Phylum Tardigrada Doyère, 1840 - tardigrades
   Order Heterotardigrada Marcus, 1927 see Class Heterotardigrada Marcus, 1927
     Suborder Arthrotardigrada Marcus, 1927 see Order Arthrotardigrada Marcus, 1927
       Family Halechiniscidae Thulin, 1928
         1 Subfamily Archechiniscinae Binda, 1978 see Family Archechiniscidae Binda, 1978
         2 Subfamily Tanarctinae Renaud-Mornant, 1980
         3 Subfamily Florarctinae Renaud-Mornant, 1982
         4 Subfamily Halechiniscinae Thulin, 1928
         5 Subfamily Orzeliscinae Schulz, 1963
         6 Subfamily Styraconyxinae Kristensen & Renaud-Mornant, 1983
         7 Subfamily Euclavarctinae Renaud-Mornant, 1983