线虫的分类
色矛纲

色矛纲（Chromadorea）之下只有色矛亚纲（Chromadoria）一個分類單元，包括下列各目：
薄咽目 Araeolaimida
微斑线虫总科 Axonolaimoidea Filipjev, 1918
薄咽科 Araeolaimidae De Coninck, 1965
微斑線蟲科 Axonolaimidae Filipjev, 1918
Bodonematidae Jensen, 1991
联体线虫科 Comesomatidae Filipjev, 1918
Coninckiidae Lorenzen, 1981
双盾线虫科 Diplopeltidae Filipjev, 1918
色矛目 Chromadorida
色矛亞目 Chromadorina
色矛總科 Chromadoroidea Filipjev, 1917
Achromadoridae Gerlach & Riemann, 1973
色矛科 Chromadoridae Filipjev, 1917
Cyatholaimidae Filipjev, 1918
Ethmolaimidae Filipjev & Schuurmans Stekhoven, 1941
Neotonchidae Wieser & Hopper, 1966
Selachinematidae Cobb, 1915
链环线虫目 Desmodorida
链环线虫亚目 Desmodorina
连环线虫总科 Desmodoroidea Filipjev, 1922
链环线虫科 Desmodoridae Filipjev, 1922
Draconematidae Filipjev, 1918
Epsilonematidae Steiner, 1927
微咽线虫总科 Microlaimoidea Micoletzky, 1922
Aponchiidae Gerlach, 1963
微咽线虫科 Microlaimidae Micoletzky, 1922
单茎线虫科 Monoposthiidae Filipjev, 1934
带线虫目 Desmocolecida
带线虫亚目 Desmocolecina
带线虫总科 Desmoscolecoidea Shipley, 1896
Cyartonematidae Tchesunov, 1990
带线虫科 Desmoscolecidae Shipley, 1896
†Eophasmidae Poinar, 2011
Meyliidae de Coninck, 1965
单宫目 Monhysterida
条线虫亚目 Linhomoeina
Superfamily Siphonolaimoidea Filipjev, 1918
Fusivermidae Tchesunov, 1996
条线虫科 Linhomoeidae Filipjev, 1922
Siphonolaimidae Filipjev, 1918
单宫线虫亚目 Monhysterina
单宫线虫总科 Monhysteroidea Filipjev, 1929
单宫线虫科 Monhysteridae de Man, 1876
Superfamily Sphaerolaimoidea Filipjev, 1918
Sphaerolaimidae Filipjev, 1918
希阿利线虫科 Xyalidae Chitwood, 1951
Order Plectida
Suborder Ceramonematina
Superfamily Ceramonematoidea Cobb, 1933
Ceramonematidae Cobb, 1933
Diplopeltoididae Tchesunov, 1990
Paramicrolaimidae Lorenzen, 1981
Tarvaiidae Lorenzen, 1981
Tubolaimoididae Lorenzen, 1981
Incertae sedis
Superfamily Haliplectoidea Chitwood, 1951
Haliplectidae Chitwood, 1951
Aegialoalaimidae Lorenzen, 1981
Aulolaimidae Jairajpuri & Hopper, 1968
Suborder Plectina
Superfamily Camacolaimoidea Micoletzky, 1924
Camacolaimidae Micoletzky, 1924
Rhadinematidae Lorenzen, 1981
Superfamily Leptolaimoidea Örley, 1880
Aphanolaimidae Chitwood, 1936
Leptolaimidae Örley, 1880
Superfamily Ohridioidea (Andrassy, 1976)
Creagrocercidae Baylis, 1943
Ohridiidae Andrássy, 1976
Superfamily Plectoidea Örley, 1880
Chronogastridae Gagarin, 1975
Metateratocephalidae Eroshenko, 1973
Plectidae Örley, 1880
小杆目 Rhabditida
Incertae sedis
Brevibuccidae Paramonov, 1956
Chambersiellidae Thorne, 1937
Teratocephalidae Andrassy, 1958
Suborder Myolaimina
Superfamily Myolaimoidea Andrassy, 1958
Myolaimidae Andrassy, 1958
小杆线虫亚目 Rhabditina
Infraorder Bunonematomorpha
Superfamily Bunonematoidea Micoletzky, 1922
Bunonematidae Micoletzky, 1922
Pterygorhabditidae Goodey, 1963
Infraorder Diplogasteromorpha
Superfamily Cylindrocorporoidea Goodey, 1939
Cylindrocorporidae Goodey, 1939
Superfamily Diplogasteroidea Micoletzky, 1922
