I Know Dino Podcast Present Notes: Buitreraptor (Episode 144)

In episode 144 we evaluate the 1970 film When Dinosaurs the Dominated Earth.

Episode 144 can also be about Buitreraptor, a dromaeosaurid that lived within the Cretaceous in what’s now Argentina.

We had a good time SVP! Huge due to all our patrons! If you wish to be part of this superior group of dinosaur fanatics, take a look at our Patreon at https://www.patreon.com/iknowdino

Subsequent week we’ll begin to focus on what we realized at SVP (there’s method an excessive amount of to slot in only one episode)

You’ll be able to take heed to our free podcast, with all our episodes, on iTunes at:


On this episode, we focus on:


  • New largest troodontid foundLatenivenatrix mcmastera which had been beforehand lumped with Troodon
  • A brand new sequence of papers on the historical past of Megalosaurus have been discovered courting again to the late 1600s
  • Paleontologists from Australia, China, Italy, and Canada discovered a practically full hadrosaur in Peace County, CA
  • A brand new documentary which was filming final month in Glen Rose, TX will cowl how T. rex sounded
  • Atlas Obscura revealed an amazing publish in regards to the dinosaurs of roadside America documented by John Margolies

Dinosaur of the day: Buitreraptor

  • Dromaeosaurid that lived within the Cretaceous in what’s now Argentina
  • 4 skeletons present in 2004 in Patagonia, by a group led Sebastián Apesteguia and together with Peter Makovicky, throughout an excavation
  • Described and named in 2005 by Macovicky, Apesteguía, and Federico Agnolín
  • Kind species is Buitreraptor gonzalezorum
  • Title means “vulture raider”
  • Buitreraptor was discovered within the fossil website La Buitrera (the “vulture roost”)
  • Species title is in honor of Fábian and Jorge González, who helped excavate and put together the fossils
  • Solely two specimens have been described
  • On the time Buitreraptor lived, South America was an remoted continent
  • Discovery of Buitreraptor confirmed scientists that dromaeosaurs lived in additional areas of the world than beforehand thought (it was the primary proof of dromaeosaurs in South America), and that they appeared round 180 million years in the past, earlier than Pangaea broke aside (although later research discovered they didn’t seem till 160 million years in the past, and a few scientists suppose dromaeosaurids began in Laurasia and migrated to Gondwana within the Cretaceous, since dromaeosaurs from the Southern Hemisphere have traits that nother dromaeosaurs do not need)
  • Buitreraptor reveals mosaic evolution (has dromaeosaurid, troodontid, and avian traits)
  • Had a bird-like pelvis, wing-like forelimbs, and a big, hole wishbone
  • Just like Rhonavis (which beforehand had been thought of a primitive chicken, however now thought of probably to be a dromaeosaur)
  • Estimated to be about 5 ft (1.5 m) lengthy, and weigh about 6.6 lb (3 kg)
  • Had an elongated head
  • Had small enamel, in comparison with top of its cranium (0.6 to 4.6 mm tall)
  • Had lengthy, slender jaws (good for preying on small lizards and mammals that conceal amongst rocks)
  • Tooth have been recurved and angled in the direction of the again of the mouth, so they might have been like hooks to maintain prey in its mouth
  • Tooth have been additionally serrated, good for slicing into flesh
  • Tooth additionally had grooves on the floor of the crown
  • Had loads of enamel (about 25), which is greater than different Laurasian dromaeosaurids, that had 11-16 enamel
  • Had a sickle claw on the second digit of its foot, which was quick and broad (in all probability used for pinning prey)
  • Had lengthy forelimbs with three fingers on every hand (fingers have been proportionately shorter than different dromaeosaurids, and every finger was about the identical size, not like different dromaeosaurids, whose second digits have been longer)
  • Had an elongated physique and shallow ribcage
  • Might have had feathers, as a result of Microraptor and Sinornithosaurus, who’re family, did have feathers (although no feathers have been discovered)
  • Probably prey for bigger animals (Mapusaurus and Giganotosaurus, who lived across the identical time and place)

Enjoyable Truth:

  • Aside from sauropods, most herbivorous dinosaurs don’t present indicators of pneumaticity (i.e. air sacs invading bones “hole bones”)
  • Possibly different herbivores didn’t have air sacs in any respect
  • This could match higher with the normal classification of saurischians together with theropods & sauropods (with pneumaticity) & ornithischians in a separate group
  • Pterosaurs even have pneumaticity
  • Doable paths that led to this trait being shared:
    • Frequent ancestor to all dinosaurs & pterosaurus have “hole bones” and fancy air sacs for respiratory
    • Misplaced in ornithschians
    • Evolve independently in pterosaurs & dinosaurs
    • Ornithischians even have air sacs, however they only didn’t invade their bones
    • Want to seek out higher fossils to make sure.

If you wish to be part of this superior group of dinosaur fanatics, take a look at our Patreon at https://www.patreon.com/iknowdino

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