[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 Ectocarpus Lyngbye (1819), nom. cons.
               01 Ectocarpus borealis (Kjellman) Kjellman (1890)
               02 Ectocarpus caspicus Henckel
               03 Ectocarpus fasciculatus Harvey (1841)
               04 Ectocarpus flagelliformis Kützing (1843)
               05 Ectocarpus fulvescens Schousboe ex Thuret
               06 Ectocarpus parvulus Kützing (1849)
               07 Ectocarpus parvus (Saunders) Hollenberg (1971)
               08 Ectocarpus rufulus Kützing (1843)
               09 Ectocarpus siliculosus (Dillwyn) Lyngbye (1819)
               10 Ectocarpus simpliusculus C.Agardh (1827)
               11 Ectocarpus tomentosoides Farlow see Laminariocolax tomentosoides (Farlow) Kylin (1947)
               12 Ectocarpus variabilis Vickers (1905)
               13 Ectocarpus virescens Thuret ex Sauvageau