Novo registro de proterocampsídeo (Reptilia, Archosauriformes) do Triássico médio-superior do Brasil.

HSIOU, A.; ABDALA, F.; ARCUCCI, A. B.

REVISTA BRASILEIRA DE PALEONTOLOGIA

SOC BRASILEIRA PALEONTOLOGIA

Lugar: Porto Alegre; Año: 2002 vol. 3 p. 48 - 55

1519-7530

Proterochampsids are semi-aquatic archosauriforms, endemic to South America, with records from the middle Triassic Chañares Formation, the upper Triassic Ischigualasto Formation, both in Argentina, and the middle/upper Triassic Santa Maria Formation in southern Brazil. Three records of this group are known from Brazil, two of them (Proterochampsa and Chanaresuchus) are represented by skulls, and the third (Cerritosaurus), by a skull and postcranial elements. A new record for Brazilian proterochampsids, represented by a partial skull with the lower jaw, is described here. The inferior temporal fenestra shows the postero-inferior notch typical of proterochampsids. Features observed in the new specimen (e.g. superior temporal fenestra posteriorly divergent and triangle-shaped) identify it as Chanaresuchus bonapartei. Reappraisal of a specimen of the Brazilian Triassic previously considered as Chanaresuchus sp., indicate that, as it was recently suggested, the material is certainly part of the clade comprising Chanaresuchus/Gualosuchus, but its poor preservation prevents a better taxonomic precision.