Gryposaurus: I Know Dino Podcast Episode 131 скачать в хорошем качестве

Gryposaurus: I Know Dino Podcast Episode 131

Gryposaurus: I Know Dino Podcast Episode 131 I Know Dino: The big dinosaur podcast. News, interviews, and discussions about dinosaurs. Are you a dinosaur enthusiast? Learn more at   / iknowdino  . You can also visit http://www.IknowDino.com for more information including a link to dinosaur sites near you. This episode was originally published on May 31, 2017. Episode 131 features Gryposaurus a saurolophine with a narrow, arching nasal hump, that some have described as like a “Roman nose." The dinosaur of the day: Gryposaurus Name means “hooked nose lizard”, sometimes it’s been translated as “griffin lizard” Lambe was referencing the nasal arch, which resembled a gryphin (for the name “hooked beak”) Had a narrow, arching nasal hump, that some have described as like a “Roman nose” The term “gryposaur” is sometimes used to hadrosaurs with nasal arches Lived in the Late Cretaceous in North America Found in Dinosaur Park Formation in Alberta, Canada, Two Medicine Formation in Montana, and Kaiparowits Formation in Utah Similar to Kritosaurus, and for a while it was thought they were synonyms (long history) First fossils were collected in 1913 by George Sternberg, from Dinosaur Park Formation in Alberta. Found a skull and partial skeleton Multiple skulls, some skeletons, and some skin impressions have been found Lawrence Lambe described Gryposaurus in 1914 A few years before the Gryposaurus find, in 1910, Barnum Brown had found and described a partial skull from New Mexico, and called it Kritosaurus navajovius Brown’s specimen did not have a snout, so he restored it based on Anatotian (now Edmontosaurus), which had a flat-head Lambe described Gryposaurus differently (focused on the nasal crest), and in 1916 the Kritosaurus skull was remade to have the nasal arch. Barnum Brown and Charles Gilmore suggested the two were synonyms This influenced William Park’s decision to name a nearly complete skeleton found in Dinosaur Park Formation Kritosaurus incurvimanus, instead of Gryposaurus incurvimanus (and he let Gryposaurus notabilis stay as its own genus) Parks considered Gryposaurus to be a junior synonym of Kritosaurus Hard to compare Kritosaurus incurvimanus and Gryposaurus notabilis because Kritosaurus incruvimanus is missing part of the front of the skull, so we don’t see the full nasal arch Kritosaurus is only known from partial remians and seem very similar to Gryposaurus (except it lived a little later than Gryposaurus, based on the slightly younger formation where it was found) In 1942, Lull and Wright published a monograph on hadrosaurs and said Kritosaurus and Gryposaurus were the same But in the 1990s some scientists questioned Kritosaurus navajovius (limited material compared to other hadrosaurs), so some think the two genera are different Some scientists, such as Jack Horner, have suggested that Hadrosaurus is the same as Gryposaurus and Kritosaurus. This was a common hypothesis in the 1970s and 80s. But in 1990 Jack Horner changed his mind and said Gryposaurus was its own genera. Most scientists now think that Hadrosaurus and Gryposaurus have differences in their upper arms and iliums Horner described the specimens of a second species, Gryposaurus This based based on two parts of skeleton that was collected in 1916 for AMNH (also there was bonebed material) Three valid species: Gryposaurus notabilis, Gryposaurus latidens, Gryposaurus monumentensis (though could be 4-5, depending on who you ask) Type species is Gryposaurus notabilis To learn more about dinosaurs and I Know Dino, connect with us on the following sites: Facebook:   / iknowdino   Twitter:   / iknowdino   Tumblr:   / iknowdino   Google+: https://plus.google.com/u/0/100785970... Pinterest:   / dinosauria   LinkedIn:   / i-know-dino   Goodreads: https://www.goodreads.com/review/list... iTunes: https://itunes.apple.com/us/podcast/i... Sound Cloud:   / iknowdino   Stitcher: http://www.stitcher.com/podcast/i-kno... For more I Know Dino videos, subscribe to our YouTube channel at    / @iknowdino