Class Hirudinea Lamarck, 1818 - leeches see Subclass Hirudinida Subclass Euhirudinea Lukin, 1956 - true leeches see Subclass Hirudinida Order Rhynchobdellida Blanchard, 1894 Family Glossiphoniidae Vaillant, 1890 Subfamily Haementeriinae Autrum, 1939 Genus Oligobdella Moore, 1918 see Genus Placobdella Blanchard, 1893 1 Oligobdella biannulata (Moore, 1900) see Placobdella biannulata (Moore, 1900)