moment I first saw it for a long time. Triceratops prorsus tooth Triceratops is another one of my favorite dinosaurs, I think we all grew up playing with toys of T. rex and Triceratops. Unique circumstances also allow for me to say it's Triceratops and not Torosaurus with some confidence. It's not perfect, but still a significant part of the collection. Avisaurus archibaldi tooth A bird tooth? Doesn't get much cooler or more uncommon. Dimetrodon cf. limbatus tooth I've always been drawn to "icons of life," since those are the ones we remember from childhood. Dimetrodon is definitely an icon, and I'm glad to have found one of these uncommon treasures (in micromatrix - it was a very nice surprise). Cretoxyrhina mantelli tooth One of my favorite shark species, the "ginsu" had sleek-looking teeth, ate mosasaurs and dinosaurs, and was overall a formidable animal worthy of admiration. Cretodus crassidens tooth (self-found) Another one of my favorite sharks. It's not big or complete, but the preservation is so rare for the locality (POC) - the gloss on the enamel is as if it fell out of the shark's mouth yesterday. Saurornitholestes langstoni tooth I'm currently working on growing the dinosaur component of my collection, and this is my first Dromaeosaurid. Dromaeosaur tooth (Hell Creek Fm.) My most recent addition (as of Sept. 4, 2021), and it's my best dinosaur tooth for sure. Unfortunately it will be labeled as only a Dromaeosaurid tooth for now, but it still is just a great tooth from a cool family of dinosaurs. Shark Tooth Riker Display I've got one riker that I've tried to squeeze as many teeth into as possible. I need to get a couple more, probably; there's a lot of teeth that deserve a riker, but are just lying around. I'll try to update this thread semi-regularly as I make acquisitions in the future.
  17. I had the pleasure of arranging a special fossil hunt to the Red Beds of Texas - a famous Permian site that was originally described by Copes in 1870's and later by Romer. It's an old quarry on private land that we were able to take a group of 10 to hunt on. And I was corrected by our guide that it was really not so much a "hunt" as a "collect" because the fossils were literally EVERYWHERE! You could sit in a 10 foot radius circle and be picking up vertebrate material all day long! We collected for about 5 hours and everyone came away with some fabulous fossils. Lots of amphibian skull pieces, sometimes with jaws and teeth sockets, vertebrae, lots of little toe bones, shark teeth and spines and much more. Most were small things, but occasionally you'd fine a nice big vert or piece of bone. Full Dimetrodon skeletons have been recovered from this site as well as amphibian Eryops and others. Here are some of my favorites from the "collection"! Dimetrodon toe bone: 3/8 inch Amphibian Eryops Toe bone: 1 inch Eryops ungal (toe bone) 1/2 inch Eryops jaw and tooth sockets - 1 inch Amphibian skull fragment (the biggest bit I found - 1 1/2 inches) Eryops Tooth: 1/4 inch Another jaw fragment - 1/2 inch An unknown tooth: 1/8 inch Orthocanthus shark tooth (Fresh water shark - there were HUNDREDS if not thousands of these teeth, but rarely do you find a complete one. Some were big, almost an inch, but this one was 1/4 inch) The blue color is amazing Some awesome little amphibian tooth plates, all around 1 inch This one has little teeth that look like hersheys kisses! smaller one - 1/2 inch my best vertebra (found about 4 but most were crunchy). 3/4 inch A lungfish tooth 1/2 inch Lots of other bits and pieces of bones and spines: This is a Dimetrodon sail spine fragment. Some of the others found even better bits. 1/2 inch Edaphosaurus spine spur (a different type of Dimetrodon). Size 1 inch I can't wait to go back out again - I hope to find a Dimetrodon claw (a couple of the group did). Next time!!
  18. 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 notice a conical/round depression in the base. This is unlikely to be from another Sphenacodontid based on the locality, presence of serrations, and enamel ornamentation. https://www.nature.com/articles/ncomms4269 Notes: This tooth is a post-canine/posterior tooth, which is the tooth position one is more likely to find in micromatrix since they are smaller.
  19. Le Quoc

    Pelycosaur material need help

    I got these material from one seller. The information that I have is these all come from Oklahoma, USA. I have separate and glue some. I put them in 2 group that which have spike and which doesn’t have. It very pleasure that you could help me to ID them! Thanks! First group Second group
  20. 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 Brink and Reisz (2014), I'd posit that D. grandis is a suitable candidate. I'm also not an expert, so I welcome contrarian arguments. I highly doubt it's Therapsid, as I haven't heard of any from the Waurika locality. D. grandis:
  21. 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 crown is very broad (indicating it's likely a posterior, in addition to its size), it has fine serrations that differ in shape from the sharks', and the base doesn't flare out. Were this crown complete, you'd also notice a conical/rounded depression in the base. A beautiful tooth from one of our surprisingly close cousins.
  22. 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
  23. ThePhysicist

    Dimetrodon spine

    From the album: Permian

    Spine section from Dimetrodon sp. (limbatus?).
  24. dinodigger

    Dimetrodon vertebra

    It's been a long time since I shared some finds- this is a really nice Dimetrodon caudal (tail) vertebra from a medium size ddon. The short, blade-like neural spine is the tell for position. Newest project for us is prepping a 12 foot by 6 foot block containing remains of at least 6 Dimetrodons. Hoping to get it into the lab by April... will start posting photos soon. Best, Chris
  25. paleo.nath

    Dimetrodon tooth?

    I’ve just found this tooth in some Permian micro matrix from the Wellington formation, it is serrated and around a centimeter long. I’m thinking It’s dimetrodon or some sort of other basal synapsid
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