A Unique Late Triassic Dinosauromorph Assemblage Reveals Dinosaur Ancestral Anatomy and Diet

Holotype ULBRA-PVT280 preserves recurved, serrated teeth and a gracile skeleton in a Late Triassic assemblage; the cited matrix maps faunivory near the sauropodomorph root, but neither the diet reconstruction nor the specimen establishes a direct ancestor of herbivorous sauropods.

Buriolestes ULBRA-PVT280 from the approximately 233.2 Ma assemblage anchors the 233.2–0 Ma Dinosauria route, with living birds extending the navigation span; the specimen does not establish a global dinosaur FAD or direct ancestry.

Buriolestes is anchored by holotype ULBRA-PVT280 from the approximately 233.2 Ma Late Triassic assemblage; it is a sampled occurrence, not a global genus or dinosaur first appearance and not a direct ancestor.

Buriolestes schultzi is based on articulated holotype ULBRA-PVT280, and the study recovers it among sauropodomorphs in its sampled morphology matrix; the matrix placement is not evidence of direct ancestry.

Holotype ULBRA-PVT280 includes a partial skull, axial skeleton, forelimb and nearly complete left hind limb, and preserves recurved, serrated teeth; these observations are limited to the named specimen.

This profile's geographic statement is limited to the Candelária Sequence of the Santa Maria Formation in Rio Grande do Sul, Brazil, where the holotype was collected; it does not assert a global distribution.

The recurved, serrated teeth of ULBRA-PVT280 are compatible with faunivory in the study's character-based reconstruction; habitat, locomotion, body size and guild remain bounded comparative interpretations rather than observed behaviour.