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Found 30 results

  1. it seems to be much more basal, but the news keeps saying close relative of t-rex like its a much more derived member of the group
  2. Theropods

    I decided to expand my obsession with sharks towards an obsession with theropods. I received my first piece today, a Spinosaur from Morocco, even making a display resembling the rolling deserts of the Sahara for it. This thread will be updated when any further theropod teeth arrive
  3. Gorgosaurus libratus

    I have here a Tyrannosaurid tooth identified as Gorgosaurus libratus. It's 3/4" and the provenance is Montana. I'm wondering if the Gorgosaurus claim appears to be accurate. Thank you, Bellamy
  4. Dinos & More Dinos

    Just wanted to post some of my favourites from the last few months of collecting. Winter is only a few short months away so I’m heading to the field whenever I can. We’ve got some tyrannosaurid (gorgosaurus or daspletosaurus) toe bones as of this morning! Very excited about that. Bunch of verts including a big one, I know most of the verts aren’t from the same animal but I like to set them up like a tail for visitors The ornithomimid claw, a few tyrannosaurid teeth, croc scute & skull section (I believe that vert belongs to a croc as well, the one before the string) little theropod limb bone and the longer one under the claw I believe is ornithomimid as well as it was close to the claw. Maybe a radius or ulna? Also putting some photos of my friend & I out in the area and the landscape itself. Enjoy!
  5. Theropod tooth from Judith River Fm.

    Hello everybody So I got this small tooth from Hill County, Montana, Judith River Formation, labeled as a Theropod indet. tooth. Length is just around 0.5 inches. CM as seen in the pictures. Any hope for an ID beyond Theropod indet? Thx!
  6. Bonebed

    Got access to some more private land near Dinosaur PP, company owned. My friend was familiar with this area since he was a kid so he said we should check it out, and we found some awesome dinosaur fossils! So far nothing was collected, but yesterday I got ahold of the land supervisor for the company and after receiving some paperwork coming my way on Monday I will be permitted to surface collect anything I find in this area, so this thread will be updated with more finds this coming week. Here are some photos of what we found so far: A lot of the bones looked like they were from a hadrosaur, sort of confirmed when I found this hadrosaur tooth. However there were two partial tyrannosaurid teeth nearby as well...maybe the hadrosaur got munched on... Limb bone (?) with multiple vertebrae nearby. I set them next to the large bone for the photo. Another vert, this one is in the ground so unfortunately I can’t do anything with it. Many, many bones were scattered around the area. Much more photos to come...very excited about collecting here!!
  7. Hi all, I recently acquired this Theropod indet. tooth speculating it might be a Dromaeosaurus albertensis. It was found in the Judith River Fm., is 0.72 inch long and serration count over 5mm is 20 mesial and 18 distal. It is a very stout tooth, so might as well be a Tyrannosaurid. It has a twist in the mesial carina and though denticles are very close in width, mesial ones are shorter, and the shape of denticles does not look classic Tyrannosaurid to me. I would like hear your opinions please.
  8. Hey guys, this tooth was listed as a dinosaur tooth(tyrannosaurid), does anyone know what this belonged to?
  9. Hi all, I have been staring at this tooth for quite a while now with question marks in my head. It was found in the Bissekty Formation, Kyzylkum desert, Uzbekistan. It's 27mm long (1.01 inch) and properly labeled as Theropod indet. However, the seller raises the possibility of it being a Dromaeosaurid. Serrations do look different in length and width, a count on screen gives me distal 13/5mm and mesial 16/5mm. What throws me off is the rather 'stout' crown and round cross section, more Tyrannosaurid in my view. However, I have no reference images and the only publication I found (Sues and Averianov 2014) is not exactly helpful. I posted available images - I could contact the seller if additional information is required. Any input is highly appreciated.
  10. Tyrannosaurid Indet Confirmation

