This paper presents first comprehensive account of radiolarian taxa from the Pleistocene sequence of the Antarctic region. On the basis of 54 samples from the piston core KH94-4-AMR-2PC, 71 well-preserved radiolarian species were identified and illustrated.

The taxonomy of polycystine radiolarians is important for biostratigraphic, paleoecological and paleoceanographical reconstructions. In this study we describe four morphogroups of Actinomma boreale from the North-Atlantic and Arctic oceans. We distinguish

A morphometric study on the polycystine radiolarian species Actinomma boreale (Cleve) from ten trigger weight core-tops from the Norwegian-Iceland Seas, three piston cores taken offshore western Norway and three surface sediment samples from Lygrepollen,

Acantharea, Polycystinea, and Phaeodarea have members that are widely distributed in the marine plankton. Many biologists use the conventional term “Radiolaria” to include these three classes. However, on the basis of an 18S rDNA study, Polet et al. (2004,