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  1. Mousehead

    T-rex tooth or another dino?

    Only other info I know is it's supposedly from Liberty County, Judith River Formation. About 2" long. Doesn't look like a carch tooth so I'm hoping it's actually T-rex.
  2. jikohr

    Nanotyrannus or T-rex?

    Hi everyone! So, yeah. I keep going back and forth on this one. I've been told it's Nano, but the serration count seems low for Nano (23 per cm distal 25 per cm mesial) and it looks a lot thinner than it actually is on account of a piece of the base missing. That and it's really big for a Nano tooth. Dimensions in mm are 50 x 18 x 11 Dimensions in inches are 1.97 x .71 x .43 The pictures are labeled rex because that's what I though it was originally. This is just bugging me so I'd like a second (or more opinion) just to put my mind at ease once and for all.
  3. Hello everyone! I just started learning about dinosaurs and am very excited! I’m trying to grapple with some weird things about the T-rex and was wondering this: could T-rex have been a “persistence” or endurance hunter? I’ve been reading things that say the T-rex was probably slower than most of its prey. Rather than out-sprinting its prey, might T-rex have simply been in “better shape”? That is, might it have been capable of sustaining an elevated pace far longer than its prey, then relying on superior tracking skills to relentlessly close on hiding prey attempting to cool down and recover from exhausting sprints? I’ve heard this method proposed for early hominids and wondered if T-rex might also fit the bill, but I really don’t know what goes into a successful “persistence predator”. Thank you all for being understanding - obviously I’m new at this - and thank you especially for not laughing at yet another monumentally uninformed crackpot idea! https://en.wikipedia.org/wiki/Persistence_hunting
  4. A new "T-Rex" tooth just showed up on our favorite site. It is not a Tyrannosaurus rex tooth however but a more common and far cheaper Carch tooth. We know this because of its more blade-like morphology, its slender profile, its shape, its smaller denticles and the sand on the base I already notice multiple bids on it and I have no doubt the price would escalate as many hopeful collectors would try their hands on getting a cheap T-Rex tooth for themselves. For anyone looking to buy a true T. rex tooth, there are several factors to take note of: 1) Thickness - T. rex had crushing teeth, hence the teeth are thick. They are meant to crunch through bone 2) Locality - T. rex teeth in the market commonly comes from the Hell Creek Formation and Lance Formation. These two formations are found in Montana, Dakota and Wyoming. If a tooth originates from Africa or Morocco, it cannot be a T. rex tooth 3) Price - T. rex teeth command a premium price. Even a small tooth an inch long may cost 500 USD or more. A 2.5 inch tooth would easily be 2k USD. While exceptions do occur, if a deal seems too good to be true, then you should be extremely wary 4) Source - Make sure you get your T. rex tooth from a reputable source. By that, I don't mean a seller with a high feedback score or someone who prints you a "cert of authenticity". I mean a seller who has a history of collecting or selling Hell Creek/Lance Formation material. Better yet, get it from someone who digs there 5) Morphology - Educate yourself on the differences between T. rex, Carch, Spino, Daspletosaurus and other large theropod teeth. That way, you can immediately spot inconsistencies such as serrations or colors that does not match a T. rex tooth 6) Cross section - If all else fails, look at the cross section. If the tooth has red sandy matrix or sand, it is most likely not T. rex but is more likely from Morocco Here, I will show an example of a red T. rex tooth that superficially resembles the Carch tooth above. Take a look at the thickness and cross section though and you would quickly realize both teeth have very different morphologies Getting an authentic T. rex tooth isn't cheap, nor will it be easy. But it will be worth it in the end when you finally obtain one. Good luck in your hunt and always feel free to ask TFF if you are unsure of an upcoming purchase
  5. I have just become aware of this barbaric practice! These beautiful creatures are being forced to "race" for the amusement of the onlookers! I would not be surprised, if illicit wagering were part of this opprobrious "entertainment." Contact you congressman now! This shameful, cruel practice must be stopped! Look at the poor condition of the exploited animals at the end of the video. Some of the lovely creatures appear to have broken their necks in their effort to please heartless humans! This senseless depravity must stop!
  6. Hi there! I recently purchased this online, could you please help identify this? the seller was unsure if it was a juvenile trex or a nano. It was found in Hell creek dawson County east of Glendive Montana Thank you :)
  7. Sales just concluded a min ago. I definitely wasn't expecting it to reach this insanely high amount. No word yet AFAIK on whether he's going to a private collection or museum Is this the highest a dinosaur has ever been sold for? I wonder what precedence it'd set for fossils and paleontology moving forward On the pro side, it'd encourage more folks to go out there looking for fossils and possibly finding rare and important finds. On the con, more fossils might be priced out of the reach of museums
  8. Hello i am considering purchasing this T-rex tooth. The seller claims that their are no repairs with nice enamel and good serrations. with the only damage on the tooth mentioned being on the inside edge. My questions are simple is this really a tyrannosaurus rex tooth and is there any sign or repaired damage or anything that would indicate the tooth is fake etc. Information about the tooth: Age: 65 Million Years / Carter County, Montana Hell Creek Formation / Size: 2 inches long Below are the images they have provided.
