Phylum Annelida Lamarck, 1809 - segmented worms
   Class Polychaeta Grube, 1850 - polychaetes
     Order Amphinomida Lamarck, 1818
       Family Euphrosinidae Williams, 1851
         Genus Euphrosine Savigny, 1818
           1 Euphrosine armadillo M. Sars, 1851
           2 Euphrosine borealis Oersted, 1843