[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 Chordariales
           Family Leathesiaceae
             Genus Leathesia Gray (1821)
               1 Leathesia difformis (L.) J.E. Areschoug (1847)
               2 Leathesia mucosa Feldmann (1937)
               3 Leathesia verruculiformis Y.P. Lee & I.K. Lee (1988)