The Brazilian mesozoic conchostracan faunas: its geological history as an alternative tool for stratigraphic correlations

GALLEGO, O.F.; MARTINS-NETO, R.G.

Revista Geociências

UNESP

Lugar: Rio Claro; Año: 2006 vol. 25 p. 231 - 239

1980-900X

In this contribution the conchostracan (time-space) distribution across the Brazilian geological column is analysed. Its potential application to the stratigraphical and paleogeographical correlations is proposed. The Jurassic-Cretaceous conchostracan faunas are briefly revised from the taxonomic point of view, including their problematic, collecting facts and its stratigraphical distribution. Such aim of the study is based on the faunal similarities, also that there are many species in common across both periods. As reported previously by different authors there are close relationships between Brazilian and central African faunas, now tentatively extended to Venezuela and southern South America. Likewise, relationships between Chinese and West Gondwanan faunas are confirmed. Tentatively seven conchostracan assemblages based in their biochron are proposed. Comparison with the Jurassic-Cretaceous conchostracan assemblages from China and others are made.