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  1. oilshale

    Atractosteus simplex (Leidy, 1873)

    Atractosteus simplex and A. atrox occur mainly in Fossil Lake deposits where they are relatively rare (less than 0.05% of the fish fauna). The long snouted gars are much rarer in Lake Gosiute and Lake Uinta deposits. Taxonomy from Fossilworks.org. Emended species diagnosis from Grande 2010, p. 471: “†Atractosteus simplex differs from other species in the genus by the following characters A-E. (A) Having a lower number of lateral line scales than any other species except for †A. messelensis sp. nov. (Table 184). (B) Having a lower number of abdominal vertebrae than any other species except
  2. thelivingdead531

    TFF member trip to Kemmerer 2022?

    Hey everyone! Would anyone be interested in doing a group trip to Kemmerer, WY next summer? Since we moved to Wyoming 2 years ago I’ve been dying to go to a quarry out there for some fish but circumstances have prevented that. My family has no interest at all and, because of anxiety, I don’t want to go alone. Plus, I think it would be a fun experience for forum members to be able to get together and have a good time. I only have 2 summers left here and next summer would probably be the easiest one for me. Someone please say yes!
  3. gond

    Knightia eocaena

    Complete specimen of Knightia eocaena. Reference: Lance Grande 1984. "The paleontology of the Green River Formation, with a review of the fish fauna". Wyoming Geological Survey, Bull. 63, pp. 85-86-87 for description of the species, pp 93-95-96-100 for images.
  4. 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
  5. Praefectus

    REMPC-AC0003 Phareodus testis

    From the album: Prae's Collection (REMPC)

    Phareodus testis Eocene Green River Formation Kemmerer, Wyoming, USA
  6. Day 5 in South Dakota was a total bust for my son and me. The section of the quarry we worked has large ironstone and clay boulders, but also has large bones. We sat next to a jacketed femur and worked back the wall face. We didnt find more than a few small bits at the end of the day, but I said that something big was there. Big rocks = big bones. Sure enough, Walter sat down in our spot 3 days later and immediately uncovered a ceratopsian dentary! By this point were were already on to our next destination in Kemmerer, Wyoming. 3 days of splitting shale for fish, hoping for th
  7. Hello! I've been to the main digging site in the Blue Forest of Wyoming a couple of times but would like to try a couple of other sites there. Does anyone have the directions to the other digging areas? Thank you!
  8. oilshale

    Masillosteus janeae Grande, 2010

    From the album: Vertebrates

    Masillosteus janeae Grande, 2010 Eocene Lutetium Kemmerer Wyoming USA Length 17" / 42cm And this is the other of the two short snouted gars from the Green River Formation: Cuneatus (Lepisosteus) cuneatus Cope, 1878 Lit.: Grande, L. (2010): AN EMPIRICAL SYNTHETIC PATTERN STUDY OF GARS (LEPISOSTEIFORMES) AND CLOSELY RELATED SPECIES, BASED MOSTLY ON SKELETAL ANATOMY. THE RESURRECTION OF HOLOSTEI. Copeia, 2010, No 2A, 1-863
  9. oilshale

    Atracosteus simplex (Leidy, 1873)

    From the album: Vertebrates

    Atracosteus simplex (Leidy, 1873) former name: Lepisosteus simplex Middle Eocene Green River Formation Kemmerer Wyoming USA Length 40 cm
  10. oilshale

    Asineops squamifrons COPE, 1870

    Asineops (Greek for "donkey-faced") squamifrons was first described by Cope as having an affinity to the pirat perch family. Later, with more detailed study, this species was found to lack the diagnostic characters of that family. Thus it is not yet clearly assignable to order. Although this species is much rarer in the Fossil Lake sediments than in Lake Gosiute deposits, the specimens from Fossil Lake are much larger than those from Lake Gosiute. Line drawing from Grande 1984: Identified by oilshale using Grande 1984. References: Edward D. Cope (1870): Observations o
  11. Winter Hobby


    My latest completion. I like this one but still prefer the Mioplosus. I'm looking for a Priscacara next. Maybe Santa will bring me a fossil for Christmas!
  12. My wife and I went on a 7500+ mile ramble to break out of our COVID doldrums. Due to the virus we had to change up many of our original plans... which conversely added a number of additional fossil hunting locals as they allowed us to mostly avoid our fellow humans and maintain social distancing by many many miles. As part of our trip preparations my wife sewed us a number of masks, including a whole series of fossil hunting masks for me. Originally we were supposed to stay in Chicago, but we elected to avoid staying in the city, so we only got to do a drive by
  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. I still have about 30 more to finish preparing, but so far, here are the best two I have prepped from my 2019 Green River run:
  15. BentonlWalters

