The thorny-headed worm family Polymorphidae contains endoparasites which as adults feed mainly in fish and aquatic birds. When this taxon was erected by Meyer in 1931, a subfamily Polymorphidae was established in it. As the Polymorphidae as presently understood would then be monotypic, with no basal genera outside the Polymorphinae, the proposed subfamily is redundant for the time being and therefore most modern treatments simply omit it.
Polymorphus minutus is an economically significant parasite in goose and duck farming.
Andracantha
Contains the following species:
Andracantha gravida (Alegret, 1941)Andracantha mergi (Lundstroem, 1941)Andracantha phalacrocoracis (Yamaguti, 1939)Contains the following species:
Arhythmorhynchus brevis Van Cleave, 1916Arhythmorhynchus capellae (Yamaguti, 1935)Arhythmorhynchus comptus Van Cleave and Rausch, 1950Arhythmorhynchus distinctus Baer, 1956Arhythmorhynchus eroliae (Yamaguti, 1939)Arhythmorhynchus frassoni (Molin, 1858)Arhythmorhynchus frontospinosus (Tubangui, 1935)Arhythmorhynchus jeffreyi Schmidt, 1973Arhythmorhynchus johnstoni Golvan, 1960Arhythmorhynchus limosae Edmonds, 1971Arhythmorhynchus longicollis (Villot, 1875)Arhythmorhynchus petrochenkoi (Schmidt, 1969)Arhythmorhynchus plicatus (Linstow, 1883)Arhythmorhynchus pumiliorostris Van Cleave, 1916Arhythmorhynchus siluricola Dollfus, 1929Arhythmorhynchus teres Van Cleave, 1920Arhythmorhynchus tigrinus Moghe and Das, 1953Arhythmorhynchus trichocephalus (Leuckart, 1876)Arhythmorhynchus tringi Gubanov, 1952Arhythmorhynchus uncinatus (Kaiser, 1893)Arhythmorhynchus xeni Atrashkevich, 1978Contains the following species:
Bolbosoma balaenae (Gmelin, 1790)Bolbosoma bobrovoi Krotov and Delamure, 1952Bolbosoma brevicolle (Malm, 1867)Bolbosoma caenoforme (Heitz, 1920)Bolbosoma capitatum (Linstow, 1880)Bolbosoma hamiltoni Baylis, 1929Bolbosoma heteracanthis (Heitz, 1917)Bolbosoma nipponicum Yamaguti, 1939Bolbosoma physeteris Gubanov, 1952Bolbosoma scomberomori Wang, 1980Bolbosoma thunni Harada, 1935Bolbosoma tuberculata Skrjabin, 1970Bolbosoma turbinella (Diesing, 1851)Bolbosoma vasculosum (Rudolphi, 1819)Contains the following species:
Corynosoma alaskensis Golvan, 1958Corynosoma anatarium Van Cleave, 1945Corynosoma australe Johnston, 1937Corynosoma bullosum (Linstow, 1892)Corynosoma cameroni Van Cleave, 1953Corynosoma capsicum Golvan and Mokhayer, 1973Corynosoma clavatum Goss, 1941Corynosoma clementi Giovannoni and Fernandes, 1965Corynosoma constrictum Van Cleave, 1918Corynosoma curiliensis Gubanov, 1942Corynosoma enhydri Morozov, 1940Corynosoma enrietti Molfie and Fretas, 1953Corynosoma falcatum Van Cleave, 1953Corynosoma hadweni Van Cleave, 1953Corynosoma hamanni (Linstow, 1892)Corynosoma kurilensis Gubanov, 1952Corynosoma longilemniscatus Machado, 1961Corynosoma macrosomum Neiland, 1962Corynosoma magdaleni Montreuil, 1958Corynosoma mandarinca Oschmarin, 1963Corynosoma mirabilis Skrjabin, 1966Corynosoma obtuscens Lincicome, 