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Showing results for tags 't rex'.
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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. -
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.-
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- nanotyrannus
- premaxillary tooth
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Hi All, I'm new to this forum and thought I'd send over images of my theropod teeth plus one extremely impressive sauropod from Madagascar. Hope you like them! Paul
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Hey all, This is an unusual ID post. It's actually of the first tooth I ever posted on TFF. Back then I was primarily confirming that it was in fact T Rex and trying to get some understanding of what damage to the tooth was likely to be antemortem/perimortem/postmortem. The tooth is from the Hell Creek in Powder River co, MO and it's about 3". When it was sold to me, the seller felt he was seeing enough antemortem/perimortem trauma that he thought it was safe to say this tooth had seen its share of combat. The most interesting new bit of info someone offered me was that
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Houston Museum of Natural Science + T. rex Victoria - July 2021
ThePhysicist posted a topic in A Trip to the Museum
I was in the area, so I made a very brief stop by the HMNS. I'll state up-front that this will be extremely dino-centric. What I saw was really great, they have a chronologically-organized display of animals from stromatolites to humans (I only made it to the Cretaceous). The lighting is very dramatic, so seeing it in person is much better than the dark photos portray (I did edit a few of them to enhance visibility). Lots of dynamic posing which is nice compared to other museums. Also, most specimens aren't behind glass, and you can get really close. I believe most of the skeleton- 11 replies
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- tyrannosaurus rex
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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 -
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 -
Hello! I saw this interesting tooth for sale and I’m on the fence about purchasing it. It’s a .66” Nanotyrannus tooth from Garfield county Montana. The tip is restored but that doesn’t bother me. I’m posting because the base seemed a lot thicker than a lot of nanno teeth I see, and I also couldn’t really tell if there was any of the typical “pinching” on the sides. I was hoping for help determining if this is a Nanotyrannus tooth, or possibly a T. rex. Thanks!
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Not really a lot of answers. From BBC News : https://www.bbc.com/news/science-environment-62088874
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- argentina
- meraxes gigas
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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
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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.). -
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.).-
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- tyrannosaur dental ontogeny
- young tyrannosaur
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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. -
From the album: Hell Creek / Lance Formations
For most collectors, it's more affordable to have a piece of a T. rex tooth if you just want it represented. This one is clearly T. rex: it's theropod with serrations (this one has the basalmost portion of the mesial carina), very thick, and clearly would've had a large circumference. Note also the large angle made by the curvature of the tooth at the carina (not Nanotyrannus which have narrow, blade-like teeth). -
From the album: Hell Creek / Lance Formations
Sold by the BHI as Nanotyrannus lancensis. However, given the uncertain status of Nanotyrannus' validity, I chose to label it as Tyrannosaurid for now. It is interesting to compare to my other small Tyrannosaur teeth of the same/similar position. The base is clearly more compressed than my baby rex tooth (which is also smaller). -
Hi all, Been trying to look for possible readings/ images of anterior dentary teeth of trex vs nano. Not sure if im finding it in the right place, but was wondering what a nano anterior dentary tooth would look like? As I dont think I have seen a nano anterior dentary tooth for sale, mostly rex for some reason. As i think those teeth look almost similar to a premax, though from what i remember, it would be highly unlikely to distinguish between a nano and rex premax unless the roots were still attached. Would you guys maybe know if there are any morpholoical difference
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From the album: Hell Creek / Lance Formations
Tyrannosauridae (Cf. Tyrannosaurus rex) Hell Creek Fm., Wibaux Co., MT, USA This minute tooth is indeed Tyrannosaur: the mc/dc serration densities are virtually identical, and the denticle shape is not like those of Dromaeosaurids. It also has a slight pathology near the tip. -
T-Rex Egg? Maybe? or Maybe not?
Scuby109 posted a topic in Is It Real? How to Recognize Fossil Fabrications
Is this a T Rex Egg Fossil? or just a really large 6 or so inch rock that looks like one? The guy selling this told me that before he removes anything from where he finds these, he gets local Paleontologists to check them out. Thoughts? -
Identification This is a classic T. rex tooth. It's clearly Tyrannosaurid by its robusticity, similar serration densities on each carina (mesial carina counted by the "roots" of the denticles as they are completely worn off), and chisel-shaped serrations. Those qualities with its locality and formation mean it must be the one and only. Notes The Crown Height Ratio (CHR) suggests a posterior position (it's short and stout). There's evidence of wear on the tip and mesial carina.
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Identification Tyrannosaur teeth characteristically have similar serration densities on each carina, with chisel-shaped denticles. Though small, this tooth matches those qualities, and doesn't resemble other smaller theropods like Dromaeosaurids. Identified as Cf. T. rex based on its similarity to another, larger tooth in my collection. Notes This tooth is from a juvenile individual. Serration densities illustrated in the above photos. There is a slight pathology (bend) near the tip.
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- juvenile tyrannosaur
- hell creek formation
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While my prime focus is essentially learning how to accurately describe Nature in the precise language of mathematics, I've always been intrigued by natural history - it's actually what started me on the path to physics. The sort of interrogation that paleontology practices provoked me to think and question even further, down to the fundamental science which makes it all work. Collecting fossils has brought a large amount of enjoyment to my life, and is often a welcome distraction from what can sometimes be straining work. The knowledge that I accumulate along the way is also part
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From the album: Hell Creek / Lance Formations
Tyrannosauridae (Nanotyrannus-morph) Hell Creek Fm., Powder River Co., MT, USA A classic Nanotyrannus Tyrannosaur tooth: compressed and blade-like. Exceptional preservation, with a minor wear facet near the tip on the lingual side (indicating it's from the left maxilla). I really like the color.-
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- tyrannosaur
- tyrannosauridae
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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-
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- tyrannosaur
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From the album: Hell Creek / Lance Formations
Tyrannosaurus rex Hell Creek Fm., Fallon Co., MT, USA The CHR suggests a posterior position for this somewhat beat-up T. rex tooth.-
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- tyrannosaur
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Identification Tyrannosaur teeth have similarly-sized serrations on each edge, and the serrations are chisel-shaped. This is a classic "Nano-morph" tooth being compressed and blade-like (which is the primitive condition of Tyrannosaurs). Notes This tooth has excellent preservation, with serrations crossing the tip, and clear enamel. There is a minor wear facet near the tip on the lingual side, indicating this is from the left maxilla.
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- hell creek formation
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