Jump to content

Search the Community

Showing results for tags 'kemmerer'.

  • Search By Tags

    Type tags separated by commas.
    Tags should be keywords or key phrases. e.g. otodus, megalodon, shark tooth, miocene, bone valley formation, usa, florida.
  • Search By Author

Content Type


Forums

  • Community News
    • Member Introductions
    • Member of the Month
    • Members' News & Diversions
  • Fossil Discussion
    • General Fossil Discussion
    • Questions & Answers
    • Fossil Hunting Trips
    • Fossil ID
    • Partners in Paleontology - Member Contributions to Science
    • Fossil of the Month
    • Member Collections
    • A Trip to the Museum
    • Paleo Re-creations
    • Collecting Gear
    • Fossil Preparation
    • Is It Real? How to Recognize Fossil Fabrications
    • Member-to-Member Fossil Trades
    • Fossil News
  • General Category
    • Rocks & Minerals
    • Geology

Categories

  • Annelids
  • Arthropods
    • Crustaceans
    • Insects
    • Trilobites
    • Other Arthropods
  • Brachiopods
  • Cnidarians (Corals, Jellyfish, Conulariids )
    • Corals
    • Jellyfish, Conulariids, etc.
  • Echinoderms
    • Crinoids & Blastoids
    • Echinoids
    • Other Echinoderms
    • Starfish and Brittlestars
  • Forams
  • Graptolites
  • Molluscs
    • Bivalves
    • Cephalopods (Ammonites, Belemnites, Nautiloids)
    • Gastropods
    • Other Molluscs
  • Sponges
  • Bryozoans
  • Other Invertebrates
  • Ichnofossils
  • Plants
  • Chordata
    • Amphibians & Reptiles
    • Birds
    • Dinosaurs
    • Fishes
    • Mammals
    • Sharks & Rays
    • Other Chordates
  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

