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Showing results for tags 'nanotyrannus'.
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T. rex or Nanotyrannus tooth?
Tressmeister posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello, I am trying to identify if this is a T. rex tooth. It's described as "natural juvenile Tyrannosaurus tooth". Location: Hell Creek Formation, Montana. Dimensions: Height: 4.3 cm Width: 3.8 cm I've read this awesome post by troodon, and I'm leaning towards T. rex ("fat" and rounded tip) - but looking forward to seeing your opinions as well. Thanks and have an awesome day ahead!
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Howdy all. I've discussed the relationships between Nanotyrannus and Appalachiosaurus to albertosaurines and to eachother before, and today I'm wondering if relationships could be determined by the shape of their teeth. Comparing the teeth of nanotyrannus and appalachiosaurus, they are very similar to eachother, almost identical. They are also relatively similar to the teeth of gorgosaurus, though not as much. I believe it's already been established that these animals are relatively closely related, but I think this to be extra evidence to the case. (These fossils are not mine)
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Just saw this on a Facebook a preprint just released from a very prestigious dinosaur paleontologist Nicholas Longrich. From the abstract "Here, we review multiple lines of evidence and show that the totality of evidence strongly supports recognition of Nanotyrannus as a distinct species." "placement of Nanotyrannus outside of Tyrannosauridae as a non-tyrannosaurid member of Tyrannosauroidea." https://osf.io/preprints/paleorxiv/nc6tk/?fbclid=IwAR3_YkPSpKBQXk5Aiff0sJRKsl59dIqqO5DXveSjV-tx24Vs6ZLuRZdcaHs
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From the album: Dinosaur Teeth
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From the album: Dinosaur Teeth
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From the album: Dinosaur Teeth
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From the album: Dinosaur Teeth
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From the album: Dinosaur Teeth
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From the album: Dinosaur Teeth
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Hello Everyone, I bought this tooth nearly ten years ago as a Albertosaurus tooth from the Two Medicine formation, Montana, U.S.A. Whilst updating my labels I have learnt that Albertosaurus is not found in the Two Medicine Formation. As a result, i am asking if anyone can ID this tooth (i know it is very difficult or more likely impossible). I believe it is either a Distal Maxillary or a Distal Dentary tooth. The MC is 18 whilst the DC is 16 which gives it a DSDI of 1.125. The tooth is 2.90cm tall and the base of it is 1.22cm by 0.86cm. the link to some fairly high quality photos is: Tooth Id - Imgur thanks in advance, Josh
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Hi guys, I made this post about this small theropod tooth from the lance creek formation, Wyoming, USA. I bought it years ago and it was sold to me as belonging to a dromaeosaurid. It doesn't seem to me that it corresponds to any "raptor", but to a baby of Tyrannosaurus rex/Nanotyrannus lacensis. What do you say? Thanks in advance! Ps: the tooth is 1,2 cm/0.47 inch long and 0,6 cm/0.24 inch wide.
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Do you think its possible that nanotyrannus and tyrannosaurus could've shared a similar relationship to lions and hyenas where they would hunt at different hours to avoid competition? (Lions and hyenas hunt the same prey, but lions hunt at night whereas hyenas hunt at day.)
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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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Real or Fake: Nanotyrannus
Mt_Splashmore posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi All, Completely new to the world of fossil collecting and starting small and safe with teeth! But I’m conscious that there are a lot of fakes out there so to be safe I’ve completely written off the popular, colourful Auction site. I have two fossils at the moment (please see my other real/fake post!) which I decided to buy off a website. They are well regarded on local groups and forums so seemed like the proper way of buying my first fossils. In hindsight, I may have naively rushed into the purchases out of excitement without getting opinions from TFF (more because I didn’t know this place existed!). My second fossil was, a small Nanotyrannus tooth. The stated information is given below: Nanotyrannnus lancensis Hell Creek Formation, Maastrican, Powder River County, Montana, USA I do hope they are genuine, but I’d rather know the truth if they aren’t. If it is real, I’d also been keen to know any insight on condition, features, opinions you all may have! Finally, if anyone has any recommended sites/auctioneers etc. to find good quality fossils, feel free to PM me as any help would be greatly appreciated. Thanks in advance!
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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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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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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
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From the album: Hell Creek / Lance Formations
The preservation of theropod teeth doesn't get much better than this. -
Hi Everyone! I'm a little perplexed by this one. The tooth is definitely a Nanotyrannus, that much I'm sure of (Hell Creek, Powder River County, Montana) but it has a strange groove at the base near the mesial side. My best guess is that another tooth dug into it within the jaw or above the gumline. Impacted? Is that the correct dentistry term for that? Also does this count as a pathology or just damage? Anyway, I wanted to see what you all thought if my "impact" hypothesis makes sense or if there's a better explanation. Any insight is greatly appreciated as always!
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I have this tooth that I got from Tooth Draw Quarry. It's probably nano, but just wanted to make sure. CH is 15mm CBL is 8 mm. Serration density is about 4/mm distal and maybe 5 mesial. Sorry for the blurriness. Also, the base is only pinched on one side. Thanks for any help.
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I'll break my trip report to South Dakota into two parts. First will be my visit to the BHI followed by collecting adventure The purpose of going to the BHI was to pick up the Leptoceratops maxilla's I left during my June trip. Pete has been collecting and pulling together specimens to understand and possibly describe this ceratopsid in the Hell Creek. The material he's collected so far appears to be from an adult and is much smaller than L. gracilis. My maxilla's seem to fit the smaller morphotype. In addition, the BHI provided me two sets of replicas of my specimens, pretty cool. Tankankaceratops is a controversial ceratopsian described by Ott and Larsen 2010. It's a small Triceratopsini known from a partial skull. Pete showed me its occipital condyle which is fused and indicative of an adult. Very cool nasal horn core. Here is a close up of Struthiomimus sedens hand/part of arm... the business end. Good reference photos A new addition to the museum is a cast of a juvenile Tarbosaurus skeleton that was being assembled in June trip Here is some White River material that was recently collected. Think Pete said the top left skull was a rare Camelidae Hespercyon Took photos for reference of the metatarsals from Nanotyrannus Another reference bone a Nanotyrannus carpal bone, much longer than any found on T rex.
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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.
