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Famennian Stromatoporoidea from the Quasiendothyra communis Foraminiferal Zone and slightly younger strata from the Dębnik anticline, southern Poland, form a succession of three consecutive assemblages. Assemblages 1 and 3 consist of representatives of the order Clathrodictyida, while assemblage 2 is dominated by the order Labechiida. The clathrodictyids are represented by the genus Gerronostroma,...
Four species of belemnoids, one new: Belemnopsis wiekensis n. sp . from the Middle Jurassic and from lower horizons of the Upper Jurassic of Poland, belonging to the subfamily Belemnopsinae Naef, 1922, are described together with observations on the ontogeny, variability and structure of rostra.
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