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Showing results for tags 'tyrannosaurid'.
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Hi all, Do you agree that this 0,7 inch tooth from the Hell Creek formation is a tyrannosaurid premax, or could it be something else? Thanks!
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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 w
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Identification Tyrannosaurid Teeth From Canada & United States
Troodon posted a topic in General Fossil Discussion
Updated Nov 25, 2022 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 Western North America (US/Canada) to help in identification. The following is the current understanding of those Tyrannosaurids described/known with the stratigraphic unit where they are found. If I missed any let me know. Albertosaurus sarcophagus : Horseshoe Canyon Formation cf Albertosaurus indet: Wapiti Formation Gorgosaurus libratu- 86 replies
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Hi y'all, about a year ago I started digital sculpting on my tablet and began with some Devonian "shark" teeth, inspired by ones in my collection (see topic here). Several months later after becoming more familiar with the process, I decided to try my hand at dinosaur skulls. In particular, I wanted to render the juvenile Tyrannosaurid, "Jane" (BMRP 2002.4.1) since regardless of your stance on the species, it's an important and cool fossil. Here I present my amateur first pass. My end goal is to have a 1:1 scale 3D print. And for you Tyranno-ne
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I recently read that the only skeleton currently known of Appalachiosaurus was of a juvenile, and the adult animal was significantly bigger. The juvenile skeleton was about 21 feet long, and the animal likely weighed 1,300 pounds. This skeleton is about the size of a juvenile Tyrannosaurus rex (using the "Jane" specimen for scale, BMRP 2002.4.1) and, this raises a question in my mind. Is it possible that Appalachiosaurus montgomeriensis would have attained adult sizes close to what we see in adult specimens of Tyrannosaurus rex? And as such, could we classify it as a me
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Hello everyone, first post from me here. I have a 1.8 cm (roughly 0.71" for those who don't use the metric system) Hell Creek tyrannosaurid tooth that is in need of identification. Currently, the tooth is labeled as N. lancensis, though a while ago, the seller labeled the tooth as a juvie T. rex, and now I'm confused about whether I should label it as a Nano, a Rex or a Tyrannosauridae indet. (though since it's from HC it should be either of the first two) Notes: - Total serration count: 55 on both sides. - Pic 1, which consists of shots of the same tooth taken from all angles, w
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The North American Tyrannosauroidea Species from the Aptian-Santonian Cretaceous
Joseph Fossil posted a topic in General Fossil Discussion
The Tyrannosaur Dinosaurs (Tyrannosauroidea) inhabited North America from 152 Million Years ago during the Late Jurassic era up until 66 Million Years ago during the Late Cretaceous era. https://www.app.pan.pl/article/item/app20110141.html However, there is a relatively large geologic gap between the time of the Late Jurassic to the Santonian-Campanian stages of the Cretaceous (when the the oldest known Tyrannosaurid Lythronax (Late Creteaceous, 81.9-81.5 Million Years ago) emerged) in terms of the number of Tyrannosauroidae confirmed in North America. However, thi -
Can someone ID this tooth ? Is it worth buying?
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Recently acquired this beautiful T. rex tooth, just over 5cm / 2” length. Such teeth are typically dark brown / mahogany coloured but this specimen appears to have escaped the usual staining. The location of find (Hell Creek Fmn, nr. Mosby, Garfield Co., Montana, USA), basal rectangular cross section and thicker enamel supports identification that this is a Tyrannosaurus rex maxillary tooth. The fact that the whitish / pale colouration is consistent throughout, absence of pitting / “dried out” appearance / absence of splintering would seem to preclude sun-bleaching.