Cephalobiidae Filipjev, 1934
Diplogasteridae Micoletzky, 1922
Diplogasteroididae Filipjev & Schuurmans Stekhoven, 1941
Mehdinematidae Farooqui, 1967
Neodiplogasteridae Paramonov, 1952
Pseudodiplogasteroididae Körner, 1954
Superfamily Odontopharyngoidea Micoletzky, 1922
Odontopharyngidae Micoletzky, 1922
Infraorder Rhabditomorpha
Incertae sedis
Agfidae Dougherty, 1955
Carabonematidae Stammer & Wachek, 1952
Superfamily Mesorhabditoidea Andrassy, 1976
Mesorhabditidae Andrassy, 1976
Peloderidae Andrassy, 1976
Superfamily Rhabditoidea Örley, 1880
Diploscapteridae Micoletzky, 1922
小杆线虫科 Rhabditidae Örley, 1880
Superfamily Strongyloidea Baird, 1853
钩口线虫科 Ancylostomatidae Looss, 1905
Diaphanocephalidae Travassos, 1920
Heligmosomidae Cram, 1927
Heterorhabditidae Poinar, 1976
Metastrongylidae Diesing, 1851
Moleinidae Durette-Desset & Chabaud, 1977
Strongylidae Baird, 1853
Trichostrongylidae Leiper, 1912
旋尾亞目 Spirurina
蛔形下目 Ascaridomorpha
蛔蟲總科 Ascaridoidea Baird, 1853
Acanthocheilidae Wülker, 1929
海獸胃線蟲科 Anisakidae Railliet & Henry, 1912
蛔蟲科 Ascarididae Baird, 1853
Heterocheilidae Railliet & Henry, 1915
Raphidascarididae Hartwich, 1954
Superfamily Cosmocercoidea Travassos, 1925
Atractidae Travassos, 1919
Cosmocercidae Travassos, 1925
Kathlaniidae Travassos, 1918
Superfamily Heterakoidea Railliet & Henry, 1912
Ascaridiidae Travassos, 1919
Aspidoderidae Skrjabin & Shikhobalova, 1947
Heterakidae Railliet & Henry, 1912
Superfamily Seuratoidea Railliet, 1906
Chitwoodchabaudiidae Puylaert, 1970
Cucullanidae Cobbold, 1864
Quimperiidae Gendre, 1928
Schneidernematidae Freitas, 1956
Seuratidae Railliet, 1906
Superfamily Subuluroidea Yorke & Maplestone, 1926
Maupasinidae Inglis, 1959
Subuluridae Yorke & Maplestone, 1926
颚口线虫下目 Gnathostomatomorpha
颚口线虫总科 Gnathostomatoidea Railliet, 1895
颚口线虫科 Gnathostomatidae Railliet, 1895
Incertae sedis
龙线虫总科 Dracunculoidea Stiles, 1907
Anguillicolidae Yamaguti, 1935
Daniconematidae Moravec & Køie, 1987
龙线虫科 Dracunculidae Stiles, 1907
Guyanemidae Petter, 1975
Micropleuridae Baylis & Daubney, 1926
嗜子宫线虫科 Philometridae Baylis & Daubney, 1926
Skrjabillanidae Shigin & Shigina, 1958
尖尾线虫下目 Oxyuridomorpha
尖尾线虫总科 Oxyuroidea Cobbold, 1864
Heteroxynematidae Skrjabin & Shikhobalova, 1948
尖尾線蟲科 Oxyuridae Cobbold, 1864
Pharyngodonidae Travassos, 1919
Superfamily Thelastomatoidea Travassos, 1929
Hystrignathidae Travassos, 1929
Protrelloididae Chitwood, 1932
Thelastomatidae Travassos, 1929
Travassosinematidae Rao, 1958
Infraorder Rhigonematomorpha
Superfamily Ransomnematoidea Travassos, 1930
Camoyidae Travassos & Kloss, 1960
Hethidae Travassos & Kloss, 1960
Ransomnematidae Travassos, 1930
Superfamily Rhigonematoidea Artigas, 1930
Ichthyocephalidae Travassos & Kloss, 1958
Rhigonematidae Artigas, 1930
旋尾下目 Spiruromorpha
华首总科 Acuarioidea Railliet, Henry & Sisoff, 1912
