Episode 405: Theropods biting with Evan Johnson-Ransom

Episode 405: Theropods biting with Evan Johnson-Ransom. EJR joins us to debate theropods biting, his grasp’s thesis, and upcoming work on the Area Museum in Chicago

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Evan Johnson-Ransom, a PhD scholar on the Ross Lab and Sereno Lab on the College of Chicago, finding out neck kinematics and feeding habits of spinosaurids, T. rex, and different theropods. Comply with him on twitter @EJR_Paleo_MSc



The dinosaur of the day: Unescoceratops

  • Ceratopsian that lived within the Late Cretaceous in what’s now Alberta, Canada
  • Appeared type of like Psittacosaurus, walked on 4 legs, had a brief face with a beak, and quills (feathers?) on the tail
  • Small, estimated to be 3 to six.5 ft (1 to 2 m) lengthy and weigh 200 lb (97 kg)
  • Herbivorous, and doubtless ate low vegetation (not more than 3 ft or 1 m excessive)
  • Had spherical tooth
  • Had a parrot-like beak
  • Had a hatchet-shaped jaw
  • Had a brief frill, however no ornamentation on the cranium
  • Sort species is Unescoceratops koppelhusae
  • Fossil present in 1995
  • Holotype is a partial left decrease jaw
  • The holotype was discovered at a UNESCO World Heritage Web site (Dinosaur Provincial Park)
  • Referred specimen is a partial proper decrease jaw fragment
  • Regarded as too incomplete to explain for a couple of years, and was thought to belong to Leptoceratops
  • Ryan and Currie first reported on the fossil in 1998, as Leptoceratops sp.
  • Described in 2012 by Michael Ryan and others, and located to be one of the crucial superior leptoceratopsids
  • Genus identify means “UNESCO’s ceratopsian” or “UNESCO’s horned face”
  • Genus identify is in honor of UNESCO’s efforts to extend our understanding of pure historical past websites
  • Species identify in honor of Eva Koppelhus
  • Had similar variety of tooth sockets because the holotype of Zhuchengceratops
  • In 2013, Jordan Mallon and others checked out how herbivorous dinosaurs in Dinosaur Park Formation fed
  • Discovered most species ate meals about 3 ft (1 m) from the bottom, regardless of how a lot they weighed
  • Unescoceratops in all probability couldn’t attain above 1.6 ft (0.5) m whereas on all fours, however might rear as much as 1 m (3 ft), just like different small ornithischians within the space
  • Different dinosaurs that lived across the similar time and place embrace ankylosaurs, ceratopsians, hadrosaurs, theropods
  • Different animals that lived across the similar time and place embrace amphibians, crocodilians, lizards, fish, plesiosaurs, mammals

Enjoyable Truth:

There are as much as 15 identified genera in Spinosauridae.

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