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  1. Grad student finds a new saber-toothed species, in a museum, University of Oregon, Department of Earth sciences Abstract The open access paper is: Barrett, P.Z., 2021. The largest hoplophonine and a complex new hypothesis of nimravid evolution. Scientific reports, 11(1), pp.1-9. Yours, Paul H.
  2. fossilhunter21

    Some White River Formation Fossils For ID

    Hello everyone! Earlier this year, in August, I went fossil hunting in the White River Formation. This jaw was one of the first specimens I found. Unfortunately when I found it, it was actually in better shape... When I found it it had obviously been out in the weather for quite some time, and so it was kind of fragile. I was not thinking, and just took it out of the ground, hoping I could put most of the pieces together later. I know it was a dumb decision, and I won't do it again (hopefully...). Along the way, I lost some parts, and so now it is not near as complete as it was.
  3. From the album: Fossilhunter21's collection

    Genus: Merycoidon Location: Our Heritage Guest Ranch, Crawford, NE Date of Discovery: 8/12/22 Image of Meryocoidodon culbertsoni Skeleton:
  4. From the album: Fossilhunter21's collection

    Genus: Archaeotherium Location: Our Heritage Guest Ranch, Crawford, NE Date of Discovery: 8/9/22 Image of Archaeotherium mortoni Skull:
  5. From the album: Fossilhunter21's collection

    Genus: Archaeotherium Location: Our Heritage Guest Ranch, Crawford, NE Date of Discovery: 8/9/22 Image of Archaeotherium mortoni Skull:
  6. Hey all. I had these pictures sent to me by a friend, and we're both totally stumped over what this possibly could be. It was found pretty densely surrounded by other shattered bone. Any help at all would be greatly appreciated- we've really been scratching our heads over this one!
  7. fossilhunter21

    Helix Leidyi

    From the album: Fossilhunter21's collection

    Species: Helix Leidyi Location Crawford, NE Date of discovery: 8/9/22
  8. fossilhunter21

    Helix Leidyi

    From the album: Fossilhunter21's collection

    Species: Helix Leidyi Location Crawford, NE Date of discovery: 8/9/22
  9. fossilhunter21

    Oreodont skull #2

    From the album: Fossilhunter21's collection

    Species: Merycoidodon sp. Location: Crawford, NE Date of discovery: 8/12/22
  10. fossilhunter21

    Oreodont skull #2

    From the album: Fossilhunter21's collection

    Species: Merycoidodon sp. Location: Crawford, NE Date of discovery: 8/12/22
  11. fossilhunter21

    Oreodont skull #2

    From the album: Fossilhunter21's collection

    Species: Merycoidodon sp. Location: Crawford, NE Date of discovery: 8/12/22
  12. fossilhunter21

    Fossil hunting trip!

    Me and my family just finished up our first fossil hunt! We are still at the ranch, but are leaving in the morning. We all are sad to have to leave the ranch. We all had fun exploring and doing different thimgs, (though some of us a lot less than others) and really enjoyed talking with, Rick and, Jean. They are really nice people. And it is a really nice place to stay. Unfortunately the guide, and everyone else cancled, so we were fossil hunting alone. WE left home at 2 AM on saturday, and arrived in Omaha, NE around 11 AM. We stopped in Omaha to visit with some fa
  13. The first (and only- for now) Oreodont skull I prepped was in remarkably good condition and required virtually no reconstruction, just a thorough and careful cleaning + a little stabilizing. Afterwards I was looking for a good way to display this little skull in a manner where it wouldn't just be sitting on a flat surface. I'm not great at bending metal to create an elevated cradle so I came up with this: I laid a sheet of plastic wrap on the underside of the skull and gently pressed Apoxie sculpt on top of the plastic so it molded to the contours of the skull. I then pressed a met
  14. I came across this jaw fragment from a spot in the White River Formation, Central WY. I'm going crazy trying to ID this thing- any suggestions?
  15. Found these teeth while hiking at Pawnee Buttes last year and am unsure what they belong too. My top guess would be Oreodont though.
  16. Max fragmento

    Hyaenodon ?

