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 Rhabdonematales Round & R.M. Crawford (1990)
           Family Rhabdonemataceae Round & R.M. Crawford (1990)
             1 Genus Rhabdonema Kütz. (1844)
             2 Genus Striatella C.Agardh (1832)
             3 Genus Tessella Ehrenb. (1836)
             4 Genus Grammatophora Ehrenb. (1840)
             5 Genus Cyclophora Castrac. (1878)