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  1. ThePhysicist

    Pachycephalosaurid tooth

    From the album: Hell Creek Formation Microsite

    A river-tumbled pachycephalosaurid medial (cheek) tooth. Illustration adapted from Fanti & Miyashita 2009. Fanti, Federico and Miyashita, Tetsuto. “A high latitude vertebrate fossil assemblage from the Late Cretaceous of west-central Alberta, Canada: evidence for dinosaur nesting and vertebrate latitudinal gradient.” Palaeogeography, Palaeoclimatology, Palaeoecology 275 (2009): 37-53.
  2. Hi everybody, Today I bring you pictures of what is allegedly a Pachy tail vertebrae with intact processes. I studied what has been found from Pachycephalosaurus and I'm struggling to place this bone along the tail, which is what the seller is claiming. I don't see where the processes are swept back like this one is. Could this be a different dinosaur? The same seller also has a Pachycephalosaurus rib which I'm also trying to figure out how to ID. Any help is appreciated.
  3. andermoo

    Pachycephalosaurus Tooth

    Very blessed to walk to a microsite and start my day finding this bad boy is sitting on top of the sand. Turns out, eastern Montana's winds are good for something!
  4. Daze

    Pachycephalosaurus tooth?

    This is being sold as a Pachycephalosaurus tooth from Hell Creek Formation, Montana, USA. Size 10mm / 0.4" I find it hard to distinguish between Pachycephalosaurus, Thescelosaurus and Ankylosaur/Nodosaur teeth, is this really Pachy?
  5. ThePhysicist


    From the album: Hell Creek / Lance Formations

    A river-worn, shed Ornithischian dinosaur tooth found in a channel deposit. Despite its rough shape, the prominent central ridge and denticles make me think it's Pachycephalosaurid.
  6. musicnfossils

    Pachycephalosaurus Skull Cap?

    Thinking I got a juvenile pachy skull cap here. Can anyone confirm?
  7. Hi everyone! Came across this caudal vert today and it really peaked my interest. Would love to know your guys’ thoughts about its ID and whether it belonged to a pachycephalosaurus or thescelosaurus. Sellers Notes: Tail vert belonging to thescelosaurus or pachycephalosaurus. Found in Eastern Montana (Hell Creek Formation) Thanks everyone!
  8. Dino Dad 81

    Pachy node

    Hey all, Does this 3" specimen from the Hell Creek of Powder River co, MO look like a big node or like a section of dome?
  9. TeethCollector

    Pachycephalosaurus spike cluster

    Pachycephalosaurus skull fragment, also known as Pachy spike cluster, from Hell Creek Formation of Carter County, Montana. I was surprised by its weight and size when I received it. Slightly bigger than 2.5 inches diameter.
  10. caimano

    Pachycephalosaurus vertebrae

    Hello everyone, I'd like to submit this vertebra to you to understand if it really belongs to packycephalosaurus and possibly if in your opinion how much it has been reworked. Indications on the label: Dimensions: 125mm Origin: Hell Creek Formation, South Dakota, USA CRETACEOUS-Upper Cretaceous, Maastrichtian (66.0-72.1 million years) Thank you very much
  11. This is being sold as a Pachycephalosaurus skull piece, the bumpy section of the skull rim that borders de Pachycephalosaurus dome. It's 65mm, no locality mentioned. I'm not an expert, but the structure and color doesn't look right to me. Opinions?
  12. Hi! I am an new member. I have been collection for awhile and just started on buying more valuable pieces. A friend adviced me to check this Pachy toe on the forum. The main question is: is it an composit or - as the seller told me - associated? Background information: - Found in Garfield County (near the city of Jordan), Montana by the landowner. - The bones were found in the same hillside (spilling down a little wash). No other Pachy material was found nearby In one picture I the small toe bone is removed (maybe this is the mix-up). Hope you can help! Thanks in advance! Best Regards, Mike Jolink (mikejk_fossils on Instagram)
  13. Hi all! I am relatively new to the forum as well as to collecting but I have put together a small collection of various specimens over the last year. This collection will keep growing and I will continue to post when I get new specimens. I have some more small specimens but for now I am only posting a selection of my collection. Enjoy! -Ben
  14. Has part of the articulating surface and is from the Hell Creek Formation in Powder River County Montana. It's about two inches.
  15. carch_23

    Pachy ungual claw?

    Hi all, would like to ask your opinions on these claws i purchased labelled as Pachycephalosaurus Foot claw (Juvenile) from Powder River Montana. Ive just seen some threads where some mistake Thesc claws with Pachy claws due to their similarities I guess. Just wanted to make sure or confirm the species of these little guys. Cheers!
  16. MedicineHat

    Pachycephalosaur skull cap?

