Phylum Tardigrada Doyère, 1840 - tardigrades Class Eutardigrada Richters, 1926 - naked tardigrades Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980 Family Calohypsibiidae Pilato, 1969 Genus Calohypsibius Thulin, 1928 Calohypsibius ornatus (Richters, 1900)