Phylum Tardigrada Doyère, 1840 - tardigrades Class Eutardigrada Richters, 1926 - naked tardigrades Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980 Family Microhypsibiidae Pilato, 1998 1 Genus Microhypsibius Thulin, 1928 2 Genus Fractonotus Pilato, 1998