[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 Copepoda H. Milne-Edwards, 1840 - copepods
       Order Poecilostomatoida Thorell, 1859
         Family Xenocoelomidae nom. null. see Family Xenocoelomatidae Bresciani & Lützen, 1966
           1 Genus Aphanodomus C.B. Wilson, 1920
           2 Genus Xenocoeloma Caullery & Mesnil, 1915