The calculations were made and data were synthesized on the distribution and opportunity of the use of the high rank Polycystina taxa for paleoecological reconstructions. Available data on the Polycystina distribution in the recent deposits, cores and drilling materials of the Greenland-Iceland-Norwegian seas, Norwegian fjords, Okhotsk sea, Japan sea, Pacific, Atlantic, Arctic and Atlantic-Indian ocean area of Antarctic were studied and summarized. Obtained data on the quantitative distribution of orders, suborders and families, their ratios (in both an abundance and number of species) allow to suppose, that the high rank taxa specific communities correspond to various geographic areas of the ocean or semiclosed marine basins. Available data on the structure of Polycystina communities confirm our earlier conclusions that the most typical feature of the semiclosed basins and neritic areas is a low diversity, high variability and a high degree of domination of single species or high rank taxa. Quantitative reflaction of this relationship most likely is defined by the temperature factor. Our research has shown, that sharp changes in time of the structure of communities are indicative of the changes in character of a hydrodynamical mode of a basin, caused by climatic and/or tectonic events. Our research has shown that the taxonomical composition of fauna is a sign much more stable than data on quantitative ratios (not in a number of species, but in abundance) between supraspecific rank taxa of different level, i.e. the structure of communities most fully reflects changes in environmental conditions. It means that quantitative data on supraspecific rank taxa can be used for indication of paleoenvironment and typifications of bionomical conditions. The obtained quantitative data on Polycystina family communities in deposits of site IODP306-1314 showed, that within 1500 th.y (51 isotop..oxig stages) communities sharply changed on structure tens times reflecting climatic fluctuations-glaciations and interglaciations.