# List of nematode families

List of Nematoda has 25,000 recorded species from the Nematode phylum. There are estimated to be a million.

## Class Chromadorea

Subclass Chromadoria
* Order Araeolaimida
** Superfamily Axonolaimoidea Filipjev, 1918
*** Axonolaimidae Filipjev, 1918
*** Bodonematidae Jensen, 1991
*** Comesomatidae Filipjev, 1918
*** Coninckiidae Lorenzen, 1981
*** Diplopeltidae Filipjev, 1918
* Order Ascaridida
* Order Chromadorida
** Suborder Chromadorina
*** Superfamily Chromadoroidea Filipjev, 1917
**** Achromadoridae Gerlach & Riemann, 1973
**** Chromadoridae Filipjev, 1917
**** Cyatholaimidae Filipjev, 1918
**** Ethmolaimidae Filipjev & Schuurmans Stekhoven, 1941
**** Neotonchidae Wieser & Hopper, 1966
**** Selachinematidae Cobb, 1915
* Order Desmodorida
** Suborder Desmodorina
*** Superfamily Desmodoroidea Filipjev, 1922
**** Desmodoridae Filipjev, 1922
**** Draconematidae Filipjev, 1918
**** Epsilonematidae Steiner, 1927
*** Superfamily Microlaimoidea Micoletzky, 1922
**** Aponchiidae Gerlach, 1963
**** Microlaimidae Micoletzky, 1922
**** Monoposthiidae Filipjev, 1934
* Order Desmoscolecida
** Suborder Desmoscolecina
*** Superfamily Desmoscolecoidea Shipley, 1896
**** Cyartonematidae Tchesunov, 1990
**** Desmoscolecidae Shipley, 1896
**** †Eophasmidae Poinar, 2011
**** Meyliidae de Coninck, 1965
* Order Monhysterida
** Suborder Linhomoeina
*** Superfamily Siphonolaimoidea Filipjev, 1918
**** Fusivermidae Tchesunov, 1996
**** Linhomoeidae Filipjev, 1922
**** Siphonolaimidae Filipjev, 1918
** Suborder Monhysterina
*** Superfamily Monhysteroidea Filipjev, 1929
**** Monhysteridae de Man, 1876
*** Superfamily Sphaerolaimoidea Filipjev, 1918
**** Sphaerolaimidae Filipjev, 1918
**** 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
* Order Rhabditida
** Incertae sedis
*** Brevibuccidae Paramonov, 1956
*** Chambersiellidae Thorne, 1937
*** Teratocephalidae Andrassy, 1958
** Suborder Myolaimina
*** Superfamily Myolaimoidea Andrassy, 1958
**** Myolaimidae Andrassy, 1958
** Suborder 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
***** Rhabditidae Örley, 1880
**** Superfamily Strongyloidea Baird, 1853
***** 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
** Suborder Spirurina
*** Infraorder Ascaridomorpha
**** Superfamily Ascaridoidea Baird, 1853
***** Acanthocheilidae Wülker, 1929
***** Anisakidae Railliet & Henry, 1912
***** 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
*** Infraorder Gnathostomatomorpha
**** Superfamily Gnathostomatoidea Railliet, 1895
***** Gnathostomatidae Railliet, 1895
