Annelida Lamarck, 1809 - segmented worms Class Hirudinea Lamarck, 1818 - leeches see Subclass Hirudinida Order Arhynchobdellida Blanchard, 1894 Family Glossiphoniidae Vaillant, 1890 1 Genus Glossiphonia Johnson, 1817 2 Genus Helobdella Blanchard, 1896 3 Genus Placobdella Blanchard, 1893