2 NEW DINOFLAGELLATE CYSTS - SPINIFERITES-PACIFICUS NOV-SP AND PENTADINIUM-NETANGEI NOV-SP FROM THE PLEISTOCENE OF THE NORTH-WEST PACIFIC

Two new species of Dinoflagellate cysts : Pentadinium netangei sp. nov. et Spiniferites pacificus sp. nov. are described from Pleistocene sediments of the Izu-Bonin Region, North-West Pacific (ODP Leg 125, Site 782A et Leg 126, Site 791B). Pentadinium netangei nov. sp. is characterised by an outfold of the periphragm along the parasutures, relatively hight and broadest at its base. The parasutural outfold is particularely developped at antapical area. This species indicates the possibility of an extension of the Tertiary genus Pentadinium GERLACH, 1961, emend. BENEDEK, GOCHT & SAPJEANT, 1982 until the Early Pleistocene. Spiniferites pacificus nov. sp. has gonal and intergonal processes and two large processes well developped at antapical area. This species is characteristic of the middle latitude of the Pacific Ocean.