[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)
             Genus Synedra Ehrenb. (1830)
               1 Synedra fulgens (Grev.) W.Sm. (1853) see Ardissonea fulgens (Grev.) Grunow, in Cleve & Grunow (1880)
               2 Synedra hennedyana Gregory
               3 Synedra tabulata (C.Agardh) Kützing (1844) see Fragilaria fasciculata (C.Agardh) Lange-Bertalot
               4 Synedra ulna (Nitzsch) Ehrenberg (1836) see Fragilaria ulna (Nitzsch) Lang.-Bert.
               5 Synedra undulata (J.W. Bailey) Gregory