O stratygraficznym rozprzestrzenieniu miliolidów środkowo-jurajskich w Polsce

Abstract

On the stratigraphic distribution of miliolidae in the Middle Jurassic of PolandA report is here made on the stratigraphic distribution and reciprocal quantitative relations of Miliolidae studied in a number of Middle Jurassic profiles, chiefly in the vicinity of Częstochowa, Rawa Mazowiecka and Łęczyca. The presence of these forms in other regions of Poland is ascertained. Their facial and stratigraphic significance is discussed. Two new species of genus Miliolina are described.