*** Incertae sedis
**** Superfamily Dracunculoidea Stiles, 1907
***** Anguillicolidae Yamaguti, 1935
***** Daniconematidae Moravec & Køie, 1987
***** Dracunculidae Stiles, 1907
***** Guyanemidae Petter, 1975
***** Micropleuridae Baylis & Daubney, 1926
***** Philometridae Baylis & Daubney, 1926
***** Skrjabillanidae Shigin & Shigina, 1958
*** Infraorder Oxyuridomorpha
**** Superfamily Oxyuroidea Cobbold, 1864
***** Heteroxynematidae Skrjabin & Shikhobalova, 1948
***** 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
*** Infraorder Spiruromorpha
**** Superfamily Acuarioidea Railliet, Henry & Sisoff, 1912
***** Acuariidae Railliet, Henry & Sisoff, 1912
**** Superfamily Aproctoidea Skrjabin & Shikhobalova, 1945
***** Aproctidae Skrjabin & Shikhobalova, 1945
***** Desmidocercidae Cram, 1927
**** Superfamily Camallanoidea Travassos, 1920
***** Camallanidae Railliet & Henry, 1915
**** Superfamily Diplotriaenoidea Anderson, 1958
***** Diplotriaenidae Anderson, 1958
***** Oswaldofilariidae Chabaud & Choquet, 1953
**** Superfamily Filarioidea Chabaud & Anderson, 1959
***** Filariidae Chabaud & Anderson, 1959
***** Onchocercidae Leiper, 1911
**** Superfamily Habronematoidea Ivaschkin, 1961
***** Cystidicolidae Skrjabin, 1946
***** Habronematidae Ivaschkin, 1961
***** Hedruridae Railliet, 1916
***** Tetrameridae Travassos, 1914
**** Superfamily Physalopteroidea Railliet, 1893
***** Physalopteridae Railliet, 1893
**** Superfamily Rictularoidea Railliet, 1916
***** Rictulariidae Railliet, 1916
**** Superfamily Spiruroidea Oerley, 1885
***** Gongylonematidae Sobolev, 1949
***** Hartertiidae Quentin, 1970
***** Spirocercidae Chitwood & Wehr, 1932
***** Spiruridae Oerley, 1885
**** Superfamily Thelazioidea Skrjabin, 1915
***** Pneumospiruridae Wu & Hu, 1938
***** Rhabdochonidae Skrjabin, 1946
***** 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
***** Steinernematidae Filipjev, 1934
***** Strongyloididae Chitwood & McIntosh, 1934
*** Infraorder Tylenchomorpha
**** Superfamily Aphelenchoidea Fuchs, 1937
***** Aphelenchidae Fuchs, 1937
***** Aphelenchoididae Skarbilovich, 1947
**** Superfamily Criconematoidea Taylor, 1936
***** Criconematidae Taylor, 1936
***** Hemicycliophoridae Skarbilovich, 1959
***** 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
**** Superfamily Tylenchoidea Örley, 1880
***** Belonolaimidae Whitehead, 1959
***** Dolichodoridae Chitwood, 1950
***** Hoplolaimidae Filipjev, 1934
***** Meloidogynidae Skarbilovich, 1959
***** Pratylenchidae Thorne, 1949
***** 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

