Actinonema pachydermatum Cobb, 1920 (basis of record)
Anoplostoma exceptum Schulz, 1935 (basis of record)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (basis of record)
Anticyclus pachyamphis (Wieser, 1956) Gerlach, 1963 (basis of record)
Antomicron elegans (de Man, 1922) De Coninck, 1965 (basis of record)
Aponema torosus (Lorenzen, 1973) Jensen, 1978 accepted as Aponema torosum (Lorenzen, 1973) Jensen, 1978 (basis of record)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (basis of record)
Bathylaimus stenolaimus Schuurmans-Stekhoven & De Coninck, 1933 (basis of record)
Campylaimus gerlachi Timm, 1961 (basis of record)
Chromadora nudicapitata Bastian, 1865 (basis of record)
Chromadorella duopapillata Platt, 1973 (basis of record)
Chromadorina germanica (Bütschli, 1874) Wieser, 1954 (basis of record)
Daptonema fistulatum (Wieser & Hopper, 1967) Lorenzen, 1977 (basis of record)
Daptonema normandicum (de Man, 1890) Lorenzen, 1977 (basis of record)
Desmodora pontica Filipjev, 1922 (basis of record)
Desmolaimus zeelandicus de Man, 1880 (basis of record)
Desmoscolex americanus Chitwood, 1936 (basis of record)
Desmoscolex falcatus Lorenzen, 1972 (basis of record)
Eleutherolaimus stenosoma de Man, 1907 (basis of record)
Enoplus communis Bastian, 1865 (basis of record)
Gammarinema ligiae Gerlach, 1967 (basis of record)
Halalaimus gracilis de Man, 1888 (basis of record)
Halalaimus isaitshikovi (Filipjev, 1927) Schuurmans Stekhoven, 1935 (basis of record)
Halalaimus longicaudatus (Filipjev, 1927) Schneider, 1939 (basis of record)
Halalaimus lutarus Vitiello, 1970 (basis of record)
Halalaimus turbidus Vitiello, 1970 (basis of record)
Laimella longicauda Cobb, 1920 (basis of record)
Leptolaimoides thermastris (Lorenzen, 1966) Vitiello, 1971 (basis of record)
Leptolaimus papilliger de Man, 1876 (basis of record)
Leptolaimus timmi Vitiello, 1971 accepted as Rhadinema timmi (Vitiello, 1971) Holovachov & Boström, 2014 (basis of record)
Leptolaimus venustus Lorenzen, 1972 (basis of record)
Metadasynemella cassidiniensis Vitiello & Haspeslagh, 1972 (basis of record)
Metalinhomoeus filiformis (de Man, 1907) accepted as Desmolaimus brasiliensis Gerlach, 1963 (basis of record)
Metalinhomoeus longiseta Kreis, 1929 (basis of record)
Monoposthia costata (Bastian, 1865) de Man, 1889 (basis of record)
Nemanema cylindraticaudatum (de Man, 1922) Filipjev, 1927 (basis of record)
Oncholaimus dujardinii de Man, 1876 (basis of record)
Oncholaimus oxyuris Ditlevsen, 1911 (basis of record)
Oxystomina elongata (Bütschli, 1874) Filipjev, 1921 (basis of record)
Paracanthonchus macrodon (Ditlevsen, 1918) Micoletzky, 1924 (basis of record)
Paracomesoma dubium (Filipjev, 1918) Schuurmans Stekhoven, 1950 (basis of record)
Paramesacanthion tricuspis (Schuurmans Stekhoven, 1950) Wieser, 1953 (basis of record)
Paramonohystera pellucida (Cobb, 1920) (basis of record)
Paramonohystera riemanni (Platt, 1973) Lorenzen, 1977 (basis of record)
Parasphaerolaimus paradoxus Ditlevsen, 1918 (basis of record)
Phanoderma campbelli Allgén, 1927 accepted as Metaphanoderma campbelli (Allgen, 1927) Platonova, 1984 (basis of record)
Phanoderma cocksi Bastian, 1865 (basis of record)
Pomponema elegans Lorenzen, 1972 (basis of record)
Prochromadora orleji (de Man, 1880) Filipjev, 1922 (basis of record)
Prochromadorella attenuata (Gerlach, 1952) Lorenzen, 1972 (basis of record)
Pselionema longissimum Gerlach, 1953 (basis of record)
Ptycholaimellus ponticus (Filipjev, 1922) Gerlach, 1955 (basis of record)
Quadricoma scanica (Allgén, 1935) accepted as Tricoma (Quadricoma) scanica (Allgén, 1935) (basis of record)
Rhabditis (Pellioditis) marina (Bastian, 1865) Dougherty, 1955 accepted as Litoditis marina (Bastian, 1865) Sudhaus, 2011 (basis of record)
Rhabdocoma riemanni Jayasree & Warwick, 1977 accepted as Rhabdocoma americana Cobb, 1920 (basis of record)
Rhabdodemania minor (Southern, 1914) Baylis & Daubney, 1926 (basis of record)
Richtersia demani Schuurmans Stekhoven, 1935 (basis of record)
Sabatieria breviseta Schuurmans Stekhoven, 1935 accepted as Sabatieria pulchra (Schneider, 1906) Riemann, 1970 (basis of record)
Sabatieria celtica Southern, 1914 (basis of record)
Sabatieria praedatrix de Man, 1907 (basis of record)
Sabatieria pulchra (Schneider, 1906) Riemann, 1970 (basis of record)
Setosabatieria hilarula (de Man, 1922) (basis of record)
Sphaerolaimus balticus Schneider, 1906 (basis of record)
Sphaerolaimus dispar Filipjev, 1918 accepted as Parasphaerolaimus dispar (Filipjev, 1918) Filipjev, 1946 (basis of record)
Sphaerolaimus gracilis de Man, 1876 (basis of record)
Sphaerolaimus macrocirculus Filipjev, 1918 (basis of record)
Sphaerolaimus minutus Vitiello, 1971 (basis of record)
Sphaerolaimus pacificus Allgén, 1947 (basis of record)
Spilophorella candida Gerlach, 1951 (basis of record)
Spilophorella paradoxa (de Man, 1888) Filipjev, 1917 (basis of record)
Synonchiella riemanni Warwick, 1970 (basis of record)
Terschellingia communis de Man, 1888 (basis of record)
Terschellingia longicaudata de Man, 1907 (basis of record)
Theristus acer Bastian, 1865 (basis of record)
Theristus littoralis Filipjev, 1922 (basis of record)
Trefusia longicauda de Man, 1893 (basis of record)
Tricoma brevirostris (Southern, 1914) (basis of record)
Xyala striata Cobb, 1920 (basis of record)