Microfossils in micrites from Serra da Bodoquena (MS), Brazil: taxonomy and paleoenvironmental implications

Abstract

Microfossils present in Quaternary micrites from Serra da Bodoquena, Mato Grosso do Sul State, Brazil, are here described for the first time. The studied taxa are: a) ostracods: Candona sp., Candonopsis sp., Cyclocypris sp., Cypria sp., Cypridopsis sp., Notodromas sp., Ilyocypris sp., Cyprideis sp., Wolburgiopsis cf. chinamuertensis (Musacchio 1970), Darwinula sp. and 5 morphotypes; b) microgastropod Acrobis sp., and c) Characeae remains and gyrogonites Chara sp.. The presence of these microfossils suggests clearwater shallow lacustrine paleoenvironments and the presence of aquatic vegetation. Similarities between microfossils and the living taxa suggest possible Holocene ages for these deposits, which is in accordance with previous C 14 dates.

First evidence of the Ediacaran fauna in Northeastern Brazil, an albino dolphin, and trophic groups of a bird community in Alagoas

“…In the last years, the Annals of the Brazilian Academy of Sciences (AABC) has published several interesting papers on paleontology, varying from Quaternary microfossils (Utida et al 2012), Argentinean woods from Santa Cruz (Vera and Césari 2012), Cretaceous lizards (Simões 2012), and turtle eggs from China (Wang et al 2013), just to mention a few. On the same lines, the present issue of the AABC presents another exciting contribution: the first evidence of the Ediacaran fauna in the Northeastern part of Brazil.…”