[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
       Family Halechiniscidae Thulin, 1928
         Genus Tanarctus Renaud-Debyser, 1959
           1 Tanarctus gracilis Renaud-Mornant, 1980
           2 Tanarctus longisetosus Grimaldi de Zio et al., 1982
           3 Tanarctus ramazzotti Renaud-Mornant, 1975
           4 Tanarctus tauricus Renaud-Debyser, 1959