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 Subfamily Archechiniscinae Binda, 1978 see Family Archechiniscidae Binda, 1978