Acantholaimus ewensis Platt & Zhang, 1982 accepted as Acantholaimus polydentatus Gerlach, 1951 (basis of record)
Acantholaimus longisetosus Allgén, 1933 (basis of record)
Acantholaimus polydentatus Gerlach, 1951 (basis of record)
Acantholaimus setosus Vitiello, 1970 (basis of record)
Acanthopharyngoides tyrrhenicus Wieser, 1954 (basis of record)
Acanthopharynx affinis Marion, 1870 (basis of record)
Acanthopharynx micans (Eberth, 1863) Marion, 1870 (basis of record)
Acanthopharynx micramphis Schuurmans Stekhoven, 1942 (basis of record)
Acanthopharynx perarmata Marion, 1870 (basis of record)
Acanthopharynx rigida Schuurmans Stekhoven, 1950 (basis of record)
Actinonema celtica Boucher, 1976 (basis of record)
Actinonema fidatum Vitiello, 1970 (basis of record)
Actinonema longicaudatum (Steiner, 1918) Wieser, 1954 (basis of record)
Actinonema pachydermatum Cobb, 1920 (basis of record)
Adoncholaimus derjugini (Ssaweljev, 1912) (basis of record)
Adoncholaimus fuscus (Bastian, 1865) Filipjev, 1918 (basis of record)
Adoncholaimus islandicus Kreis, 1963 (basis of record)
Adoncholaimus lepidus (de Man, 1889) Filipjev, 1918 (basis of record)
Adoncholaimus panicus Cobb, 1930 (basis of record)
Adoncholaimus thalassophygas (de Man, 1876) Filipjev, 1918 (basis of record)
Aegialoalaimus elegans de Man, 1907 (basis of record)
Aegialoalaimus tenuicaudatus Allgén, 1932 (basis of record)
Alaimella cincta Cobb, 1920 (basis of record)
Amphimonhystera anechma (Southern, 1914) Lorenzen, 1977 (basis of record)
Anoplostoma elegans Kreis, 1929 (basis of record)
Anoplostoma exceptum Schulz, 1935 (basis of record)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (basis of record)
Anticoma acuminata (Eberth, 1863) Bastian, 1865 (basis of record)
Anticoma arctica Steiner, 1916 (basis of record)
Anticoma brevicaudata Kreis, 1963 (basis of record)
Anticoma brevisetosa Platonova, 1967 (basis of record)
Anticoma eberthi Bastian, 1865 (basis of record)
Anticoma insulaealbae Filipjev, 1927 (basis of record)
Anticoma longicaudata Kreis, 1928 (basis of record)
Anticoma minor Filipjev, 1927 (basis of record)
Anticoma strandi Allgén, 1940 (basis of record)
Anticomopsis typica Micoletzky, 1930 (basis of record)
Anticyathus primitivus (Allgén, 1933) Gerlach, 1963 (basis of record)
Anticyclus exilis Cobb, 1920 (basis of record)
Anticyclus gigas Vitiello, 1969 (basis of record)
Anticyclus pachyamphis (Wieser, 1956) Gerlach, 1963 (basis of record)
Antomicron elegans (de Man, 1922) De Coninck, 1965 (basis of record)
Antomicron pellucidum Cobb, 1920 (basis of record)
Antomicron pratense Lorenzen, 1966 (basis of record)
Antomicron profundum Vitiello, 1971 (basis of record)
Aponema torosus (Lorenzen, 1973) Jensen, 1978 accepted as Aponema torosum (Lorenzen, 1973) Jensen, 1978 (basis of record)
Araeolaimus bioculatus (de Man, 1876) de Man, 1988 (basis of record)
Araeolaimus demani (Schuurmans Stekhoven, 1950) Wieser, 1956 (basis of record)
Araeolaimus elegans de Man, 1888 (basis of record)
Araeolaimus filipjevi Schuurmans Stekhoven & Adam, 1931 (basis of record)
Araeolaimus gajevskii Paramonov, 1929 (basis of record)
Araeolaimus longicauda Allgén, 1929 (basis of record)
