New species of Neogene radiolarians from the Southern Ocean – part IV

In this last paper in our planned series, we describe 25 new radiolarian species from the Antarctic Neogene: 6 spumellarians (<em>Lithatractus</em>? <em>floridus, Spongopylidium</em>? <em>aerostatum, Haeckeliella hederacia, Larcopyle faustae, Excentrodiscus planangulus</em> and <em>E. lappaceus</em>) and 19 nassellarians (<em>Anthocyrtidium</em> sp., <em>Artostrobus</em>? <em>oganeae, Botryostrobus exstructus, Ceratospyris clarki, Cornutella burgundiensis, Cystophormis petrushevskayae, Dendrospyris quadripes, Enneaphormis tippula, Euscenarium funakawai, Lophophaena kamikurii, L. rhopalica, Lychnocanium andreae, Periarachnium pauliani, Peridium tortonianicum, Phormacantha garbela, Phormospyris punnulis, Rhodospyris</em>? <em>morleyi, Rhodospyris pulchra</em> and <em>Tholospyris tautessares</em>). We also report the finding of fragments of an unknown Middle Miocene phaeodarian (<em>Conchellium</em>? sp.).