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记述了二连盆地东北部早白垩世微体浮游藻类16属28种，分属于沟鞭藻类8属15种，含3新种：Fromeacirculatasp.nov,Nyktericystatrigonasp.nov.,Paucibucinapylophorasp.nov，绿藻3属6种，疑源类4属6种，含2新种：Porusphaeraerenensissn．nov，P．pylophorasp．nov，及黄藻1属1种。可将它们划分为2个组合：赛汉塔拉组三段的Parabohaidina－Fromea-Nyktericysta-Vesperopsis组合（即组合1）和哈达图组的Porusphaeraerenensis组合（即组合2）。较详细地讨论了它们的沉积环境和含沟鞭藻类层段的地质时代，认为赛汉塔拉组三段和哈达图组的时代为早白垩世中晚期，其中赛汉塔拉组三段可能为Barremian期；两个浮游藻类组合反映了较复杂的非海相流积环境，以为鞭藻类占优势的第一组合反映在赛三段沉积时是以半咸水一微咸水为主的湖相环境，以疑源类和绿藻占优势的第二组合反映哈达图组是以淡水为主的湖相沉积。
It is described that there are 28 species belonging to 16 genera of the Early Cretaceous microfacies in northeastern Erlian Basin and belonging to 8 genera and 15 species of Daphnipozoa, including 3 new species: Fromeacirculatasp. Nov, Nyktericystatrigonasp. Nov., Paucibucinapylophora sp. Nov, 6 species, 4 genera and 6 species, including 2 new species: Porusphaeraerenensissn. nov, P. pylophorasp. nov, and 1 genus 1 species. They can be divided into two combinations: the Parabohaidina-Fromea-Nyktericysta-Vesperopsis combination (ie combination 1) and the Porusphaeraerenensis combination (ie combination 2) of the Hadacon group. The sedimentary environment and the geologic epoch of the segment of ditch whorl algae are discussed in more detail. It is believed that the third member of the Saihantala Formation and the Hadatu Formation are of late Early Cretaceous. The third member of the Saihan Talla Formation may be And the Barremian period. The two pelagic algal assemblages reflect the complicated non-marine fluid environment. The first combination of the dominant dinoflagellates reflected in the deposition of the Seisen Section is a lake dominated by brackish water and brackish water The second combination of phase environment, predominant species and green algae reflects that the Hadatu Formation is a freshwater-dominated lacustrine sediment.