Phylum Tardigrada Doyère, 1840 - tardigrades
   Class Eutardigrada Richters, 1926 - naked tardigrades
     Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980
       Family Hypsibiidae Pilato, 1969
         Genus Isohypsibius Thulin, 1928
           1 Isohypsibius altai L. Kaczmarek & L. Michalczyk, 2006
           2 Isohypsibius macrodactylus (Maucci, 1978)
           3 Isohypsibius irregibilis Biserov
           4 Isohypsibius archangajensis L. Kaczmarek & L. Michalczyk, 2004
           5 Isohypsibius mihelcici (Iharos)
           6 Isohypsibius nodosus (Murray, 1907)
           7 Isohypsibius sattleri (Richters, 1902)
           8 Isohypsibius schaudinni (Richters, 1909)
           9 Isohypsibius tuberculatus (Plate, 1888)