Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Tardigrada Doyère, 1840 - tardigrades
     Class Heterotardigrada Marcus, 1927 - armored tardigrades
       Order Echiniscoidea Richters, 1926
         1 Family Echiniscoididae Kristensen & Hallas, 1980
         2 Family Carphaniidae Binda & Kristensen, 1986
         3 Family Oreellidae Ramazzotti, 1962
         4 Family Echiniscidae Thulin, 1928