[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 Fragilariophyceae Round (1990) - araphid, pennate diatoms see Class Bacillariophyceae Haeckel (1878)
       Subclass Fragilariophycidae Round (1990) - core araphid diatoms
         Order Fragilariales P.C.Silva (1962)
           Family Fragilariaceae Grev. (1833)
             1 Genus Fragilaria Lyngb. (1819)
             2 Genus Asterionella Hassall (1850)
             3 Genus Asterionellopsis Round (1990)
             4 Genus Climacosphenia Ehrenb. (1843)
             5 Genus Diatoma Bory (1824)
             6 Genus Hannea R. Patrick, in R. Patrick & C.W. Reimer (1966) see Genus Hannaea R.M. Patrick (1966)
             7 Genus Synedra Ehrenb. (1830)
             8 Genus Podocystis Bailey (1854)