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 Gastrotricha Metschnikoff, 1864 - gastrotrichs
           Order Chaetonotida Remane, 1925
             Suborder Paucitubulatina d’Hondt, 1971
               Family Chaetonotidae Gosse, 1864
                 1 Genus Chaetonotus Ehrenberg, 1830
                 2 Genus Aspidiophorus Voigt, 1904
                 3 Genus Halichaetonotus Remane, 1936
                 4 Genus Heterolepidoderma Remane, 1927
                 5 Genus Ichthydium Ehrenberg, 1830
                 6 Genus Lepidodermella Blake, 1933
                 7 Genus Musellifer Hummon, 1969
                 7 Genus Musselifer see Genus Musellifer Hummon, 1969
                 8 Genus Polymerurus Remane, 1927