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Large theropod tracks from Triassic(?) Caturrita Formation, Brazil



From: Ben Creisler
bcreisler@gmail.com

A new online paper:


Rafael Costa da Silva, Ronaldo Barboni, Tania Dutra, Michel Marques
Godoy & Raquel Barros Binotto (2012)
Footprints of large theropod dinosaurs and implications on the age of
Triassic biotas from Southern Brazil.
Journal of South American Earth Sciences (advance online publication)
http://dx.doi.org/10.1016/j.jsames.2012.06.017
http://www.sciencedirect.com/science/article/pii/S0895981112000831?v=s5


Dinosaur footprints found in an outcrop of the Caturrita Formation
(Rio Grande do Sul State, Southern Brazil), associated with a diverse
and well preserved record of fauna and flora, reopen the debate about
its exclusive Triassic age. The studied footprints were identified as
Eubrontes isp. and are interpreted as having been produced by large
theropod dinosaurs. The morphological characteristics and dimensions
of the footprints are more derived than those commonly found in the
Carnian-Norian, and are more consistent with those found during the
Rhaetian-Jurassic. The trackmaker does not correspond to any type of
dinosaur yet known from Triassic rocks of Brazil. Recent studies with
the paleofloristic content of this unit also support a more advanced
Rhaetian or even Jurassic age for this unit.