Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919) Class Bacillariophyceae Haeckel (1878) - pennates Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms Order Lyrellales D.G.Mann (1990) Family Lyrellaceae D.G.Mann (1990) Genus Lyrellaᵀ Karaeva (1978) Lyrella lyra (Ehrenb.) Karajeva (1978)