Kingdom Protoctista Hogg, 1860 Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844) Class Bacillariophyceae Haeckel (1878) - pennates Subclass Eunotiophycidae D.G.Mann (1990) see Subclass Bacillariophycidae D.G.Mann (1990) Order Eunotiales P.C.Silva (1962) Family Peroniaceae (Karsten) Topachevs'kyj & Oksiyuk (1960) Genus Peronia Bréb. & H.J. Arn. ex Kitton (1868)