    Hello all, Recently acquired 2 teeth, found and sold together, that I would love some insight and second opinions on. Both teeth are described as Tyrannosaurid Indet, from the Judith River Formation. The seller described that he purchased them both together from the harvester, but due to the fact he was not the original collector, the information is isolated to the above information. Smaller tooth is 15/16" long, dark chocolate color, and 1/4" wide. Serrations are present on front and rear edges, with serrations starting midway on the front edge. Larger tooth is missing the front edge, appears sheared. Length is 1 1/8", width 5/16". Serrations present cleanly on rear edge, but again completely sheared from front edge. Color also deeper chocolate brown, but more horizontal banding. Can obtain more detailed and specific measurements of other needed dimensions if needed. Mainly I'm looking for a confirmation of Tyrannosaurid Indet distinguished from other theropods in the area at the time, as I have little experience positively IDing smaller tyrannosaurid material. I've actively worked on distinguishing Carcharodontosaur teeth from Rugops in the field in Morocco, but this is out of my field. All help is greatly appreciated! Will post more pictures in comments
  11. Today is my last day off before I go back to work and I was supposed to spend the day making fossil starter kits. I have a cold though and I do not want the kids to think that 12 million year old shark teeth gave them a cold lol I am pretty bored so I thought I would post about our Judith River dinosaur fossils and how we are going to get discuss this formation. I am really surprised how much I am enjoying learning about these dinosaurs and this will be a formation that we spend a good bit of time on. It must have had some very productive ecosystems and there is a great diversity here to discuss. The kids will also get to see some familiar dinosaur families while learning about species that are new to them. I think during adaptation related presentations, this formation lets us get into ecological niches and discuss how two Tyrannosaurids existed as did at least two species of Dromaeosaurids and a Troodonitd plus other predators including non dinos. That is a lot of hungry mouths so niche selection and adaptations become very important. THere is also a great diversity of herbivores in this formation. I love the Ceratopsians from this formation and the diversity gives my son a lot of artistic options. We currently have one tooth but by the time we present we will have a couple more I think. This allows us to present a few species and say the teeth are not diagnostic so the teeth could have belonged to one or more really cool looking horned dinosaurs. This also gives the kids knowledge that there other Ceratopsians besides Triceratops. This will also be the point where we introduce Dromaeosaurids. Raptors are just iconic and this formation gives us the chance to really hit on adaptations. We have a Saurornitholestes tooth and will soon have a Dormaeosaurid caudal vertebra. While not assigned specifically to Dromaeosaurus, the vert will presented that way so we can talk about the differences between the two raptors. Of particular interest is the larger skull, more robust teeth, and specific wear patterns on the teeth of Dromaeosaurus. We will also have a small tooth tip from a Tyrannosaur indet. The kids will love learning about other Tyrannosaurids and I will leave it to the kids to imagine which one it belonged to. The real owner of the tooth is not important. That two existed in this formation is what is important. They must have occupied different niches plus a lot of kids may think T-Rex was the only member of that family. The last fossil I know we will have from Judith River is one of my favorites. It is an Ankylosaurus tooth and thanks to some help from TFF members, I spotted this among a few Nodosaur teeth. In our inventory, this is Ankylosaurus indet. However, in every single dinosaur presentation we do this will be Zuul and it will be a rock star. We want the kids to understand that there are many new discoveries being made and there will be a lot of new dinosaur discoveries made by THEIR generation. Everything about Zuul will be cool to kids. It is the one of the most incredible fossils ever found, armored dinosaurs are just cool, and it even has a pop culture name that a lot of kids will recognize from Ghostbusters lol Only 5 fossils but we can do A LOT of quality education with these fossils. I also have a very clear idea of the next items to find from Judith River. #1 on that list is a Dromaeosaurus tooth. A tooth gives us the perfect way of illustrating the difference between the raptors. We have two more purchases to complete before I buy again so I will save up and in the spring I start searching for that tooth. I also would love to add a hadrosaur bone from this formation and eventually I will track down a frill piece. Anyway, here a couple of the fossils... Pic 1- our Saurornitholestes tooth. Not a great picture but a really nice tooth. Pic 2- the Dormaeosaurid indet vert. Not here yet but will be right around my B-day. Pic 3- the Anky tooth. It is just a cool tooth and Zuul is a great dinosaur to teach kids about so Zuul is what this tooth is for Fossils on Wheels. Our only fossil from an armored dinosaur.
  12. Nanotyrannus?

    I've been looking at this tooth labeled Nanotyrannus from the Lance Formation in Wyoming (scale is in cm) . Now, the photos aren't great but I'm sort of wondering if it really is Nanotyrannus. It isn't quite as rectangular as other nano teeth I've seen (though I'll readily admit that I haven't seen a lot) and seems less curved. Any thoughts?
  13. Tyrannosaurid Tooth ID

    Howdy, folks! So just thought I'd pop a thread up for a partial tooth in my collection. It was originally sold as "unknown - possible croc tooth" when I purchased it. I tried getting an ID on it a couple of years ago, but the lighting in the photos made serrations hard to see, and it was tough to distinguish small details.... So here's attempt #2 (with better pics)! Any confirmation of ID mucho appreciated. Locality: Hell Creek, USA (afraid exact location is unknown) Mesial view?: Distal view?: Cross section: Closer look at denticles:
  14. Tyrannosaurid indet.

    From the album My Collection

    Tyrannosaurid indet. (Likely Daspletosaurus horneri or Gorgosaurus sp.) Two Medicine Formation Browning, Montana
  15. My June expedition was super fun and interesting to see what I could find. I have lots of unknowns and lots of fossil material that others will be able to help id. Thanks in advance for all those that join the discussion and help me figure out my library of dinosaur fossils.
  16. Hello everyone. I saw this nice Albertosaurus tooth fragment online being sold for relatively cheap. I thought it had nice size,serrations and tip. It is from the Judith formation in Montana. Do you think it is worth considering? Or do you think I should keep my money. If I could get it a bit repaired and nicely reglue the fragments,It could be quite neat I think. It would be my first Tyrannosaurid in my collection (and my only for a long time). What do you think? Here are the 3 pictures I have. Thanks alot,Regards
  17. Tyrannosaurid Tooth?