## Class Enoplea
### Subclass Dorylaimia

* Order Dioctophymatida
** Suborder Dioctophymatina
*** Dioctophymidae Railliet, 1915
*** Soboliphymatidae Petrov, 1930
* Order Dorylaimida
** Suborder Dorylaimina
*** Superfamily Belondiroidea Thorne, 1964
**** Belondiridae Thorne, 1939
*** Superfamily Dorylaimoidea de Man, 1876
**** Actinolaimidae Thorne, 1939
**** Aporcelaimidae Heyns, 1965
**** Dorylaimidae de Man, 1876
**** Longidoridae Thorne, 1935
**** Nordiidae Jairajpuri & Siddiqi, 1964
**** Qudsianematidae Jairajpuri, 1965
*** Incertae sedis
**** Thornenematidae Siddiqi, 1969
**** Thorniidae de Coninck, 1965
*** Superfamily Tylencholaimoidea Filipjev, 1934
**** Aulolaimoididae Jairajpuri, 1964
**** Leptonchidae Thorne, 1935
**** Mydonomidae Thorne, 1964
**** Tylencholaimellidae Jairajpuri, 1964
**** Tylencholaimidae Filipjev, 1934
** Suborder Nygolaimina
*** Superfamily Nygolaimoidea Thorne, 1935
**** Aetholaimidae Jairajpuri, 1965
**** Nygellidae Andrassy, 1958
**** Nygolaimellidae Clark, 1961
**** Nygolaimidae Thorne, 1935
* Order Isolaimida
** Superfamily Isolaimoidea Timm, 1969
*** Isolaimiidae Cobb, 1920
* Order Marimermithida
** Marimermithidae Rubtzov & Platonova, 1974
* Order Mermithida
** Suborder Mermithina
*** Superfamily Mermithoidea Braun, 1883
**** Mermithidae Braun, 1883
**** Tetradonematidae Cobb, 1919
* Order Mononchida
** Suborder Bathyodontina
*** Superfamily Cryptonchoidea Chitwood, 1937
**** Bathyodontidae Clark, 1961
**** Cryptonchidae Chitwood, 1937
*** Superfamily Mononchuloidea de Coninck, 1965
**** Mononchulidae de Coninck, 1965
** Suborder Mononchina
*** Superfamily Anatonchoidea Jairajpuri, 1969
**** Anatonchidae Jairajpuri, 1969
*** Incertae sedis
**** Cobbonchidae Jairajpuri, 1969
**** Iotonchidae Jairajpuri, 1969
*** Superfamily Mononchoidea Filipjev, 1934
**** Mononchidae Filipjev, 1934
**** Mylonchulidae Jairajpuri, 1969
* Order Muspiceida
** Suborder Muspiceina
*** Muspiceidae Bain & Chabaud, 1959
*** Robertdollfusiidae Chabaud & Campana, 1950
* Order Trichinellida
** Superfamily Trichinelloidea Ward, 1907
*** Anatrichosomatidae Yamaguti, 1961
*** Capillariidae Railliet, 1915
*** Cystoopsidae Skrjabin, 1923
*** Trichinellidae Ward, 1907
*** Trichosomoididae Yorke & Maplestone, 1926
*** Trichuridae Railliet, 1915

### Subclass Enoplia

* Order Enoplida
** Suborder Alaimina
*** Superfamily Alaimoidea Micoletzky, 1922
**** Alaimidae Micoletzky, 1922
** Suborder Campydorina
*** Superfamily Campydoroidea Jairajpuri, 1976
**** Campydoridae (Thorne, 1935)
** Suborder Dioctophymina
** Suborder Enoplina
*** Superfamily Enoploidea Dujardin, 1845
**** Anoplostomatidae Gerlach & Riemann, 1974
**** Anticomidae Filipjev, 1918
**** Enoplidae Dujardin, 1845
**** Phanodermatidae Filipjev, 1927
**** Thoracostomopsidae Filipjev, 1927
** Incertae sedis
*** Andrassyidae Tchesunov & Gagarin, 1999
** Suborder Ironina
*** Superfamily Ironoidea de Man, 1876
**** Ironidae de Man, 1876
**** Leptosomatidae Filipjev, 1916
**** Oxystominidae Chitwood, 1935
** Suborder Oncholaimina
*** Superfamily Oncholaimoidea Filipjev, 1916
**** Enchelidiidae Filipjev, 1918
**** Oncholaimidae Filipjev, 1916
**** Thalassogeneridae Orton Williams & Jairajpuri, 1984
** Suborder Trefusiina
*** Superfamily Trefusioidea Gerlach, 1966
**** Lauratonematidae Gerlach, 1953
**** Simpliconematidae Blome & Schrage, 1985
**** Trefusiidae Gerlach, 1966
**** Trischistomatidae Andrassy, 2007
**** Xenellidae de Coninck, 1965
** Suborder Trichinellina
** Suborder Tripyloidina
*** Superfamily Tripyloidoidea Filipjev, 1928
**** Tripyloididae Filipjev, 1918
* Order Triplonchida
** Suborder Diphtherophorina
*** Superfamily Diphtherophoroidea Micoletzkyi, 1922
**** Diphtherophoridae Micoletzky, 1922
**** Trichodoridae Thorne, 1935
** Incertae sedis
*** Bastianiidae de Coninck, 1965
*** Odontolaimidae Gerlach & Riemann, 1974
** Suborder Tobrilina
*** Superfamily Prismatolaimoidea Micoletzky, 1922
**** Prismatolaimidae Micoletzky, 1922
*** Superfamily Tobriloidea Filipjev, 1918
**** Pandolaimidae Belogurov, 1980
**** Rhabdodemaniidae Filipjev, 1934
**** Tobrilidae de Coninck, 1965
**** Triodontolaimidae de Coninck, 1965
** Suborder Tripylina
*** Superfamily Tripyloidea de Man, 1876
**** Tripyloidea de Man, 1876
**** Tripylidae de Man, 1876

