Acanthosentis Podder, 1941 (verified source for family)
Acanthurus Agassiz, 1846 accepted as Acanthrus Acharius, 1780 (verified source for family)
Agama Gervais, 1842 (verified source for family)
Agamonematoideum Diesing, 1853 accepted as Agamonematodum Diesing, 1861 (verified source for family)
Ancyracanthus Diesing, 1838 accepted as Ancyracanthus Diesing, 1839 (verified source for family)
Angiostrongylus Drozdz, 1971 (verified source for family)
Anguillina Hammerschmidt, 1839 (verified source for family)
Anguillula Ehrenberg, 1831 (verified source for family)
Anisakis Mozgovoi, 1951 (verified source for family)
Asifia Lane, 1914 (verified source for family)
Aspiculuris Akhtar, 1955 (verified source for family)
Asymmetricus Kreis, 1930 accepted as Tricephalobus Steiner, 1936 (verified source for family)
Befilaria Chabaud, Petter & Golvan, 1961 (verified source for family)
Böhmiella Gebauer, 1932 accepted as Boehmiella Gebauer, 1932 (verified source for family)
Bulhõesia Schwenck, 1926 accepted as Bulhoesia Schwenck, 1926 accepted as Thelastoma Leidy, 1849 (verified source for family)
Bursaphelenchus Rühm, 1956 (verified source for family)
Cephachisma Rafinesque, 1832 (verified source for family)
Cephalipus Rafinesque, 1815 (verified source for family)
Chabaudiella Diaz-Ungria, 1964 † (verified source for family)
Cheiracanthus Diesing, 1839 (verified source for family)
Cholerophytum Debey, 1867 (verified source for family)
Choronema Cobb, 1920 (verified source for family)
Chromarina Kreis, 1929 (verified source for family)
Contracaecum Mozgovoi in Skrjabin et al., 1951 (verified source for family)
Crinon Kniphof, 1759 (verified source for family)
Cylicostomum Ihle, 1922 (verified source for family)
Cystagora Stafford, 1905 (verified source for family)
Dacnitis Dujardin, 1844 (verified source for family)
Diplogasteroides Rühm, 1956 (verified source for family)
Dirofilaria Faust, 1937 (verified source for family)
Discophorus Mehlis in Creplin, 1844 (verified source for family)
Echinonema Gemmill, 1901 accepted as Echinomermella Chitwood, 1933 (verified source for family)
Enchodrella Khan, 1964 accepted as Longidorella Thorne, 1939 (verified source for family)
Filarina Hammerschmidt, 1838 (verified source for family)
Fullebornema Trevassos & Darriba, 1929 accepted as Fuellebornema Trevassos & Darriba, 1929 accepted as Heligmostrongylus Travassos, 1917 (verified source for family)
Füllebornema Trevassos & Darriba, 1929 accepted as Fuellebornema Trevassos & Darriba, 1929 accepted as Heligmostrongylus Travassos, 1917 (verified source for family)
Gastrochaeta Grimm, 1877 (verified source for family)
Gephyronema Linstow in Augener, 1903 (verified source for family)
Goezia Mozgovoi in Skrjabin, Shikhobalova & Mozgovoi, 1951 (verified source for family)
Haptotrlcoma Lorenzen, 1977 (verified source for family)
Helmins Schlotthauber, 1860 (verified source for family)
Hexastoma Rolando, 1841 (verified source for family)
Heydonius Taylor, 1935 † (verified source for family)
Himatidiophila Rahm, 1925 (verified source for family)
Hobmaierostrongylus Boev, 1950 (verified source for family)
Kittia Sedlmeier, 1931 (verified source for family)
Lepturus Leuckart, 1848 (verified source for family)
Linguatula Schrank, 1796 (verified source for family)
Lumbricellus Chiaje, 1844 (verified source for family)
Lumbricicola Friedlaender, 1895 (verified source for family)
Malis Chisholm, 1815 (verified source for family)
Mastigodes Blainville, 1828 (verified source for family)
Merinthoidum Kraemer, 1855 (verified source for family)
Microannulatum Diab, 1966 (verified source for family)
Monnigofilaria Skrjabin & Shikhobalova, 1948 (verified source for family)
Multicaecum Mozgovoi in Skrjabin et al., 1951 (verified source for family)
Neocamallanus Chakravarty, Majumdar & Sain, 1961 (verified source for family)
Nervus Laporte, 1792 (verified source for family)
Neyrapharingodon Calvente, 1948 accepted as Neyrapharyngodon Calvente, 1948 (verified source for family)
Numidica Barreto, 1919 (verified source for family)
Odontophora Allgén, 1930 (verified source for family)
Ohridia Schneider in Stankovic, 1932 (verified source for family)
Oxysperura (verified source for family)
Pachydora Wieser, 1954 (verified source for family)
Paracomesoma Hopper, 1967 (verified source for family)
Paracosmocera Kung & Wu, 1945 (verified source for family)
Paraheligmonina Durette-Desset, 1971 † (verified source for family)
Paranisakis Mozgovoi in Skrjabin et al., 1951 (verified source for family)
Parasitylenchus Rühm, 1956 (verified source for family)
Parastrongylus Drozdz, 1971 † (verified source for family)
Paratylenchus Filipjev, 1936 (verified source for family)
Phaldonema Rathelot, 1892 (verified source for family)
Pharyngodon Calventi, 1948 (verified source for family)
Philometra Rasheed, 1963 (verified source for family)
Plectoïdes Man, 1904 accepted as Plectoides de Man, 1904 accepted as Plectus Bastian, 1865 (verified source for family)
Porrocaecum Karokhin, 1946 (verified source for family)
Proctobium Travassos, 1918 (verified source for family)
Pseudceobphalobus Joshi, 1972 accepted as Teratolobus Andrassy, 1968 (verified source for family)
Pygarginema Lyubimov, 1953 (verified source for family)
Rhabditis Osche, 1952 (verified source for family)
Rhytis Mayer, 1839 (verified source for family)
Stenodes Dujardin, 1844 (verified source for family)
Syncuaria Sobolev in Skrjabin et al., 1949 (verified source for family)
Syngamus Rizhikov, 1950 (verified source for family)
Tetrameres Gubanov, 1950 (verified source for family)
Trachynema Cobb, 1920 (verified source for family)
Trichens Gervais, 1848 (verified source for family)
Trypanoxyuris Sandosham, 1950 (verified source for family)
Uracanthus Diesing, 1861 (verified source for family)
Vetteria Jägerskiöld in Ekman, 1915 (verified source for family)
Vetteria Allgén, 1926 (verified source for family)
Wetamena Dale, 1967 (verified source for family)