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Classification based largely on Sawyer, 1988 but in part on findings of Siddall and Burreson, 1995 with respect to relative monophyly.
Class Hirudinea Lamarck, 1818
Subclass Branchiobdellidea
Order Branchiobdellida
Branchiobdellidae
Branchiobdella Odier, 1823
Subclass Acanthobdellidea Livanow, 1905
Order Acanthobdellidea
Acanthobdellidae
Acanthobdella Grube, 1851
A. peledina Grube, 1851
A. livanowi Epshtein, 1966
Subclass Euhirudinea Lukin, 1956
Order Rhynchobdellida Blanchard, 1894
Ozobranchidae Pinto, 1921
"Piscicolidae" Johnston, 1865
Pontobdellinae Caballero, 1956
Piscicolinae Llewellyn, 1966
Platybdellinae Epshtein, 1970
Glossiphoniidae
Theromyzinae Sawyer, 1986
Glossiphoniinae Johnson, 1816
Haementeriinae Autrum, 1939
Order Arynchobdellida Blanchard, 1894
Americobdellidae
* this family previously placed with hirudinids *
Suborder Erpobdelliformes
Erpobdellidae Blanchard, 1894
"Salifidae" Johansson, 1910 paraphyletic
"Cylicobdellidae" Sawyer, 1986 paraphyletic
* this family traditionally placed with hirudinids *
"Cylicobdellinae" Ringuelet, 1972 paraphyletic
Gastromobdellinae Richardson, 1971
Suborder Hirudiniformes Cabellero, 1952
Hirudinidae
Hirudininae (Richardson, 1969)
Haemopinae (Richardson, 1969)
Semiscolecinae (Scriban and Autrum, 1934)
Hirudinarinae Sawyer, 1986
Macrobdellinae (Richardson, 1969)
Richardsonianinae (Richardson, 1969)
Ornithobdellinae (Richardson, 1969)
Haemadispsidae Blanchard, 1893
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