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Showing results for tags 'trex'.
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Sellers says this is a Trex vert from the Hell Creek Formation. Any way to tell the difference between a Trex and a Herbivore? @jpc @hadrosauridae
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Any help here? Looks a lot like some T-Rex teeth I’ve seen. Found in Indiana.
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Could T-rex’s “useless forearms” be competing with head and neck musculature?
Sightreader posted a topic in General Fossil Discussion
OK, some naive, pure speculation about those “useless forearms” on large theropods (T-rex, abelisaurs, etc…) Could it be that, in theropods, arms muscles actually compete with head and neck muscles for attachment space on the shoulder girdle? I can’t answer this because I have no idea how the muscles are laid out for theropods. Is there even such a thing as neck muscles that attach to the shoulder girdle, or are these completely unrelated muscle systems? Would reducing arm musculature provide any sort of advantage to the head and neck of theropods? My thought is that, having the combination of having powerful jaws capable of securing a grip on massive victims, then having the necessary neck and head strength needed to either wrench around or yank big chunks off the dangerously powerful prey of the time might be such a key advantage that it would be worth giving up your arms for. This would not mean, then, that their forearms are necessarily “useless”, which might explain why some of these tiny arms remain as well-muscled as they can be (without sacrificing head or neck power). In addition, I heard somewhere that weight and volume grow by the CUBE of size while muscle strength only grows by the SQUARE of size (that is, by the area of a muscle cross-section). I don’t know if it’s really that simple, but it would mean that, as these theropod heads and necks get bigger and bigger, they would need proportionally a LOT more neck musculature to catch up with the faster growth in head weight and inertia. Of course, this would not explain why those tiny, wacky alvarezsaurids have small forearms… that would have to be a totally different selection pressure. Does this make any sense at all or did I just make a complete fool of myself? Be gentle… I’m obviously new at this, lol!
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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-nerds, yes it accurately has incisiform premaxillary teeth with a lingual apicobasal ridge. To get the shape of all the teeth right, I referenced a couple in my collection. They were duplicated and squashed around to match the variation in morphology of the dentition. I also uploaded the model for you to interact with; honest critiques are welcome as it's not a final version I feel is ready for full scale printing. Certain aspects of the anatomy, especially the hard-to-see interior portions are probably where most errors lie. In December, I however did print a smaller scale to see how it looked: The nice thing about digital sculpting is that I can copy the entire skull and very readily reshape it into a similar one. The natural choice is to do a young juvenile / baby T. rex. This is as much a hypothesis as it is art. I based it off of the Witmer Lab's more rigorous reconstruction of "Chomper", and a similarly-sized young Tarbosaurus (which was a close cousin of T. rex). I again uploaded the model for your enjoyment / inspection: Next, I decided to wander much farther from Tyrannosaurs and shape it into a Troodontid, Pectinodon bakkeri. Of course Pectinodon is only known from its teeth, so I at least got the shape of those right (again, based off of a fossil in my collection). The rest was inspired by the reconstructions of others, presumably informed by more completely-known Troodontids. And finally, a sneak peak of what I'll be working on, Acheroraptor temertyorum. This time it's from scratch since there are some things I want to do differently. Thanks for reading, hope you enjoyed!
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Hello, this tooth is listed as Tyrannosaurus Rex / Nano tooth. It measures 2cm and it comes from Carter County in the Hell Creek Formation. Is the id correct? Can it be either a nan o or a trex tooth? I will tag you @Troodon as you are the expert in this matter! And this other tooth from the same place measuring 2.2cm. And this third tooth 3,2cm same location.
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The goal of this project was born by and for people who love dinosaurs and paleoart in general. My purpose is to give people a representation as realistic as possible of what these great extinct creatures were, regardless of the time or work involved. With the funds raised I will publish my first 3d models, a Trex and an Edmontosaurus as an example. of what can be created later.As a photo is worth a thousand words, here you can see the level of detail used to. greetings to all.
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Hello, everyone. I have a T-rex tooth. It has a wear surface at the distal serration. Yes, I think it is black, but when I shine it with strong light, it appears brown and slightly yellow. I would like to know what causes the wear surface to show different colors? Thank you
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New controversial study shows how theropods were "smarter" than primates
Pliosaur posted a topic in Fossil News
Although the research regarding this was only published this month, there has been a lot of intense speculation and controversy as to whether theropods especially Tyrannosaurus Rex were comparable to being "primates" of their time. "According to her findings, theropods had as many neurons in their brains as monkeys do today, with the T-Rex boasting "baboon-like" numbers of up to 3 billion neurons. That's a pretty scary level of intelligence for a killing machine the size of a house.With that many neurons, a T-Rex wouldn't have just possessed uncanny cognition. It also might have lived longer, up to 40 years, Herculano-Houzel estimates. That's enough time and smarts to potentially be a social creature with its own culture, like primates and whales, and also suggests they may have worked together, too." Some great sources and videos, feel free let me know your thoughts on this below! The actual study can be found online and reported in the Journal of Comparative Neurology https://www.science.org/content/article/some-dinos-may-have-been-brainy-modern-primates-controversial-study-argues https://phys.org/news/2023-01-phylogenetic-bracketing-dinosaurs-neuron-density.html https://www.sciencealert.com/t-rex-was-a-lot-brainier-than-we-thought-researcher-claims-
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Hell Creek Tooth Identification / Antemortem Enamel Spalling
Joseph Kapler posted a topic in Fossil ID
This partial crown was collected from the Hell Creek Formation, Garfield County, Montana. I acquired it for a teaching collection because I think it tells a story. The basal section shows almost an inch in diameter. Is this a Trex tooth? The tooth shows antemortem enamel spalling and wear as described by Schupert and Ungar, 2005. It feels as though that the tooth was broken as a result of probably bone crushing and was worn smooth with continued feeding, then shed some time later. I would appreciate your thoughts..thumb.jpg.ad9ae103b28b2aee15ea0ae162813c04.jpg)
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Hello all I met a very strange tooth. The label is Tyrannosaurus Rex tooth. Its enamel is white instead of yellow under the UV light (the picture is a video screenshot). The last photo is another tooth under the UV light to show that the device is not causing the color difference. Have you met? This is the first time I've met. I'd like to hear your opinions on this. Thank you
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From the album: Hell Creek / Lance Formations
The preservation of theropod teeth doesn't get much better than this. -
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! -
Hello! Is this a Tyrannosaurus Rex tooth? Found in Hell Creek Formation of Garfield County, MT Tooth measures 1.75 inches, see picture with caliper Thanks in advance!
