Results of the ecostratigraphic analysis using statistical data handling of radiolarian fauna from the sections of holes 434, 434A, 434B firstly allow us: 1) to identify the stratigraphic succession and some hiatuses in the hemipelagic sedimentation,

This study of 24 surface sediment samples along longitude 175°E between latitudes 48°N and 14°S in the western Pacific Ocean documents the relationship between the modern distribution of radiolarian assemblages and present oceanographic conditions. Ninety-two

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.