    Belated 2019 Road Trip Fossils

    Last year, to celebrate finishing my undergraduate degree, my girlfriend and I went on a long (9,000+ mile) road trip around the western US and at long last (a little over a year since their discovery) the last of the fossils we found are out of the refrigerator and I’ve finally gotten all of them photographed. Here are some of the highlights and best fossils we found. A rough map of the route of the trip While the trip wasn’t entirely fossil centric we wanted to hunt at a few cool spots along the way. We chose to visit 5 fossil locations, the first of which was
  16. jnicholes

    Coprolite fossil ID

    Found this “piece of snarge” fossil on a fossil trip in Kemmerer Wyoming.. Piece of snarge? Coprolite? It’s a pun, get it? Seriously though, they think it’s either crocodilian or turtle in origin. What do you guys think? Anyway to tell? it’s pretty cool. I’ve got lots of other fossils to share later.
  17. minnbuckeye

    Green River Fish ID

    Here is a large partial fish I found a few weeks ago. Not sure, but suspecting maybe Phareodus?? Any thoughts? Thanks, Mike
  18. oilshale

    Heliobatis radians MARSH, 1877

    From the album: Vertebrates

    Heliobatis radians MARSH, 1877 Eocene Ypresian Green River Formation Kemmerer Warfield Quarry Wyoming USA Length 45cm / 18"
  19. jnicholes

    The Heck?

    So, was looking at my fossils, and I saw something that has me puzzled on one of them. Pictures are attached. Underneath the jaw of the fish there are what look like ribs to some other fish. I want a second opinion on this though. Thats not what has me puzzled, though. Whats puzzling me is next to the fossil, the x shaped thing in the picture. Any idea what these are in the pictures? I think the fish is a Phareodus, By the way. Jared
  20. jnicholes

    2 IDs

    A little back story. I went to Kemmerer, WY for a fossil hunting trip on August 12, 2019. The attached photo is a Phareodus I found. Today, I noticed something that looks like petrified wood near the lower jaw and on the Phareodus near the bottom. I said to myself, "It retained its shape, so it may be petrified wood." After a little digging, I discovered something else that was segmented and flat. Did not look like a spinal chord to me. Here are the two IDs. What is the segmented thing? What is the part next to it, Petrified Wood? Any help will
  21. Fossil-Hound

    Muddy Wyoming Fish

    FYI @Ptychodus04 @Kittenmittens @mamlambo @Fossilis Willis @Malcolmt @DevonianDigger Well managed to get out last Friday to dig up some Green River fish from the split fish layers. These layers aren't nice and hard like the 18 inch, nor are the rarer fish as obtainable (they don't preserve as well), but you can still find some pretty cool stuff. A family next to me found a foot long Phareodus in perfect condition with a dark red color (forgot to take a picture of that). I don't think they realize just how lucky they are because those are not easy to find. The night before it rained a ton
  22. oilshale

    Amphiplaga brachyptera COPE, 1877

    Amphiplaga is one of the rarer of the Green River fish fossils, making up some 1% of the total from Fossil Lake, its only known location. Amphiplaga belongs together with its close relative Erismatopterus to the family Percopsidae within the order Percopsiformes. Amphiplaga is best distinguished from Erismatopterus by its dorsal fin, which has three hard spines (the first one is very small) followed by 9 or 10 soft rays. Erismatopterus usually has two hard spines followed by 6 or 7 soft spines. Amphiplaga can reach up to 15cm with an average length of about 10cm while Erismatopt
  23. oilshale

    Amphiplaga brachyptera COPE, 1877

    From the album: Vertebrates

    Amphiplaga brachyptera COPE, 1877 Middle Eocene Kemmerer Wyoming USA Length 8cm
  24. oilshale

    Atractosteus simplex (Leidy, 1873)

    From the album: Vertebrates

    Atracosteus simplex (Leidy, 1873) former name: Lepisosteus simplex Middle Eocene Green River Formation Kemmerer Wyoming USA Length 29"/ 73cm
  25. From the album: Vertebrates

    Asterotrygon maloneyi Carvalho, Maisey & Grande 2004 Middle Eocene Kemmerer Wyoming USA
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