• Acanthopharyngoides bidentatus Jensen, 1985
• Acanthopharyngoides chitwoodi Wieser, 1954
• Acanthopharyngoides duplex Gerlach, 1963
• Acanthopharyngoides quintus Riemann & Schrage, 1977
• Acanthopharyngoides scleratus Chitwood, 1936
• Acanthopharyngoides tyrrhenicus Wieser, 1954
• Acanthopharynx affinis Marion, 1870
• Acanthopharynx brachycapitata (Allgén, 1947) Gerlach, 1963 (uncertain > taxon inquirendum)
• Acanthopharynx denticulatus Wieser, 1954
• Acanthopharynx distechei Decraemer & Coomans, 1978
• Acanthopharynx dormitata Leduc & Zhao, 2016
• Acanthopharynx japonica Steiner & Hoeppli, 1926
• Acanthopharynx marioni Schuurmans Stekhoven, 1942 accepted as Acanthopharynx micans (Eberth, 1863) Marion, 1870
• Acanthopharynx merostomacha (Steiner, 1921) Schuurmans Stekhoven, 1943 (uncertain > taxon inquirendum)
• Acanthopharynx micans (Eberth, 1863) Marion, 1870
• Acanthopharynx micramphis Schuurmans Stekhoven, 1942
• Acanthopharynx nuda (Cobb, 1920) Gerlach, 1963
• Acanthopharynx oculata Marion, 1870 accepted as Cyatholaimus oculatus (Marion, 1870) Rouville, 1905
• Acanthopharynx parva Tchesunov, Rodriguez Garcia, Simakova & Mokievsky, 2023
• Acanthopharynx perarmata Marion, 1870
• Acanthopharynx rigida Schuurmans Stekhoven, 1950
• Acanthopharynx seticauda Schuurmans Stekhoven, 1950 accepted as Acanthopharynx micans (Eberth, 1863) Marion, 1870
• Acanthopharynx setosissima Schuurmans Stekhoven, 1943 (uncertain > taxon inquirendum)
• Acanthopharynx similis (Allgén, 1932) Gerlach, 1963 (uncertain > taxon inquirendum)
• Acanthopharynx striatipunctata Marion, 1870 accepted as Cyatholaimus striatipunctatus (Marion, 1870) Wieser, 1954
• Aculeonchus sphaericus Kreis, 1928 accepted as Desmodora (Croconema) sphaericum (Kreis, 1928) Luc & De Coninck, 1959 accepted as Croconema sphaerica (Kreis, 1928) Gerlach, 1963
• Adelphos rolandi Ott, 1997
• Akanthepsilonema helleouetae Gourbault & Decraemer, 1991
• Akanthepsilonema oceanopolis Zeppilli, Bongiorni, Decraemer & Vanreusel, 2014
• Akanthepsilonema sinecornibus Raes, Decraemer & Vanreusel, 2006
• Alaimonema multicinctum Cobb, 1920 (uncertain > taxon inquirendum)
• Amphispira rotundicephala Cobb, 1920
• Apenodraconema chlidosis Allen & Noffsinger, 1978
• Apenodraconema spinicaudum (Gerlach, 1958) Allen & Noffsinger, 1978
• Archepsilonema adelum Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Archepsilonema bathycolum Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Archepsilonema celidotum Steiner, 1931
• Archepsilonema gaussi Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Archepsilonema microamphidis Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Archepsilonema poicilocricum Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Archepsilonema sagmacricum Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Archepsilonema schizocricum Steiner, 1931 accepted as Archepsilonema celidotum Steiner, 1931
• Bathychaetosoma uchidai (Kito, 1983) Decraemer, Gourbault & Backeljau, 1997
• Bathyepsilonema anulosum Verschelde & Vincx, 1992
• Bathyepsilonema bahiae Gerlach, 1957 accepted as Perepsilonema bahiae (Gerlach, 1957) Lorenzen, 1973
• Bathyepsilonema brachycephalum Steiner, 1931
• Bathyepsilonema cobbi Steiner, 1931
• Bathyepsilonema compactum Clasing, 1984
• Bathyepsilonema condylocricum Steiner, 1931 accepted as Bathyepsilonema brachycephalum Steiner, 1931
• Bathyepsilonema cricotum Steiner, 1931 accepted as Bathyepsilonema brachycephalum Steiner, 1931
• Bathyepsilonema dermoglyphum Gourbault & Decraemer, 1987
• Bathyepsilonema dicampterum Steiner, 1931 accepted as Bathyepsilonema brachycephalum Steiner, 1931
• Bathyepsilonema drygalskii Steiner, 1931
