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Found 22 results

  1. This is a re-post of a topic I started late this last summer, but got lost during the August forum migration. Late in July I took a trip with a few friends out to the American Fossil Quarry and Fossil Butte National Monument to hunt for fossils out of the lower Eocene Green River Formation. The Green River Formation is a lagerstatte which is perhaps the best site in the world for articulated fossil fish, many of which also display varying degrees of soft tissue preservation. Fossils from this locality are mined commercially and are ubiquitous on the fossil market. Living in Denver, the Green River Formation is only a few hours away by car and I've always wanted to plan a trip out there to collect it, which is very easy to do and fairly cost-effective thanks to numerous pay-to-dig quarries where you get to keep essentially everything you find. I decided to plan a dig at American Fossil Quarry, which is one of the more popular quarries. I managed to convince two of my friends to come with me, and we spent a day and a half (12 hours total) at the quarry while camping at the nearby Lake Viva Naughton. It was my two friends' first times ever hunting for fossils, and they both report that their expectations were far exceeded at the quarry! There's a very good chance this trip was the start of the making of two new fossil fanatics. We had a blast out in the quarry, with the thrill of discovery doing plenty to stave off the oppressive sun and desiccating dust. We also made sure to visit some of the fossil shops located in Kemmerer and spent some time at the museum in the visitor's center of Fossil Butte National Monument, which is fantastically well put together and was so awesome to see. Each of us found plenty of treasures, including lots of Knightia and Diplomystus fish as well as coprolites (fish, stingray, and turtle), scales, occasional plant material, and even a few rarer fish. Here's some pictures from our adventure: Myself posing with a very nicely preserved Knightia eocena. My two friends hard at work splitting shale for ancient treasures. A few of my day one finds on my shelf. A very nice partial Priscacara found by one of my friends. A small stingray with associated Knightia found by a different participant the first day we were there. A mostly complete Amphiplaga brachyptera (one of the rarer fish) found by me, associated with a Knighta alta. Only the tail and part of the dorsal fin is missing, the rest of the fish is intact! Easily my prettiest fish: An absolutely perfect Diplomystus dentatus found by me the second day. One of the displays at the visitor's center of Fossil Butte National Monument. Cheers, and thanks for reading!
  2. I was wondering if anyone ever made the claim to have the smallest articulated fossil, because I think I've got a decent shot! These are the smallest fish I've found so far. There are two Mioplosus labracoides and one Priscacara sp.
  3. Picked this up a while ago. Finally prepping. Slow going as it's in some very hard sediment. Saw some teeth pop out today.
  4. It’s been a few years since I’ve posted, good to be back- I’m looking for unprepped material! I’m just a hobbiest who enjoys the prep work as much or more than the collecting. I’m not an expert by any means but I’ve done a handful of large green river fish, a few mammoth tusks, an Oreodont upper skull, and a few other miscellaneous specimens. One of the most enjoyable prep projects I did was a small oreodont upper skull that was in grade A condition, but since then (years ago) I cannot seem to find anything similar. I am most interested in any unprepped white River specimens, ideally skulls, turtle shells, etc. as long as they’re in grade A or B condition- I’m not an expert at reconstruction. I’m also interested in some of the larger and more rare species from the Green River formation. A large and complete Mioplosus preferably from the 18in layer would be great, I’ve only ever done one of those before and it was sadly around 30% disarticulated. Any help would be greatly appreciated, thank you! nick
  5. hadrosauridae

    Prepping a Green River Mioplosus

    Welcome to another Fossil Friday! My video today is my first time prepping a fish from the Green River formation, 18-inch layer. This fossil was from recovered from outside of Kemmerer, WY by a friend, @Ptychodus04
  6. Ludwigia

    Mioplosus labracoides (Cope 1877)

    From the album: Pisces

    37cm. long. Eocene (Ypresian/Lutetian). Green River Formation. 18" layer. Found at Stone Fossils Quarry, Lincoln County, Wyoming. Acquired from Kris (Ptychodus04).
  7. PaleoPat

    Fish Identification

    Hi everyone, I got this fish at a mineral shop and he had no identification for it. My son thought it might be a knightia or a mioplosus. It also looks to me like it got fossilized when going to the bathroom. Can anyone help me ID it? Am I right about the poop? I'd really appreciate it. Pat
  8. Fossildude19

    Mioplosus labracoides

    From the album: Fossildude's Purchased/Gift Fossils

    Mioplosus labracoides from the Green River Formation. No provenance on location, unfortunately. Inexpensive auction find.

    © 2021 Tim Jones

  9. Winter Hobby

    Completed Mioplosus

    Special thanks to Ptychodus04 for his help completing this beauty.
  10. Roby

    Mioplosus labracoides

    This Mio was pulled from the wall while collecting with a friend where all finds were split between the two of us. In November I prepped it. Added others from American Fossil in 2017 and 2018. Lit.: John A. Whitlock, 2010. Phylogenetic relationships of the Eocene percomorph fishes Priscacara and Mioplosus. Journal of Vertebrate Paleontology 30(4):1037–1048, July 2010 by the Society of Vertebrate Paleontology. Lance Grande, 2013. The Lost World of Fossil Lake: Snapshots from Deep Time. Edition: 1 Publisher: University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
  11. Winter Hobby

    Removing hard matrix

    I dug this up in Wyoming and was told it's a Mioplosus. The soft sandstone came off with only a bit of effort. Now I'm on to a harder crystalized matrix around the most delicate areas. I don't want to lose any of the carbon so I'm asking for help. I've used dental tools and pen razors so far. I see amazing, beautifully completed fossils on this site with no sandstone on them at all. Is there a method or tool I am unaware of?
  12. Mioplosus_Lover24

    Show Us Your Favorite Fishy!