Blogs

  • Anson's Blog
  • Mudding Around
  • Nicholas' Blog
  • dinosaur50's Blog
  • Traviscounty's Blog
  • Seldom's Blog
  • tracer's tidbits
  • Sacredsin's Blog
  • fossilfacetheprospector's Blog
  • jax world
  • echinoman's Blog
  • Ammonoidea
  • Traviscounty's Blog
  • brsr0131's Blog
  • brsr0131's Blog
  • Adventures with a Paddle
  • Caveat emptor
  • -------
  • Fig Rocks' Blog
  • placoderms
  • mosasaurs
  • ozzyrules244's Blog
  • Terry Dactyll's Blog
  • Sir Knightia's Blog
  • MaHa's Blog
  • shakinchevy2008's Blog
  • Stratio's Blog
  • ROOKMANDON's Blog
  • Phoenixflood's Blog
  • Brett Breakin' Rocks' Blog
  • Seattleguy's Blog
  • jkfoam's Blog
  • Erwan's Blog
  • Erwan's Blog
  • marksfossils' Blog
  • ibanda89's Blog
  • Liberty's Blog
  • Liberty's Blog
  • Lindsey's Blog
  • Back of Beyond
  • Ameenah's Blog
  • St. Johns River Shark Teeth/Florida
  • gordon's Blog
  • West4me's Blog
  • West4me's Blog
  • Pennsylvania Perspectives
  • michigantim's Blog
  • michigantim's Blog
  • lauraharp's Blog
  • lauraharp's Blog
  • micropterus101's Blog
  • micropterus101's Blog
  • GPeach129's Blog
  • Olenellus' Blog
  • nicciann's Blog
  • nicciann's Blog
  • Deep-Thinker's Blog
  • Deep-Thinker's Blog
  • bear-dog's Blog
  • javidal's Blog
  • Digging America
  • John Sun's Blog
  • John Sun's Blog
  • Ravsiden's Blog
  • Jurassic park
  • The Hunt for Fossils
  • The Fury's Grand Blog
  • julie's ??
  • Hunt'n 'odonts!
  • falcondob's Blog
  • Monkeyfuss' Blog
  • cyndy's Blog
  • pattyf's Blog
  • pattyf's Blog
  • chrisf's Blog
  • chrisf's Blog
  • nola's Blog
  • mercyrcfans88's Blog
  • Emily's PRI Adventure
  • trilobite guy's Blog
  • barnes' Blog
  • xenacanthus' Blog
  • myfossiltrips.blogspot.com
  • HeritageFossils' Blog
  • Fossilefinder's Blog
  • Fossilefinder's Blog
  • maybe a nest fossil?
  • farfarawy's Blog
  • Microfossil Mania!
  • blogs_blog_99
  • Southern Comfort
  • Emily's MotE Adventure
  • Eli's Blog
  • andreas' Blog
  • Recent Collecting Trips
  • retired blog
  • andreas' Blog test
  • fossilman7's Blog
  • Piranha Blog
  • xonenine's blog
  • xonenine's Blog
  • Fossil collecting and SAFETY
  • Detrius
  • pangeaman's Blog
  • pangeaman's Blog
  • pangeaman's Blog
  • Jocky's Blog
  • Jocky's Blog
  • Kehbe's Kwips
  • RomanK's Blog
  • Prehistoric Planet Trilogy
  • mikeymig's Blog
  • Western NY Explorer's Blog
  • Regg Cato's Blog
  • VisionXray23's Blog
  • Carcharodontosaurus' Blog
  • What is the largest dragonfly fossil? What are the top contenders?
  • Test Blog
  • jsnrice's blog
  • Lise MacFadden's Poetry Blog
  • BluffCountryFossils Adventure Blog
  • meadow's Blog
  • Makeing The Unlikley Happen
  • KansasFossilHunter's Blog
  • DarrenElliot's Blog
  • Hihimanu Hale
  • jesus' Blog
  • A Mesozoic Mosaic
  • Dinosaur comic
  • Zookeeperfossils
  • Cameronballislife31's Blog
  • My Blog
  • TomKoss' Blog
  • A guide to calcanea and astragali
  • Group Blog Test
  • Paleo Rantings of a Blockhead
  • Dead Dino is Art
  • The Amber Blog
  • Stocksdale's Blog
  • PaleoWilliam's Blog
  • TyrannosaurusRex's Facts
  • The Community Post
  • The Paleo-Tourist
  • Lyndon D Agate Johnson's Blog
  • BRobinson7's Blog
  • Eastern NC Trip Reports
  • Toofuntahh's Blog
  • Pterodactyl's Blog
  • A Beginner's Foray into Fossiling
  • Micropaleontology blog
  • Pondering on Dinosaurs
  • Fossil Preparation Blog
  • On Dinosaurs and Media
  • cheney416's fossil story
  • jpc
  • A Novice Geologist
  • Red-Headed Red-Neck Rock-Hound w/ My Trusty HellHound Cerberus
  • Red Headed
  • Paleo-Profiles
  • Walt's Blog
  • Between A Rock And A Hard Place
  • Rudist digging at "Point 25", St. Bartholomä, Styria, Austria (Campanian, Gosau-group)
  • Prognathodon saturator 101
  • Books I have enjoyed
  • Ladonia Texas Fossil Park
  • Trip Reports
  • Glendive Montana dinosaur bone Hell’s Creek
  • Test
  • Stratigraphic Succession of Chesapecten

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

  1. oilshale

    Masillosteus janeae Grande, 2010

    From the album: Vertebrates

    Masillosteus janeae Grande, 2010 Eocene Lutetium Kemmerer Wyoming USA Length 17" / 42cm References: 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
  2. oilshale

    Hypsiprisca sp.

