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  1. I purchased these as Ingenia yanshini which I think became Ajancingenia, which then became and is currently Heyuannia. The formation provided is the Djadochta Formation, but that doesn't seem right since Ingenia/Heyuannia is not found there as far as I've checked. Unfortunately, there isn't provenance other than Mongolia attached to them to say whether they come from the Barun Goyot Formation where Heyuannia yanshini is found. While I'm not necessarily doubting the original ID, I just don't really know. I'm not expecting a positive or diagnostic ID to the genus level, but I wanted to at least know whether or not I can label this to Oviraptoridae indet., possibly Heyuanniinae indet. The original ID is a bit of an odd one, but it might have just been one of the few oviraptorids described at the time. Last I checked, there are now tons of recently described oviraptorid genera in Mongolia and China. The pair of phalanges with supposedly the semilunate carpal attached which I think is the smaller section? I know one of them did have glue in-between them when I lightly smeared it with acetone using a cotton swab. They are associated coming from the same sandstone block, apparently along with other shattered phalanges. Although I don't know if these actually came from the same animal since one looks ever so slightly larger. There is some sort of clump of sand or crystalized piece attached, as well as light beige or cream colored matrix. Not sure if that narrows down a formation, probably not, but I do see a lot of matrix from Mongolia tend to be red-ish color similar to the Kem Kem Beds. Any input is appreciated. There's probably a lesson to be learned here . . .
  2. JoetheJerseyGuy

    Big Brook - Fossil Id

    Big Brook, no cutting edge, worn. Different then rocks or concretions in the area.
  3. I found this piece of late Cretaceous petrified wood in the Dawson formation of Colorado. Most of the piece however is this grey ash colored rock and I was just wondering, 1. What type of rock is it? I’m willing to do tests such as scratch and hardness if it will help. 2. How was it formed? 3. When was it formed? Did it form during fossilization or much more recently? Thanks for any and all help.
  4. JoetheJerseyGuy

    Tooth - Big Brook NJ

    Tooth found in Big Brook, NJ. Sheared down the middle so the back provides a cross section.
  5. Titan

    Titan's Preps

    Over the spring and early summer I got my prep lab set up and am having a blast with it so I wanted to start sharing some of my preps with the forum. Here we go! Fish vertebrae, possibly Xiphactinus: Late cretaceous. The larger of the two, in situ under a few inches of water. The smaller was about a foot away. Preprep: I tore them up getting them out of the matrix - bad collecting on my part as I could have been more careful. Post prep: I used baking soda as blast media at about 25 psi and had some trouble trying to clean out the matrix from the vertebra body without burning through some of the bone. Instead of continuing to try to remove it I decided to leave it.
  6. David in Japan

    Shark cartilage?

    Dear TFF friends, It's been a while since I visited our fossil lovers community. I hope you're all doing well. Few months ago, I went to my favorite late cretaceous spot in Japan. Himenoura formation is a marine formation from the late Cretaceous (Santonian) where ammonites, bivalves, shark teeth, and crustaceans can be found. Last time I went there, I found the following fossil. In is quite small, and at first glance I thought it was some kind of bone fragment or small tooth's enamel negative but after observing it under microscope, I was able to see that it was multiple fragments (some still inside the matrix) of a quite thin "kind of bone" with this kind of hexagonal pattern on the outside (cf photo) and vertical columns in cross section (wasn't able to take picture, will post pictures as soon as I can). I may have an idea of what it could be (possible shark cartilage?) but I would like to hear your opinion about that fossil. Thanks by advance, David
  7. Troodon

