Episode 414: An enormous carcharodontosaur and a tiny titanosaur

Episode 414: An enormous carcharodontosaur and a tiny titanosaur. Plus proof of a giant dinosaur from an island, a brand new juvenile T. rex specimen, connecting dinosaurs to chocolate, and way more


  • New “big theropod materials” could also be a 3rd carcharodontosaurid in Cretaceous Morocco or extra assist for the dinosaur Sauroniops supply
  • There’s a brand new titanosaur, Ibirania, which regarded like different sauropods though smaller—regardless of not being on an island supply
  • A brand new massopodan sauropodomorph Tuebingosaurus maierfritzorum has been named from Germany supply
  • A brand new juvenile T. rex was just lately fund and is on show in Colorado supply
  • A brand new research reveals that many dinosaurs had been endothermic (“heat blooded”), whereas others had been ectothermic (“chilly blooded”) supply
  • Shortly earlier than hatching, a chicken’s pelvis seems to be the identical as a dinosaur’s pelvis supply
  • Not all dinosaurs that lived on islands might have been small supply
  • Scientists recognized the primary file of dinosaur tracks in what’s now Palestine and revealed a pleasant set of standards for figuring out tracks supply
  • There’s at the least 38 trackways and greater than 350 dinosaur footprints on the TY tracksite in southern Africa supply



The dinosaur of the day: Zanabazar

  • Troodontid that lived within the Late Cretaceous in what’s now Mongolia (Nemegt Formation)
  • Appeared just like Troodon
  • Paleoart reveals massive claws, lengthy tail, S-curved neck, and feathered
  • One of many largest troodontids
  • Largest identified Asian troodontid
  • Estimated to develop as much as 7.5 ft (2.3 m) lengthy and weigh 55 lb (25 kg)
  • Cranium was 10.7 in (27.2 cm) lengthy
  • Had a big mind in comparison with its physique dimension
  • Fossils first present in 1964 as a part of the primary joint Mongolian-Soviet Paleontological Expedition
  • Initially named a brand new species, Saurornithoides junior, by Rinchen Barsbold in 1974
  • Kind species of Saurornithoides is Saurornithoides mongoliensis
  • Reclassified in 2009 as Zanabazar junior by Mark Norell and others
  • Zanabazar was the primary religious head of Tibetan Buddhism in Outer Mongolia (lived between 1635 to 1723)
  • Henry Osborn named Saurornithoides mongoliensis in 1924, primarily based on a cranium and fragments of the physique
  • On the time, Troodon formosus was identified solely from enamel and never acknowledged as a theropod, so Osborn in contrast Saurornithoides with Velociraptor, and instructed “it could show to have avian relationships”
  • Zanabazar was referred to Saurornithoides due to similarities (Saurornithoides was the one different well-known troodontid with a cranium), and each being from the Late Cretaceous of Central Asia
  • Extra troodontid specimens had been described within the Nineteen Eighties to early 2000s, which is why Zanabazar was re-examined
  • Holotype features a almost full cranium and braincase, some tail vertebrae, and proper hindlimb
  • Holotype vertebrae are utterly fused, which suggests it most likely was an grownup
  • Norell and others did CT scans and located sufficient variations between Saurornithoides junior (Zanabazar) and Saurornithoides mongoliensis. Each had been solely identified from their holotypes
  • Norell and others acknowledged this was solely primarily based on two specimens, however each holotypes are adults
  • Zanabazar is bigger than Saurornithoides
  • Zanabazar cranium is 272 mm (10.7 in) lengthy, and Saurornithoides cranium is 189 mm (7.4 in) lengthy
  • Zanabazar has extra enamel than Saurornithoides (118 in comparison with 108), the braincase seems to be barely totally different, and different particulars
  • Numerous similarities with Saurornithoides however could possibly be as a result of the similarities are plesiomorphic (ancestral characters) and shared with different troodontids, together with Troodon formosus
  • Two different troodontids have been described that had been discovered within the Nemegt Formation: Borogovia (identified from a partial hind limb) and Tochisaurus (identified from some foot bones). However, Zanabazar doesn’t have these bones preserved, so can’t examine and identified if a few of these dinosaurs are synonymous
  • Different dinosaurs that lived across the identical time and place embody tyrannosaurs, ankylosaurs, alvarezsaurs, dromaeosaurs, hadrosaurs, ornithomimosaurs, pachycephalosaurs, sauropods, therizinosaurs
  • Different animals that lived across the identical time and place embody amphibians, crocodylomorphs, fish, mammals, pterosaurs, turtles

Enjoyable Reality:

Over 200 animals and different issues have been named after J.R.R. Tolkien and his works.

Thanks Patrons!

Your assist means a lot to us and retains us going! If you happen to’re a dinosaur fanatic, be part of our rising neighborhood on Patreon at patreon.com/iknowdino

Leave a Reply

Your email address will not be published. Required fields are marked *