[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Algae L. (1753) see [unranked] Algae
     Phylum Phaeophycota see Class Phaeophyceae Hansgirg (1886)
       Class Phaeophyceae Hansgirg (1886) - brown algae
         Order Sphacelariales Migula (1908)
           Family Sphacelariaceae Decaisne (1842)
             Genus Sphacelaria H.C. Lyngbye (1819)
               01 Sphacelaria arctica Harvey (1858) see Battersia arctica (Harvey) S.G.A. Draisma et al. (2010)
               02 Sphacelaria brachygonia Mont. (1843)
               03 Sphacelaria caespitula Lyngbye (1819) see Sphaceloderma caespitula (Lyngbye, 1819) S.G.A. Draisma et al. (2010)
               04 Sphacelaria cirrosa (Roth) C.Agardh (1824)
               05 Sphacelaria fusca (Huds.) Gray (1821)
               06 Sphacelaria mirabilis (Reinke ex Batters) Prud'homme van Reine (1982)
               07 Sphacelaria nana Nägeli ex Kützing (1855) see Sphacelorbus nanus (Nägeli ex Kützing) S.G.A. Draisma et al. (2010)
               08 Sphacelaria plumigera Holmes ex Hauck (1884) see Battersia plumigera (Holmes ex Hauck) S.G.A. Draisma et al. (2010)
               09 Sphacelaria plumosa Lyngbye (1819) see Chaetopteris plumosa (Lyngbye) Kützing
               10 Sphacelaria plumula Zanardini (1865)
               11 Sphacelaria racemosa Grev. (1824) see Battersia racemosa (Grev.) S.G.A. Draisma et al. (2010)
               12 Sphacelaria radicans (Dillwyn, 1809) C.Agardh (1824) see Protohalopteris radicans (Dillwyn, 1809) S.G.A. Draisma et al. (2010)
               13 Sphacelaria reticulata Lyngbye (1818)
               14 Sphacelaria rigidula Kütz. (1843)
               15 Sphacelaria solitaria Kylin (1947)
               16 Sphacelaria tribuloides Meneghini (1840)