I Know Dino Podcast Present Notes: Appalachiosaurus (Episode 155)

In our a hundred and fifty fifth episode, we acquired to talk with Dr. Matthew Lamannaassistant curator on the Carnegie Museum of Pure Historical past in Pittsburgh, Pennsylvania, whose analysis focuses on cretaceous dinosaurs of the southern hemisphere, with subject analysis in Antarctica, Australia, Argentina, and Egypt, and the mesozoic evolution of birds. You’ll be able to study extra about his work at Antarctic Peninsula Paleontology Challenge, at antarcticdinos.org.

Episode 155 can be about Appalachiosaurus, essentially the most well-known theropod from japanese North America.

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On this episode, we talk about:


The dinosaur of the day: Appalachiosaurus

  • Tyrannosauroid that lived within the Cretaceous in what’s now Alabama, US
  • Title means “Appalachian lizard”
  • Named after the area within the U.S., Appalachia, which is similar identify because the island continent the place Appalachiosaurus lived
  • Just one species: Appalachiosaurus montgomeriensis
  • Species identify is for Montgomery County, in Alabama
  • Most well-known theropod from japanese North America
  • Earlier than Appalachiosaurus was discovered, the one different tyrannosaur discovered within the japanese a part of the U.S. was Dryptosaurus (which is much less derived than Appalachiosaurus)
  • David King discovered the fossils in July 1982
  • Fossils had been present in central Alabama (Demopolis Chalk Formation)
  • Named in 2005 by Thomas Carr, Thomas Williamson, and David Schwimmer
  • Solely a juvenile has been discovered to this point
  • Solely partial stays have been discovered (elements of the cranium, some vertebrae, elements of the pelvis, many of the hindlimbs)
  • Fossils are on the McWane Science Heart in Birmingham, Alabama
  • Juvenile was over 23 ft (7 m) lengthy and weighed 1300 lb (600 kg)
  • Bipedal predator
  • Very comparable skeleton to Albertosaurus, although a comparability discovered that Albertosaurus had a stronger chunk power, and the 2 would have stuffed totally different ecological niches
  • Has six low crest traces on the highest of its snout (ornamentation?), additionally seen in Alioramus, an Asian tyrannosaurid
  • Undecided what its forelimbs seemed like, although most giant tyrannosaurids had small forelimbs with solely two digits on every hand
  • Deinosuchus tooth marks had been discovered on Appalachiosaurus (and there are indicators of therapeutic, two tail vertebrae had been fused collectively, probably due to new bone progress after the damage)

Enjoyable Reality:

Why did Ornithischians evolve quadrapedality? Presumably head mass (Ceratopsians); Herbivory (giant guts to deal with a number of fiber); or a shift in posture with head close to the bottom.


This episode is delivered to you partly by TRX Dinosaurs, which makes stunning and reasonable dinosaur sculptures, puppets, and reveals. You’ll be able to see some wonderful examples and works in progress on Instagram @trxdinosaurs

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