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Found 19 results

  1. Hi TFF, I am a Dromaeosauridae enthusiast and have been collecting online for a little while now. I want to thank the members here for getting me educated on so many aspects of fossil teeth identification. I want to share my small collection in the hopes this is helpful for some of you in the future. Your critical input is highly appreciated, as always! #1 First up, one of my treasures, a robust Deinonychus antirrhopus tooth from the Cloverly Fm. A big thanks to @StevenJD for letting go of this one – much appreciated! Note the asymmetry in the placement of the carinae, best noticeable from the top view. #2 Representing the Judith River Fm., a cornerstone of my collection, a 1st left premaxillary tooth of Dromaeosaurus albertensis. I just love the way the mesial carina ‘folds’ onto the lingual surface. #3 Another premaxillary tooth from the Judith River Fm., a Zapsalis abradens with prominent ridges. The mesial carina has a nice twist, the cross section looks rather symmetrical, so likely not a 1st or 2nd premax. Distal denticles are hooked towards the tooth tip, but no mesial denticles are present and the tooth is not recurved. So, for now it is labeled as cf. Zapsalis abradens after Currie and Evans 2019, but could eventually be re-labeled as Saurornitholestes langstoni.
  2. David Evans who described Acheroraptor shared this photo and information on a few notable Dromaeosaurid's. Thought it would be of interest to the Dino guys and others. I also show a hand next to an adult Velociraptor skull which gives a real life size comparison, since a lot of depictions and replicas sold are well oversized. Acherorapter is from the Maastrichtian of Hell Creek/Lance Formation Saurornitholestes shown from Campanian of Canada/Montana Velociraptor from Campanian of Asia David: How big was the Hell Creek dromaeosaurid Acheroraptor temertyorum (top)? It’s about 25% bigger than Saurornitholestes (middle) and 66% bigger than Velociraptor (bottom). For reference it’s about 15% smaller than Deinonychus
  3. Dino Dad 81

    Theropod Toe Bone

    Hey all, What do you think of this toe bone from Hell Creek? The seller marked it as Saurornithelestes with a "?" at the end. It's a tiny 0.5". What I thought might be diagnostic about it is the proximal end. I believe it has Toe 2 Digit 2 characteristics. But it also looks like the flatter top part of the proximal end (bottom part in this picture) may just be worn down or something--it doesn't look totally smooth. If you think there's anything to the Toe 2 Digit 2 hypothesis, then I assume it's theropod indet rather than Saurornithelestes--or is there a case for young Acheroraptor? For all I know, you'll think the proximal end simply has wear to it and it's not even from an animal with a sickle claw. Thanks,
  4. Dino Dad 81

    Saurornithelestes, Troodon?

    Hello and thank you for checking this out. I got this tooth a while back. It comes from the Judith River Formation and is about 8mm apical length. The serrations seem large to the tune of Troodon, but they're too worn to be certain that they point apically throughout the posterior carina. (It was sold as Pectinodon, but I'm not seeing that.) What do you think it is? Thanks!
  5. Dino Dad 81

    Hell Creek Raptor Tooth

    Hi all, This small 5/32" tooth came from Powder River, Hell Creek, Montana. The thought was that it's Saurornitholestes, but it comes off to me as having a awfully troodontid ind. look, no? It looks very curved for Saurornitholestes. The distal denticles seem like a big fit for a Saurornitholestes tooth (but maybe the tininess of it is throwing off my sense of scale) and, while the distal denticles look like they're significantly worn, it looks a little to me like they point upward throughout the CH (as opposed to only the denticles towards the tip pointing upward). I would think the attribute that most makes troodontid ind. questionable is the high density of the mesial denticles . But I thought I'd heard (even if just in TFF wisedom) that there's significant variability in the mesial denticles of troodontid from this area--even to the point of there being none, potentially (?). What do you think? Thanks!!
  6. ThePhysicist

    Saurornitholestes langstoni

    From the album: Dinosaurs

    Saurornitholestes langstoni Judith River Fm., Fergus Co., MT, USA ~ 9 mm crown height This tooth has wear facets at the tip/apex.
  7. ThePhysicist

    Saurornitholestes

    Identification: Dromaeosaurs have differently-sized serrations on each carina, the ones on the distal carina being much larger and pronounced than the mesial ones. The mesial carina also has a classic twist. Notes: This tooth has feeding wear facets on both the labial and lingual sides of the tip. Citation: SUES, HANS-DIETER, 1978. A new small theropod dinosaur from the Judith River Formation (Campanian) of Alberta Canada, Zoological Journal of the Linnean Society, Volume 62, Issue 4, April, Pages 381–400, https://doi.org/10.1111/j.1096-3642.1978.tb01049.x
  8. ThePhysicist

    Saurornitholestes mesial serrations

    From the album: Dinosaurs

    Saurornitholestes langstoni Judith River Formation Fergus Co., MT, USA
  9. ThePhysicist

    Saurornitholestes distal serrations

    From the album: Dinosaurs

    Saurornitholestes langstoni Judith River Formation Fergus Co., MT, USA
  10. Alex Eve

    Saurornitholestes tooth position?

