DGRN

The Barra Velha carbonates are widely known for their complexity regarding facies, diagenetic features, and depositional history. The absence of recent analogues representing the depositional setting of these rock formations leaves many uncertainties concerning the sedimentary process that generated them.

Storm deposits are common in geological records and encompass a variety of fossil assemblages affected by taphonomic processes that can biased fossil preservation. Here, we describe a microfossil bonebed to demonstrate the role played by certain filters in the final composition of storm-generated fossil accumulations. These layers are recurrent in the Paraná Basin and possibly in other localities of Gondwana, outcropping over 1000 km in the Permian units of the basin.

Abstract

Spiders (Order Araneae) can be found in all continents, except Antarctica. This order has a long evolutionary history that began during the Paleozoic Era. Despite this prolonged span and the diversity of extant species, the fossil record of spiders is relatively modest, with most specimens preserved in amber and found in the Northern Hemisphere. Taubaracna maculosa nov. gen.

The origin of the air sac system present in birds has been an enigma for decades. Skeletal pneumaticity related to an air sac system is present in both derived non-avian dinosaurs and pterosaurs. But the question remained open whether this was a shared trait present in the common avemetatarsalian ancestor. We analyzed three taxa from the Late Triassic of South Brazil, which are some of the oldest representatives of this clade (233.23 ± 0.73 Ma), including two sauropodomorphs and one herrerasaurid.

Abstract

Background: Currently, palaeontology professors have been challenged to update and incorporate innovative teaching approaches into their planning to help students develop the necessary skills and competencies.