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  1. I found this tooth on private property in the Lance Formation, and I wanted to know what y’all think. Dr. Bakker told me ceratopsian (Lepto if I remember correctly). He said it was one of the teeth oriented toward the front of the mouth. I’m inclined to believe him, but has anyone else seen this before?
  2. Hey everyone I am preparing a rib from the Hell Creek formation it isn't in the greatest of shape and I still had a long way to go but wanted to start thinking about maybe trying restoration for the first time and wondering what you guys recommend. Here is the startand here is where I'm at right nowwith the right side there will need to be some fill to the missing bone. My question is though with the degree of curve on the right end do you think I'm close to the head and should try reconstructing the head? I could be looking at the curve wrong too and just have the bottom of the rib, either way though is there any method you guys use in reconstruction to get the bone texture? Thanks for the help I'll continue updating this as I get further into prepping it.
  3. ThePhysicist

    Leptoceratops juvenile

    From the album: Hell Creek Formation Microsite

    A rooted tooth from a juvenile Leptoceratops, a smaller cousin of Triceratops.
  4. svcgoat

    Ceratopsian cheek horn?

    Not sure on formation yet will update when I find out more. Seller says it's a cheek horn.
  5. musicnfossils

    Mystery Dino Bone

    This looks like something ceratopsian or ankylo to me, if anyone has any idea let me know. Haven’t cleaned it I apologize but it isn’t super covered in sand. Dino park formation
  6. Ericlin

    Ceratopsian frill or horn

    Hello, I have this fossil, and I was wondering whether it is a ceratopsian frill or horn, it looks like a frill but seems to be circular. It’s from the Lance formation and measures about 2 inch in length. As always thanks!
  7. ThePhysicist

    Baby Leptoceratops

    From the album: Hell Creek / Lance Formations

    Triceratops's smaller cousin, this Ceratopsian lacked horns. Note the single root. This is a very small tooth, likely from a baby (the root being present also means that unfortunately this dinosaur did not survive into adulthood).
  8. Hi everyone! I think I'll skip the fluff and just get to my points on why I think that's what this one is. ID as Ceratopsian horn: The piece is from Powder River County, Montana. It measures 22.2 x 10 x 8.3 cm. The last two pics show the circular cross section and then blood grooves. The Bite Marks and comparison to a published specimen: Aside from a huge crescent shaped gouge on the distal end I have counted several individual scour marks. A similar specimen has been documented with the same huge crescent shaped gouge with individual scours in almost the exact same places. Here is a quick overview of the individual marks on this specimen and a comparison to the published specimen. I will go into each mark in detail. First is the published specimen as well as the website I saw it mentioned and the original article. My specimen: Main Scour Mark A: A Large Tooth from Tyrannosaurus rex (CH 7.5 cm) fits almost perfectly into MSMA. The mesial carina aligns perfectly with the serration mark. Smaller teeth would not fit. The tooth was found in Garfield County, Montana. Main Scour Mark B: MSMB with the tip of another large T-Rex tooth fit in. The mark measures 10.28 mm long and 7 mm wide. Like MSMA, it was created by the mesial edge of the tooth. The teeth used to fill each mark were photo'd in their approximate position showing them as roughly parallel. The marks are 6.9 cm apart. Both are in almost the exact same position and distance apart as the published specimen mentioned earlier. Secondary Scour Mark A: Very close to, but at an angle to MSMA. There is and area near the scour which might be a continuation though I am not sure. Without the questionable area it measures 13 mm long and 6.2 mm across. Secondary Scour Mark B: This scour mark isn't as deep as the others but is longer at 24.8 mm. Another Scour mark was documented in this are on the published specimen but was at a different angle. Identification of the Bite Marks as Tyrannosaurus rex: In the Hell Creek Formation of Powder River County three large species of Theropod dinosaur are known, Dakotaraptor steini, Nanotyrannus lancensis, and Tyrannosaurus rex. Given the size of tooth required to make MSMA, the best preserved of the scour marks in my opinion, I believe both Dakotaraptor and Nanotyrannus can be ruled out. The fit of a large Tyrannosaurus rex tooth in both size and shape into MSMA also provides evidence even beyond process of elimination of other species. What's more, the existence of a remarkably similar fossil of a Ceratopsian horn with both very similar damage morphology of the distal end and scour placement would indicate consistency in the interaction between Tyrannosaurus and large Ceratopsians. Okay, I had my fun playing paleontologist. So what do you all think? Any insight is greatly appreciated as always!
  9. Hello guys, I recently bought a triceratops ceratopsian frill fragment. The seller said it's a squamosal piece from Hell Creek Formation, Garfield County, Montana, USA. The size is 15x10x4,5cm I read several threads about frills to check authenticity and I see important characteristics on this piece. The blood vessels and blood grooves (a bit smaller than on other frill fragments I saw) are visible. Also the thickness is good. So in my view it looks genuine. What do you think about it? Thanks and have a nice weekend. Max
  10. Hello . Recently got this caudal vert from Hill county of judith river formation . Is this a hadrosaur or a ceratopsian vert ? Best Regards Guns
  11. musicnfossils

