Episode 479: Two Monumental New Sauropods from Argentina!

Episode 479: Two Monumental New Sauropods from Argentina! “One of many largest sauropods ever recorded” and a contender for the most important rebbachisaurid had been each present in Argentina. Plus a brand new titanosaur from China. And Cary Woodruff joins to debate his current finds and plans for a brand new everlasting dinosaur exhibit in Miami, Florida


  • A brand new rebbachisaurid sauropod, Sidersaura marae, had star formed bones in its tail and lived alongside Argentinosaurus supply
  • A brand new titanosaur named Gandititan cavocaudatus was discovered with a cranium and 6 articulated neck vertebrae supply
  • A brand new monumental titanosaur, Bustingorrytitan shiva, is estimated to have weighed over 70 tons supply


Cary Woodruff is the Curator of Vertebrate Paleontology on the Phillip and Patricia Frost Museum of Science in Miami, Florida. Comply with him on twitter @DoubleBeam and take a look at his papers on Analysis Gate.


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The dinosaur of the day: Hungarosaurus

  • Nodosaurid ankylosaur that lived within the Late Cretaceous in what’s now western Hungary (Csehbánya Formation)
  • Appears to be like just like different nodosaurs, equivalent to Borealopelta
  • Walked on all fours low to the bottom, had an extended tail and small head, and physique coated in armor (osteoderms), with spikes on the again and across the hips
  • No membership on the finish of the tail
  • Estimated to be as much as 13 to 16 ft (4 to 4.8 m) lengthy
  • Cranium estimated to be 12.5 to about 14 in (32 to 36 cm) lengthy
  • Estimated to weigh between over 1,400 to over 1,500 lb (650 to 688 kg)
  • Had a slender higher arm (humerus) that was lengthy, about 18 in (45.5 cm) lengthy
  • Kind species is Hungarosaurus tormai
  • Named in 2005 by Atilla Osi
  • Genus title means “Hungarian lizard”
  • Fossils first present in 2000
  • Species title in honor of András Torma, who discovered the fossils
  • 4 people discovered at first, and so they had been collectively
  • Holotype is within the collections on the Hungarian Pure Historical past Museum in Budapest
  • 450 bones of the holotype discovered, and consists of elements of the cranium and jaw, neck vertebrae, again and tail vertebrae, tendon fragments, ribs, elements of the shoulder and hand, a part of the pelvis, and greater than 100 osteoderms
  • Discovered to be totally different from Struthiosaurus, a nodosaur additionally identified from Hungary, based mostly on variations within the cranium (Hungarosaurus regarded as extra derived than Struthiosaurus)
  • A fifth skeleton and a few remoted bones had been later discovered and described
  • Remoted bones had been from the skulls of juveniles
  • A research in 2021 regarded on the cranium ornamentation, and located three totally different sizes, which they interpreted as representing totally different development phases (they weren’t allowed to do histology on the bones)
  • Doesn’t appear to have osteoderms on the skulls
  • All of the fossils had tough texturing on the premaxilla and nasal, and a pointy crest-like ridge on the postorbital (behind the attention)
  • Discovered variation that appeared to correlate with development (skulls regarded totally different relying on their dimension and presumed age)
  • Discovered that the sample of the ornamentation modifications as Hungarosaurus obtained bigger
  • Smallest premaxilla (entrance of the jaw) was about half the dimensions of the holotype, and regarded as from a juvenile or subadult
  • The smallest fossil studied had deep, giant pits and grooves as ornamentation
  • On the bigger fossils, the ornamentation was “barely irregular” with much less pitting and had shallow holes
  • Potential there’s some variation between people or the best way the bones fossilized and even sexual dimorphism, however arduous to know for certain
  • A research of Hungarosaurus tooth in 2022 discovered that Hungarosaurus most likely ate gentle vegetation (based mostly on tooth put on, and in comparison with Mochlodon tooth that wore down extra)
  • Probably ate flowering crops
  • Herbivore, and a low browser. Ate about 3.3 ft (1 m) off the bottom
  • Estimated to kind tooth inside between 63 to 126 days, with a mean of 94 days
  • Lived in a floodplain surroundings
  • Different dinosaurs that lived across the similar time and place embody Pneumatoraptor, a small paravian theropod, the rhabdodontid Mochlodon, abelisaurs, and sauropods, and birds
  • Different animals that lived across the similar time and place embody fish, amphibians, crocodyliforms, turtles, and pterosaurs

Enjoyable Reality:

There’s a group of sauropods referred to as Flagellicaudata which are named for his or her whip like tails.

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