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The two most prominent hypothesizes on the direct evolutionary origin of perhaps the most famous Theropod Dinosaur from the fossil record, Tyrannosaurus Rex (Tyrannosauridae, Late Cretaceous (68-66 Million Years ago)) are what I call the Laramidia and Asian Origins. The Laramidia origin (named after the region of the Western North America which was a separate Continent during most of the Late Cretaceous and home to a vast amount of dinosaurs including Tyrannosaurus rex) hypothesizes that Tyrannosaurus rex is the direct descendent of and evolved from slightly older North American T
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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.-
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Could Tyrannosaurus rex have created unique cultures
Joseph Fossil posted a topic in Questions & Answers
I recently found an extremely interesting paper published in the Journal of Comparative Neurology a few days ago by Professor Suzana Herculano-Houzel of Vanderbilt University about the neuron activity within the brain of the Dinosaur Tyrannosaurus rex (Western North America, Maastrichtian Cretaceous 68.0-66.0 million years ago). The study states there is evidence (based on the size of of the Cerebrum section of its brain and the hypothetical amount of neurons (of which for the study M=Millions of Neurons) present in the brain based on its size) Tyrannosaurus rex had between 2,207-3,289M telenc -
"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
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"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
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Any further information on this Tarbosaurus skull?
ChrisMouM posted a topic in General Fossil Discussion
Does anyone know the catalog no. of this skull? And is there any paper mentions this skull? or more descriptions for it. thx guys help. have a lovely day. -
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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Hi, guys. Does anyone have some high-quality images of Albertosaurus sarcophagus skulls (or maxilla /dentary)? please. and the following images were my sharing, which I found on the internet. Thanks for your guys' sharing. have a lovely day guys.
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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
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From the album: Dinosaurs
These strange, incisor-like teeth were originally thought to have belonged to a large Cretaceous mammal. Later discoveries showed that these teeth matched the front teeth of young Tyrannosaurs quite well. Given closely spaced, parallel feeding traces on bones, these "incisorform" teeth likely were used to scrape meat from bone. -
I have an interesting question when I read a paper (Hurum, Jørn H.; & Sabath, Karol. Giant theropod dinosaurs from Asia and North America: Skulls of Tarbosaurus bataar and Tyrannosaurus rex compared) I only found that it was mentioned in the content, T.rex had stereoscopic vision(Stereopsis), but I did not find any description of the vision of Tarbosaurus. Does anyone know that Tarbosaurus had stereovision? If Yes or No, please explain the reasons and provide a paper to prove it.Please Thanks guys. have a lovely day
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These teeth were sold as a baby tyrannosaurid and a dromaeosaurid/bird respectively. Some other specimens from this lot have been posted here if I recall. But they are from North of Havre, Montana close to the Canadian border. Apparently they are from quite an old collection from around 1950-70s. The provenance should place it solidly in Judith River Formation. Since these teeth were selling somewhat quickly, I just grabbed them and decided on figuring it out later. The first tyrannosaurid tooth does have some similarities to Dromaeosaurus with the mesial twist, but I could be wron
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Hello, I am going to post a tooth I found a few days ago. I will try to follow the theropod tooth description post on the photos and info. Letme know if I am missing anything. Thanks for any help. It was kind of hard to miss! Fmtn: JRF State: MT County: Hill County CH: 33 mm
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Hello so I was wondering if it’s possible to identify a theropod bones vs herbivores easily. I heard theropods are more hollow and have a honeycomb structure but I’m wondering if there are any more difference. I know that if they are found near a skeleton obviously it’s more likely to be from the same dinosaur. I was wondering since I see this seller that sold a lot of bones that he claimed is tyrannosaurid and he seems pretty knowledgeable so I was wondering if it was likely the description are correct. They are generally 4-7 inches long and are “limb bones.” I was thinking about buying on
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This small tooth was found in powder county, it measures a little over half a inch and I wanted help with identification . Seller listed as either Nanotyrannus or Tyrannosaurus rex. I also think it’s most likely tyrannosaurid, and I wanted to know whether it’s tyrannosaurid and if it is whether it’s more likely to be Nanotyrannus or Tyrannosaurus rex. Im assuming it’s just a indeterminate tyrannosaurid because of the base damage and size, but please let me know you opinions.
