Episode 318: Bagualia alba: The Rise of Sauropods


Episode 318 is all about Genyodectes, The primary theropod described from South America.

Massive due to all our patrons! Your assist means a lot to us and retains us going! In the event you’re a dinosaur fanatic, be part of our rising group on Patreon at https://www.patreon.com/iknowdino.

You may take heed to our free podcast, with all our episodes, on Apple Podcasts at:

On this episode, we focus on:


  • An extinction occasion within the Early Jurassic could have led to the dominance of Eusauropods, together with the not too long ago named Bagualia supply
  • The brand new Triassic theropod Erythrovenator was present in Southern Brazil supply
  • In Fast Metropolis South Dakota, Dinosaur Hill is getting renovated to turn into extra accessible supply
  • New graphic novel popping out subsequent July referred to as Operation Dragon that includes a Japanese-trained dinosaur military supply

The dinosaur of the day: Genyodectes

  • Ceratosaur theropod that lived within the Cretaceous in what’s now Chubut Province, Argentina (Cerro Barcino Formation)
  • Kind species is Genyodectes serus
  • Genus identify means “jaw chunk”
  • Species identify means “late”
  • Holotype consists of a part of the snout (premaxillae, components of the maxillas, proper and left dentary, tooth, and extra)
  • Not nicely preserved, a few of it’s articulated
  • Carnivorous
  • Had giant, protruding tooth, just like Ceratosaurus (lengthy and curved)
  • The way in which the tooth are organized within the premaxilla is exclusive, and solely seen in Ceratosaurus. The distinction between Genyodectes and Ceratosaurus is Ceratosaurus had three tooth in every premaxilla, and Genyodectes had 4
  • Estimated to be 20.5 ft (6.25 m) lengthy and weigh 1740 lb (790 kg)
  • Described in 1901 by Sir Arthur Woodward
  • Santiago Roth collected the fossils for the Museo de La Plata
  • Some quotes from Sir Arthur Woodward’s description:
  • “All of those tooth are a lot damaged”
  • “Sadly, nothing is thought of the jaws which bore related tooth throughout the Cretaceous interval within the Northern hemisphere; however it appears most likely that the completion of the tooth-sockets and the paucity of successional tooth in Genyodectes are characters indicating that it was one of many newest and most specialised members of its race.”
  • Second non-avian dinosaur described from South America, after Loncosaurus
  • First recognized theropod described from South America
  • For some time regarded as a nomen dubium, as a result of fossils have been so fragmentary, however a redescription in 2004 by Oliver Rauhut discovered it to be legitimate
  • At totally different factors regarded as megalosaurid, tyrannosaurid, theropoda incertae sedis, and abelisaurid. However Oliver Rauhut’s re-exaxmination eliminated the holotype from its “synthetic matrix” and located it to not have abelisaurid and tyrannosaurid traits, however to have many neoceratosaurian traits, and located it most likely got here from the Cerro Castaño Member of the Cerro Barcino Formation (earlier than, not fully clear the place the fossils had been discovered, however recognized they have been present in purple sandstone)
  • Oliver Rauhut reprepared the kind materials. He wrote: “As is the case with the bones of the cranium, the dentaries are reasonably large”
  • Tooth within the premaxilla have been shut collectively and in “an overlapping en-echelon sample” (parallel formation at a slanted angle)
  • The correct aspect of the cranium was barely deformed however not the left
  • Had lengthy maxillary tooth crowns, that have been longer than the “minimal peak of the dentary” (additionally solely seen in Genyodectes and Ceratosaurus, up to now)
  • Helps present early diversification of neocertosaurs in South America
  • Fossils are on the Museo de La Plata in Argentina
  • Different dinosaurs that lived across the identical time and place included titanosaurs Patagotitan and Chubutisaurus, and carcharodontosaurid Tyrannotitan

Enjoyable Reality:
From a phylogenetic standpoint, people are cynodonts. Cynodonts and different animals dominated the Triassic earlier than Dinosaurs stole their thunder.


Leave a Comment