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  1. Nanotyrannus35

    Possible Ankylosaur or Nodosaur Osteoderm

    I have this piece of bone that due to the texture and shape I think might be an ankylosaur osteoderm. It also seems like it might have some predation, shown by the circled area. It's from the Lance fm of Weston Co. WY. Thanks for any help.
  2. 'Extremely rare' fossilized dinosaur voice box suggests they sounded birdlike (msn.com) s42003-023-04513-x.pdf The "extremely rare" discovery of an 80 million-year-old fossilized voice box that belonged to an armored dinosaur reveals that the ancient beast may have sounded more birdlike than experts previously thought, new research suggests.
  3. Daze

    Ankylosaur or Ceratopsian?

    Can anyone please ID this piece, @Troodon? Could it be an Ankylosaur osteoderm or maybe Ceratopsian?
  4. I bought this Ankylosaur osteoderm scute awhile back. I hope the narrow down the species. The scute was found in the Judith River Formation in Aberta Canada. It is legally collected and was orginaly sold in the late 80's. There are several Ankylosaur species in the Judith River formation. Hope someone can narrow it down to one Its 17 cm or 6.7 inch. Thanks in advance!
  5. ThePhysicist

    Ankylosaurus tooth

    From the album: Hell Creek / Lance Formations

    One of my favorites as a kid - the archetypical Ankylosaurian - Ankylosaurus. Ankylosaurus teeth appear to be fairly uncommon in Hell Creek - some paleontologists have suggested that Ankylosaurus may have lived in the highlands or nearer the coast of Laramidia. Most "Ankylosaurus" teeth you see for sale are actually Nodosaurid (cf. Denversaurus), for whatever reason, they seem to be far more common. Ankylosaurus teeth also often have wear facets, as this one does. The denticles give their teeth a "leaf-like" appearance. Given their shorter stature, Ankylosaurians probably were low-browsers.
  6. Hello, I am posting pics of several Ankylosaurid teeth I found in the Mesaverde Formation in Wyoming. Can anyone ID them as to a certain species? "NOTICED PICS LOADED UP OUT OF ORDER, 2ND PIC GOES WITH LAST ONE" I know I need better pics but my current phone takes terrible close up pics. I know that you can buy a lens that you can attach to the ohone for pics; does that work well? Anyway, these are from at least 2 different sites and we're found over the course of a couple of years. Thanks!
  7. ThePhysicist

    Ankylosaurus tooth

    From the album: Dinosaurs

    A rare tooth from the Hell Creek formation. Curiously most Ankylosaurian teeth you see online are actually Nodosaurid. This one is the Ankylosaurus.
  8. ThePhysicist

    Ankylosaurus tooth

    From the album: Hell Creek / Lance Formations

    The denticles and enamel of this Ankylosaurus tooth are exceedingly well-preserved.
  9. Found in wise county in the puluxy formation..i believe this would classify as a replacement fossil ..maybe trace but its pretty apparent the skull structure is identical.
  10. Opabinia Blues

    Judith River Ankylosaur Teeth

    Hi all, A bulk purchase of channel deposit material from the Judith River Formation of Montana has yielded these teeth, each of which appears to have some ankylosaurian affinities. I have read @Troodon’s guide on this very topic, but alas I still would like a second look at some of these teeth. I do not have the capacity to take very good macro photos, but I hope that these are passable at least for an initial glance. The scale of each tooth. The numbering on the bottom is centimeters while the numbering on top is in inches Tooth 1: I’m 99% sure t
  11. Ginger0412

    Is this the tail of an ankylosaurus?

    Is this the tail of an ankylosaurus? If anyone knows, please let me know! Thanks in advance!
  12. Rikache

    Ankylosaur Scute or Pachy Armor?

    Hi there everyone! This one might be a bit of a tough one. I came across this listing for a possible partial ankylosaur osteoderm or pachycephalosaurus skull armor and was wondering if anyone could help positively ID the specimen. The fossil was found on private ranch land in Harding County, South Dakota. The specimen is small and obviously a fragment so I’m not expecting any clear answers; but in the past I have come across whole ankylosaur osteoderms that looked very similar in terms of texture and coloring, so my untrained eye is inclined to lean towards that conclus
  13. Hi all, I saw this interesting specimen online. It is labeled as Ankylosaur dermal scute, was found in the Hell Creek Fm., Hill County, Montana. Size is 4,8 cm x 3,2 cm (1.88" x 1.26"). These are the pictures provided: What strikes me about this specimen is the shape of the bony base and the grained surface. My knowledge about osteoderms is rather limited, so I was wondering if anyone can support or refine the given ID? The only image I found so far that resembles that shape, as opposed to the flat sided scutes, is that of an thoracic osteoderm (https
  14. WillEvans6097

    Ankylosaurus Tooth?

