[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 Ergasilidae von Nordmann, 1832
           1 Genus Ergasilus von Nordmann, 1832
           2 Genus Neoergasilus Yin, 1956
           3 Genus Nipergasilus Yamaguti, 1939
           4 Genus Paraergasilus Markewitsch, 1937
           5 Genus Thersitina Norman, 1905