    Well, we've had Brachiopods and Trilobites, so I figured let's give fish a try! I am going to start this off with my Enchodus marchesettii from the Hakel Quarry of Lebanon. Not only is this fossil 100% complete with the only restoration done was repairing the matrix itself, but I received this from one of my good friends on none other than my birthday! This is my favorite fossil in my ENTIRE collection! More will come from the Greenriver side of my collection, I just gotta get my camera fixed
  13. jnicholes

    Mioplosus labracoides?

    I’m pretty sure this is a Mioplosus labracoides, but I would like some confirmation before I label and frame it. Found in Wyoming, green river formation.
  14. Mioplosus_Lover24

    My 2nd Trip To American Fossil!

    Hello all! This summer I took my yearly trip to Wyoming, and with my luck I again came back with several extremely incredible fossils! I found many less fish this time around, but I did find several more rare ones! I probably only found around 50 fish in the 3 days I was there. I found 8 Phareodus, including 2 juveniles! I found only 1 Mioplosus this year, the fish seems to be avoiding me sadly... I found 3 Priscacara, including a very large Priscacara serrata! I found an interesting Hypsiprisca preserved beautifully on an algea layer, also found several more Amia scales, but one of my favorite finds was a giant Amia tooth! (Though I suspect it to be gar) they said it was the largest one they had ever seen, and it is an excellent place holder for a future complete Amia! I also found dozens of shells! The shells especially the snail shells are considered to be one of the rarest components of the fauna, so it was very odd finding over a dozen! Including 4 mass mortality plates which each have dozens of shells on them! I also ended up finding an incrediblely incrediblely rare piece of bamboo, they told me that bamboo is rarer than a dozen stingrays! Speaking of stingrays, I FOUND MY FIRST ONE! A large Heliobatis that I split out almost perfectly! Speaking of rare finds, my absolute favorite find of this trip came as a surprise! Early in the day I found a very strange algea layer with several gastropod beaks, and I was excited as I thought I had found a Crossopholis. After having my heart broken I sulked over to a new pile of rocks and one my first split I found something very strange, a plate of small serrated scales! I did it! I found myself a paddlefish it's disarcticulated, but it still has a fin beautifully preserved! It's hard to describe the feeling of finding a Paddlefish and a Stingray the same day! I will be posting pictures soon! I will also be submitting my stingray whenever the prep work is finished!
  15. Mioplosus_Lover24

    Fish Aspirations!

    One of the rarest and most unique fossils are aspiration pieces! I have been very lucky in acquiring 2 over the course of collecting, neither are incredibly good, but their rarity alone makes them that much more desirable! I would love to see anyone else's fish with eyes bigger than their stomachs!
  16. Hello, I was looking at one of my fossils, a Mioplosus I found in Wyoming to be exact, and I noticed some weird bumps in the rock under the jaw. I was like, "Is that a spine? It cant be." Now, the mouth of the Mioplosus was mangled, so you cant make out the jawline. After seeing what looked like a spinal chord under the mouth, I had a theory, "What if the mangled mouth is actually another fish the Mioplosus was eating when it died?" After gently scraping away some of the rock around the bumps I thought were a spinal chord, I confirmed my theory to be correct. There was another fish in the fossil. This Mioplosus was eating another fish, a Diplomystus, to be exact. What do you guys think? Two fish in one? Pictures are attached. Jared
  17. A few weeks ago, I posted asking for advice on splitting fish for Green River. Your advice helped me out A TON, so thank you for that . I ended up leaving with a shrimp, crawdad, 3 Pharo's, 8 Amphiplagas, both species of Hypsiprisca, and many more. But by sheer luck, we ended up finding a bird, which means, we're going back to Wyoming for a CT scan.(And for more splitting) According to Arvid, the bird appears to be a new species, slightly dis-articulated, but it still has it's skull. I'll post pictures of our finds when I get a chance, but I wanted to thank everyone that gave me advice.
  18. I have been on the market for a large Mioplosus for about 3 years. The largest in my collection now is a humble 11". I was wondering if anybody knew someone that was selling or trading for a larger Mioplosus.(Preferably over 15")
  19. Bone guy

    Mioplosus labracoides

    From the album: Green River Formation

    This is a 6 inch long specimen of Mioplosus labracoides, an uncommon fish from the green river formation. The fossils of these fish are highly sought after by collectors because of their slight rarity, preservation, and yes....teeth. Many specimens of Mioplosus like this one exhibit a mouth full of small needlelike teeth. These fish would have lived a solitary life of being a voracious predator. Some specimens of Mioplosus are found with a fish still in their mouth, proof of their insatiable appetite and gluttony.
  20. From the album: Vertebrates

    Mioplosus labracoides Cope, 1877 Middle Eocene Ypresian Green River Formation Kemmerer Wyoming USA Length: 3.5cm
  21. sseth

    Mioplosus labracoides

    The Mioplosus is an extinct genus of Percid fish that lived from the early to middle Eocene. These fish were predators in Fossil Lake's large ecosystem.
  22. oilshale

    Mioplosus labracoides COPE, 1877

    References: John A. Whitlock (2010) Phylogenetic relationships of the Eocene percomorph fishes Priscacara and Mioplosus. Journal of Vertebrate Paleontology 30(4):1037–1048. Lance Grande (2013) The Lost World of Fossil Lake: Snapshots from Deep Time. Edition: 1 Publisher: University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
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