华首科 Acuariidae Railliet, Henry & Sisoff, 1912
Aproctoidea Skrjabin & Shikhobalova, 1945
Aproctidae Skrjabin & Shikhobalova, 1945
Desmidocercidae Cram, 1927
Camallanoidea Travassos, 1920
Camallanidae Railliet & Henry, 1915
双三齿线虫总科 Diplotriaenoidea Anderson, 1958
双三齿线虫科 Diplotriaenidae Anderson, 1958：在Levin (1968)屬絲蟲總科
Oswaldofilariidae Chabaud & Choquet, 1953
丝虫总科 Filarioidea Chabaud & Anderson, 1959
丝虫科 Filariidae Chabaud & Anderson, 1959
蟠尾丝虫科 Onchocercidae Leiper, 1911
柔线虫总科 Habronematoidea Ivaschkin, 1961
Cystidicolidae Skrjabin, 1946
柔线虫科 Habronematidae Ivaschkin, 1961
Hedruridae Railliet, 1916
Tetrameridae Travassos, 1914
泡翼总科 Physalopteroidea Railliet, 1893
泡翼科 Physalopteridae
Rictularoidea Railliet, 1916
Rictulariidae Railliet, 1916
旋尾总科 Spiruroidea Oerley, 1885
Gongylonematidae Sobolev, 1949
Hartertiidae Quentin, 1970
Spirocercidae Chitwood & Wehr, 1932
旋尾科 Spiruridae Oerley, 1885
吸吮总科 Thelazioidea Skrjabin, 1915
Pneumospiruridae Wu & Hu, 1938
Rhabdochonidae Skrjabin, 1946
吸吮科 Thelaziidae Skrjabin, 1915
Suborder Tylenchina
Infraorder Cephalobomorpha
Superfamily Cephaloboidea Filipjev, 1934
Alirhabditidae Suryawanshi, 1971
Bicirronematidae Andrassy, 1978
Cephalobidae Filipjev, 1934
Elaphonematidae Heyns, 1962
Osstellidae Heyns, 1962
Infraorder Drilonematomorpha
Superfamily Drilonematoidea Pierantoni, 1916
Drilonematidae Pierantoni, 1916
Homungellidae Timm, 1966
Pharyngonematidae Chitwood, 1950
Ungellidae Chitwood, 1950
Incertae sedis
Superfamily Anguinoidea Nicoll, 1935
Infraorder Panagrolaimomorpha
Superfamily Panagrolaimoidea Thorne, 1937
Panagrolaimidae Thorne, 1937
Superfamily Strongyloidoidea Chitwood & McIntosh, 1934
Alloionematidae Chitwood & McIntosh, 1934
Rhabdiasidae Railliet, 1916
斯氏线虫科 Steinernematidae Filipjev, 1934
Strongyloididae Chitwood & McIntosh, 1934
垫刃线虫下目 Tylenchomorpha
滑刃线虫总科 Aphelenchoidea
滑刃线虫科 Aphelenchoididae Fuchs, 1937
有尾片芽葉線蟲科 Aphelenchidae Fuchs, 1937
少尾片芽葉線蟲科 Aphelenchoididae Skarbilovich, 1947
Superfamily Criconematoidea Taylor, 1936
Criconematidae Taylor, 1936
Hemicycliophoridae Skarbilovich, 1959
半穿刺线虫科 Tylenchulidae Skarbilovich, 1947
Superfamily Myenchoidea Pereira, 1931
Myenchidae Pereira, 1931
Superfamily Sphaerularioidea Lubbock, 1861
Anguinidae Nicoll, 1935
Iotonchidae Goodey, 1935
Neotylenchidae Thorne, 1941
Sphaerulariidae Lubbock, 1861
垫刃线虫总科 Tylenchoidea Örley, 1880
刺线虫科 Belonolaimidae Whitehead, 1959
Dolichodoridae Chitwood, 1950
Hoplolaimidae Filipjev, 1934
根结线虫科 Meloidogynidae Skarbilovich, 1959
短体线虫科 Pratylenchidae Thorne, 1949
垫刃线虫科 Tylenchidae Örley, 1880
Order Spirurida
Suborder Camallanina
Order Strongylida
Superfamily Metastrongyloidea Lane, 1917
Pseudaliidae Railliet & Henry, 1909
Superfamily Trichostrongyloidea (Durette-Desset, 1985)
Amidostomatidae Baylis & Daubney, 1926