[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Annelida Lamarck, 1809 - segmented worms
     Class Polychaeta Grube, 1850 - polychaetes
       Family Opheliidae Malmgren, 1867
         1 Genus Ammotrypanella McIntosh, 1878
         2 Genus Armandia de Filippi, 1862
         3 Genus Euzonus Grube, 1866
         4 Genus Kesun Chamberlin, 1919 see Genus Travisia Johnston, 1840
         5 Genus Ophelia Savigny, 1818
         6 Genus Ophelina Ørsted, 1843
         7 Genus Polyophthalmus de Quatrefages, 1850
         8 Genus Tachytrypane McIntosh, 1876
         9 Genus Travisia Johnston, 1840