[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 Ectocarpales Bessey (1907)
           Family Ectocarpaceae C.Agardh (1828)
             Genus Feldmannia G. Hamel (1939)
               1 Feldmannia battersiides (Ercegovic) Cormaci & G. Furnari
               2 Feldmannia irregularis (Kützing) G. Hamel (1939)
               3 Feldmannia kjellmanii Kylin (1947)
               4 Feldmannia lebelii (Aresch. ex P.L. Crouan & H.M. Crouan) G. Hamel (1939)
               5 Feldmannia padinae (Buffham) G. Hamel (1939)
               6 Feldmannia paradoxa (Mont.) G. Hamel (1931)
               7 Feldmannia paradoxoides (Ercegovic) Cormaci & G. Furnari
               8 Feldmannia simplex (P.L. Crouan & H.M. Crouan) G. Hamel (1939)