[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)
         Phaeophyceae Hansgirg (1886) - brown algae
           Sphacelariales Migula (1908)
             1 Genus Chaetopteris Kützing (1843)
             2 Genus Halopteris F.T. Kützing (1843)
             3 Genus Onslowia R.B. Searles, in R.B. Searles & G.L. Leister (1980)
             4 Genus Sphacelaria H.C. Lyngbye (1819)
             5 Genus Stypocaulon F.T. Kützing (1843) see Genus Halopteris F.T. Kützing (1843)
             6 Genus Verosphacella nom. null. see Genus Verosphacela E.C. Henry (1987)