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Is this a Tyrannosaurus rex tooth? from the Hell Creek Formation in Carter County, Montana, USA! The tooth has great serrations, a good tip, a partial root, and no repair or restoration! It measures 1.077 inches (2.74 cm) along its longest edge (straight line) and measures .43 x .322 inches (1.09 x .818 cm) at its base!
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Hi all, saw this listing for a tooth, it’s from Meade County, South Dakota and looks to me like either a Nanotyrannus or Tyrannosaurus rex tooth. Want your opinions, I personally am leaning towards Nanotyrannus due to the pinch however it seems to be pretty robust. Thanks in advance measures about 1 cm
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Tyrannosaurids Teeth? And Dromeosaurid tooth? Identification hell creek
Sergiorex posted a topic in Fossil ID
Hello I was looking at a few teeth and wanted help with identifcation First one I’m almost certain is a tyrannosaurid, even though it’s in horrible condition and am leaning towards Tyrannosaurus Rex due to robustness and no pinch. it comes from Garfield county, hell creek form and measures .6 inch. Second one is also likely a tyrannosaurid, im leaning towards Nanotyrannus but it’s probably a indeterminate tyrannosaurid. It’s from hell creek form, no locality unfortunately. Size is about 1 3/8 by 1/2 inch. 3rd one seems to be a Acheroraptor, also no locality besides hell creek form. And measures .35 inch. Last one is probably just indeterminate theropod tooth, maybe can be narrowed to tyrannosaurid? It seems to be a premax and also no locality besides hell creek, measures about .5 inch. Thanks in advance for your opinions.
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I just bought this tooth, it hasn’t arrived yet but I wanted to see your thoughts on the identification of the tooth. I personally am leaning heavily towards the Tyrannosaurus rex but want to see other peoples thoughts. The tooth is quite robust and probably would’ve been quite long if complete. It doesn’t have the pinch and yea that’s why I think it’s rex. The tooth is from Garfield county in hell creek formation and about 1 inch long. There seems to be a pinch on the first image but if you look at the last one you can tell it’s just bulging.
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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.-
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Hi guys, just little wip with my version of TRex Skull Different mats and lights Some detailing
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This was found in Powder River county, Montana. and I was wondering what species it is, they think it’s nano but I’m leaning towards trex as it’s more robust and has a circular bottom
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Tyrannosaurus Rex tooth, a good buy?
heZZ posted a topic in Is It Real? How to Recognize Fossil Fabrications
What do you think about this ? It has some repair done but can you show me where how much. Location: Hell Creek Fm., Powder River Co., Montana
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Here is my new wood grain Tyrannosaurus rex tooth. Found in Hell Creek, South Dakota and just shy over 1'40 inches. I really like the split with the serrations. Makes it extra special for me.
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Rare find inside Scotty T. rex fossil / A Canadian Contribution
Denis Arcand posted a topic in Fossil News
Saskatchewan researchers have reportedly discovered an extensive network of blood vessels preserved in the fossil of a tyrannosaur rib. This discovery, if confirmed, would be the first of its kind. Sask. research teams make rare find inside Scotty T. rex fossil How dinosaur blood vessels are preserved through the ages Scientific Reports Who is Mauricio Barbi-
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Hi there everyone! I’ve recently been looking for a tyrannosaur tooth to add to my collection and I came in contact with a very nice seller who’s in possession of two theropod teeth. The main tooth I have questions about is the “Albertosaurus” tooth as that one seems to be the one which would be easiest to ID. I was wondering if it was truly an Albertosaurus tooth or if there was any other identification that could be given to it. The other tooth, the “Tyrannosaurus Rex” tooth, only has one picture and seems to be in two pieces. I’m aware that the single picture makes it near impossible to properly identify, but I’d greatly appreciate it if you guys could still give it a shot and give a rough guess. Since it’s somewhat small I reckon it could be a Nanotyrannus specimen, though I’m aware that a view of the bottom of the tooth would be somewhat necessary to identify it as such. Thank you everyone for your help. I’ve thoroughly enjoyed my time here in this forum and I can’t wait to keep learning and sharing!
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Hi there everyone! I've recently been adding specimens to my collection and I came across a listing advertising a juvenile tyrannosaur / nanotyrannus tooth coming from the Hell Creek formation in Montana. The seller is very reputable thus I have no doubt that the specimen itself is truly a fossil. Instead, I was wondering if anyone could help me positively identify the specimen as being from a juvenile tyrannosaur / nanotyrannus (depending on which camp you come from). Thank you!
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