    Juvenile Priscacara can be easily distinguished from juvenile Hypsacantha by their distinctly rounder body shape. Grande distinguishes two forms of Hypsiprisca: Hypsiprisca hypsacantha (originally described by Cope in 1886 under the name Priscacara hypsacantha) and a second yet undescribed, closely related form Hypsiprisca sp. H. sp. is more common than H. hypsacantha: H. sp. are mostly very small individuals less than 60mm long. Quotation L. Grande (2013): "The second species that remains undescribed differs from H. hypsacantha in being more slender-bodied and having a more convex posterior tail fin margin (H. hypsacantha has a very slightly forked tail margin)." References: Whitlock, J. (2010). Phylogenetic relationships of the Eocene percomorph fishes †Priscacara and †Mioplosus Journal of Vertebrate Paleontology Volume 30 – Issue 4, pages 1037-1048. Grande, L. T. (2013). The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
  3. oilshale

    Priscarara serrata Cope, 1877 juvenile

    A juvenile Prisacara serrata (the length is about 2.5 cm), but already showing the typical roundish body proportions of an adult Priscacara and differing from Hypsiprisca sp. Distinguishing characters for Priscacara serrata and Cockerellites liops (old name Priscacara liops): References: Cope. E. D. (1877). A contribution to the knowledge of the ichthyological fauna of the Green River shales. Bulletin of the United States Geological and Geographical Survey 3(4):807-819 WHITLOCK, J. A. (2010). PHYLOGENETIC RELATIONSHIPS OF THE EOCENE PERCOMORPH FISHES †PRISCACARA AND †MIOPLOSUS. Journal of Vertebrate Paleontology, 30(4), 1037–1048. http://www.jstor.org/stable/40864383. Grande, L. T (2013) The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.
  4. Fossil-Hound

    Kemmerer Wyoming

    American Fossil Quarry on Saturday was fun. Found my first stingray. Super happy. Another patron found another ray fairly close to me an hour later. Very rare to find two in one day.
  5. 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 for †A. messelensis sp. nov. (Table 182). (C) Differs from †A. messelensis sp. nov. in having a shorter premaxilla relative to head length (Table 180). (D) Differs from †A. messelensis sp. nov. in having a shorter head relative to standard length (Table 180). (E) differs from A. spatula and A. tristoechus in that the dermosphenotic forms part of the orbital margin as in A. tropicus." Line drawing from Grande 2010, p. 475 : Identified by oilshale. References: Grande, L. (2001) An Updated Review of the Fish Faunas From the Green River Formation, the World’s Most Productive Freshwater Lagerstätten. Eocene Biodiversity, 1–38. doi:10.1007/978-1-4615-1271-4_1 . Grande, L., Kammerer, Ch. & Westneat, M. (2006) Comparative and Developmental Functional Morphology of the Jaws of Living and Fossil Gars. // Journal of Morphology, Vol 267, Issue 9, 1017-1031. 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.
  6. 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!
  7. 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.
  8. 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
  9. Praefectus

    REMPC-AC0003 Phareodus testis

    From the album: Prae's Collection (REMPC)

