[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
     Supergroup Chromalveolata Adl et al., 2005 - chromalveolates see Kingdom Chromista Caval.-Sm. (1981)
       Stramenopiles Patterson, 1990 - stramenopiles see Superphylum Heterokonta Caval.-Sm. (1986)
         Xanthophyceae P. Allorge ex Fritsch (1935) - yellow-green algae
           Tribonematales Pascher (1939)
             1 Genus Botrydium Wallr. (1815)
             2 Genus Bumilleriopsis H. Printz (1914)
             3 Genus Characiopsis A. Borzì (1895)
             4 Genus Chloromeson Pascher (1930)
             5 Genus Heterococcus R. Chodat (1907)
             6 Genus Ophiocytium Nägeli (1849), nom. cons.
             7 Genus Sphaerosorus A. Pascher (1937)
             8 Genus Tribonema Derbès & Solier (1851)
             9 Genus Xanthonema Silva (1979)