The purpose of this study is to synthesize the radiolarian assemblages in the sediment samples south of 60°S in the Southern Ocean in terms of their taxonomic composition and paleoceanographic distribution. The radiolarian assemblages were examined from

The study of circum-Antarctic sediment samples from south of 60 °S reveals the presence of a distinctive coastal assemblage in shallow waters around Antarctica. This assemblage consists primarily of just two species, Rhizoplegma boreale (Cleve) and Phormacantha

This paper is a contribution to the knowledge of the family Rhizosphaeridae. Based on the study of several Late Jurassic (early Tithonian), Paleocene, Miocene and Quaternary species, I tried to understand its evolution and to establish its taxonomic basis.