[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
     Subclass Tantulocarida Boxshall & Lincoln, 1983 - tantulocarids
       Family Onceroxenidae Huys, 1991
         Genus Onceroxenus Boxhall & Lincoln, 1987