[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Crustacea (Brünnich, 1772) - crustaceans see Superclass Crustacea Pennant, 1777
     Order Tanaidacea Dana, 1849 - tanaids
       Suborder Tanaidomorpha Sieg, 1980
         Family Anarthruridae Lang, 1971
           Subfamily Leptognathiinae Sieg, 1973 see Family Leptognathiidae Sieg, 1976
             1 Genus Exspina Lang, 1968
             3 Genus Mirandotanais Kussakin & Tzareva, 1974
             4 Genus Nematotanais Bird & Holdich, 1985
             5 Genus Pseudoparatanais Lang, 1973
             6 Genus Tanaopsis G.O. Sars, 1896