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  1. My son picked this up while visiting his grandpa. We aren’t sure but know it’s probably a concretion. Would love it to be a real egg!
  2. ‘Alien goldfish’ may have been unique mollusc, say scientists Nicola Davis, The Guardian, September 22, 2022 New clue found in 'alien goldfish' suggests it may have been a mollusk by Bob Yirka , Phys.org The open access paper is: Conway Morris, S. and Caron, J.B., 2022. A possible home for a bizarre Carboniferous animal: is Typhloesus a pelagic gastropod?. Biology Letters, 18(9), p.20220179. Another paper: Conway Morris, S., 1990. Typhloesus wellsi (Melton and Scott, 1973), a bizarre metazoan from the Carbonifer
  3. I recently had the opportunity to purchase some jacketed fossils from a ranch in Garfield County, Montana in the hell creek formation. I bought 2 jackets, one with several small ribs present that I am currently working on. Another containing a single bone that I think is a hadrosaur pubis. One thing that surprised me was the wealth of smaller bits of bone present in the jacket I'm sure this is an amazing microsite I would love to see first hand. There were some really small bones that I don't think are identifiable but regardless very cool. This one with a r
  4. 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
  5. SomeDino

    Is this an Acheroraptor tooth?

    I obtained this tooth on a dig back in early June close to Jordan, Montana and was immediately told it was definitely a raptor tooth and was content with that. But more recently I’ve gotten curious and done some reading to try to figure out what exactly it was. From what I’ve read and seen online, it is pretty much a token Acheroraptor tooth with the very apparent ridges and larger serrations on one side while the other has small or none, but I wanted to double check with someone more familiar with the teeth to make sure. I’ll post any pictures requested, thanks! (also, please don’t
  6. More and more dinosaur material is becoming available from the Two Medicine Formation. I see lots of misidentified material and some with questionable localities that might fit other deposits. I would like to summarize what I believe is currently known and published. If you see any omissions or errors, please let me know Not a lot of good maps out there to show the formation but here are two. The TMF is about 650 meters thick and is the western equivalent of the Judith River Formation. Most of the sediments were deposited in streams, rivers and lakes. It overlies the Virgel
  7. More and more dinosaur material is becoming available from the Judith River Formation. I see lots of misidentified material and some with questionable localities that might fit other deposits. I would like to summarize what I believe is currently known and published. If you see any omissions or errors, please let me know. Not a lot of good maps out there to show the formation but here are two. In general, the exposures are in North Central Montana. Horner describes the formation on the western end is near the east end of the Sweetgrass Hills (very thick about 152 meters) and
  8. Hi! I bought this piece a few months ago and just wanted to make sure it is what they tell me it is. Apparently it's a Triceratops horridus vertebra pedicle from the Hell Creek Formation of Dawson County, Montana.
  9. CM8

    Hell Creek limb bone?

    Hi folks, Anyone have any bright ideas on what this is and what species it might be from? 8 inch limb bone(?) fragment. According to the seller it's from the Montana portion of the Hell Creek formation. Both ends appear broken off, but I'm not sure if the bone features on the inside of the curve can help with ID at all?
  10. Hello. This is my first real post to these forums, so let me know if I do something incorrectly. I found these last year in Montana, USA. For the first one, I’m not quite sure where the fossil ends and the rock begins. I am worried about accidentally chipping away the fossil. It's 10x5.5cm. Here is the piece in question: I also found two other large pieces. The first I will call “trident” (because it has three prongs). It's 8 x 7.5cm. I am wondering where the rock begins and fossil ends on this one as well:
  11. Hi everyone! I have my eye on an interesting claw from Hell Creek in Carter County Montana on "that website" and was wondering if anyone could give some extra insight. The seller listed it as Alvarezsaurus, which I had honestly never heard of before, and a quick search revealed that genus is much older than Hell Creek and from South America. I think they might mean it's from the Alvarezsauridae family, but in any event before I try for it I figured I should ask for an outside opinion on what this is from since this group is new to me.
  12. Bear003

    Help with ID

    Hello everyone. I’m an amateur fossil hunter that goes out occasionally by our cabin in central Montana. We often find crinoid rings which are common. Found this today which made my day! I’m wondering if anyone can help ID which family or group this is from? Found in Judith Basin County in the Little Belt Mountains. Thank you!!
  13. Female, head disarticulated and displaced. The fish is embedded in a mass of filamentous algae. Alternative combination: Physonemus falcatus. "The genus Physonemus was originally erected for P. arcuatus by McCoy (1848) to receive elegant forwardly-curved, well omamented Paleozoic fin spines of unknown affìnities ... The Paleozoic fin spine Physonemus falcatus St. John and Worthen 1883, from the Valmeyeran St. Louis Limestone of St. Louis, Missouri, has been found on sexually mature males of a small, highly sexually dimorphic chondrichthyan from the Chesterian Bear Gulch Limestone of Montana"
  14. Fossil Maniac

    What type of dromaeosaur is this?

