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  1. ThePhysicist

    Juvenile T. rex tooth

    From the album: Hell Creek / Lance Formations

    Interesting blue color near the base, and some feeding wear at the tip of this immature Tyrannosaurid tooth.
  2. Hello, I was doing a study on the T. rex and Nanotyrannus teeth specimens I had, and I wanted to compare them against a list of known T. rex teeth with measurement. The paper: Dental Morphology and Variation in Theropod Dinosaurs: Implications for the Taxonomic Identification of Isolated Teeth (JOSHUA B. SMITH, DAVID R. VANN, AND PETER DODSON) contains a list of 115 T. rex teeth. To make it easier to compare and read the data, I combined the measurements into a single chart, added colors and lines for ease of reading, and added the size and names of the T. rex used in the study Fee
  3. Dino Dad 81

    T Rex tooth

    Cracking open Heterodonty in T Rex for Joseph's tooth was fun enough that I wanted to take a look at this tooth and see if you have any suspicions on position @Troodon. From the Lance formation in Weston, WY CH: About 45-46mm CBL: 21.4mm CBW: 15.5mm Mesial Serration Density: 1.8/mm Distal Serration Density: 1.9/mm Thanks!!
  4. Ginger0412

    Is this a tyrannosaur tooth?

    Is this a tyrannosaur tooth? Origin: Drumheller, Alberta, Canada size 55mm Also, is this tooth from an adult?
  5. karelchytil

    Tyrannosaurus rex skeleton

    So after Tyrannosaurus Rex WIP thread, i have made some renders. ZBrush screen In Houdini with Karma Please tell meif something is a ittle off, i will recreate it. My sculpting process:
  6. Are these real adult Tyrannosaurus teeth? Production area: Hell Creek I appreciate everyone's comments! thank you very much!
  7. Tidgy's Dad

    Dinosaur Vocalization.

    https://www.bbc.com/future/article/20221212-the-mysterious-song-of-the-dinosaurs
  8. Any ready to bid ? https://www.sothebys.com/en/buy/auction/2022/maximus-rex/tyrannosaurus-rex-skull (Hope its not old news and posted in the right place - New user still learning )
  9. ThePhysicist

    Tyrannosaurid premaxillary tooth

    "That some of these teeth are mammalian incisors there can be but little doubt..." - O. C. Marsh1 This kind of incisor-like ("incisiform") tooth was originally thought to have belonged to a large, Cretaceous mammal. Later discoveries revealed that these teeth were actually the front teeth ("premaxillary teeth") of Tyrannosaurs - and are now known as a hallmark of their clade, Tyrannosauroidea (along with fused nasals). Closely-spaced, parallel grooves on bones suggest that Tyrannosaurs used these teeth to selectively scrape meat from bone2. Identification Tyrannosaurid premaxil
  10. ThePhysicist

    Tyrannosaurid premaxillary tooth

    "That some of these teeth are mammalian incisors there can be but little doubt..." - O. C. Marsh1 This kind of incisor-like ("incisiform") tooth was originally thought to have belonged to a large, Cretaceous mammal. Later discoveries revealed that these teeth were actually the front teeth ("premaxillary teeth") of Tyrannosaurs - and are now known as a hallmark of their clade, Tyrannosauroidea (along with fused nasals). Closely-spaced, parallel grooves on bones suggest that Tyrannosaurs used these teeth to selectively scrape meat from bone2. Identification Tyrannosaurid premaxi
  11. ThePhysicist

    Tyrannosaur premaxillary tooth

    From the album: Hell Creek / Lance Formations

    This kind of incisor-like ("incisorform") tooth was originally thought to have belonged to a large, Cretaceous mammal. Later discoveries revealed that these teeth were actually the front teeth ("premaxillary teeth") of Tyrannosaurs - and are now known as a hallmark of their clade, Tyrannosauroidea. Closely-spaced, parallel grooves on bones suggest that Tyrannosaurs used these teeth to scrape meat from bone. Given the size, this is from a very young animal. Should Nanotyrannus be valid, then this should be considered an indeterminate Tyrannosaurid.
  12. ThePhysicist

