[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Class Bacillariophyceae Haeckel (1878) - pennates
       Subclass Bacillariophycidae D.G.Mann (1990) - raphid diatoms
         Order Bacillariales Hendey (1937)
           Family Bacillariaceae Ehrenb. (1831)
             Genus Nitzschia Hassall (1845)
               1 Nitzschia longissima (Bréb., in Kützing) Ralfs, in Pritchard
               2 Nitzschia lorenziana Grunow, in Cleve & Grunow (1880)
               3 Nitzschia panduformis Gregory
               4 Nitzschia sicula (Castracane) Hustedt
               5 Nitzschia sigma (Kützing) W.Sm. (1853)