organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom [Animalia] Linnaeus, 1758 - animals
     †Enigmatic animals Andrews, 1970
       Genus †Eldonia Walcott, 1911
         1 †Eldonia eumorpha (Sun & Hou, 1987)