Kingdom Protoctista Hogg, 1860
   Phylum Bacillariophyta Engl. & Gilg (1919) - diatoms see [unranked] Diatomea Kütz. (1844)
     Class Fragilariophyceae Round (1990) - araphid, pennate diatoms see Class Bacillariophyceae Haeckel (1878)
       Subclass Fragilariophycidae Round (1990) - core araphid diatoms
         Order Plagiogrammales Round & R.M. Crawford (1990) see Order Plagiogrammales Gogorev & Stepanova (2015)
           Family Plagiogrammaceae De Toni (1890)
             1 Genus Plagiogramma Grev. (1859)
             2 Genus Dimerogramma see Genus Dimeregramma Ralfs (1861)
             3 Genus Glyphodesmis Grev. (1862)