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  1. I saw a tooth of an Tyrannosaurid Indet. The price looks good and the size is 3.3 inches including the repaired lower end. The seller told that this is from Judith River Formation, Northern Montana, and No restoration. Can anyone find any evidence of restoration? I can't find any... And.. this is another one from the same seller. This is also Tyrannosaurid indet, and from JRF.
  2. Hi all, I could not resist and took another shot on my quest to obtain a Dakotaraptor tooth. Here the tooth in question this time: It was found in the Hell Creek Formation, Garfield County. Measurements are: CH 1,41 cm - CBL 0,68 cm - CBW 0,3 cm - denticles per 5mm are 22 mesial and 19 distal. Note the slight tilt of the denticles towards the tip of the tooth. It's the best fit I have found so far, what deviates from the dePalma description is the shape of the base, it has a pinch, but I would not consider it rectangular. As a side note, it looks exactly like the base of Acheroraptor
  3. Two Tyrannosaurid teeth that I ordered early this week has arrived. This is the first tooth that I want to show, which is a tooth of a juvenile Tyrannosaurus rex (or Nanotyrannus). Since I personally believe that the Nanotyrannus is an invalid genus, I think this is a juvenile Tyrannosaurus rex tooth. For those who do not agree, this is a Nanotyrannus tooth. This tooth is from Hell Creek formation of Garfield Co. Montana. This is an 1-3/8 inch, and has some chips and scratches at the labial side, but I think this is still a great tooth.
  4. Updated May 24, 2021 Collectors, online sellers and some dealers periodically ask me to help them in the identification of tyrannosaur type teeth. So I thought I would put together a guide from North America to help in identification. The following is the current understanding of Tyrannosauridae species described/known in North America with the stratigraphic unit where they are found. If I missed any let me know. Albertosaurus sarcophagus : Horseshoe Canyon Formation Gorgosaurus libratus : Dinosaur Park Formation Gorgosaurus sp. or cf Gorgo
  5. TOM BUCKLEY

    @troodon post

    A couple of days ago there was a thread that provided links to @Troodon 's id posts about identifying tyrannosaurid teeth. I didn't bookmark them and can't locate them. Any guidance would be appreciated. Thanks.
  6. 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
  7. BellamyBlake

    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
  8. BellamyBlake

    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
  9. musicnfossils

    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 th
  10. Abstraktum

    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!
  11. musicnfossils

    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
  12. 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.
  13. Hey guys, this tooth was listed as a dinosaur tooth(tyrannosaurid), does anyone know what this belonged to?
  14. 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
  15. kinnza1

    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.
  16. 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 h
  17. Wightlight

    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?
  18. 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
  19. Omnomosaurus

    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?:
  20. Jaimin013

    Tyrannosaurid indet.

    From the album: My Collection

    Tyrannosaurid indet. (Likely Daspletosaurus horneri or Gorgosaurus sp.) Two Medicine Formation Browning, Montana
  21. LordTrilobite

    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.
  22. 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.
  23. 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, chall
  24. Troodon

    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
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