松辽盆地阿尔必期微体浮游植物新属种

NEW ALBIAN MICROPHYTOPLANKTON FROM THE SONGLIAO BASIN, NORTHEAST CHINA

该文描述了松辽盆地中白垩世阿尔必期泉头组三段的微体浮游植物化石1新属7新种,隶属于微咸水沟鞭藻类2属5新种(含4新亚种),淡水绿藻1属1种和疑源类1新属1新种。并对沟鞭藻 Ngktericysta Bint,1986进行了修订。

The Albian microphytoplankton discovered from Member 3 of the Quantou Formation in theSongliao Basin consist mainly of slightly brackish water dinoflagellate cysts including Nyktericysta andOperculodinium, and freshwater chlorococcalean algae of Scenedesmus and Pediastrum, reflecting thatthe Songliao Basin was most probably a lake close to the seashore, upon which the seawater had oftenencroached. It is interesting that Nyktericysta and Scenedesmus are rarely associated with Operculodiniumwhich extends into the overlying transgressive beds. Here erected are five new species with four newsubspecies of dinoflagellates, one new species of chlorophyta and one new genus with one new speciesof acritarchs. In addition, the definition of Nyktericysta is emended.