    Phareodus testis Eocene Green River Formation Kemmerer, Wyoming, USA
  10. 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 that elusive stingray! Like last year, day one was kind of slow. We were also much more picky in what we packed in the truck. No more partial fish this time, I wasnt going to fill my back set area with slabs unless they were quality. Day 2 produced a lot more volume of finds, and the biggest and best find was a huge palm leaf! The only problem is that it has no coloration to it. I'm still happy with it! My plan was to glue this to a piece of plywood to help stabilize it for the 1100 mile drive home. It had a block of matrix left on the back, so on the morning of day 3 I carefully split that chunk off. Now I had to change my plan! It revealed a large fish on the back of the slab! Most likely a Phareodus, and looks in beautiful condition. Of course, the fault crack runs straight down the spine, but I used paraloid to help glue the fault line and give it some more stability. Since I couldnt glue it down, I cut 2 pieces of plywood, wrapped the slab in a piece of packing blanket, and then used ratchet straps to hold everything tight for the ride home. After 3 days we did have quite a lot of material to haul home, but I had enough boxes for it all, and so far everything seems to have arrived some safe. I havent opened up the palm/pharo yet. fingers crossed. We still didnt find our stingray this year. I guess we'll just have to keep trying. Edit to add, I almost forgot to mention that I got the chance to meet up with @Ptychodus04 in Kemmerer. We were both in the area for fish at the same week, but in different quarries. We had a chance to meet up for dinner with crew (I'm sorry, I'm terrible with names). It was great to meet you Kris, I hope you had a fabulous hunt! On the trip home, I made a detour to visit the Dinosaur National Monument. It wasnt originally planned, but when I noticed how close we were to Vernal, UT, I coudnt pass it up. Covid prevented me from visiting on my last trip to Utah, but no this time. If youve never been, I highly recommend a visit! Its a truly incredible sight to see so many articulated bones in one place, still in the matrix as discovered. Even more impressive is that a lot of specimens actually have already been removed, and the site was originally so much bigger.
  11. 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!
  12. 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
  13. 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: Cope, Edward D. (1870). Observations on the Fishes of the Tertiary Shales of Green Nov. River, Wyoming Territory. Proc. Amer. Philos. Soc. Vol. 21 XI, pp. 380-384. Grande, L, (1984). Paleontology of the Green River Formation, with a Review of the Fish Fauna. Bulletin 63, the Geological Survey of Wyoming.
  14. Winter Hobby

