Abstract
This work aimed to characterize the macrobenthic foraminifera distributional pattern on Brazilian continental margin between Southern Bahia and Northern Rio de Janeiro states from samples obtained during Jops II cruise (Joint Oceanographic Projects), leg 8, in April 1995. Sampling was performed on 13 stations, with depths among 22 and 1285 m using either a box-core or a van-Veen grab sampler. After sampling, the sediment was washed through 1.0-0.5 mm mesh sieve, and the specimens picked and stained in 4% rose Bengal in order to differentiate living specimens. Macrobenthic foraminifera were represented by Rotaliida, Miliolida and Textulariida orders, being the first two more abundant and diversified in number of species. Rotaliida was a more diversified order in number of families, while Miliolida was represented by only five families. Several specimens showed alterations on their tests due to taphonomic process, such as Polychaeta tubes, and remains of other invertebrates, as well as corrosion, rusty colors and eroded tests. Foraminifera specimens were in general very large, a fact that could be hypothetically explained by the local upwelling phenomenon that raises biodiversity and increases the productivity into the region, as well as increasing the amounts of important elements such as calcium carbonate, carbon, and nitrogen of sediments.
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