Araeolaimus longisetosus Wieser, 1954 (basis of record)
Araeolaimus macrocirculus Kreis, 1928 (basis of record)
Araeolaimus mediterraneus (de Man, 1876) de Man, 1888 (basis of record)
Araeolaimus penelope Moore, 1977 (basis of record)
Araeolaimus ponticus Filipjev, 1922 (basis of record)
Araeolaimus septentrionalis Kreis, 1963 (basis of record)
Araeolaimus steineri (Steiner, 1916) Filipjev, 1922 (basis of record)
Araeolaimus supralitoralis Wieser, 1960 (basis of record)
Araeolaimus zosterae (Filipjev, 1918) Chitwood & Chitwood, 1937 (1938) (basis of record)
Ascolaimus elongatus (Bütschli, 1874) Shuurmans Stekhoven & de Coninck, 1932 (basis of record)
Astomonema southwardorum Austen, Warwick & Ryan, 1993 (basis of record)
Atrochromadora microlaima (de Man, 1889) Wieser, 1954 (basis of record)
Atrochromadora parva (de Man, 1893) Wieser, 1954 (basis of record)
Axonolaimus arcuatus Schuurmans Stekhoven, 1950 (basis of record)
Axonolaimus demani De Coninck & Schuurmans Stekhoven, 1933 (basis of record)
Axonolaimus drachi Luc & De Coninck, 1959 (basis of record)
Axonolaimus filiformis de Man, 1889 (basis of record)
Axonolaimus helgolandicus Lorenzen, 1971 (basis of record)
Axonolaimus hexapilus Wieser & Hopper, 1967 (basis of record)
Axonolaimus limalis Ssaweljev, 1912 (basis of record)
Axonolaimus orcombensis Warwick, 1970 (basis of record)
Axonolaimus paraspinosus Schuurmans Stekhoven & Adam, 1931 (basis of record)
Axonolaimus ponticus Filipjev, 1918 (basis of record)
Axonolaimus schuurmansstekhoveni Allgén, 1935 (basis of record)
Axonolaimus setosus Filipjev, 1918 (basis of record)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (basis of record)
Axonolaimus tirrenicus Brunetti, 1941 (basis of record)
Axonolaimus typicus de Man, 1922 (basis of record)
Axonolaimus villosus Skwarra, 1922 (basis of record)
Barbonema horridum Gerlach, 1956 (basis of record)
Barbonema setiferum Filipjev, 1927 (basis of record)
Bathylaimus arcticus Kreis, 1963 (basis of record)
Bathylaimus australis Cobb, 1894 (basis of record)
Bathylaimus capacosus Hopper, 1962 (basis of record)
Bathylaimus cobbi Filipjev, 1922 (basis of record)
Bathylaimus dentatus Kreis, 1963 (basis of record)
Bathylaimus denticaudatus Allgén, 1930 (basis of record)
Bathylaimus filicaudatus (Schuurmans Stekhoven & Adam, 1931) De Coninck & Schuurmans Stekhoven, 1933 (basis of record)
Bathylaimus inermis (Ditlevsen, 1918) De Man, 1922 (basis of record)
Bathylaimus longisetosus (Allgén, 1929) De Coninck & Schuurmans Stekhoven, 1933 (basis of record)
Bathylaimus macramphis Schuurmans Stekhoven & De Coninck, 1933 (basis of record)
Bathylaimus parafilicaudatus Allgén, 1935 accepted as Bathylaimus chesapeakensis Timm, 1952 (basis of record)
Bathylaimus paralongisetosus Schuurmans Stekhoven & De Coninck, 1933 (basis of record)
Bathylaimus septentrionalis (Filipjev, 1927) De Coninck & Stekhoven, 1933 (basis of record)
Bathylaimus stenolaimus Schuurmans-Stekhoven & De Coninck, 1933 (basis of record)
Bathylaimus tenuicaudatus (Allgén, 1933) Allgen, 1947 (basis of record)
Bathylaimus zostericola (Allgén, 1933) De Coninck & Stekhoven, 1933 (basis of record)
Belbolla teissieri (Luc & De Coninck, 1959) Andrássy, 1973 (basis of record)