    Hello I found this in the White River Formation in Wyoming. Is this a Hyaenodon ? The block of rock seemed much harder than usual and had no cracks in it. It was more difficult to prep out than other similar fossils (oredonts, archeotherim, Probotherium) that I have found in the same area. I think maybe the harder un-cracked matrix contributed to the nicer quality of the fossil. Lots of amateur prepping mistakes but the matrix was soooo resistant to removal. Just wouldnt pop off nice like it does sometimes and I dont own a respectable sand blaster machine.
  17. Hey everyone! Me and my family are thinking about taking a trip to the White River Formation. But we were wondering what some good places are to go fossil hunting? Thank you, -Micah
  18. MarcoSr

    Petrified Flame Sponge?

    Have you ever heard of Petrified Flame Sponge from Wyoming? I just bought (in the mail) the below piece because I want to look at it under a microscope and I think I can take some interesting pictures of it. It is supposed to be from the White River Formation in Wyoming. See the below cards with it. Marine from the White River Formation doesn’t make sense to me. Fluvial would, but not for sponges. Tsunami in Wyoming also doesn’t make sense. Reworked from older Formation? Ideas on what this is? Just a name for a type of agate? Petrified Flame Sponge Slab, Late Eocene/Early
  19. Opabinia Blues

    White River Formation Carnivore Canine

    Hello! This is a canine tooth (that has been split in half) that I collected from the White River Formation (I believe Poleslide Member of the Brule) from Weld County, CO. I think it is a carnivore’s canine rather than simply an Oreodont canine just due to its size, but I could be wrong there I suppose. My best guess is Daphoeneus or similar due to its shape, it does not look like Hyaenodon to me, but again, could be totally off there. Pictured is the tooth’s lateral surface, interior (because it was split when I found it) and the “cutting surface.” Thanks!
  20. Hey everyone! So I have been having trouble finding more unprepared White River Formation fossils that I could buy. So I thought I might ask my freinds on TFF if they know where I could get some. Thanks! Ps. Please PM me with any information.
  21. fossilhunter21

    Oreodont prep!

    I recieved this skull yesterday and have been working on it whenever I have time. The skull is not super complete, but I still like it. Here are the images from the seller:
  22. Fossilis Willis

    good times in the badlands

    Earlier this month @JD3B and I went a incredible fossil hunting road trip. The title may be a bit misleading, as only one day was actually spent in the badlands. There were however, plenty of good times. We were lucky to have the opportunity to visit a few storied formations, and even luckier to have a couple tff legends to guide us. The first morning was an early one with a 3:00 am wake up. I was at Jacob's (JD3B) by 4:00 and on the road before 5:00. First stop, the Helena, Montana area to visit the world renowned @RJB museum of natural history. We arrived late in the afternoon an
  23. I just got back from an amazing and very fruitful week of fossil collecting on the White River Formation in northeastern Colorado. The White River Formation is a very easy and fun rock unit to collect vertebrate fossils on. The White River Formation was deposited during the very latest Eocene and the early Oligocene, though the faunal diversity in the areas I was collecting on suggest it was laid down during the Orellan North American Land Mammal Age, which centers on around 33 million years ago during the Rupelian age of the Oligocene Epoch. I am very lucky to have a grand uncle
  24. I found this front bit of carnivore jaw while out on my latest fossil collecting trip in the White River Formation of Colorado. Only one tooth is complete, the canine tooth has broken off. It’s too large to be Hesperocyon and the cross section of the canine tooth does not match that of Daphoenus, which I have previously collected material, including a canine tooth, from. That leaves Hyaenodon and the Nimravids. After doing some comparative research with pictures of skulls, I am tentatively leaning towards this being from a Nimravid, as the contours of the jaw line near the socket
  25. I have a few really nice fossils from the White River Formation of northeastern Colorado that I need to prep, and given I am a beginner at fossil prep I would really like to gain some advice and guidance from people with experience do I don’t accidentally damage the fossils. The first fossil is an Oreodont skull. The skull is mostly intact, and I was able to extract it from the field without using any glue or stabilizer or consolidant or anything like that, so this fossil is in its “natural state.” The zygomatic arch and upper tooth row are crumbling, but
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