• Bathyepsilonema gracilis accepted as Bathyepsilonema brachycephalum Steiner, 1931
• Bathyepsilonema lissum Clasing, 1984
• Bathyepsilonema lopheliae Raes, Vanreusel & Decraemer, 2003
• Bathyepsilonema monniotorum Gourbault & Decraemer, 1987
• Bathyepsilonema pustulatum Gerlach, 1952 accepted as Epsilonema pustulatum (Gerlach, 1952)
• Bathyepsilonema salvati Gourbault & Decraemer, 1992
• Bathyepsilonema spongiosum Clasing, 2005
• Bathyepsilonema vulgare Gourbault & Decraemer, 1987
• Bla nini Inglis, 1963 accepted as Desmodora nini (Inglis, 1963) Verschelde, Gourbault & Vincx, 1998
• Bolbonema braziliensis Larrazábal-Filho, Neres & Esteves, 2018
• Bolbonema brevicolle Cobb, 1920
• Bolbonema longisetosum (Jensen, 1985) Verschelde et al., 1998
• Bolbonema papillae Larrazábal-Filho, Neres & Esteves, 2018
• Bolbonema rabosum (Gerlach, 1956) Leduc & Verschelde, 2015
• Bolbonema spiralis Hourston & Warwick, 2010
• Bolbonema zildae Larrazáal-Filho, Neres & Esteves, 2018
• Bradylaimus asupplementus (Crites, 1961) Wieser & Hopper, 1967
• Bradylaimus parvus Stekhoven, 1931
• Catanema australis Hourston & Warwick, 2010
• Catanema cobbi Inglis, 1967 accepted as Laxus cobbi (Inglis, 1967) Ott, Bauer-Nebelsick & Novotny, 1995
• Catanema dambayensis Tchesunov, 2013
• Catanema exile Cobb, 1920
• Catanema macintyrei Platt & Zhang, 1982 accepted as Robbea macintyrei (Platt & Zhang, 1982) Tchesunov, 2013
• Catanema porosum Hopper & Cefalu, 1973 accepted as Robbea porosum (Hopper & Cefalu, 1973) Tchesunov, 2013
• Catanema schiemeri Ott, Pröts & Scharhauser, 2020
• Catanema smo Platt & Zhang, 1982 accepted as Robbea smo (Platt & Zhang, 1982) Tchesunov, 2013
• Centonema renamphidum Leduc, 2013
• Cephalochaetosoma pacificum Kito, 1983
• Cephalochaetosoma pacificum notium Decraemer & Gourbault, 1997
• Cephalochaetosoma pacificum pacificum Kito, 1983 (Decraemer & Gourbault, 1997)
• Cephalochaetosoma uchidai Kito, 1983 accepted as Bathychaetosoma uchidai (Kito, 1983) Decraemer, Gourbault & Backeljau, 1997
• Chaetosoma annulatum Ditlevsen, 1915 accepted as Draconema cephalatum (Cobb, 1913) Steiner, 1921
• Chaetosoma armatum Giard & Barrois, 1874 accepted as Draconema claparedii (Metschnikoff, 1867) Filipjev, 1918
• Chaetosoma campbelli Allgén, 1932 accepted as Prochaetosoma campbelli (Allgén, 1932) Allen & Noffsinger, 1978
• Chaetosoma cephalatum (Cobb, 1913) Steiner, 1921 accepted as Draconema cephalatum (Cobb, 1913) Steiner, 1921
• Chaetosoma claparedii Metschnikoff, 1867 accepted as Draconema claparedii (Metschnikoff, 1867) Filipjev, 1918
• Chaetosoma falcatum Irwin-Smith, 1918 accepted as Dracograllus falcatum (Irwin-Smith, 1918) Allen & Noffsinger, 1978
• Chaetosoma groenlandicum Levinsen, 1882 (uncertain > taxon inquirendum)
• Chaetosoma haswelli Irwin-Smith, 1918 accepted as Draconema haswelli (Irwin-Smith, 1918) Allen & Noffsinger, 1978
• Chaetosoma hibernicum Southern, 1914 accepted as Draconema claparedii (Metschnikoff, 1867) Filipjev, 1918
• Chaetosoma inarimense (Panceri, 1878) Allgén, 1939 accepted as Draconema inarimense (Panceri, 1878) Allen & Noffsinger, 1978
• Chaetosoma longicapitatum Allgén, 1932 accepted as Prochaetosoma longicapitata (Allgén, 1932) Allen & Noffsinger, 1978
• Chaetosoma longuirostrum Schepotieff, 1907 (uncertain > taxon inquirendum)
• Chaetosoma macrocephalum Schepotieff, 1907 accepted as Draconema claparedii (Metschnikoff, 1867) Filipjev, 1918
• Chaetosoma meridionalis Kreis, 1938 (uncertain > taxon inquirendum)
• Chaetosoma ophicephalum Claparède, 1863 accepted as Draconema ophicephalum (Claparède, 1863) Filipjev, 1918
• Chaetosoma primitivum Steiner, 1916 accepted as Prochaetosoma primitiva (Steiner, 1916)