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Found 57 results

  1. Dinosaur bone

    Arm or leg bone of a small theropod dinosaur.
  2. I have a 3/8" premax theropod tooth from the Hell Creek formation in Montana, Carter County. Anyone have any ideas whether this is dromaeosaur or tyrannosaur? I know most of the tyrannosaur premax teeth like this do not have serrations, but there are always exceptions. 19 serrations per 5mm.
  3. Hi everyone! I have another puzzle for you all! I REALLY appreciate your help identifying these bones, and even though I may never know what they really came from it is so interesting to propose and discuss possibilities. The majority of the bones I found this summer (in Montana) were really odd and hard to identify... They all came from roughly the same 5'x5' spot in the same formation. Anyways, this one is no doubt theropod. It's beautiful with awesome preservation aside from the whole 'missing an entire side' thing. Hopefully you can help me out! Thanks so much! More to come... ☺️ -Lauren P.S. Sorry for the white spots. Had to put it back together and haven't painted yet.
  4. I have heard that dinosaur bones are different in structure. I have some questions. Are all theropod bones hollow including sauropods? And are all ornithischian bones more solid? And can that be tell from a small fragment of bone?
  5. Hi everyone, I have another bone I would love for you to identify if you can. I also found this one in Montana. It's definitely hollow and theropod. It looks like it has some kind of process along the side. It's not a concretion. What's really neat about the bone is that you can still see the struts inside. From what I understand, struts are structures found within pneumatic bones that allowed the bone to be lightweight while also creating pockets of air within the bone (air sacs) which essentially aided in respiration. (Please correct me if I'm wrong ). Birds still have these struts today; which is pretty incredible to think about... Anyways, please let me know what you think this might come from! It's medium sized. Just over 8 inches long. Thank you!! -Lauren
  6. Started reconstructing a Scipionyx for 3d printing Skull complete Skull + Jaw complete Started working on the chest and arms, they are so very small ----- The skull and jaw are available for printing at full size here.
  7. I found this tooth a few years ago in Northeast Mississippi. It is most likely from the Demopolis Formation, which is a late Cretaceous marine lag deposit. I have found several mosasaur teeth here, thousands of shark and fish teeth, and 2 hadrosaur dino teeth. This particular tooth is almost 1.5cm in length, and is unfortunately split right down the middle of the tooth. The part of both sides that is remaining near the tooth makes it look like this was a skinny tooth, more like the shape of a theropod tooth, similar to Dryptosaurus. The recurve is also more theropod-like. The color and weathering is also similar to mosasaur teeth that I have found though, and I am just unsure of what to think about it. Theropod teeth have been found in this area, but they are incredibly rare, whereas, I have found several mosasaur teeth. Perhaps the cross-section of the break along the tooth might give a clue? Perhaps @Troodon knows. I am currently leanung towards it being a strange mosasaur tooth, but I would like other opinions. Northeast Mississippi Demopolis Formation Late Creataceous ~ 72 MYA This photo has a pencil tip for size reference.
  8. I bought this nice theropod tooth online and the seller told me that it was a Daspletosaurus from the Judith River Formation, Montana. While looking online for more info, I found a few people saying that some dealers lie about the genus of tyrannosaurid teeth (especially with Daspletosaurus) as they are hard to identify. Just wondering if anyone here can I.D. this tooth? Suggestions are much appreciated!
  9. I was given this as a gift. It is tentatively identified is a dinosaur digit bone. Possible theropod. Found on a private Ranch in the Hell Creek formation area of Montana. Can anyone give me any further identification information? Thank you
  10. Researchers at the China University of Geosciences discovered a semitranslucent mid-Cretaceous amber sample containing appendage covered in delicate feathers, thought to belong to a dinosaur that roamed the Earth more than 99 million years ago. The lead paleontologist Lida Xing commented that "this is the most impressive finding of my career to date". The study was funded in part by National Geographic and the Chinese University. The 1.4 inch amber sample was later analysed to gather more data using CT scans and Microscopic analysis which led to the revelation that the appendage consisted of eight vertebrae from the middle or end of a long, thin tail that may have been originally made up of more than 25 vertebrae (see below). Based on these findings the researchers believe that the tail belongs to a juvenile coelurosaur, part of a group of theropod dinosaurs that includes everything from tyrannosaurs to modern birds.
  11. Doing my usual sieving of material and came across what I believe to be another toe bone. The identification will be impossible to an actual described species, so I am looking for conformation that the bone fits into the general shape of a genre. I suspect it is either a bird or small theropod so will be going to the museum to live and be displayed. The specimen was found in the Marine Cretaceous deposits of Central Queensland Australia near Richmond, but I doubt it is marine. The specimen is 9 mm long x 4 mm wide. Thanks for all input in advance. Mike D'Arcy
  12. Hi all I have no clue about the owner of this tiny theropod tooth coming from Kem Kem basin (Morocco). To whom it may belong? Size: 1cm more or less. It appears that its shape is different from those identified as Carcharodontosaurus, but denticles are of similar size in both carinae, so it may not belong to dromaeosaurids. Abelisaurid perhaps? Thank you very much in advance
  13. Theropod Metatarsal

