Episode 429: A mini ankylosaur and an enormous hadrosaur


Episode 429: A mini ankylosaur and an enormous hadrosaur. Plus Lindsey Kinsella joins to debate his new ebook “The Lazarus Taxa” which incorporates scientists touring to the Cretaceous and encountering many fascinating dinosaurs.


  • A brand new tiny ankylosaur from Patagonia, Patagopelta supply
  • Child tyrannosaurs could have been strolling pals supply


Lindsey Kinsella, a paleontology fanatic, and author & writer of the sci-fi novel The Lazarus Taxa which incorporates scientists time touring to the Late Cretaceous. Join with him on fb, instagram, twitter, or tiktok.



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The dinosaur of the day: Magnapaulia

  • Lambeosaurine hadrosaurid that lived within the Late Cretaceous in what’s now Baja California, Mexico (El Gallo Formation)
  • Very massive hadrosaur, with a crest on high of its head, a cumbersome physique that walked on 4 legs and had a tall tail
  • Initially estimated to be between about 49 to 54 ft (15 to 16.5 m) lengthy and weigh as much as 8.8 tons
  • In 2012, Prieto-Márquez and others estimated it to be round 41 ft (12.5 m) lengthy
  • Sort species is Magnapaulia laticaudus
  • Described in 1981 by William Morris
  • Initially Morris referred the fossils to Hypacrosaurus altispinus, primarily based on the lengthy neural spines of the tail, however then he modified it to cf. Lambeosaurus, primarily based on particulars of the premaxilla (higher jaw), after which he named it Lambeosaurus laticaudus (primarily based on its massive measurement and the tall neural spines within the tail)
  • Later scientists urged Lambeosaurus laticaudus may very well be Hypacrosaurus, or not a sound taxon
  • Named by Albert Prieto-Márquez, Luis Chiappe, and Shantanu Joshi as Magnapaulia in 2012
  • Genus title means “massive” and “paulia” is in honor of “Mr. Paul Haaga for his excellent assist to the analysis and public packages of the Pure Historical past Museum of Los Angeles County and its Dinosaur Institute”
  • Species title means “broad tail”
  • Fossils present in an excavation by the Pure Historical past Museum of Los Angeles County between 1968 and 1974
  • Holotype contains components of the jaw, vertebrae, components of the leg, components of the pelvis, and components of the arm
  • 24 referred specimens discovered, all inside 3 m of the place the holotype was discovered. Fossils embrace partial skeletons, and pores and skin impressions
  • Morris thought Lambeosaurus laticaudus spent its time within the water, as a result of it was so huge and it had such a tall, slim tail (good for swimming? may give it a push), weak connections within the hips, and a healed damaged thigh bone that he thought would have been too tough of an damage to outlive on land (simpler to get better within the water, much less weight on the leg)
  • Prieto-Márquez et. al mentioned that grownup hadrosaurids had been between 7 to 10 m lengthy, and Magnapaulia was for much longer (“one of many largest recognized hadrosaurid species, not solely in North America, however on this planet”), which makes it a “large” hadrosaurid
  • Chiappe wrote on his website that “The scale was so spectacular that it may have been mistaken for an Apatosaurus!”
  • Had a proportionately slender femur
  • Solely fragments of the crest have been discovered
  • Had elongated chevrons and vertebral spines, just like Hypacrosaurus, which meant it had a tall tail
  • Tail of 1 specimen discovered (LACM 17712) had pores and skin impressions with massive scales as much as 4 cm extensive, surrounded by 1 cm extensive hexagonal and rounded scales
  • Carefully associated to Velafrons, which was additionally present in what’s now Mexico (lined in episode 324)
  • Different dinosaurs that lived across the similar time and place embrace dromaeosaurs, tyrannosaurs, hadrosaurs, and ankylosaurs
  • Different animals that lived across the similar time and place embrace lepidosaurs, mammals, and amphibians

Enjoyable Truth:

Ankylosaurs like Patagopelta made it from North to South America throughout Panama throughout the “First American Biotic Interchange.”

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