Browsing by Autor "Alexander W. A. Kellner"

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    Museus e a divulgação científica no campo da paleontologia
    (Federal University of Rio de Janeiro, 2005) Alexander W. A. Kellner
    Museums are generally regarded as having high potential for science communication. In Brazil, however, those institutions are still far away from accomplishing this mission, particularly regarding paleontology. Here we discuss several aspects regarding science communication and museums. The three main activities associated to museums are research, repositories of collections and exhibitions. The collections of the Brazilian museums and the exhibits tend to be poor when compared with similar European and North American institutions, causing a distance between museum and society. Among the attempts of changing this picture, the Museu Nacional/UFRJ, in collaboration with the Museu de Ciência da Terra (DNPM), has organized in 1999 the temporary exhibition THE TIME OF THE DINOSAURS, which turned out to be the most visited exposition regarding fossils organized in the country so far. Among the several benefits of this exhibit was to increase the interest of the population regarding paleontology. This experience has shown that the museum must interact more strongly with the society in order to fully develop its potential of science communication.
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    Notas sobre Spinosauridae (Theropoda, Dinosauria)
    (Federal University of Rio de Janeiro, 2005) Elaine Batista Machado; Alexander W. A. Kellner
    Spinosaur remains were collected in Africa, Europa, Asia and Brazil, coming from deposits with ages ranging from the Late Jurassic to the Late Cretaceous. Although having a wide distribution - both geographically and temporally - little is actually known about the group since most specimens are incomplete. Up to now, only eight species were described. Spinosauridae is divided into the Baryonychinae (Suchomimus + Baryonyx + Cristatosaurus) and Spinosaurinae (Spinosaurus+ Angaturama + Irritator). Only in Africa members of both clades were found. One possible scenario that could explain the spinosaurid distribution, suggests that forms related to Baryonyx (the most primitive member of this clade) dispersed from Europe to Northern Africa, where Spinosaurinae were originated. Later, members of the Spinosaurinae further spread to South America.
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    Reavaliação da suposta ocorrência de Ornithischia na Formação Santana (Cretáceo Inferior), Bacia do Araripe, Nordeste, Brasil
    (Federal University of Rio de Janeiro, 2007) Elaine Batista Machado; Alexander W. A. Kellner
    Abstract