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Showing results for tags 'tyrannosaurid'.
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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 one since if the description is correct that would be pretty neat. So I wanted to ask if it’s likely to tell the difference. I know I should make a post on it but the pictures provided aren’t so good and I’m waiting for more rn.
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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.
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Id dinosaur teeth from hell creek, Tyrannosaurid? Dromaeosaurid?
Sergiorex posted a topic in Fossil ID
I’m not sure what species or group these dinosaur teeth are from, first one seems to me to be either Tyrannosaurid or Dromeosauird. I’m learning towards Dromeosaurid but I’m obviously no expert.The tooth measures 1/4 inch x3/16 and is from Garfield county Montana. Second tooth correct me if I’m wrong but doesn’t seem to be Tyrannosaurid nor Dromeosaurid. It has a weird shape and I’m not sure what group of dinosaur it’s from. It’s also from Garfield county, Montana. And measures half an inch x1/16. Sorry about image quality
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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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- dromaeosaur
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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, Tyrannosaurs often broke them in the process of biting. It may have been a while before the broken tooth was replaced by a new one, so in the meantime, the broken tooth would continue to accumulate wear. This is one such tooth, a large portion of the tooth was broken off when the animal bit into another dinosaur, and it was still used afterwards for some time before it was replaced. Based on the placement and extension of the carinae to the base of the tooth, and the size, this was an anterior tooth (at the front of the mouth, probably the first dentary tooth) of an adult individual. See Schubert & Ungar (2005) for a discussion on Tyrannosaur tooth wear features (open-access). -
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, Tyrannosaurs often broke them in the process of biting. It may have been a while before the broken tooth was replaced by a new one, so in the meantime, the broken tooth would continue to accumulate wear. This is one such tooth, a large portion of the tooth was broken off when the animal bit into another dinosaur, and it was still used afterwards for some time before it was replaced. Based on the placement and extension of the carinae to the base of the tooth, and the size, this was an anterior tooth (at the front of the mouth, probably the first dentary tooth) of an adult individual. See Schubert & Ungar (2005) for a discussion on Tyrannosaur tooth wear features (open-access). -
I have this very tiny tyrannosaurid tooth from hell creek formation, south dakota. Im wondering if it's possible to know if the tooth is from a infant nano or t-rex? Distal serration density: about 6/mm Can't see any intact serrations on the mesial side. Crown Height: 4 mm Crown base-lenght: 2,5 mm Crown base-width: under 1 millimeter, about 0,8 mm to roughly estimate (very hard to measure this one).
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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
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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). -
From the album: Hell Creek / Lance Formations
A Tyrannosaur tooth from Eastern Montana. Given the basal "pinching," this would be Nanotyrannus lancensis if it's valid (otherwise it's T. rex). Interesting to compare it to my other small Tyrannosaur teeth. The tip was probably broken after fossilization, but the gouges on the labial face may be inflicted while the tooth was in use. Note that the enamel is well-preserved with sharply resolved texture and is still clear. -
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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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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Is this a Two Medicine juvenile tyrannosaurid or Richardoestesia tooth?
-Andy- posted a topic in Fossil ID
Hello, this tooth has baffled me for years. I can't tell if it is a juvenile tyrannosaurid dentary tooth or a cf. Richardoestesia gilmorei tooth Its locality info is Montana, Two Medicine Formation The tooth has a serration density of 19/5mm on the distal mid-line. Unfortunately the mesial carina is worn down so that crucial data is missing The CH is 11.5 mm, CBW is 7 mm and CBL is 4.5 mm As far as I am aware, juvenile tyrannosaurid (with the exception of T. rex) have slender teeth while as this tooth is somewhat robust. Meanwhile, Richardoestesia gilmorei is somewhat of a wastebasket ID for many teeth(likely unrelated species), so this teeth should fall into the range of size and morphology for one May I have your thoughts on this tooth?z.thumb.jpg.60cf93b5817ace20aa91fb5176938645.jpg)
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Hi y'all, got this small theropod in the mail; I bought it suspecting it was Tyrannosaurid. Upon in-hand inspection, I believe that suspicion is confirmed. It bears close resemblance to one of my larger juvenile T. rex maxillary teeth. It also appears to have a slight pathology near the apex - a slight bend. @Troodon Tyrannosauridae Hell Creek Fm., Wibaux Co., MT, USA CH: 9 mm Mesial serration density: ~ 5.3 / mm Distal serration density: ~ 5 / mm Serration densities: Serrations: Here the pathology is more evident: Base (comparison with other T. rex maxillary tooth, right):
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From the album: Dinosaurs
Tyrannosauridae Hell Creek Fm., Powder River Co., MT, USA If Nanotyrannus is valid, then this is Nanotyrannus. -
From the album: Dinosaurs
Tyrannosauridae Hell Creek Fm., Powder River Co., MT, USA If Nanotyrannus is valid, then this is Nanotyrannus. Note that the serrations wrap around the tip ("apex") of the tooth as is common in unworn Tyrannosaurs. -
From the album: Dinosaurs
Tyrannosauridae Hell Creek Fm., Powder River Co., MT, USA ~ 3.6 / mm Notice that the enamel is still clear, with the dentine visible underneath. If Nanotyrannus is valid, then this is Nanotyrannus. -
Anyone can find restoration? (Tyrannosaurid indet tooth)
TeethCollector posted a topic in Is It Real? How to Recognize Fossil Fabrications
I saw a tooth of an Tyrannosaurid Indet. The price looks good and the size is 3.3 inches including the repaired lower end. The seller told that this is from Judith River Formation, Northern Montana, and No restoration. Can anyone find any evidence of restoration? I can't find any... And.. this is another one from the same seller. This is also Tyrannosaurid indet, and from JRF.
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Two Tyrannosaurid teeth that I ordered early this week has arrived. This is the first tooth that I want to show, which is a tooth of a juvenile Tyrannosaurus rex (or Nanotyrannus). Since I personally believe that the Nanotyrannus is an invalid genus, I think this is a juvenile Tyrannosaurus rex tooth. For those who do not agree, this is a Nanotyrannus tooth. This tooth is from Hell Creek formation of Garfield Co. Montana. This is an 1-3/8 inch, and has some chips and scratches at the labial side, but I think this is still a great tooth.
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Hi all, I could not resist and took another shot on my quest to obtain a Dakotaraptor tooth. Here the tooth in question this time: It was found in the Hell Creek Formation, Garfield County. Measurements are: CH 1,41 cm - CBL 0,68 cm - CBW 0,3 cm - denticles per 5mm are 22 mesial and 19 distal. Note the slight tilt of the denticles towards the tip of the tooth. It's the best fit I have found so far, what deviates from the dePalma description is the shape of the base, it has a pinch, but I would not consider it rectangular. As a side note, it looks exactly like the base of Acheroraptor teeth I have in my collection. But, I am not an expert Thanks for taking a look!
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A couple of days ago there was a thread that provided links to @Troodon 's id posts about identifying tyrannosaurid teeth. I didn't bookmark them and can't locate them. Any guidance would be appreciated. Thanks.
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it seems to be much more basal, but the news keeps saying close relative of t-rex like its a much more derived member of the group
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I decided to expand my obsession with sharks towards an obsession with theropods. I received my first piece today, a Spinosaur from Morocco, even making a display resembling the rolling deserts of the Sahara for it. This thread will be updated when any further theropod teeth arrive
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