Phylum Tardigrada Doyère, 1840 - tardigrades Class Heterotardigrada Marcus, 1927 - armored tardigrades Order Echiniscoidea Richters, 1926 Family Echiniscidae Thulin, 1928 Genus Testechiniscus Kristensen, 1987 1 Testechiniscus spitsbergensis (Scourfield, 1897)