Eutardigrada Richters, 1926 - naked tardigrades
   Order Parachela Schuster, Nelson, Grigarick & Christenberry, 1980
     Family Hypsibiidae Pilato, 1969
       1 Genus Thulinius R. Bertolani, 2003
       1.0 Genus Thulinia Bertolani, 1981, nom. illeg. see Genus Thulinius R. Bertolani, 2003
       2 Genus Pseudobiotus Nelson, in Schuster et al., 1980
       3 Genus Isohypsibius Thulin, 1928