Phylum Tardigrada Doyère, 1840 - tardigrades
   Order Eutardigrada Richters, 1926 see Class Eutardigrada Richters, 1926
     Suborder Parachela Schuster, Nelson, Grigarick & Christenberry, 1980 see Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980
       1 Family Macrobiotidae Thulin, 1928
       2 Family Hypsibiidae Pilato, 1969