Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Tardigrada Doyère, 1840 - tardigrades
     Class Eutardigrada Richters, 1926 - naked tardigrades
       Order Apochela Schuster, Nelson, Grigarick & Christenberry, 1980 [monotypic]
         1 Family Milnesiidae Ramazzotti, 1962