[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 Pilayellaceae
             1 Genus Bachelotia (E. Bornet) P. Kuckuck ex G. Hamel (1939)
             2 Genus Pilayella Bory (1823)