Phylum Tardigrada Doyère, 1840 - tardigrades
   Order Eutardigrada Richters, 1926 see Class Eutardigrada Richters, 1926
     Suborder Apochela Schuster, Nelson, Grigarick & Christenberry, 1980 see Order Apochela Schuster, Nelson, Grigarick & Christenberry, 1980
       Family Milnesiidae Ramazzotti, 1962