[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 Fucales Kylin
           Family Cystoseiraceae De Toni (1891)
             Genus Cystoseira C.Agardh (1820), nom. cons.
               01 Cystoseira abies-marina (S.G.Gmel.) C.Agardh
               02 Cystoseira algeriensis Feldmann
               03 Cystoseira amentacea Bory
               04 Cystoseira baccata (S.G.Gmel.) P.C.Silva (1952)
               05 Cystoseira barbata (Stackhouse) C.Agardh (1842)
               06 Cystoseira barbatula Kützing
               07 Cystoseira brachycarpa J.Agardh
               08 Cystoseira compressa (Esper) Gerloff & Nizamuddin (1975)
               09 Cystoseira concatenata (L.) C.Agardh
               10 Cystoseira corniculata (Turner) Zanardini (1841)
               11 Cystoseira crinita Duby
               12 Cystoseira crinitophylla Ercegovic
               13 Cystoseira dubia Valiante
               14 Cystoseira elegans Sauvageau
               15 Cystoseira foeniculacea (L.) Grev. (1830)
               16 Cystoseira gibraltarica (Sauvageau) P.J.L. Dangeard (1949)
               17 Cystoseira humilis Schousboe ex Kützing (1860)
               18 Cystoseira hyblaea Giaccone
               19 Cystoseira jabukae Ercegovic
               20 Cystoseira mauritanica Sauvageau
               21 Cystoseira mediterranea Sauvageau (1912)
               22 Cystoseira montagnei J.Agardh
               23 Cystoseira nodicaulis (Withering) M. Roberts (1967)
               24 Cystoseira pelagosae Ercegovic
               25 Cystoseira planiramea Schiffner
               26 Cystoseira platyclada Sauvageau (1912)
               27 Cystoseira sauvageauana G. Hamel (1939)
               28 Cystoseira schiffneri G. Hamel (1939)
               29 Cystoseira sedoides (Desf.) C.Agardh (1820)
               30 Cystoseira spinosa Sauvageau (1912)
               31 Cystoseira squarrosa De Not.
               32 Cystoseira susanensis Nizamuddin (1985)
               33 Cystoseira tamariscifolia (Huds.) Papenfuss (1950)
               34 Cystoseira usneoides (L.) M. Roberts (1968)
               35 Cystoseira wildprettii Nizamuddin (1995)
               36 Cystoseira zosteroides C.Agardh