Noteworthy records of diatoms and a new species Fragilaria strelnikovae in waterbodies and water courses of the Yamal Peninsula (Russia)

Some new to the fl ora of the Yaman Peninsula centric diatoms (Cyclotella meduanae, C. schumannii, Pliocaenicus costatus, Thalassiosira incerta) and the pennate Fragilaria famelica are recorded from waterbodies and water courses in the Far North of Western Siberia. The fi ndings of these species beyond the Polar Circle clarify data on their habitats and ecology. The new species Fragilaria strelnikovae Genkal et Yarushina sp. nov. is described from the Naduiyakha River basin. It is similar to F. construens var. triundulata and F. brevistriata var. trigibba, but differs from them in number of striae in 10 μm and the shape of the central area.

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