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  1. Hello everyone! Just a question, whats the best way to diffrentiate the tooth morphology between megalosaurids and tyrannosaurids?
  2. Hello all, I’ve had this tyrannosaur tooth for a little while now, but haven’t been able to narrow down a species. I’m curious if it is possible to ID it any further. Would love to learn more. It was found in the Judith River Formation (Hill County, MT), and is ~13.5mm. Thank you all for your help in advance!
  3. jikohr

    Rex, Nano, or Indet.?

    Hi Everyone! I picked up this piece on my recent trip to Tucson. It's definitely Tyrannosaur from Hell Creek (Garfield County, Montana) the question of course is what would be the proper label for it. The size and thickness makes juvie rex tempting but the base is too damaged to see if there's a pinch and I've seen Nanos this size before. Both I and the seller were thinking indet. Tyrannosaur while discussing the tooth, but I figured it couldn't hurt to post it here in case anyone sees something we missed. CH: 36.8 mm CBW: 9.88 mm CBL: Hard to measure since there's a piece missing but it's 12.4 mm with damage and probably 15-16 mm if undamaged. Any insight is appreciated as always!
  4. ThePhysicist

    Juvenile T. rex

    From the album: Hell Creek / Lance Formations

    Tyrannosaurus rex Hell Creek Fm., Garfield Co., MT, USA This is from the right maxilla of a juvenile individual (note the lingual wear). Art by RJ Palmer
  5. TheropodGuy

    Tyrannosaur tooth?

    Hello,I am new to this forum. I recently acquired this tooth not that long ago,I was hoping it would be a Tyrannosaurid.Then I started to have some doubts looking at other papers.I understand you can’t identify Tyrannosaur Campanian teeth further down to Gorgosaurus, Daspletosaurus, and etc. at this size. I just hope to find out if it is a Tyrannosaurid or some other group of theropods like Dromeosaurs. My original idea is that it was too large to be a Dromeosaur from this formation. So I went with the Tyrannosaur ID but I have doubts. Info: Tyrannosaur tooth? with a partial Hadrosaur tooth Location:Judith River Formation, Hill County, Montana “1.05” inches long. There seems to be no Mesial serrations or they are worn down. Thanks for the help. I’ll of course add more photos if needed!😊
  6. AranHao

    Tyrannosaur vertebra?

    Hello May I know if this is the vertebrae of the tyrannosaur? And is this the tailbone? It comes from the Jordan, Garfield County, Montana size: 3.35 x 3.2 x 1.5" Thanks IMG_6739.HEIC IMG_6737.HEIC IMG_6738.HEIC
  7. Toast123

    Baby T. Rex or Nanotyrannus?

    Location: Hell Creek formation, Carter county Very small tooth so it was pretty hard to get good and clear photos. I’ll try to add some better ones later today. I have two confirmed Nano teeth I used as a comparison, they both look more slender than this one, but I’m not sure.
  8. Howdy all. I've discussed the relationships between Nanotyrannus and Appalachiosaurus to albertosaurines and to eachother before, and today I'm wondering if relationships could be determined by the shape of their teeth. Comparing the teeth of nanotyrannus and appalachiosaurus, they are very similar to eachother, almost identical. They are also relatively similar to the teeth of gorgosaurus, though not as much. I believe it's already been established that these animals are relatively closely related, but I think this to be extra evidence to the case. (These fossils are not mine)
  9. Myryad

    tyrannosaur, shark or other?

    hello. on a website i use to buy fossils from some seller posted this tooth and claims to be a tyrannosaur tooth. on reddit some people said it might be shark but other user told me to ask here as it might be some kind of troodon tooth. could you please help me id it and make an idea of the value if i want to buy it? thanks beforehand
  10. JorisVV

