made from those parts of the Argentine zoogeographic Benthic foraminifera from the southwestern Atlantic have been studied since 1839. However, despite the appearance province whose benthic foraminiferal fauna was poorly known. To supplement the material housed in the Buenos of about 60 articles dealing with the benthic foraminiferal Aires collection, the senior author visited various insti- fauna of this area, there is no single work which has at- tutions to study the original material of investigators such tempted to synthesize the taxonomy, distribution, and ecology of the fauna. Many of...