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Abstract
The Brazilian Cretaceous basins located at the northeastern region of Brazil present a wide distribution of dinosaur tracks and isolated footprints in many environmental settings: alluvial fans, braided and meandering fluvial floodplains, marginal lake borders and tidal flats. They are mainly theropod and sauropod footprints of Neocomian and Cenomanian ages that are found in Sousa, Uiraúna-Brejo das Freiras, Araripe, Cedro, Malhada Vermelha, Lima Campos and São Luís Basins. The vertebrate ichnofossils are important biogenic sedimentary structures, a picture of the interaction between dinosaur's behavior and the substrate nature, allowing the paleobiological analysis and inferences about the palaeoenvironments.
ACKNOWLEDGEMENTS
To Professor Giuseppe Leonardi for his efforts on developing ichnological research on the Brazilian Cretaceous basins and Dr. Heloisa Vargas Borges, Dr. John Foster, and Dr. Debra Mickelson for their critical review of the manuscript. Financial support for the research was provided by Instituto Virtual de Paleontologia/Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Fundação Universitária José Bonifácio (FUJB), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, grant no. 300571/2003-8) and Universidade Federal do Rio de Janeiro (UFRJ).