    Howdy! This is a dromaeosaur tooth from the upper Dinosaur Park Formation. I’m pretty sure it’s Saurornitholestes, but based on the size (1cm L) and shape, is it possible to tell the position in the mouth? (Ex maxilla, dentary, predentary?)
  11. With the current pandemic I decided now was as good of a time as any to get some matrix from the Aguja Formation with the help of PaleoTex! This turned out to be a great decision as I was extremely lucky, finding about basically everything I wanted to, and more in only 5 pounds of matrix! I'll be sure to post pictures but I got numerous amia and gar teeth, along with atleast 36 gar scales. Tons of Crocodile teeth including a large Deinosuchus tooth. Several shark teeth and a partial hybodus spine, also several brackish water pycnodontid teeth and tooth pallets. 4 fish or salamander jaws with teeth. Regarding dinosaur teeth I got 17 Hadrosaur teeth, including 2 partially rooted. A partial Ankylosaurus tooth. 4 Therapod teeth including a perfect Saurornitholestes tooth and a Premax. My favorite find however was the Paronychodon tooth I found! I'll be posting that picture first! Highly recommend this matrix, but I was also told that most people don't find all this stuff, so keep that in mind aswell. Stay safe! Happy hunting! (ID's for these specimens done by lab manager)
  12. andy_mnemonic

    JRF Saurornitholestes langstoni tooth?

    I recently picked up this tooth labeled as dromaeosaur from the Judith River Fm in Hill Co, MT and I think it may be Saurornitholestes langstoni. Can anyone confirm the id for me? Thanks!
  13. Joebiwan3

    Unidentified theropod

    Next tooth up is a "unidentified theropod " tooth from the judith river formation in eastern MT....its CH 8 mm....it has 13 serrations per 3 mm on the posterior of the tooth and 16 per 3 mm on the anterior.......some of the pictures youll see what looks to be ribs on the side of the tooth, i thought zapsalis at first but i dont see the posterior as having a straight edge .....let me know what u all think after viewing the pics! @Troodon
  14. Joebiwan3

    Unidentified Theropod tooth

    Hey everyone i hope you all had a great holiday season....this next tooth in my collection was labled saurornitholestes from the hell creek formation from powder county MT. We know that the only two described raptors from there are dakotaraptor and acheroraptor so im curious to see what you all think of this one. Nanotyrannus perhaps? Unfortunately the anterior serrations have worn off which im sure will make id'ing this tooth difficult but anyway here it is. ....the CH is 9 mm the posterior serrations are 12 per 3 mm. @Troodon
  15. Next up in my collection is this one that was sold to me as a possible saurornitholestes langstoni tooth. From the Judith River Formation in Wheatland Co. MT. CH is 9 mm. Serrations are 15 per 3 mm on the posterior of the tooth and 23 per 3 mm on the anterior of the tooth. @Troodon
  16. I was hoping somebody on TFF might be able to point me in the direction of any scientific papers, research or information that members here might have put together regarding dromaeosaurid theropods from the Judith River formation. This is not really about identifying any teeth, though I do have one from that formation. I am starting to do my research for the education program and am looking for scientific information. From what I can gather, there is a possible Saurornitholestes species and of course the dinosaur I have seen referred to as Julieraptor, which is a interesting story all on its own. I have also seen Dromaeosaurus listed from that formation. I would like to sort out what is known and unknown from the formation and the best way to present our "raptor" tooth to the kids. Any help links or suggestions as to where I might find more information on this would be much appreciated
  17. Here's my Two Medicine formation collection from Montana. It's all Daspletosaurus besides one Saurornitholestes tooth. I'm hoping to get specimens of some of the Two Medicine herbivores in the future. Pics 2 and 3= Daspletosaurus tooth in matrix Pics 4 and 5= Daspletosaurus partial tibia Pics 6 and 7= Daspletosaurus toe bone partial Pics 8 and 9= Daspletosaurus vertebrae process Pics 10 and 11=Saurornitholestes tooth
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