    Tyrannosaur premaxillary tooth

    From the album: Hell Creek / Lance Formations

    This kind of incisor-like ("incisorform") tooth was originally thought to have belonged to a large, Cretaceous mammal. Later discoveries revealed that these teeth were actually the front teeth ("premaxillary teeth") of Tyrannosaurs - and are now known as a hallmark of their clade, Tyrannosauroidea. Closely-spaced, parallel grooves on bones suggest that Tyrannosaurs used these teeth to scrape meat from bone. Given the size, this is from a juvenile animal (smaller than "Jane"). Should Nanotyrannus be valid, then this should be considered an indeterminate Tyrannosaurid.
  13. There's a new documentary about dinosaurs (Prehistoric Planet). In this documentary we see a lot of dinosaurs and their appearance is quite different from movies (JW series) one of the most interesting is the Tyrannosaurus rex. This is because The T.rex had lips instead of showing cusps of their maxilla teeth. Actually, I really like the new look. It looks more like an animal than a monster from movies, but i'm very curious why did T.rex have lips? what is their evidence? I'm more interested in the basis for their idea. Does anyone know which paper has mentioned or discu
  14. Hi, Dear guys. I had a question about T.rex teeth I'm very confused by this question and hope to get an answer. we knew a T.rex‘s dentary tooth that will have a pinch in one side with the tongue. how about a maxilla tooth that will also have a pinch on one side? I guess that answer is not. And about another question: There is a tooth available online. Is it a dentary/maxilla tooth? and why. Please. From Weston County, Wyoming, United States 7¼ inches (18.5 cm) in length. Thanks guys for the help. Have a nice day. from Chris
  15. AranHao

    nano

    This tooth has always been described as nano . but I found that the both sides of the crown were not pinched, the base of the tooth was obviously pinched on the tongue side, and the other side (lip side) did not seem to be pinched. There is a little root on the tooth bottom (the pinch on both sides of the nano is for the crown?) The mesial ridge extends to 2/3 of the crown the fossil from powder county HCFM CH:5cm CBL:2cm CBW:1.2cm DC:2.5/mm Any insight on this would be greatly appreciated
  16. ThePhysicist

    T. rex tooth

    From the album: Hell Creek / Lance Formations

    It's remarkable that the minute features of this tooth can be preserved with such clarity after 66 million years!
  17. ThePhysicist

    Tyrannosaurid vs Dromaeosaurid

    From the album: Hell Creek / Lance Formations

    As a theropod tooth aficionado, I thought it useful to compare two families present in the Hell Creek Formation. They become increasingly difficult to distinguish as they get smaller, but this graphic presents some features which may be used to differentiate them on two similarly-sized exceptional specimens. Keep in mind there is some variability due to position, ontogeny, etc., so it's beneficial to study more than one tooth for each family.
  18. ThePhysicist

    Worn T. rex tooth (annotated)

    From the album: Hell Creek / Lance Formations

    Not the prettiest tooth, but I very much enjoy fossils like this that demonstrate behavior and tell a story. T. rex and other Tyrannosaurs were unusual among theropods in that they consumed the entire carcass of an animal - bones and all. Most theropod dinosaurs have ziphodont teeth, thin and knife-like, good for cutting muscle from bone. The thick and robust teeth of adult Tyrannosaurs, coupled with their incredible bite force, allowed them to shatter and pulverize bone - even those of the large, formidable herbivores they hunted. Despite the robustness of their teeth, Tyrannosaur
  19. ThePhysicist

    Worn T. rex tooth

    From the album: Hell Creek / Lance Formations

    Not the prettiest tooth, but I very much enjoy fossils like this that demonstrate behavior and tell a story. T. rex and other Tyrannosaurs were unusual among theropods in that they consumed the entire carcass of an animal - bones and all. Most theropod dinosaurs have ziphodont teeth, thin and knife-like, good for cutting muscle from bone. The thick and robust teeth of adult Tyrannosaurs, coupled with their incredible bite force, allowed them to shatter and pulverize bone - even those of the large, formidable herbivores they hunted. Despite the robustness of their teeth, Tyrannosaur
  20. Mrhenky3

    Nanotyrannus or other?

    I've recently aquired this Tyrannosaurid tooth from a local shop. The shop sold it as Nanotyrannus lancensis. I think the tip has been repaired, but not quite sure that it is worn or repaired. However the tooth does not show the indents on the bottom, which is sometimes to be expected on Nanotyrannus I heard. I was wondering if somebody could take another look for me and share their opinion, about what species this tooth belonged to. Thanks in advance. The tooth was found in the Hell Creek Formation in Montana
  21. Hello all, looking to get some opinions. 5-6 years ago I came across a ton of fragmented bones while scouting out a new collecting site. One of the first things that really caught my eye was this, lets call it a "claw". Like I said this was among a ton of shattered bone so it kind of stood out right away. I followed the bone fragments more up a very steep hill that turns into a cliff. This led me probably 50-75 feet from the initial sighting of bone to a place that was dangerously steep, but I could see more bone weathering out of the hill. It was in very bad shape
  22. ThePhysicist

    Tyrannosaur dental ontogeny?

    From the album: Hell Creek / Lance Formations

    It's interesting to compare differently-sized teeth of similar positions. These might represent ontogeny or other dental variation (due to multiple species, etc.).
  23. ThePhysicist

    Tyrannosaur dental ontogeny?

    From the album: Hell Creek / Lance Formations

    It's interesting to compare differently-sized teeth of similar positions. These might represent ontogeny or other dental variation (due to multiple species, etc.).
  24. ThePhysicist

    Juvenile T. rex tooth

    From the album: Hell Creek / Lance Formations

    A young T. rex tooth. The preservation of the enamel is fantastic, and I like the dark hues. The serrations are also in great shape. There is some minor feeding wear on the tip.
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