Kingdom Animalia Linnaeus, 1758 - animals Phylum Annelida Lamarck, 1809 - segmented worms Class Hirudinida 1 Subclass Acanthobdellida see Subclass Acanthobdellidea Livanow, 1905 2 Subclass Branchiobdellida see Subclass Branchiobdellidea 3 Subclass Hirudinea see Subclass Euhirudinea Lukin, 1956