title: Pterocystis infundibula sp. n. (Pterocystidae, Pterocystida, Centroplasthelida) – the new species of centrohelid heliozoans from the Gulf of Aqaba, Israel
abstract: A new species of centrohelid heliozoans Pterocystis infundibula sp. n. from the Gulf of Aqaba (Israel) was studied with light and electron microscopy. The cell diameter is 10.53-19.03 (average 13.73) m. P. infundibula has scales of two distinct types. Plate scales are 1.99-3.02 (av. 2.53) 1.10-1.54 (av. 1.35) m in size, flat, oval or slightly ovoid with an axial thickening. Spine scales are 1.39-5.22 (av. 2.88) m long, with a funnel-shaped base, which is indistinctly continuous with a shaft, dem
journal: Protistology