Abstract
A study of the Upper Miocene deposits on the Taman Peninsula revealed a new centric diatom Thalassiosira kozyrenkoae Kovaleva et Gogorev. The absence of findings of this species in the modern diatom flora suggests that it is extinct. The species was likely endemic for the Sea of Azov – the Black Sea basin. Single findings of valve fragments in the New Azov layers make it possible to use T. kozyrenkoae as a stratigraphic marker and to estimate the distribution extent of the Neogene sediments from the outcrops. This study will contribute to the more precise identification of the origin of the redeposited fossil diatoms in the Quaternary sediments from the Sea of Azov.
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