    Diplomystus

    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!
  15. 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 We started the trip with a bonus dig, meeting up with fellow forum member @minnbuckeye for a guided Ordovician hunt in Fennimore, Wisconsin (THANKS MIKE!) Unfortunately I neglected to take pics of the site so I will only be able to share a farm pic we passed on the way. Mike was a gracious host who kicked off the visit with a gift of several fossil samples from his home turf As with all of the fossils from this trip, all finds are as they arrived back home, no prep. Some of our finds from Fennimore:
  16. 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.
  17. 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:
  18. 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 Clarkia Fossil Bowl in Idaho, a fantastic location for Miocene age leaves (Langhian Stage, ~15Mya) tucked behind a motocross track. These poor fossils have been through it all in the year between when they were found and when I finally got them dry. They’ve been soaked several times, gone mouldy twice, frozen at least once and flown across the Atlantic Ocean, all before spending the last 8 months in the refrigerator. Amazingly all but two of them survived perfectly including one of my favourite finds, a tiny flower. A maple leaf (genus Acer) still partly covered in matrix but with the stem intact. At some point I hope to get this one prepared. The best leaf find of the trip, with beautiful red coloration and mottling from fungus. A partial leaf, with beautiful vein preservation. The next spot was the American Fossil quarry in Kemmerer Wyoming to look for Eocene fish (Green River Formation, Ypresian Stage, ~53-48Mya). Splitting though the material left out by the quarry we found a few fish, primarily Knightia and Diplomystus. The best Knightia, including the best fish of the day with its head still partly covered. Some of the Diplomystus. The first needs some repair as it broke through the tail. The second has a counterpart as well and I’m hoping to frame it soon. And a mystery fish, I don’t know what species this is, it could just be Knightia or Diplomystus but it doesn’t look like the others we found. The star find came close to the end of the time at the quarry, a section of a puddle layer packed full of Knightia, at least a dozen fish piled on top of each other. The quarry manager was kind enough to let me take the blocks without splitting them thinner since the material is full of fractures and likely would not have survived. The layer as it split in the quarry (US size 13 hiking boot acting as a rough scale). The three pieces I managed to recover. The blocks are currently in a storage unit in Washington until I can figure out how to get them prepared. I am hoping the first two pieces can be reunited and the part and counterpart can be mounted side by side but I’m unsure about how to accomplish this. If anyone who prepares Green River fish has any ideas please let me know. The third locality we visited was Westgard pass in Inyo California, hunting for Cambrian archaeocyathids (Poleta Formation, Cambrian Stage 3, ~ 520Mya). We were only there a short time as there was a lot of driving to do that day, but I still managed to find one example in cross section. My girlfriend was more lucky, finding four examples. These are our favourites, particularly the third, which exhibits some dimensionality in addition to the cross-section. I’m absolutely thrilled to find anything Cambrian, and to make things even better the fossil locality is just down the road from the Ancient Bristlecone Pine Forest, home to living trees more than 4,000 years old and one of my favourite spots on the whole trip. We also visited Capitola Beach to search for rolled cetacean bone. I found two examples with one clearly showing the cancellous internal bone texture. To cap off the trip I wanted to do a fossil hunt in my home state of Washington. Since I still don’t know where to go to look for the elusive Pulalius crab, we decided to search the West Twin River site for shrimp concretions (Pysht Fomration, Oligocene, ~22-33Mya). We found over a dozen of these containing partial shrimp. I think they are all Callianopsis clallamensis since this is a common species at this locality. The first concretion that I found after identifying the right material. Another shrimp nodule containing a large section of claw. The head of a shrimp. Two non-crustaceans, a gastropod internal mould and a beautiful white bivalve in a small concretion. A mystery concretion with something eroding out from both ends. And last, one of the strangest concretions I have ever seen. The outside is hardened but the inside is a soft clay consistency with several bits of shrimp shell, completely the opposite of the hard in the middle concretions I’m used to. In all, it was a fantastic trip. I would love to go back to all the sites we visited, and there is so much more to explore next time I’m stateside. I’m looking forward to getting out hunting again. Stay tuned for the next big trip to celebrate finishing our masters. Benton
  19. 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.
  20. 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
  21. 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"
  22. 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
  23. 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 be appreciated. Jared
  24. 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 so I had a hard time getting to the quarry. The oily lime based rock wouldn't split properly until about noon but I hauled some decent Knightia's out. These aren't your prized, rare, fish but they are still a blast to dig up. Pulled out about fifty and worked all day. With all the mud and rain I seriously didn't think anyone would show up but Friday was very busy. About fifty in total came. The morning was tough. Lots of muddy rock to split and it just didn't want to split evenly. Everything would crumble on me. As you can see in the picture below things were muddy and wet. This Knightia has some pretty nice curves. Another curvaceous fossil. I'm in love. The split fish come in their varieties. Usually I only keep the ones that are completely filled in then put a sealant over them. This one looks alright considering it's a bit patchy. This one will be fun to prepare with my new CP9361 and some very careful handling of the scribe. This is one of my A grade Knightia's from the trip. Great color. The tail can be teased out a bit more. I really like how the vertebrae pop out in a 3D manner. Keep on fossiling!
  25. 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 Erismatopterus does not exceed 12cm with an average length of about 5cm. The Order Percopsiformes is a small order of North American freshwater fishes that includes three families: Amblyopsidae (cavefishes); Aphredoderidae (pirate perches); and Percopsidae (trout-perches). Closely related to neither trout nor perch, trout-perches have characteristics of both the trout and perch families. They exhibit characters of the salmonids, such as an adipose fin, cycloid scales, and soft fin rays, as well as characters of the percids, such as dorsal and anal fin spines, and ctenoid scales. Trout-perch are generally silvery in appearance, often with a partially transparent appearance, and relatively large heads and eyes. They are small fish with weak fin spines, and an adipose fin similar to those of trouts. They feed on insects and small crustaceans. Fossil percopsids are only known from North America, the current home of the extant genus Percopsis References: E. D. Cope (1877) A contribution to the knowledge of the ichthyological fauna of the Green River shales. Bulletin of the United States Geological and Geographical Survey 3(4):807-819. Grande, L. (1984): PALEONTOLOGY OF THE GREEN RIVER FORMATION, WITH A REVIEW OF THE FISH FAUNA. THE GEOLOGICAL SURVEY OF WYOMING, BULLETIN 63,
×
×
  • Create New...