    Polar Dinosaurs - Alaska

    A new study reveals that nearly all types of dinosaurs that were present in the Arctic reproduced in the region, and remained there year-round. These dinosaurs encountered ~4 months of darkness per year, temperatures below zero, and snow https://www.cell.com/current-biology/fulltext/S0960-9822(21)00739-9?utm_source=EA
  8. Nothing new but this was presented at the SVP conference late in 2020 and could be of interest to some. Nothing has been published the and all based on one isolated humerus. Additional discoveries are most likely needed to demonstrate they were in that fauna. A POSSIBLE LAMBEOSAURINE (HADROSAURIDAE: DINOSAURIA) HUMERUS FROM THE LATE MAASTRICHTIAN HELL CREEK FORMATION OF SOUTH DAKOTA Rolleri, L., Gates, Terry A., Zanno, Lindsay E. North Carolina Museum of Natural Sciences, Raleigh, North Carolina, U.S.A. Both hadrosaurine and lambeosaurine hadrosaurs were common components of Campanian faunas in North America. However, to date, only hadrosaurines (e.g., Edmontosaurus annectens) are definitely known to have survived into the late Maastrichtian on the continent. This is in contrast to the European and Asian record, where lambeosaurine species have been described from Maastrichtian formations (e.g., Amurosaurus, Charonosaurus, Blasisaurus), some of which are hypothesized to be closely related to North American species from the Campanian. Intriguing evidence of a lambeosaurine from the widely prospected Hell Creek Formation (late Maastrichtian) was presented nearly two decades ago, but these data have not yet been published. Here we describe a large, isolated humerus (NCSM 21814, North Carolina Museum of Natural Sciences) discovered in 1998 in Harding County, South Dakota, that may provide additional evidence on this topic. NCMNS 21814 is robust, bearing a pronounced, triangular deltopectoral crest (DPC). The general proportions of this specimen do not compare well with Edmontosaurus, the only currently accepted hadrosaurid from the formation, and some aspects, particularly a robust well-developed DPC, resemble the morphology of lambeosaurines. In order to more accurately compare NCSM 21814 to other hadrosaurids, we utilized several sources of previously published humeral measurements. In the ratio of DPC length to humeral length, NCSM 21814 is most similar to saurolophine taxa such as Edmontosaurus. However, using morphometrics that include the breadth of the DPC as a variable, NCSM 21814 aligns with lambeosaurines. In addition, the shape of the DPC of NCSM is unusual, in being more triangular than quadrilateral. This morphology may represent an extreme for Edmontosaurus, or may be a feature of a new taxon. Regardless, the discovery of a morphologically atypical hadrosaurid humerus in the otherwise widely sampled Hell Creek Formation, demonstrates higher morphological disparity than © 2020 BY THE SOCIETY OF VERTEBRATE PALEONTOLOGY 285 currently appreciated amongst hadrosaurids within one of the best studied Late Cretaceous ecosystems.
  9. Ernest

    Southern Alberta fossil I.D.

    Found this on an outcropping in southern Alberta with various other dinosaur fragments. Never seen this before not sure what it could be. Any suggestions would be appreciated
  10. Dakotaraptor steini was found in a multi-species bonebed in the Hell Creek Formation and lots of questions have been raised around this material since it was described. Elements of the holotype were found to belong to a turtle (furcula) and Anzu (Tibia) and questions raised on others. To make matters worst the holotype is not available for study.. So its been shrouded in controversy. A good review of where we currently stand is presented in the attached Twitter thread
  11. Hi all Some of you may remember that I used to (and still do) research on fossils from the Late Cretaceous chalk of Denmark... Now there are 2 main chalk sites in Denmark, Møns Klint and Stevns Klint. My work focuses on the stuff from Møns Klint, but in all honesty there's some spectacular fossils coming out of both localities. One thing that both Møns and Stevns have in common is that fossils of mosasaurs (giant lizard-like marine reptiles) are extremely rare, with only a small handful of specimens found every year. A few years ago, I went to the Geomuseum Faxe (south of Copenhagen) to check out one of the finest mosasaur specimens from the Danish Chalk. It's roughly 67 million years old, and was found by amateur collector Peter Bennicke at a small quarry close to the Stevns Klint cliffs. The specimen is preserved in a large-ish block of chalk (~0.7 metres wide). The whole fossil consists of about 7 or 8 teeth, and some small cranial and jaw fragments. Yeah. Mosasaurs are so rare in Denmark that the best mosasaur fossil is a small association of a few teeth and bone bits. These remains are from Plioplatecarpus sp., one of the smaller fish-eating mosasaurs. The find was considered so rare that it was declared as part of the "Danish Natural History treasure trove" (Danekræ, catalogue Nº DK-1048). The museum where the mosasaur is kept (on loan from the natural history museum in Copenhagen). The chalk quarry (Stevns Kridtbrud) where the mosasaur fossil was found. Here's the Plioplatecarpus specimen in all its fragmentary glory! Most mosasaur fossils in Denmark are in the form of single isolated teeth, so this find is especially cool because it's one of very few (2-3) specimens that consist of multiple associated bones/teeth from one individual. This one would've been roughly 4-5 metres long, and would have ate small to mid-sized fish such as Enchodus. By the way sorry for the not-so-great photo quality, it's kinda difficult to take good pictures from behind an exhibition case... Best-preserved teeth. Tiny little teeth... And a small scrap of bone, probably cranial. More bone fragments... So yeah, a few associated teeth and bits of bone - for something so rare, this one's pretty cool. Hopefully I can find something like that, at Møns Klint this time, when I go out for this year's fieldwork! Let me know what you think about this nice mosasaur specimen!!
  12. JoetheJerseyGuy