    Strange Claw

    Anyone see this before & maybe know what it is? Found this claw today and it has a weird spike on one side, and a bit of an odd shape too. I believe it’s ceratopsian but if it’s hadrosaur I’d appreciate the correction. DPF
  12. Dino Dad 81

    Ceratopsian Frill? Just rock?

    Hi all, I’ve been putting in time to working the clay matrix off of this bone/rock from the Lance formation in Weston, Wyoming. In the process, I’ve gone back and forth on whether it’s just a rock and no fossil to now thinking it may be a sizable chunk of ceratopsian frill. Any help would be much appreciated as I hate putting in the time and having to wonder if it’s even a fossil at all. If it is a fossil, how agressive do you think I should be about working matrix off vs leaving it as-is? Thanks!!
  13. musicnfossils

    Small Horn? Armour Spike?

    Found this guy today on what was otherwise a mostly unlucky hike. I’m leaning ceratopsian horn but I’d like a second opinion. dinosaur park fm
  14. musicnfossils

    Centrosaurus Nasal Horn?

    Found chunks of what I originally thought was frill but quickly realized I found a horn! Wondering if it might be from a centrosaurus, I know they’re frequently found here. It appears to have the same curvature of what a centrosaurus horn would have but could be another ceratopsian possibly. Dinosaur Park fm
  15. Daze

    Ankylosaur or Ceratopsian?

    Can anyone please ID this piece, @Troodon? Could it be an Ankylosaur osteoderm or maybe Ceratopsian?
  16. Fullux

    Triceratops frill?

    This piece was found in wyoming and was prepped in the field, described as a section of triceratops frill, is that accurate?
  17. Did horned dinosaurs, ceratopsians, use their horns in a defensive posture or did it matter at all and were really intended for other behavioral needs. Mark Witton tries to address this question, in his blog, with a new look using the behavior of modern animals. http://markwitton-com.blogspot.com/2023/02/horned-dinosaurs-vs-theropods-how-much.html
  18. I wish I had any documentation regarding this bone, perhaps we do but my mother never really got all too into it. My father was quite the odd guy, professional musician who always wanted to be a paleontologist. I lost him as a kid in 2008 but being 20 now, I am trying to get in touch with USF, about an hour and a half away from me to see if their schools department on this stuff can help me learn about it. To my knowledge it is a ceratopsian leg bone of sorts. Here's a link to a reddit thread with pictures on it, I haven't been sleeping well and cba formatting them on this post correctly.
  19. Tj1977

    Hadrosaur or Ceratopsian Jaw?

    I found this in the Judith River Formation years ago but have never got it fully identified as a Hadrosaur or Ceratopsian jaw piece. Any help will be appreciated.
  20. Hello Could someone please give their opinion regarding if this an authentic Ceratopsian bone? Per the seller it’s from Wyoming. Thank you!
  21. Hello, this is a very small tooth that I had a hard time taking pictures of. I need a new camera or phone able to take nice up close pics!! This tooth was found at a site in Wyoming that I am unsure whether it is Lance or Mesa Verde formation wise. Anyway, this tooth is complete and very nice looking. I believe it is Ceratopsian but as to which species I am unsure. You can see the size of it as compared to my finger (sorry, I work with oil based materials and my fingers are stained up!). Please let me know what opinions y'all have!
  22. Hello, I found this a few days back and need some help with it. It is actually a double sided tooth. I was thinking that it is probably in the Ceratopsian family?? Thanks for any help. Judith River Fmtn, Hill County, MT.
  23. Guns

    Yixian formation tooth

    Hello everyone , need some help in ID of this tooth from Liaoning Province , Yixian formation , China Size : 0.6 " Thank in advance Guns
  24. First piece I suspect is frill and it’s about 2-2.5 inches long. Second is what I think is a toe bone and is 1.5-2 inches long. Thanks! Found in horse shoe canyon Alberta.
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