living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Tunicata Lamarck, 1816 - tunicates see Subphylum Urochordata Bateson, 1885
             Class Appendicularia Lahille, 1890 - appendicularians
               Family Oikopleuridae Lahille, 1887
                 1 Genus Oikopleura Mertens, 1830
                 2 Genus Bathocordaeus Lameere, 1941, orth. inval. see Genus Bathochordaeus Chun, 1900