Our data for the first time provide analyzed and summarized information about the presence of pollen grains of Taxus baccata L. in the palynological materials of the Riss-Würm deposits from the sections of the plain part of Ukraine. Taxus baccata took part in formation of the vegetation cover of Prykarpattia and Podolian Upland in the optimum of this interglacial. The total list of the woody collective fossil flora of the Riss-Würm optimum phases (30 genera, 38 species) was identified. Indicative (Taxus baccata, Ilex aquifolium, Juglans regia, Corylus colurna) and typical (Viscum album, Hedera helix, Corylus avellana, Humulus lupulus, Tilia cordata, T. plathyphyllos, T. tomentosa, Carpinus betulus, Quercus petraea, Q. pubescens, Cornus mas) species of the woody flora were determined for optimum phases of Riss-Würm interglacial for the western part of Ukraine. On the example of Taxus baccata, we provide results of chorological and paleochorological research which revealed that the mentioned species was distributed over a larger area to the east, as compared to its modern range (to Zbarazh, 49°40′N, 25°46′E), during the optimal phases of the interglacial.
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