  9. Hi everyone, do you all think this would look better with the cracks filled and fully restored or as is?
  10. Hello. A while ago I purchased this specimen from a highly reputable and established seller. It's a T-Rex jaw fragment from Lance Creek, Wyoming, and was a surface find (see photos of the original specimen in situ; according to the finder, "the piece in question is at the very bottom left, on top of the edge of the longer bigger bone; the tooth grooves are face-down."). I'm reaching out to Fossil Forum for guidance along the following lines: 1) What part of the jaw is this most likely from? I've been studying images on-line at a cursory level, but I can't find the distinction convex part of the bone that my specimen has (the part that sticks out like a thin ridge). Any thoughts or, even better, photos of comparable specimens? 2) I trust the original seller, but since it was not found as part of a larger Rex specimen, I figured I'd ask for your confirmation: is this almost certainly a T-Rex? I'm fairly knowledgeable regarding teeth, but not mandibles. Thank you all very much in advance; any insight would be deeply appreciated. With best regards and gratitude, Ryan
  11. Hi all, I could not resist and purchased this tooth knowing it would be a tough call to make. It was found in the Hell Creek Fm. The big problem is the worn down mesial carina, there are however some remnant denticles I could measure, but not midline – more posterior. Taking them into consideration the tooth has distal 4.5 denticles per mm and mesial 6 per mm. The other measurements are: CH 1.47 cm / CBL 0.74 cm / CBW 0.39 cm. Based on this and the oval base I am leaning towards Dakotaraptor but might as well be a specific T-Rex tooth position.? I really need someone more experienced to take a look please. Any help is highly appreciated.
  12. Hello, I was doing a study on the T. rex and Nanotyrannus teeth specimens I had, and I wanted to compare them against a list of known T. rex teeth with measurement. The paper: Dental Morphology and Variation in Theropod Dinosaurs: Implications for the Taxonomic Identification of Isolated Teeth (JOSHUA B. SMITH, DAVID R. VANN, AND PETER DODSON) contains a list of 115 T. rex teeth. To make it easier to compare and read the data, I combined the measurements into a single chart, added colors and lines for ease of reading, and added the size and names of the T. rex used in the study Feel free to refer to the below chart for T. rex teeth measurements. I had to split the chart into 2 due to size limitations, but if you want the full-sized PDF version (25 MB), please message me so I can send it to you by email. If you have any suggestions to improve readability, or have your own data to add, go ahead and post it here! I will be posting pics and measurements of my various T. rex and Nanotyrannus teeth here @Troodon
  13. I found a mark of suspected skin in the deepest part of the large footprint of a suspected dinosaur? I found very little data on the toe skin marks on the Internet. Some people know what the skin texture is on the toes of large theropod dinosaurs?
  14. Hello All, So recently I've been doing a little bit of reading on random fossil news to pass the time, and I keep reading a lot of comments about "illegal fossils" and whatnot. One specific specimen that comes up a loooot in my readings is the T-Rex fossils. Some mention the legality of the issue, some mention the fact that they might be going to private collectors rather than museums, and many mention both. I understand why the scientific community might want to perform research on the specimen, but seeing as there are more than a single T-Rex fossil that belong to museums, shouldn't this be fine to sell a couple to collectors? Also when a fossil is considered "illegal" what exactly does it mean? Illegal as in illegal to find, illegal to keep if found, illegal to ship overseas, and/or illegal to sell? Thanks, -Em
  15. As the lockdown continues and I can’t go on any new adventures here’s another amazing experience from my palaeontological back catalogue. A little shorter this time than my Burgess Shale story. I was back home from university for the Christmas holiday and decided to go with my family to the Burke Museum in Seattle. I’d been many times before as a child but this time I was going to see something special the Tufts-Love rex, and I got lucky. We had arrived in the morning just before they opened and were one of the only families there, as I was peering into the lab area trying to see as much as possible, the preparator stopped, came to the door and asked if I wanted to see it up close. Next thing I knew I was face to face with the T-rex. Looking at it up close you could see the fine detail in the bone where veins ran into the maxilla and the almost feathered texture of the supraorbital ridge. She even let me touch it, something I never expected a museum to allow me to do. Of course I couldn’t pass up the photo op. In the picture the googly eye is in the wrong place, it should be up a little higher where in its place one of the preparators put a sticky not saying “no more prepping in eye hole”. Clearly the temptation to continue in further and hollow out the skull while it was still half in block was just too strong. You can also see one of the nasal bones has been exposed and has been displaced. At the time I got to see it, they weren’t sure if this meant that the other was missing or how complete the other side of the skull was. Now that the skull has been fully prepared we know (There is a fantastic thread elsewhere on the forum by @Troodon documenting its preparation). 100% of the skeletal elements are present and it’s one of the most complete skulls ever found. I haven’t seen it fully prepared yet though, since I haven’t gotten back to the Burke since it has been renovated but next time I’m back in Seattle it’s the first thing I’m going to do. Thank you all for reading, Benton
  16. CEP