    Partial metatarsal (or metacarpal?) of a Theropod dinosaur. Posssibly from a Dromaeosaurid.
  14. I bought some new cool stuff at a local show. I only bought Moroccan material. A few Mosasaur pieces and stuff from Kem Kem. I've only started cleaning and will research them a bit more later. So I thought I'd share some pics first. I also got some new display items that will be nice to showcase some of my other stuff in. From left to right. Top: First there's a chuck with two roots and one tooth. There's also some bone fragments that look like they could be jaw pieces. Will be a fun prepping project. Then there's a Prognathodon tooth that isn't the prettiest but it's really big and it was cheap so I had to get it. And at the end there's a Plesiosaur vertebra with a partial neural arch that will be fun to clean. Bottom: On the left there's a neural arch from a Spinosaurid. I compared it to the recent reconstruction of Spinosaurus and it looks like it's a pretty close match with some of the first dorsal vertebrae. Middle top there's a small caudal vertebra. Middle bottom there's a fish jaw. And on the right from top to bottom. A possible distal femur. A metacarpal/tarsal? And a possible proximal tibia. All three are hollow and probably Theropod or bird. So I have some research and cleaning to do! Really big ugly Mosasaur tooth. Mosasaur tooth and jaw fragments. Fish jaw. Distal femur. It's very asymmetrical as well. Metacarpal or tarsal. The head is almost symmetrical but the shaft seems to be angled more. Spinosaur neural arch from a different angle. Roughly a dorsoposterior view. Since it's not very complete on one side this will make for a great piece to scan and digitally mirror so that I can recreate a bit of the missing pieces. So I'll be having fun with these pieces for a while.
  15. Here is the newest addition to my dinosaur fossil collection. I normally don't share my new additions, unless there is something that might interest other collectors to go along with the specimen. This is a right femur from Nanotyrannus lancensis. It was found by a rancher friend of mine, on a neighboring ranch in Custer County, Montana, Hell Creek Formation. It was prepped and identified by Neal Larson. I am in the camp that Nanotyrannus is a valid taxon, and I enjoy reading publications and watching documentaries that try to prove or disprove that it is. As I was reading an article called "The Case for Nanotyrannus" by Pete Larson, published in a book called Tyrannosaurid Paleobiology, I found an interesting table, pictured below. According to this table, Jane's femur, who Larson believes to be a Nanotyrannus, is 720mm, or 28 inches in length. In the National Geographic documentary, "Dino Death Match", Jane's femur was studied histologically at Oklahoma State University, and found to be that of a juvenile. Her corresponding tibia was found to be 31 inches in length. For comparisons sake, member Troodon kindly provided me with the measurements for the femur and tibia from the Nanotyrannus of the Dueling Dinos, believed to be an adult specimen. The measurements are as follows: femur is 760mm or 30 inches long, and the tibia is 863mm or 34 inches long. That being said. This little femur is 19 inches in length, making it a juvenile younger than Jane, and a little less than 2/3 the length of an adult. (under construction. More in a minute).
  16. Theropod tibia

    Partial tibia of a Theropod dinosaur. Seems very similar to both the tibia of raptors and that of Spinosaurs.
  17. Proper identification of Dinosaur Material with European auctions is typical of what you find in Domestic one. Here are comments on a few items being offered since a number of our members are attracted by their offerings. Here is a beautiful rooted Tyrannosaur tooth being offered. The description suggest it might be a Tyrannosaurus rex but states it there is no label. The preservation looks like a Tarbosaurus from Mongolia, not T rex. The other observation I would make is that there appears to be significant restoration to the lower half of the root which is not stated. A number of T rex teeth being offered appear to look more like Nanotyrannus not T rex. Use caution on all teeth. All of the teeth offered as Albertosaurus should be labeled has Tyrannosaurid indet. e A Triceratops horridus ungual being offered looks more like the hadrosaur Edmontosaurus. Numerous lots of items being offered are Triceratops horridus should be better identified has either Triceratops sp. or Ceratopsian indet. Quite a bit Moroccan Kem Kem material being offered, caution with all of it. The larger teeth are accurate but smaller Abelisaurid teeth are misidentified has Deltadromeus or Rugops. This Deltadromeus raptor claw may not even be Dinosaurian difficult to make that call. Isolated toe bones are hard to ID to a species especially . This one may be has listed Spinosaurus but a better call would be Theropod indet. Just exercise caution and if there are items you are interested in feel free to post them here for our input.
  18. Dinosaur Tail Vertebra

    A caudal vertebra of a small dinosaur. Probably Theropod, possibly from a raptor. The vertebra perticularly looks like a vertebra from the base of a Dromaeosaurid tail.
  19. Tyrannosaurid tooth

    Tooth of a Tyrannosaurid. This tooth belongs to either Albertosaurus, Gorgosaurus or Daspletosaurus. Note the wear facets on the top and medial side of the tooth.
  20. What theropod tooth is this ID ? it's from Morrison Formation Cowley , Big Horn County, Wyoming
  21. Dinosaur Tail Vertebra

    Caudal vertebra of a dinosaur. Most likely from a Theropod.
  22. Theropod Vertebra

    Cervical? vertebra of a theropod dinosaur (possibly Spinosaurid) with series of scratches on one side. It is likely that these scrathes are gnaw marks from different animals due to the different sizes of the marks.
  23. Deltadromeus vertebra

    Caudal vertebra of a theropod dinosaur.
  24. Spinosaur tooth

    A tooth of a Spinosaur.
  25. Spinosaur tooth

    A tooth of a Spinosaur.