On several stratigraphically important species of sporomorphs occurring in the Keuper of Poland

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Abstract
Seven species of sporomorphs are described occuring in large quantities in Keuper sediments of Western, Central and Southern Poland. Among these species three are new: Triadispora keuperiana, Triadispora undulata and Eucommiidites sulechoviensis; one species is a newly established combination of the species Todisporites cinctus (Mai.) nov. comb. The descriptions of the remaining three already given in foreign literature are supplemented by new observations made on the material investigated.