organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Pseudocoelomata see [unranked] Pseudocoelomates Hyman, 1951
           Phylum Nematoda Gegenbaur, 1859 - round worms
             Genus Trichinella Railliet, 1895
               Trichinella spiralis (Owen, 1835)