Episode 449: Tips on how to live to tell the tale a dinosaur stumble upon. Steve Brusatte joins to speak about a brand new ebook with recommendations on live to tell the tale within the Mesozoic. We additionally proportion two new dinosaurs, a spinosaurid from Spain and a extraordinary theropod from China
Information:
- There’s a brand new spinosaurid dinosaur, Protathlitis cinctorrensis, this is estimated to be 10–11m (33–36ft) lengthy supply
- A brand new small theropod was once named Migmanychion laiyang for its extraordinary hand claws supply
Interview:
Steve Brusatte, a paleontologist, paleontology guide for Jurassic International, and writer of quite a lot of paleontology books. He’s additionally the knowledgeable reviewer for a brand new Nationwide Geographic Youngsters ebook via Stephanie Warren Drimmer, known as “Tips on how to Live on within the Age of Dinosaurs”
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The dinosaur of the day: Claosaurus
- Hadrosauroid that lived within the Past due Cretaceous in what’s now Kansas, U.S. (Niobrara Formation)
- Most probably seemed reasonably very similar to Edmontosaurus, and had a duck invoice, and lengthy tail
- Herbivorous, most certainly walked on two legs and stood on all fours to graze meals
- Onerous to understand how giant it was once, as a result of there aren’t that many fossils, however Tom Holtz estimated it to be about 12 feet (3.7 m) lengthy
- At the beginning named via Marsh in 1872 as Hadrosaurus agilis
- In 1890 renamed to Claosaurus agilis (discovered to be too other from Hadrosaurus)
- Sort species is Claosaurus agilis
- Genus identify approach “damaged lizard”, refers back to the means the fossils have been discovered
- Discovered within the Niobrara Formation in Kansas, U.S.
- Most probably that the Claosaurus specimen died on shore and were given washed out to sea
- Discovered portions of the cranium and an articulated skeleton
- O.C. Marsh wrote: “The cranium of Claosaurus is lengthy and slender, with the facial portion particularly produced”
- Additionally wrote: “[…] the cranium presentations a blunt, rugose muzzle”
- Lots of the bones discovered are overwhelmed and flattened
- Fossils discovered come with vertebrae, portions of the chest and shoulder, portions of the palms, portions of the pelvis, portions of the legs and portions of the ft
- There have been two different Claosaurus species, however the ones are not regarded as legitimate
- Marsh named Claosaurus annectens in 1892, in accordance with two skeletons discovered within the Lance Formation (which later was Anatosaurus, then Edmontosaurus)
- In 1903, G. R. Wieland named Claosaurus affinis, in accordance with 3 toe bones discovered within the Pierre Shale in South Dakota (discovered together with fossils from an enormous sea turtle)
- The fossils were given blended up with Claosaurus agilis
- In 1948 Joseph Gregory discovered 3 toe bones identical in dimension within the Yale collections that seemed adore it got here from the Pierre Shale, however didn’t reassign the species (it was once older in age and too fragmentary)
- In 2004, Jack Horner and others discovered Claosaurus affinis to be doubtful
- In 1940, Claosaurus was once described partly via its large, leaf-like enamel. Walter Coombs Jr. in 1988 mentioned Claosaurus must be redefined in accordance with one thing rather then enamel traits
- In 2011, when Albert Prieto-Marquez discovered Hadrosaurus to be a sound dinosaur, additionally discovered Claosaurus agilis to be legitimate
- What makes Claosaurus distinctive is that the period of its deltopectoral crest (a ridge at the entrance of the higher arm) is lower than 48% the period of the humerus, in addition to main points within the ilium (a part of the pelvis)
- Gastroliths regarded as present in Claosaurus, however grew to become out to in all probability be gravel that washed in after the person died. Additionally seems it was once an Edmontosaurus specimen discovered with the “gastroliths,” now not Claosaurus (when Barnum Brown discovered the specimen in 1900, Edmontosaurus was once regarded as to be Claosaurus)
A laugh Reality:
A just right sense of scent would had been very helpful for herbivorous dinosaurs, now not simply those who spent their time looking and/or scavenging. Herbivores like ornithopods, Ankylosaurus, and the therizinosaur Erlikosaurus all most likely had a just right sense of scent.
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