    Hello fellow fossil fans! I've recently purchased this tooth online and I'm struggling to determine whether it is actually an Ankylosaurus tooth (as advertised) or whether it is a Nodosaur tooth instead. The description is as follows: "0.5" ANKYLOSAURUS FOSSIL TOOTH LANCE CREEK FM CRETACEOUS DINOSAUR WY COA & DISPLAY Location: Lance Creek Formation, Wyoming (Private Land Origin) Weight: 0.2 Ounces Dimensions: 0.5 Inches Long 0.4 Inches Wide, 0.2 Inches Thick" I would really appreciate anyones help to figure this out!
  15. Fossil Maniac

    Ankylosaur tooth or nodosaur tooth?

    Hello! I recently bought this ankylosaur tooth (in fact it arrived today) and I was wondering if it could be from a nodosaur. Thank you! (Judith river formation hill county Montana)
  16. PaleoNoel

    Ankylosaur armor?

    I was hoping some folks on the forum could confirm this ID for me. I found this interesting little piece in the hell creek formation of South Dakota back in July with Paleoprospectors. I was told by one of the guides that it could potentially be a piece of skull armor from a young ankylosaur. I want to know what everyone here thinks.
  17. FF7_Yuffie

    UK Ankylosaur ungual?

    Hello, any help with this? Advertised as a possible ankylosaur ungual. From Hastings Subbgroup, Wealden Clay, Sussex. Description says the grooves in the bone surface are consistent with thyreophoran unguals. Yet, when I compare the US ankylosaur unguals--I don't see a resemblance at all. Could be a quite worn one? 1.8 inches. Cheers
  18. gturner333

    Is this an ankylosaur tooth?

    I found this in some matrix from the Lance Formation in Wyoming and wondered if it is an ankylosaur tooth. The hash marks are 1mm. Thanks for any help.
  19. (EDITED 5/24/22) to add an undescribed Nodosaurid to Hell Creek/Lance Fm. I see a lot of misunderstanding on what is being sold online at auctions and dealers sites. Some have it correct but most mix up the terminology. So here is Anky 101 aimed at Novice collectors and I will keep it simple. What you see sold in most markets are teeth from late Cretaceous North American locations mostly Montana, Wyoming and the Dakota's so I will focus on those areas. (Hell Creek, Lance, Two Medicine and Judith River Formations) Teeth from Canadian locations will have similar characteristics.
  20. Hello . Is this tooth a Ankylosaur or a Nodosaur tooth ??? Locality : Hill county , Judith river formation Thank in advance !
  21. Seanrad09

    Hell Creek Bone. Ankylosaur?

    Another one looking to ID. Judging by some of this bone’s characteristics, me and some friends are leaning ankylosaur. It looks similar to a skull piece I saw posted online as well. What are your thoughts?
  22. Hi ! . need a bit of help ID this tooth from hill county , Judith river formation I am not sure if its pachycephalosaur or ankylosaur tooth . Best regard Guns
  23. Hi everyone, I wanted to get some opinions on this piece I found in Montana's Hell Creek formation this past summer. My initial thoughts were that it was a ceratopsid skull fragment. It was a fossil I was planning on selling, but before I do I wanted to rule out the possibility that it was a piece of ankylosaur osteoderm as I have significantly less material from that clade of dinosaurs. The dimensions are about 8 cm by 7 cm.
  24. Soto-Acuña, Sergio; Vargas, Alexander O.; Kaluza, Jonatan; Leppe, Marcelo A.; Botelho, Joao F.; Palma-Liberona, José; Simon-Gutstein, Carolina; Fernández, Roy A.; Ortiz, Héctor; Milla, Verónica; Aravena, Bárbara, 2021. Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile. Nature: 1–5. doi:10.1038/s41586-021-04147-1. ISSN 1476-4687. Links: This bizarre armored dinosaur had a uniquely bladed tail weapon (nationalgeographic.com) This Dinosaur Found in Chile Had a Battle Ax for a Tail - The New York Times (nytimes.com) Stegouros is quite unus
  25. Hi, does anyone have or know where I can view images of a ankyloaurus/nodosaur foot but especially the ungals? Having a hard time finding images for a comparison.
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