Annelida Lamarck, 1809 - segmented worms
   Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
     Order Opisthopora
       Family Octochaetidae Michaelsen, 1900
         Genus [Eutyphoeus] Michaelsen, 1900
           01 Eutyphoeus coaltoni Michaelsen, 1907
           02 Eutyphoeus comillahnus Michaelsen, 1907
           03 Eutyphoeus gammiei (Beddard, 1888)
           04 Eutyphoeus gigas (Stephenson, 1917)
           05 Eutyphoeus incommodus (Beddard, 1901)
           06 Eutyphoeus masoni (Bourne, 1889)
           07 Eutyphoeus nicholsoni (Beddard, 1901)
           08 Eutyphoeus orientalis (Beddard, 1883)
           09 Eutyphoeus quadripapillatus Michaelsen, 1907
           10 Eutyphoeus scutarius Michaelsen, 1907