## Incertae sedis

* Order Benthimermithida
** Benthimermithidae Petter, 1980
* Order Rhaptothyreida
** Rhaptothyreidae Hope & Murphy, 1969

## Class Secernentea

* Order Camallanida (sometimes included in Spirurida)
** Family Anguillicolidae
** Family Camallanidae
** Family Dracunculidae
** Family Micropleudidae
** Family Philometridae
* Order Drilonematida (sometimes included in Spirurida)
* Order Oxyurida (= Rhabdiasida)
** Family Heteroxynematidae
** Family Oxyuridae
** Family Pharyngodonidae
** Family Thelastomatidae
* Order Rhigonematida (formerly in Tylenchia)
* Order Spirurida
** Superfamily Acuarioidea
** Superfamily Aproctoidea
** Superfamily Diplotriaenoidea
** Superfamily Filarioidea
** Superfamily Gnathostomatoidea
** Superfamily Habronematoidea
** Superfamily Physalopteroidea
** Superfamily Rictularioidea
** Superfamily Spiruroidea
** Superfamily Thelazioidea

### Subclass Diplogasteria

(may belong in Rhabditia)
* Order Diplogasterida
* Suborder Chambersiellina Hodda 2007
** Superfamily Chambersielloidea Thorne 1937
*** Family Chambersiellidae Thorne 1937 (Sanwal 1957)
* Suborder Diplogasterina Paramonov 1952
** Superfamily Cylindrocorporoidea T. Goodey 1939
*** Family Cylindrocorporidae T. Goodey 1939
*** Family Odontopharyngidae Micoletzky 1922
** Superfamily Diplogasteroidea Micoletzky 1922
*** Family Cephalobiidae Travassos & Kloss 1960a
*** Family Diplogasteridae Micoletzky 1922
*** Family Diplogasteroididae Paramonov 1952
*** Family Neodiplogasteridae Paramonov 1952
*** Family Pseudodiplogasteroididae De Ley & Blaxter 2002
*** Family Tylopharyngidae Filipjev 1918
* Suborder Myolaimina Inglis 1983
** Superfamily Carabonematoidea Stammer & Wachek 1952
*** Family Carabonematidae Stammer & Wachek 1952
** Superfamily Myolaimoidea Goodey 1963
*** Family Myolaimidae Goodey 1963

### Subclass Tylenchia

(may belong in Rhabditia)
* Order Aphelenchida
** Family Aphelenchidae
** Family Aphelenchoididae
** Family Myenchildae
** Family Paraphelenchidae
* Order Tylenchida
* Superfamily Criconematoidea
** Family Criconematidae
** Family Tylenchulidae
* Superfamily Tylenchoidea
** Family Anguinidae
** Family Belonolaimidae
** Family Dolichodoridae
** Family Ecphyadophoridae
** Family Hoplolaimidae
** Family Heteroderidae
** Family Pratylenchidae
** Family Tylenchidae
* Superfamily Sphaerularina
** Family Allantonematidae
** Family Fergusobiidae
** Family Iotonchiidae
** Family Parasitylenchidae
** Family Sphaerulariidae