Eutardigrada Richters, 1926 - naked tardigrades
   Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980
     1 Family Hypsibiidae Pilato, 1969
     2 Family Macrobiotidae Thulin, 1928
     3 Family Eohypsibiidae Bertolani & Kristensen, 1987