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Showing results for tags 'tyrannosaurus rex'.
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Controversial Abstract by Tom Carr: Tyrannosaurus rex an endagered species
Troodon posted a topic in General Fossil Discussion
This was posted on FB by AAPS. It was written by the paleontologist Tom Carr who is an extremist on these matters and as expected its receiving quite a negative reaction on social media. George Winters indicated he is preparing an article to address an opposing view I don't have the paper for now just screen shots so if anyone can add anything please do.- 76 replies
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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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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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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.-
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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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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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Some news from Germany regarding the Tyrannosaurus rex "Tristan Otto" Poor Tristan Otto had a nasty bone disease. It was found by using a CT-based, nondestructive imaging approach. Full article: CLICK
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From the album: Hell Creek / Lance Formations
Tyrannosauridae Hell Creek Formation Tyrannosaur teeth from various counties in Montana. Largest CH (Crown Height): 22 mm-
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From the album: Dinosaurs
A high-quality replica of Stan's 2nd maxillary tooth. About 11.5" in length. Displayed with a 3D-printed stand I designed.- 4 comments
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Hello! I inherited this piece with the idea that it could possibly be a space rock. I checked the magnetism and it has no magnetic properties whatsoever. After closer examination with an open mind and a little imagination, I see a petrified baby dinosaur laid on its side with its neck possibly broken at the base of the skull. Below what looks like the neck is a split section that looks like a chest cavity with a arm/leg on either side. . The strangest part is that there seems to be the head of another species resting on the side of the laid do
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My first post on the forum was to see if anybody could show me an adult specimen of “Nanotyrannus.” I was more forceful in that approach because, from what I’ve seen on Twitter, “Nano” fans like to argue with paleontologists on the validity of the genus, even though these scientists have been studying dinosaurs for years and have degrees and Ph.Ds in different scientific fields. The evidence points them in a different conclusion compared to the public, and the fact that they are being so heavily resisted against with regards to this topic is baffling. I decided to play the “Nano” fans at their
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From the album: Hell Creek / Lance Formations
Tyrannosaurus rex Hell Creek Fm., Carter Co., MT, USA More information Art by RJ Palmer-
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Hell Creek Formation Juvenile Tyrannosaurid Teeth
ThePhysicist posted a gallery image in Members Gallery
From the album: Dinosaurs
A juxtaposition of the bases of two juvenile Tyrannosaurid tooth crowns from the Hell Creek Formation. Nanotyrannus: Dawson Co., MT Tyrannosaurus: Carter Co., MT- 1 comment
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Hi all. I'd like to begin by thanking the members of this forum for the profound wealth of knowledge that you all have shared with me during my search for further understanding of dinosaurs, fossil collecting, and fossils in general. Prior to joining, I was a longtime lurker that regularly referenced this forum and its many posts to answer countless questions that I had, and I continue to reference it! The information contained on this site is invaluable. I would especially like to thank @Troodon for his amazing guides and detailed write-ups, such as the case made for Nanotyrannus. That really
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From the album: Dinosaurs
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Juvenile T. rex maxillary tooth basal cross section
ThePhysicist posted a gallery image in Members Gallery
From the album: Dinosaurs
Tyrannosaurus rex Hell Creek Fm., Wibaux Co., MT, USA Minor compression, common in maxillary teeth. It closely matches my larger juvenile T. rex. -
From the album: Dinosaurs
Tyrannosaurus rex Hell Creek Fm., Fallon Co., MT, USA Not in the best shape, but a clearly robust tip with some feeding wear. -
From the album: Dinosaurs
Tyrannosaurus rex Hell Creek Fm., Wibaux Co., MT, USA This is a juvenile Tyrannosaurid tooth. The serration densities are similar on each carina, the serrations are chisel-shaped and robust, the tooth is not recurved, and the mesial carina is straight. It closely resembles my larger T. rex maxillary tooth in cross section. -
From the album: Dinosaurs
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From the album: Dinosaurs
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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:
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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. -
From the album: Dinosaurs
Tyrannosauridae Hell Creek Fm., Powder River Co., MT, USA If Nanotyrannus is valid, then this is Nanotyrannus.
