title: Pterocystis caudata sp. n. – the new species of centrohelid heliozoans (Pterocystidae, Pterocystida, Centroplasthelida) from the Bay of Villefranche, France
abstract: A new species of centrohelid heliozoans Pterocystis caudata sp.n. from the Bay of Villefranche (France) was studied with light and electron microscopy.The cell diameter is 7.6-19.0(av.12.4) µm.P. caudata has scales of two distinct types.Plate scales (2.08-3.48(av.2.6) × 1.07-1.65 (av.1.3) µm) are flat, oval, with parallel edges and axial thickening.Spine scales (2.47-7.1 (av.4.6) µm) with a funnel-shaped base, which is indistinctly continuous with a shaft.The shaft demonstrates gradual levels of
journal: Protistology