Compiles detailed information for the specific identification of 30 zooplanktonic groups, and offers a review of species-specific geographic and vertical distribution patterns in the South Atlantic Ocean. This edition covers the abundant literature produced in the last decades, much of which is in the form of unpublished dissertations, internal reports, and articles in local journals of restricted distribution. For each zooplanktonic group the following information is included: comments on its general morphology, traits used in systematics, terminology, specific methodological aspects, classification, geographic distribution of the species in the South Atlantic, and vertical distribution patterns of the species in the South Atlantic.