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 Macrodasyida Remane, 1925
             Family Thaumastodermatidae Remane, 1927
               Genus Ptychostomella Remane, 1926