[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 Arabellidae Hartman, 1944 see Family Oenonidae Kinberg, 1865
         1 Genus Arabella Grube, 1850
         2 Genus Drilonereis Claparède, 1870
         3 Genus Haematocleptes Wirén, 1886
         4 Genus Labrorostratus Saint-Joseph, 1888
         5 Genus Notocirrus Schmarda, 1861
         6 Genus Oligognathus Spengel, 1881