1943Corynosoma otariae Morini and Boero, 1961Corynosoma pacifica Nikolskii, 1974Corynosoma peposacae (Porta, 1914)Corynosoma pyriforme (Bremser, 1824)Corynosoma rauschi Golvan, 1958Corynosoma reductum (Linstow, 1905)Corynosoma semerme (Forssell, 1904)Corynosoma septentrionalis Treshchev, 1966Corynosoma seropedicus Machado, 1970Corynosoma shackletoni Zdzitowiecki, 1978Corynosoma similis Neiland, 1962Corynosoma singularis Skrjabin and Nilolskii, 1971Corynosoma strumosum (Rudolphi, 1802)Corynosoma sudsuche Belopolskaia, 1958Corynosoma tunitae Weiss, 1914Corynosoma turbidum Van Cleave, 1937Corynosoma validum Van Cleave, 1953Corynosoma ventronudum Skrjabin, 1959Corynosoma villosum Van Cleave, 1953Corynosoma wegeneri Heinze, 1934Contains the following species:
Diplospinifer serpenticola Fukui, 1929Contains the following species:
Filicollis anatis (Schrank, 1788)Filicollis trophimenkoi Atrashkevich, 1982Hexaglandula
Contains the following species:
Hexaglandula ariusus Bilgees, 1971Hexaglandula corynosoma (Travassos, 1915)Hexaglandula inermis (Travassos, 1923)Hexaglandula karachiensis Bilgees, 1971Hexaglandula mutabilis (Rudolphi, 1819)Hexaglandula paucihamatus (Heinze, 1936)Contains the following species:
Polymorphus actuganensis Petrochenko, 1949Polymorphus acutis Van Cleave and Starrett, 1940Polymorphus biziurae Johnston and Edmonds, 1948Polymorphus cetaceum (Johnston and Best, 1942)Polymorphus cincli Belopolskaya, 1959Polymorphus contortus (Bremser, 1821)Polymorphus corynoides Skrjabin, 1913Polymorphus crassus Van Cleave, 1924Polymorphus cucullatus Van Cleave and Starrett, 1940Polymorphus diploinflatus Lundström, 1942Polymorphus gavii Hokhlova, 1965Polymorphus kostylewi Petrochenko, 1949Polymorphus magnus Skrjabin, 1913Polymorphus marchii (Porta, 1910)Polymorphus marilis Van Cleave, 1939Polymorphus mathevossianae Petrochenko, 1949Polymorphus meyeri Lundström, 1942Polymorphus miniatus (Linstow, 1896)Polymorphus obtusus Van Cleave, 1918Polymorphus paradoxus Connell and Corner, 1957Polymorphus phippsi Kostylev, 1922Polymorphus striatus (Goeze, 1782)Polymorphus strumosoides Lundström, 1942Polymorphus swartzi Schmidt, 1965Polymorphus trochus Van Cleave, 1945Contains the following species:
Profilicollis altmani (Perry, 1942)Profilicollis arcticus (Van Cleave, 1920)Profilicollis antarcticus (Zdzitowiecki, 1985)Profilicollis botulus (Van Cleave, 1916)Profilicollis bullocki (Mateo, 1982)Profilicollis chasmagnathi (Holcman-Spector, Mane-Garzon and Dei-Cas, 1977)Profilicollis formosus (Schmidt and Kuntz, 1967)Profilicollis kenti (Van Cleave, 1947)Profilicollis major (Lundström, 1942)Profilicollis minutus (Goeze, 1782)Profilicollis novaezelandensis (Brockerhoff, 2002)Profilicollis sphaerocephalus (Bremser, 1819)Profilicollis texensis (Webster, 1948)Contains the following species:
Southwellina dimorpha Schmidt, 1973 (= Ibirhynchus dimorpha)Southwellina hispida (Van Cleave, 1925)Southwellina macracanthus (Ward and Winter, 1952)