    Hi folks! Thought I might try leaning on the expertise of the forum gurus - I've owned this tooth for a few years and would like to hear any opinions of what the specimen should be classed as. It was sold as Daspletosaurus Torosus, but I'm aware of how hard it can be to label Tyrannosaur teeth (or just leave them as 'indet'). The tooth originated from Alberta, Canada. As it isn't the clearest to see, the denticles (which are very fine and equal in size on both sides) on the anterior edge curve off to the right (viewing the tooth face on), whilst the posterior serrated line is straight. PS: Apologies for the quality of photos too...my phone doesn't enjoy photographing anything magnified.
  18. Wear facets, spalling and split carinae are typical features you see on Tyrannosaurid teeth that add character and mystery to these teeth. Here are two papers that examine these features. Wear Facets Lambe (1917) noted wear surfaces on the side faces of tyrannosaurid lateral teeth from the Red Deer River deposits of western Canada. He wrote “as the upper teeth closed outside those of the mandible any wear, not on the point, would result from the contact of the inner surface of the upper teeth with the outer surface of the lower ones.” Recent work, has, however, challenged this assertion, suggesting that the shapes, locations, and incidences of tyrannosaurid wear surfaces are not indicative of tooth−tooth contact (Farlow and Brinkman 1994; Molnar 1998; Jacobsen 1996, 2003). Here the paper reevaluates this evidence by examining wearstriations in tyrannosaurid lateral teeth in addition to the shapes and locations of their wear surfaces. Wear facets and enamel spalling in tyrannosaurid dinosaurs Blaine W. Schubert and Peter S. Ungar Acta Palaeontologica Polonica 50 (1), 2005: 93-99 app50-093.pdf Split Carina 11% of the teeth studied in the paper exhibited this trait. Trauma, aberrant tooth replacement, or genetic factors may have led to the development of split carinae. The paper concluded that although not conclusive genetic factors get the most support but additional study is needed. Other factors like nutrition may play a part but the paper points out is not testable. Pay walled Split Carinae on Tyrannosaurid Teeth and Implications of Their Development Gregory M. Erickson Pages 268-274 | Received 14 Jun 1993, Accepted 17 Jan 1994, Published online: 24 Aug 2 https://doi.org/10.1080/02724634.1995.10011229 From my collection
  19. 3.75" tyrannosaurid tooth. Indet.?

    Fossil tyrannosaurid tooth found last weekend. 2nd largest one I have found and largest in the area by at least an inch. Formation is belly river group. I believe i is out of dinosaur park formation layers and possibly mix of oldman and foremost formations. I'm thinking gorgosaurus or daspletosaurus???
  20. Tyrannosaurid Bone from Delaware

    A new unrecognized metartarsal from a tyrannosaurid in Delaware is discussed in this paper. It increases the diversity of tyrannosaurids in Appalachia which previously included, Appalachiosaurus montgomeriensis and Dryptosaurus aquilunguis. Fitting for our first state. Brownstein CD. (2017) A tyrannosauroid metatarsus from the Merchantville formation of Delaware increases the diversity of non-tyrannosaurid tyrannosauroids on Appalachia. PeerJ 5:e4123 https://doi.org/10.7717/peerj.4123
  21. Texas Teeth

    Here's some of my best Texas teeth. All personal finds except for the partial Tyrannosaurid tooth. The little red tooth on the bottom is also Mosasaur.
  22. Chiropractor discovers BC's first dino skull. Looks like a Tyrannosaurid. Pretty good find while on holiday http://www.cbc.ca/amp/1.4158748
  23. Interesting paper that supports reptilian looking tyrannosaurids From Abstract Recent evidence for feathers in theropods has led to speculations that the largest tyrannosaurids, including Tyrannosaurus rex, were extensively feathered. We describe fossil integument from Tyrannosaurus and other tyrannosaurids (Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus), confirming that these large-bodied forms possessed scaly, reptilian-like skin. Body size evolution in tyrannosauroids reveals two independent occurrences of gigantism; specifically, the large sizes in Yutyrannus and tyrannosaurids were independently derived. These new findings demonstrate that extensive feather coverings observed in some early tyrannosauroids were lost by the Albian, basal to Tyrannosauridae. This loss is unrelated to palaeoclimate but possibly tied to the evolution of gigantism, although other mechanisms exist. http://rsbl.royalsocietypublishing.org/content/13/6/20170092
  24. Tyrannosaurus sp?

    Tyrannosaurus sp? from West Texas. No restoration or repair. 1 1/2".
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