    Big Brook, NJ - Bones

    Beyond the shark teeth I acquired these two bones from a recent trip looking for fossils in Big Brook, NJ. Not sure how to differentiate if this is recent or from the Late Cretaceous associated with the others fossils found in the brook.
  13. When looking on a muddy day in the maryland late cretaceous marine site. Found a small 2 inches 5-6 cm long bone. all help will be appreciated. I am not sure what bone it is, let alone what species. Like most bone from this site the surface texture is in general rough.
  14. Edmontosaurus annectens may have been the largest dinosaur in the Hell Creek/Lance Formations not T rex. Here is an article that gets into the specifics. https://thesauropodomorphlair.wordpress.com/2021/02/10/size-of-the-duck-titans/
  15. I found this specimen along with some other fossils during a fossil hunt. This vertebra is very peculiar and unique, due to its small size, and it’s composition. It is completely permineralized by hematite, making it feel much heavier than the average rock. It almost feels like a chunk of metal. Probably belongs to one of the endemic hadrosaur species of the Cerro del Pueblo Formation, such as Velafrons coahuilensis, or Latirhinus uitstlani.
  16. I'm offering for trade about half a gallon of microfossil matrix collected from Post Oak Creek, Sherman, TX. It's rich in marine fossils from the Late Cretaceous Interior Seaway (Eagle Ford Group ~ 90 Ma). I cannot guarantee what you will find. I however can comment on what you can find based on my experience with this site. Sawfish oral teeth are very common. You may also find a variety of sharks' teeth, with about 8 genera that I've found so far in similar matrix (Squalicorax, Cretoxyrhina, Cretodus, Cretolamna, Ptychodus, Scapanorhynchus, Hybodus, Cantioscyllium, ...). Reptile teeth are uncommon. You can find a few larger shark teeth in the coarser portion, but they will likely be incomplete. I also have a small sandwich bag partly full with finer matrix (basically sand) which should contain small prizes like shark denticles. Pleistocene fossils are also mixed in, so you can find mastodon enamel next to a Cretaceous shark tooth. There is no processing required; virtually all of the fossils are loose in the gravel. I will ship to the continental US only. See this album for a more comprehensive view of the kinds and quality of fossils you may find. Here's what I've found before, hunting matrix like this: * Shark teeth, vertebrae, and denticles (~ 8 genera) * sawfish oral/rostral teeth and denticles (~ 2 genera) * fish teeth and vertebrae (Enchodus, Hadrodus) * guitar fish teeth, and denticles(?) (Rhinobatos, others) * squamate reptile teeth (mosasaurs, coniasaur) * crustacean claws/bits * clams/shells * pleistocene mammal (mastodon enamel, vole, etc.) I'm looking to trade for dinosaur-bearing micromatrix (doesn't need to be processed). For example, from Hell Creek Fm., Lance Fm., Judith River Fm., or Two Medicine Fm. I'm also open to other unlisted formations. Alternatively, if you have a decent dromaeosaur tooth you're willing to part with, I'm all ears. Please PM for offers or additional information. Thanks for looking!
  17. A new small dromaeosaurid dinosaur, Shri devi, from the Late Cretaceous deposit of the Barun Goyot Formation at Khulsan, Mongolia, is described here. Pretty cool unfortunately no skull but teeth should be small and very similar to Velociraptor Paper provides a good reference source to ID dromaeosaurid bones from other regions http://digitallibrary.amnh.org/handle/2246/7251 Check out that Digit II killing claw
  18. RooBug

    Hell Creek Fossil ID Help

    Hello all, it's been a very long time and I'm posting from my phone in an area with no wifi, so I hope I've followed all the rules as best I can. I was out fossil hunting in the Upper Hell Creek in eastern Montana last year, and found this bone. (Sorry for the images, I will not be able to retake them for months.) It was found in a sandy mudstone and appears to be hollow (and very crumbly). Its about 10 inches long.My best guess is a Struthiomimus femur, but if anyone knows different please let me know. Thank you for any help you can give!
  19. Calcanay

    Hell Creek vertebra

    Hello! I got this dinosaur vertebra from Hell Creek (Montana) a few years back. It was sold to me as a Triceratops vertebra but I don't know how that ID was made. It's not in the best condition (has moss(?) on it and has been broken and then glued back together) but it is about 13-14 centimetres across so it is clearly from a big dinosaur, but there were plenty of those in Hell Creek (even two large ceratopsids - Triceratops and Torosaurus). Looking for any insight into how an ID could be made here and if Triceratops (or even just ceratopsid) is correct
  20. Praefectus

    Tyrannosaur Tooth

    Premaxillary tooth EDIT: Changed from Tyrannosaurus rex to Tyrannosaurid indet.
  21. Praefectus

    Indeterminate Tyrannosaur

    Dimensions: CH = 41 mm CWB = 10 mm CBL = 16 mm MC = 18 denticles/5 mm DC = 14 denticles/5 mm DSDI = 1.29
  22. val horn

    unknown jaw pieces

    In a late cretaceous marine formation I found two little pieces of jaw. I would like help in id if possible. One is maybe 2.5 cm in length and the other 3 cm, both have the ragged texture of almost everything from this site. I wonder (hope) if the upper is croc, and if the lower is a small mosasaur. It does not match the typical fish jaws that I find because of the sharp curve to the teeth. Help and ideas will be appreciated.
  23. Hello, My 9 year old son found this cool jaw section. It may be coincidental, but beside it was an ankylosaur tooth, partially rooted. We are unsure if it was associated. Perhaps someone will find this interesting or know more. Will post more photos if necessary.
  24. I recently found this at Big Brook in NJ, USA. I am not sure what this is. The outer layer appears to have a spiral formation towards one end. It's just about 1 inch long (maybe a little less). Thanks for any help!
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