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 Oligobdella biannulata (Moore, 1900) see Placobdella biannulata (Moore, 1900)