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Buriolestes
Buriolestes model
A model of Buriolestes schultzi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Superorder: Dinosauria
Order: Saurischia
Suborder: Sauropodomorpha
Genus: Buriolestes
Cabreira et al., 2016
Species: B. schultzi
Binomial name
Buriolestes schultzi
Cabreira et al., 2016

Buriolestes (meaning "Buriol's robber") is a genus of early sauropodomorph dinosaurs from the Late Triassic of Brazil. The type specimen was found alongside a specimen of the lagerpetid dinosauromorph Ixalerpeton.

Description[]

Although Buriolestes superficially resembles the predatory theropod dinosaurs, with jaws lined by finely serrated and slightly curved teeth well-adapted to a carnivorous diet, it in fact is an early member of the otherwise-herbivorous Sauropodomorpha, the group that gave rise to the giant sauropods. Characteristically sauropodomorph traits seen in Buriolestes include a downturned jaw tip and a long deltopectoral crest on the humerus. However, Buriolestes also lacks a small head and enlarged nostrils, which are typical among sauropodomorphs, and the medial condyle on the end of its tibia projects backwards, a distinctive feature (autapomorphy) unique to this animal

In Buriolestes, the shaft of the pubis is straight, in contrast to later sauropodomorphs, where it has been modified into an expanded "apron", theropods, where it forms a "boot", and all ornithischians, where it is reversed and is parallel to the ischium. Additional traits differentiate Buriolestes from both later and contemporary sauropodomorphs: the front expansion (preacetabular ala) of the ilium is relatively tall, the outer edges of the pubis are bevelled, the trochanter of the femur forms a shelf, and the metatarsal of the fifth digit on the foot is relatively long.

Classification[]

A phylogenetic analysis conducted in 2016 affirmed the sauropodomorph affinities of Buriolestes. Part of the phylogenetic tree from the study is shown below.[1]

Dinosauria

Ornithischia


Saurischia

Herrerasauridae




Daemonosaurus





Tawa



Chindesaurus





Eodromaeus




Guaibasaurus




Theropoda


Sauropodomorpha

Buriolestes




Eoraptor




Pampadromaeus




Panphagia




Saturnalia



Chromogisaurus





Pantydraco




Efraasia



Plateosaurus















Paleoecology[]

Buriolestes lived in Brazil in the Triassic in the Santa Maria Formation. It lived with the Prosauropods Bagualosaurus, Pampadromaeus and Saturnalia. The Theropods Gnathovorax, Nhandumirim and Staurikosaurus. And the Dinosauromorphs Amanasaurus, Gamatavus, Ixalerpeton, Spondylosoma and Venetoraptor.

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