    Hello! I bought this dromaeosaur tooth and I’d like to know what genus maybe even species it is from. Thank you! (The tooth measures 0.46 inches and is from hill county Montana it is 74 million years old.
  15. Hi everyone! I recently acquired some really interesting little Theropod teeth from the Hell Creek Formation of Carter County Montana. I have my suspicions on IDs, but I would really like a second opinion. Tooth 1: My first thought with this little guy was Troodontid, but I have no experience with Troodontid teeth. It might also be a really tiny Dromaeosaur. No serrations or even a trace of serrations on the mesial side is kind of a unique feature. It doesn't look like they were there and wore off either, it looks like there were never serrations on that side.
  16. jikohr

    Are these Juvenile Rexes?

    Hi everyone! I acquired these two pretty recently and immediately though Juvenile Rex, but after that other one I figured I should be more careful and ask for a second opinion. Both are from the Hell Creek of Powder River County, Montana. Tooth 1: Crown Height: 11 mm Crown Base Length: 5.5 mm Crown Base Width: 5 mm Mesial serration density: 4.5 per mm Distal serration density: 4 per mm Tooth 2: Crown Height: 14 mm Crown Base length: 7 mm Crown Base Width: 5 mm Mesial serration density: 4.5 per mm Distal serration density:
  17. The Two Medicine Formation is a late Cretaceous geological formation that was primarily deposited in North Central Montana 84 to 71 million years ago about the same time as the Judith River Formation, See Map - pink area. The Two Medicine is found along the east flank of the Rocky Mountains and represents the upland area of the Cretaceous Seaway while the Judith River Formation represents the lowland area. Although deposited in the roughly the same period the Two Medicine has yielded an amazing list of dinosaurs that are not found in the Judith River. These include Einiosaurus procurvicornis,
  18. Hello, Heres another chunk of interesting-looking bone for which curiosity has finally gotten the best of me. This is a piece I picked up in 2021 on my summer dig at the Hell Creek Formation in Montana. I feel there’s a chance this piece might be identifiable. This piece of bone is bowl-shaped with a strange web-like texturing on the convex side. The edge of the bone which is not broken is rounded and almost flower petal like. There is a set of T-shaped rounded ridges on the concave side. Not the best quality bone either, with significant siderite encrustation being pre
  19. PaleoNoel

    Bird Vertebra from Hell Creek

    Hi everyone, I wanted to share my favorite find from the Hell Creek of eastern Montana from the last few weeks. It's overall shape and size suggest to me that it's a hesperornithid vert. The bone is a bit over 3 cm long and around 2.5 cm in height. After some comparisons to Hesperornis vertebrae online I feel that this is the best match. From "Identification of a New Hesperornithiform from the Niobrara Chalk and Implications for the Ecologic Diversity of Early Diving Birds" by Alyssa Bell and Luis Chiappe in 2015 https://journals.
  20. My youngest brother found this on his first microsite hunt. I could not believe it. I have not found many mammal teeth and am unsure as to what this belonged to. I also added some pictures of another tooth found in the area that I am having a hard time placing an ID on. Any help is appreciated! Hell Creek formation, Dawson County, MT.
  21. Hello all, looking to get some opinions. 5-6 years ago I came across a ton of fragmented bones while scouting out a new collecting site. One of the first things that really caught my eye was this, lets call it a "claw". Like I said this was among a ton of shattered bone so it kind of stood out right away. I followed the bone fragments more up a very steep hill that turns into a cliff. This led me probably 50-75 feet from the initial sighting of bone to a place that was dangerously steep, but I could see more bone weathering out of the hill. It was in very bad shape
  22. Hi, more fossils from my collection. The first two pictures are of a pyritized Ammonite from Buttenheim, Germany and is from the Jurassic. The next two are of a pyritized Ammonite from the Volga River, Russia and is Jurassic. The next picture is of Marston Marble. The second to last and the final is Beringiaphyllum cupanoides from the Fort Union Formation in Montana.
  23. dinosaur man

    Crocodilian, Turtle, or Both?

    I recently acquired a bunch of matrix from the Cloverly Formation of Carbon County, Montana. And came across a few scutes. I’m not fully sure if they are turtle, crocodile, or maybe both, which is why I thought I’d share them here.
  24. Hello everyone! My name is Weston and while I studied Geology at Whitman College, I never continued by degree. I am now getting a nursing degree and was stationed in Jordan, Montana for rural clinical. A contact of mine let me dig on land and I found all these fossils. Here is a link to my google drive photos. Please help me ID everything and anything you can. I am wondering if the things that look like eggs are actually eggs, as well as what the perfect sphere is. I am also wondering what dinosaur the bones most likely belonged to. I am confident there are coprolites right? I am
  25. Hi everyone! Here's another little tooth that has me stumped. It has a pinch like a Nano, but the serration density is what I've come to expect from a raptor. At least I got some really nice shots of the serrations! CH: 8 mm CBL: 5.5 mm CBW: 2 mm mesial serration density: 6/mm distal serration density: 4.25/mm So what do you all think? Nano? Dakotaraptor? Tyrannosaur/Dromaeosaur indet.? Any insight is appreciated as always!
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