    Canadian Tyrannosauridae

    So i recently aquired this little Tyrannosauridae tooth. Near Red deer river Oldman Formation Belly river group Southern Alberta, Canada I think we can conclude it at Indeterminate Tyrannosaur tooth? Opinions?
  11. Gorgosaurus sp. (libratus?) partial femur (Lambe, 1914) Tyrannosaurid theropod Family: Tyrannosauridae Subfamily: Albertosaurinae Genus: Gorgosaurus (Lambe, 1914) Labelled as being a partial femur (thigh, upper leg). Late Cretaceous (Campanian), 75.1 – 76.6 Ma Red Deer River Valley, Nr. Drumheller, Alberta, Canada. Unboxing my old collection that has been in storage for years and forgot that I had this (purchased August 1988) – labelled as being a Gorgosaurus sp.partial femur. I am assuming that the groove was for a tendon or blood vessel? It appears that fossilised / mineralised spongiform material is visible in the cross-section at one end – might this be fossilised / mineralised bone marrow or spongy (cancellous) bone? Areas of mineralised bone surface also appears to be present. Research suggests that it is likely from the Dinosaur Park Formation which is especially prolific in dinosaur remains and well exposed in the badlands which flank the Red Deer River.
  12. Not educated enough on JRF, Montana for now. But I was wondering what Tyrannosaurids are found there. Especially at hill county. Are they identifiable? I got pictures. But rather share them privately. It's of a 3 inch tooth.
  13. svcgoat

    Judith River Channel Deposit #1

    Started going through some of a Judith River Channel Deposit that I received here are somethings I am not 100% sure of. 1. Tyrannosaur Tooth Shard?
  14. patrickhudson

    tyrannosaur skull

    A little art project I’m working on. The teeth are all real, no restorations - all found by myself and my daughter. I get that the teeth aren’t t-rex but I just liked the skull replica (bought online). I also get that the teeth aren’t necessarily in the right position or arch, but I figured 99.999%of people would never know. The original skull had horrible looking teeth before I broke them all out Feel free to tell me what’s blatantly wrong and I can fix it, or replace with other teeth I’ve got. Next up is working on a frame to hang it in. I was thinking a sheet metal backing with a wood frame and some led lights behind the skull? Any thoughts or ideas in a display? thanks
  15. Daze

    Tyrannosaurus Rex Tooth?

    Hi, according to the seller this is a 2 inch Tyrannosaurus Rex tooth from the Hell Creek Formation, Harding County, South Dakota. Really interested in your opinions, thanks.
  16. Hello I would like to ask opinions about this theropod tooth fossil. The seller says that this tooth is from Aguja Formation and this tooth could be Teratophoneus's tooth. I am not sure whether this is true so if anyone has opinion about this tooth, I would be glad to hear it!
  17. Just received a fragment (Maxilla or Jaw) with 4 broken teeth (root only) and one complete new one from Zhucheng, China Wonder if it’s Zhuchengtyrannus or Tarbo But I believe it’s hard to identify:(
  18. ThePhysicist

    Juvenile Tyrannosaurus rex Tooth

    Identification Though smaller than many imagine T. rex teeth to be, this is indisputably one. It is characteristically robust, and has chisel-shaped denticles with similar denticle densities on each carina.1 Those qualities support its identification as a Tyrannosaurid, and with the locality information confirming it originated from the Hell Creek formation, this must be T. rex. Comments Like most isolated theropod teeth, this is a shed tooth, likely lost during feeding.2 This specimen has exquisite preservation with the enamel texture sharply retained as in life. It however has minor weathering with possible feeding wear at the tip, light root etching, and the base of the tooth has been lightly smoothed possibly by tumbling in an ancient river (enamel is harder so it wouldn't have weathered as much as other portions of the tooth). References 1. Smith, Joshua B. “Heterodonty in Tyrannosaurus Rex: Implications for the Taxonomic and Systematic Utility of Theropod Dentitions.” Journal of Vertebrate Paleontology, vol. 25, no. 4, 2005, pp. 865–87. JSTOR, http://www.jstor.org/stable/4524513. 2. Fiorillo, Anthony R., and Philip J. Currie. “Theropod Teeth from the Judith River Formation (Upper Cretaceous) of South-Central Montana.” Journal of Vertebrate Paleontology, vol. 14, no. 1, 1994, pp. 74–80. JSTOR, http://www.jstor.org/stable/4523546.
  19. musicnfossils

    Tooth Tuesday

    Should probably post more in this forum section since we’re doing multiple hikes a week but here’s a couple cool finds from today out in the dinosaur park formation. The wildfires here in Alberta have been raging wild, the smoke finally made it this far south. Here’s a couple nice tyrannosaur teeth, thankfully we found the big one when we did, would have exploded soon. It’s probably around 2.5 inches haven’t measured it yet.
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