Nine new nomenclature and taxonomic combinations are proposed in the genus Neoceratium Gomez et al., and one – in the genus Kryptoperidinium Lindemann. Necessity of introducing new combinations is caused by division of the genus Ceratium Schrank into 2 genera: Ceratium (freshwater species with 6 singular plates) and Neoceratium (marine species with five plates), and also further "disbanding" of the genus Glenodinium Ehrenb. (its existence is questionable because of the fuzzy taxonomic features).

Keywords: new nomenclature and taxonomical combinations, Dinophyta, Neoceratium, Kryptoperidinium, Black Sea

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