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 Ctenophora Eschscholtz, 1829 - comb jellies
           Order Cydippida Gegenbaur, 1856
             Family Mertensiidae L. Agassiz, 1860
               Genus Mertensia Lesson, 1830
                 Mertensia ovum (Fabricius, 1780)