[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Tardigrada Doyère, 1840 - tardigrades
     Order Heterotardigrada Marcus, 1927 see Class Heterotardigrada Marcus, 1927
       1 Family Batillipedidae Ramazzotti, 1962
       2 Family Coronarctidae Renaud-Mornant, 1974
       3 Family Echiniscoididae Kristensen & Hallas, 1980
       4 Family Halechiniscidae Thulin, 1928
       5 Family Renaudarctidae Kristensen & Higgins, 1984
       6 Family Stygarctidae Schulz, 1951