    T-Rex Tooth?

    I found what looks like a couple t-rex teeth, there are 4 good size pieces and about 20 smaller pieces. Looks like a complete 2.5" tooth once I piece it together, maybe longer and another partial tooth. Is it T-rex? also what is the best way to glue the pieces together? Is it worth paying someone that knows what they are doing? Also would it be worth digging into that area and see if there are more?
  17. Roby

    Tyrannosaurus rex Tooth

    Tip was missing and was repaired. White marks are from plant roots pulling minerals off the surface.
  18. Hi it is my Birthday today, and since it is my birthday I was going to get some fossils. I found this and am wondering if it’s a genuine tooth and if it’s a T-rex or not, if that’s possible through the sellers photos.
  19. Tony G.

    Baby T-rex 3d print

    Here is my baby T-rex 3d print. 3d files came from https://cults3d.com/en/3d-model/various/life-size-baby-t-rex-skeleton-part-01-10. This one took me about 8 months to complete.
  20. Pemphix

    Moving a T-Rex

    https://www.spiegel.de/wissenschaft/t-rex-tristan-otto-dinosaurier-aus-berlin-zieht-um-a-79c202b0-2671-4abb-be0b-1fa9aec8c7ab https://de.wikipedia.org/wiki/Tristan_Otto
  21. Seller thinks most likely to a T-rex. Found near the Hell Creek Formation.
  22. How strong could a t-rex's bite force be? What modern day animals could it compare it's bite force to?
  23. dinosaur man

    Nanotyrannus in Canada

    Hi the debate about Nanotyrannus got me thinking is Nanotyrannus found in Alberta Canada in the Scollard or Frenchmen Formations. If not then it could be valid since T-Rex is found there and if it’s a juvenile Rex then there should be a least some evidence for It there, since T-rex’s are found there. And if so this could provide Nanotyrannus’s range.
  24. I was searching the internet earlier today and found out that all Aublysodon teeth where that of Tyrannosaurinae juveniles. From Two medicine formation Daspletosaurus horneri, from Judith river formation and Dinosaur park formation Daspletosaurus sp., and from Hell creek and Lance formations T-rex, and so on... The study was done by Dr. Phil Currie, hope this helps with teeth like this!!
  25. anastasis008

    Is nanotyrannus valid?

    Hello everyone, I know this is a big scientific debate and I have researched about it but I haven't come to a conclusion. What do you think? Thank you
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