URMO Taxon list
Abranchus Johansson, 1896 accepted as Oceanobdella Caballero, 1956
Abranchus blenni Knight-Jones, 1940 accepted as Oceanobdella blennii (Knight-Jones, 1940)
Abranchus brunneus Johansson, 1896 accepted as Heptacyclus brunneus (Johansson, 1896)
Abranchus microstomus Johansson, 1896 accepted as Oceanobdella microstoma (Johansson, 1896)
Acanthobonellia Fisher, 1948
Acanthobonellia miyajimai (Ikeda, 1904)
Acanthobonellia pirotanensis Jose, 1964
Acanthobonellia rollandoe Menon, DattaGupta & Johnson, 1964
Acanthohamingia Ikeda, 1910
Acanthohamingia ijimai (Ikeda, 1908)
Acanthohamingia paradola Fisher, 1946 accepted as Amalosoma paradolum (Fisher, 1946)
Acanthohamingia paradolum Fisher, 1946 accepted as Acanthohamingia paradola Fisher, 1946 accepted as Amalosoma paradolum (Fisher, 1946)
Acanthohamingia shiplei Ikeda, 1910
Achaetobonellia Fisher, 1953
Achaetobonellia maculata Fisher, 1953
Achaetobonellia ricei Biseswar, 2005
Aciculata accepted as Errantia
Aestabdella Burreson, 1976 accepted as Pterobdella Kaburaki, 1921
Aestabdella leiostomi Burreson & Thoney, 1991 accepted as Pterobdella leiostomi (Burreson & Thoney, 1991)
Alaysia Southward, 1991
Alaysia spiralis Southward, 1991
Alomasoma Zenkevitch, 1958
Alomasoma belyaevi Zenkevitch, 1964
Alomasoma chaetiferum Zenkevitch, 1958
Alomasoma eddystonense accepted as Amalosoma eddystonense Stephen, 1956
Alomasoma lanai Ditadi, 1992 accepted as Alomasoma belyaevi Zenkevitch, 1964
Alomasoma nordpacificum Zenkevitch, 1958
Alomasoma paradolum accepted as Amalosoma paradolum (Fisher, 1946)
Alomasoma rhynchollulus DattaGupta, 1981
Amalosoma Fisher, 1948
Amalosoma eddystonense Stephen, 1956
Amalosoma paradolum (Fisher, 1946)
Anelassorhynchus Annandale, 1922
Anelassorhynchus abyssalis Fisher, 1949
Anelassorhynchus adelaidensis Edmonds, 1960
Anelassorhynchus branchiorhynchus (Annandale & Kemp, 1915)
Anelassorhynchus chaetiferus DattaGupta, Menon & Johnson, 1963
Anelassorhynchus dendrorhynchus (Annandale & Kemp, 1915)
Anelassorhynchus fisheri DattaGupta, 1974
Anelassorhynchus gangae Biseswar, 1984 accepted as Anelassorhynchus porcellus Fisher, 1948
Anelassorhynchus inansensis (Ikeda, 1904)
Anelassorhynchus indivisus (Sluiter, 1900)
Anelassorhynchus loborhynchus DattaGupta & Menon, 1966
Anelassorhynchus microrhynchus (Prashad, 1919)
Anelassorhynchus moebii (Greeff, 1879)
Anelassorhynchus mucosus (Ikeda, 1904)
Anelassorhynchus porcellus Fisher, 1948
Anelassorhynchus porcellus adelaidensis Edmonds, 1960 represented as Anelassorhynchus adelaidensis Edmonds, 1960
Anelassorhynchus sabinus (Lanchester, 1905)
Anelassorhynchus semoni (Fischer, 1896)
Anelassorhynchus vegrandis (Lampert, 1883)
Antarcticobdella
Antarcticobdella crozetensis Sawyer, 1972
Antillesoma Stephen & Edmonds, 1972
Antillesoma antillarum (Grube, 1858)
Antillesomatidae Kawauchi, Sharma & Giribet, 2012
Apionsoma Sluiter, 1902
Apionsoma (Apionsoma) Sluiter, 1902
Apionsoma (Apionsoma) misakianum (Ikeda, 1904)
Apionsoma (Apionsoma) murinae (Cutler, 1969)
Apionsoma (Apionsoma) trichocephalus Sluiter, 1902
Apionsoma (Edmondsius) Gibbs & Cutler, 1987
Apionsoma (Edmondsius) pectinatum (Keferstein, 1867)
Apionsoma capitata (Gerould, 1913) accepted as Phascolosoma (Fisherana) capitatum (Gerould, 1913)
Archibonellia Fischer, 1919
Archibonellia michaelseni Fischer, 1919
Archibonellia mjoebergi Fischer, 1921 accepted as Pseudobonellia biuterina Johnston & Tiegs, 1919
Arcovestia Southward & Galkin, 1997
Arcovestia ivanovi Southward & Galkin, 1997
Arctobdella de Silva & Kabata, 1961 accepted as Hemibdella van Beneden & Hesse, 1863. Revised
Arctobdella branchiarum de Silva & Kabata, 1961 accepted as Hemibdella branchiarum (de Silva & Kabata, 1961)
Arhynchite Satô, 1937
Arhynchite arhynchite (Ikeda, 1924)
Arhynchite californicus Fisher, 1949
Arhynchite hiscocki Edmonds, 1960
Arhynchite inamoenus Fisher, 1946
Arhynchite paulensis Amor, 1971
Arhynchite pugettensis Fisher, 1949
Arhynchite rugosus Chen & Yeh, 1958
Arhynchobdellida
Aspidosiphon Diesing, 1851
Aspidosiphon (Akrikos) Cutler & Cutler, 1989
Aspidosiphon (Akrikos) albus Murina, 1967
Aspidosiphon (Akrikos) mexicanus (Murina, 1967)
Aspidosiphon (Akrikos) thomassini Cutler & Cutler, 1979
Aspidosiphon (Akrikos) venabulum Selenka & Bülow, 1883
Aspidosiphon (Akrikos) zinni Cutler, 1969
Aspidosiphon (Aspidosiphon) Diesing, 1851
Aspidosiphon (Aspidosiphon) elegans (Chamisso & Eysenhardt, 1821)
Aspidosiphon (Aspidosiphon) exiguus Edmonds, 1974
Aspidosiphon (Aspidosiphon) gosnoldi Cutler, 1981
Aspidosiphon (Aspidosiphon) gracilis (Baird, 1868) represented as Aspidosiphon (Aspidosiphon) gracilis gracilis (Baird, 1868)
Aspidosiphon (Aspidosiphon) gracilis gracilis (Baird, 1868)
Aspidosiphon (Aspidosiphon) misakiensis Ikeda, 1904
Aspidosiphon (Aspidosiphon) muelleri Diesing, 1851 represented as Aspidosiphon (Aspidosiphon) muelleri muelleri Diesing, 1851
Aspidosiphon (Aspidosiphon) muelleri muelleri Diesing, 1851
Aspidosiphon (Aspidosiphon) spiralis Sluiter, 1902
Aspidosiphon (Paraspidosiphon) Stephen, 1965
Aspidosiphon (Paraspidosiphon) coyi Quatrefages, 1866
Aspidosiphon (Paraspidosiphon) fischeri ten Broeke, 1925