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Temporal range: Carnian
~230 Ma
Bagualosaurus NT.jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Suborder: Sauropodomorpha
Genus: Bagualosaurus
Pretto, Langer & Schultz, 2018
B. agudoensis
Binomial name
Bagualosaurus agudoensis
Pretto, Langer & Schultz, 2018

Bagualosaurus (meaning "bagel lizard") is a sauropodomorph dinosaur and is the seventh known sauropodomorph discovered in Brazil. The type species is Bagualosaurus agudoensis and was described in 2018.[1]

Bagualosaurus lived about 223.23-230 million years ago.

Discovery and naming[change | change source]

The holotype specimen, consisting of a partial skull and jaw, twelve back vertebrae, two tail vertebrae, two chevrons, a pelvis, two partial hindlimbs annd five fragmentary ribs, was discovered on a ravine at the edge of a pond in rural Agudo in 2007. The fossil was kept in a closet of the Laboratory of Paleovertebrates of the Federal University of Rio Grande do Sul South, under the tutelage of Professor Cesar Schultz. This is what is commonly called "drawer paleontology". The fossil was described as a sauropodomorph on May 25, 2018.

Description[change | change source]

Size[change | change source]

It grew to about 2.5 meters (8.2 ft) long and about 1.3 (4.2 ft) long.

Diet[change | change source]

Bagualosaurus probably had a fully herbivourus diet. The fact that the Bagualosaurus already has a dentition well adapted to the consumption of vegetation is especially important for the evolutionary history of the dinosaurs. Pretto explains that all sauropods have two characteristics in common: gigantism and herbivorism. Bagualosaurus and other early sauropodomorphs may have adopted the leaf diet, which may have been the source of sauropod gigantism.

Paleoecology[change | change source]

Bagualosaurus lived in the Santa Maria Formaiton alongside an unnamed prosauropod and genera such as the carnivourus sauropodomorph Buriolestes, the proterochampsid Cerritosaurus and the possible theropod Staurikosaurus.[2]

References[change | change source]

  1. Flávio A. Pretto; Max C. Langer; Cesar L. Schultz (2018). "A new dinosaur (Saurischia: Sauropodomorpha) from the Late Triassic of Brazil provides insights on the evolution of sauropodomorph body plan". Zoological Journal of the Linnean Society. in press. doi:10.1093/zoolinnean/zly028.
  2. Langer, M.C.; Ramezani, J.; Da Rosa, Á.A.S. (2018). "U-Pb age constraints on dinosaur rise from south Brazil". Gondwana Research. X (18). doi:10.1016/