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Episode 258: Coprolite (fossilized poop) with Karen Chin


    Episode 258 is all about Anserimimus, The “goose mimic” from the Gobi Desert.

    We additionally interview Karen Chin, Affiliate Professor of Geological Sciences on the College of Colorado Boulder and Curator of Paleontology on the College of Colorado Museum of Pure Historical past, and he or she’s an knowledgeable in coprolites. Try a video of her work right here if you wish to see extra.

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    On this episode, we talk about:


    • Information from the third day of talks on the 2019 assembly of the Society of Vertebrate Paleontology supply
      • Dinosaurs had many alternative cranium, jaw muscle, and mind sizes, however we will solely simply research the small group that survived the mass extinction
      • Through the use of evo-devo we will now see how precisely fowl skulls type round their brains
      • Non-avian Dinosaurs rapidly developed many alternative skulls and jaws, however they don’t all the time mirror their feeding methods
      • We don’t see proof of dinosaurs earlier than the Carnian Pluvial Occasion, however fossil localities are restricted
      • A brand new statistical method could make it simpler to separate female and male dinosaur fossils
      • Some quadrupedal dinosaurs had a lot bigger hindfeet than front-feet, however the reason being nonetheless unclear
      • Massospondylus had very versatile progress charges, presumably indicating it was a “restoration taxa” profiting from the tip Triassic extinction
      • New Triceratops excavations discovered uncommon stays past simply the cranium, permitting us to measure how they modified as they grew
      • Late cretaceous ceratopsian brains modified form to permit for the large neck muscle mass they wanted to carry up their head
      • Australia has the very best ankylosaurs from Gondwana together with the brand new “Julia Creek” specimen
      • A brand new, bigger, Liaoningosaurus fossil was discovered by a farmer in China
      • Microstructure of pachycephalosaur domes could present that they did however heads
    • In Casper, Wyoming, the Tate Geological Museum now has Nicole the Torosaurus on show supply
    • The Pure Historical past Museum in London is taking pupil functions to review ceratopsian phylogeny supply
    • Austria is releasing a set of 12 glow at midnight 3-euro dinosaur cash supply
    • Mattel Movies is partnering with Daniel Kaluuya’s manufacturing firm to make a dwell motion Barney the dinosaur film supply
    • Jurassic World 3 will star DeWanda Smart and Mamoudou Athie, and can convey again characters Ian Malcolm, Ellie Sattler, and Alan Grant shall be within the movie supply

    The dinosaur of the day: Anserimimus

    • Ornithomimid theropod that lived within the Late Cretaceous in what’s now Mongolia
    • Genus identify means “goose mimic”
    • Named in 1988 by Rinchen Barsbold
    • Anser is the generic identify for some species of geese
    • Sort and solely species is Anserimimus planinychus
    • Doesn’t significantly seem like a goose, however different ornithomimosaurs have been named after different birds
    • Species identify means “flat claw” and refers to its flattened claws
    • Just one specimen, which is a reasonably full, articulated skeleton (no cranium and decrease jaws)
    • Discovered within the Gobi Desert within the Nineteen Seventies on a joint Soviet-Mongolian expedition
    • Estimated to be about 9.8 ft (3 m) lengthy and weigh 110 lb (50 kg)
    • Probably an omnivore
    • Most likely regarded much like different ornithomimids, however with extra highly effective forelimbs
    • Had lengthy, highly effective forelimbs
    • Had giant crests on the higher arm bones, to connect to giant arm muscle mass, like biceps
    • Had lengthy, straight (with a slight curve) claws on the hand, that had been fairly flat on the decrease floor
    • Not clear why it had such highly effective arms. Doable it was to collect meals, however the cranium is unknown, so not clear what it ate
    • Lanky and quick
    • The 5 bones between the wrist and fingers (metacarpus) had been fused, which added to its power
    • Additionally the foot was arctometatarsalian, which suggests the center metatarsal is compressed and is behind the opposite two metatarsals on the high, which can even have helped it with working
    • Most likely lived round streams and river channels, mudflats, and shallow lakes
    • Different dinosaurs that lived on the similar time and place included Gallimimus, Tarbosaurus, Deinocheirus, and smaller dromaeosaurids, oviraptorosaurs, troodontids, and birds, in addition to hadrosaurids like Barsboldia and Saurolophus, ankylosaurids like Tarchia, and a few titanosaurs and pachycephalosaurs

    Enjoyable Truth: Now we have coprolites relationship all the best way again to the Cambrian interval.