    I found this piece while surface collecting along the red deer river. East of dinosaur provincial park boundary. Its weathered but very sturdy. I've looked at other skull caps and the undersides look different. This doesnt have all the brain case structures so I was hoping for some help on the ID. Thanks
  17. FF7_Yuffie

    Pachycephalosaurus vert

    Hello, Another possible Pachy vert I'd like to add to probably add to my collection--if it is a pachy and not something else. It measures 4.4cm by 4.1 cm and is 4cm thick. It is described as a caudal vert and is from Hell Creek, Powder River County, Montana. Many thanks
  18. Two more verts that I am interested in getting. But, figured I would check before commiting. First one is described as a Pachycephalosaurus tail vert, but looking online, it seems pretty difficult to tell these from other small dinos like Thescelosaurus. So, any thoughts would be great. It is 2.6 cm long and described as being from Late Cretaceous, Lance Creek Formation, Niobrara County, Wyoming. Second is just described as dinosaur vertebrae. Possibly Dacentrurus (which is a type of stegosaur apparently) From Kimmeridge Clay, Dorset. It is 10cm by 9cm by 4.5 cm. Seller says he confident it is a dinosaur and not a plesiosaur because of the open, large bone cells. Hope these look good, Pachycephalosaurus is, along with Baryonyx, my favorite dinosaur. Thanks as always.
  19. Seller is calling this a Pachycephalosaurus wyomingensis 12 mm does not look right. It's a Nodosaurid right? Hell Creek Fm, Jordan
  20. Joseph Kapler

    Tooth Identification

    Are these Pachycephalosaurus teeth or Thescelosaurus teeth? From what I have read, they seem to be Thescelosaurus teeth, although they were labeled Pachycephalosaurus by the colector. I do not see the promient center ridge (on either side) as shown in many photo of Pachycephalosaurus teeth
  21. Hello! I see this 3 pachycephalosaurus claws. The seller told me that are natural and not restored. Are restored? Wich one has better quality? Thank you so much!!
  22. Because it was the first time for me to see some teeth from the Hell Creek Form. in Montana here in Germany at our local fair (and I am quite at the beginning with my collection of dino teeth) I purchased the following teeth. According to the seller both are from the "Hell Creek Form., Badlands, Carter County, Montana". The first tooth is labeled as "Thescelosaurus garbanii". Is this correct and how can the teeth of T. garbanii and T. neglectus be distinguished?
  23. PaleoNoel

    Longtime WIP Wrapped Up

    It's been a while since I've posted on the re-creation thread and I'm proud to present my pachycephalosaurus which I started last spring and have now finished. Started with just a pencil, color was added tonight.
  24. A few months ago we welcomed a new member to the forum from Los Angeles, CA. @samtung like several members here has the kind of unbelievable artistic skills that I'd give my right arm for (I am left handed ). In his introductory post he showed some of his paleoart that he'd been working on: I noted with great interest that one of the creatures he displayed in that post was a nice Pachycephalosaurus wyomingensis. I've always had a soft spot in my heart for this hard-headed dinosaurian since I was a kid. I doubled down on my interest in this species when my wife and I were fortunate enough to meet-up with @jpc in Wyoming back in the summer of 2017 to collect some dinosaur bones on one of the private ranches with Late Cretaceous exposures. We were lucky enough to find an interesting dino tooth that was identified here on the forum as coming from P. wyomingensis. http://www.thefossilforum.com/index.php?/topic/78217-wyoming-fossil-hunting-adventure-september-2017/&do=findComment&comment=825238 This specimen among many others from that trip were labeled and packed away. I'd wanted to display this cool tooth in a more interesting way and seeing Sam's art gave me the idea I'd been waiting for. I contacted him and inquired if he'd be amenable to a commission for a nice drawing to go with this tooth. Another roadtrip last year which involved a visit to the Royal Ontario Museum in Toronto provided another piece of the puzzle. I took some photos of the mounted cast of "Sandy" the pachy and forwarded this to Sam with the idea of showing the skull which (with open mouth) features the fang-like tooth I had found in Wyoming and accompanying this with a representation of the entire critter in life pose. I was not disappointed as I had not misplaced my trust that Sam could pull this off with talents beyond my comprehension. I had a custom mat and non-reflective glass made to fit a standard 11x14 frame and then played with ideas for placing the tooth. One idea was to put the tooth in the negative space to the left of the skull drawing but the tooth was thick enough that I'd have to double or triple mat the print to build enough "shadowbox" space to fit the tooth under the glass. I thought of punching a clean 1 inch hole into Sam's print and somehow recessing the tooth into the print. The risk of messing this up and destroying Sam's artwork prevented me from attempting this method. I kind of liked the idea of allowing the tooth to be (carefully) touchable and thought of mounting it over the print where I'd thought of placing it recessed. It sat on my desk for some time while I pondered this. Unfortunately, this placement over the top of the glass caused too much of a 3D shadow onto the print and it just wasn't working. I have no artistic skills but I have a reasonable eye for crafty constructions. In the end (though I may change my mind at some time), the tooth found a home centered at the bottom of the mat. This now hangs at eye level in the area leading between my kitchen and dining room (right above the mounts I made for some of my Mazon Creek fossils that I made some years ago). Having friends over for dinner in a little while so I wanted to get this completed and hung to show off to my friends. I'm happy with the results. Despite not being able to draw a recognizable stick figure, I know enough to spot talent when I see it and enlist those with such talent to make my dreams reality. Cheers. -Ken
  25. fossilsonwheels

    Pachycephalosaurus toe bone ?

    Seller lists this as a Pachycephalosaurus toe bone from Hell Creek formation, South Dakota. It is 1" long x 7/8" wide. That is all the information the seller gives. I have no clue how to ID a Pachy toe so i figured it was a good one to put on the forum and get help from more knowledgeable collectors
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