The Rio do Rasto Formation is a Late Permian sedimentary geological formation in the South Region of Brazil. The official name is Rio do Rasto, although in some publications it appears as Rio do Rastro.
Geography
It is found mainly in the Brazilian states of Santa Catarina, Paraná, and Rio Grande do Sul. It was formed during the Late Permian epoch of the Permian period.
Fossil content
The following fossils have been uncovered from the formation:
Flora
Schizoneura
Glossopteris
Paracalamites
Pecopteris
Bivalves
Leinzia
Palaeomutela
Terraia
Gastropods
Pseudestheria
Monoleiolophus
Euestheria
Asmussia
Liograpta
Synapsids
Anteosauria indet. Endothiodon Pampaphoneus biccai Rastodon procurvidens Tapinocephalidae indet. Tiarajudens eccentricus Titanosuchidae indet. Parareptiles Provelosaurus americanus Amphibians Australerpeton cosgriffi Bageherpeton longignathus Konzhukovia sangabrielensis Parapytanga catarinensis Rastosuchus hammeri Fish Paranaichthys longianalis Actinopterygii species A-C Xenacanthus ragonhai