Gene sequences form the primary basis for understanding the relationships among extant
plant groups, but genetic data are unavailable from fossils to evaluate the affinities of extinct …

Abstract The Crato Formation palaeoentomofauna from the Lower Cretaceous (Aptian) of
northeast Brazil is extremely well preserved. Crato insects are often complete with abdomen …

Fluctuations in cell densities are common in the secondary xylem of gymnosperms from the
lower Permian of Maranhão, northeastern Brazil, but they lack any distinct annual growth …

This work presents a new fossil plant-bearing area located in the municipalities of Duque
Bacelar and Coelho Neto, Maranhão State, Brazil, recovered from lower Permian …

Abstract The Jandaíra Formation, Potiguar Basin, is well known for hosting a rich marine
fauna from the Late Cretaceous of Brazil. Among the organisms that compose this diverse …

The Ipubi and Romualdo Formations are Cretaceous units of the Araripe Basin (Santana
Group). The first and most ancient was deposited in a lake environment, and some fossils …

Apresenta-se aqui uma nova ocorrência de plantas fósseis na Formação Pedra de Fogo,
Permiano inicial da Bacia Sedimentar do Parnaíba, NE do Brasil. A ocorrência, aqui …

The Talbragar Fish Bed is one of Australia's most important Jurassic deposits for freshwater
fishes, land plants and aquatic and terrestrial insects. The site has yielded many well …

In this paper we performed the study of two coprolites (fossilized feces) collected from the
exposed levels of the Pedra de Fogo Formation, Parnaiba Sedimentary Basin, and Rio do …

Spectroscopy information (functional groups and semiquantitative data) by F ourier
transform infrared (FTIR) spectroscopy of S pongiophyton K räusel emend. C haloner et al. is …