Dinoflagellate cysts from Callovian of Łuków (Poland) – a re-examination
Abstract:More than 110 dinoflagellate cyst taxa have been found in the Callovian (Middle Jurassic) fossiliferous concretion and mudstone samples from Łuków, eastern Poland. Their assemblages are dominated by proximal species with apical archaeopyle (Lithodinia jurassica, Senstusidinium spp., Batiacasphaera spp., Escharisphaeridia spp.). The Łuków assemblage may be correlated with the Upper Callovian Wanaea thysanota Interval Biozone established in the British Isles. This is based on the co-occurrence of Trichodinium scarbourghense, Clathroctenocystis asaphes and Durotrigia filapicata. Diversity of the dinoflagellate cyst assemblage indicates optimal living conditions for dinoflagellates whereas dominance of land-derived phytoclasts and sporomorphs suggests a nearshore sedimentary setting. Presence of some endemic Boreal species, Ctenidodinium thulium and Valvaeodinium groenlandicum, points to influences from northern areas.
Document Type: Research Article
Publication date: 2008-02-01
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