[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Branch Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Division Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Subdivision Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
           Section Eucoelomata see Superphylum Eucoelomata
             Phylum Annelida Lamarck, 1809 - segmented worms
               Class Hirudinea Lamarck, 1818 - leeches see Subclass Hirudinida
                 Order Gnathobdellida
                   Genus Haemadipsa Tennent, 1861
                   Genus Haemopis Savigny, 1820
                   Genus Herpobdella Agassiz, 1846 see Genus Erpobdella Lamarck, 1818
                   Genus Hirudo Linnaeus, 1758
                   Genus Macrobdella Verrill, 1872