Aegialoalaimus elegans de Man, 1907 (additional source)
Anticoma acuminata (Eberth, 1863) Bastian, 1865 (taxonomy source)
Atrochromadora microlaima (de Man, 1889) Wieser, 1954 (additional source)
Camacolaimus tardus de Man, 1889 accepted as Deontolaimus tardus (de Man, 1889) Holovachov & Boström, 2015 (additional source)
Campylaimus gerlachi Timm, 1961 (additional source)
Campylaimus inaequalis Cobb, 1920 (additional source)
Chromadorita mucrodonta (Steiner, 1916) Wieser, 1954 (additional source)
Cylicolaimus magnus (Villot, 1875) de Man, 1889 (additional source)
Daptonema nanum (Lorenzen, 1971) Lorenzen, 1977 (additional source)
Daptonema paratortum (Vitiello, 1971) Lorenzen, 1977 (additional source)
Deontostoma arcticum (Ssaweljev, 1912) Filipjev, 1916 (additional source)
Desmodora tenuispiculum Allgén, 1928 accepted as Desmodorella tenuispiculum (Allgén, 1928) Gerlach, 1963 (additional source)
Desmolaimus de Man, 1880 (additional source)
Desmoscolex amaurus Lorenzen, 1972 (additional source)
Desmoscolex americanus Chitwood, 1936 (additional source)
Desmoscolex falcatus Lorenzen, 1972 (additional source)
Desmoscolex labiosus Lorenzen, 1969 (additional source)
Desmoscolex petalodes Lorenzen, 1972 (additional source)
Dichromadora Kreis, 1929 (additional source)
Dichromadora cucullata Lorenzen, 1973 (additional source)
Diplopeltis incisus Southern, 1914 accepted as Diplopeltula incisa (Southern, 1914) Gerlach, 1962 accepted as Neodiplopeltula incisa (Southern, 1914) Holovachov & Boström, 2018 (additional source)
Ethmolaimidae Filipjev & Schuurmans Stekhoven, 1941 (additional source)
Litinium bananum Gerlach, 1956 (additional source)
Mesacanthion Filipjev, 1927 (taxonomy source)
Meyliidae De Coninck, 1965 (additional source)
Monhystera Bastian, 1865 (taxonomy source)
Monhystera microphthalma de Man, 1880 accepted as Monhystrella microphthalma (de Man, 1880) Jacobs, 1987 (additional source)
Neochromadora Micoletzky, 1924 (additional source)
Neotonchus corcundus (Gerlach, 1956) Wieser & Hopper, 1966 (additional source)
Pselionema annulatum (Filipjev, 1922) Cobb, 1933 (additional source)
Quadricoma scanica (Allgén, 1935) accepted as Tricoma (Quadricoma) scanica (Allgén, 1935) (additional source)
Rhips Cobb, 1920 (additional source)
Sabatieria celtica Southern, 1914 (additional source)
Sabatieria hilarula (Chitwood, 1951) nec. de Man, 1922 accepted as Setosabatieria hilarula (de Man, 1922) (taxonomy source)
Sabatieria longicaudata Filipjev, 1922 (additional source)
Sabatieria praedatrix de Man, 1907 (additional source)
Sabatieria pulchra (Schneider, 1906) Riemann, 1970 (taxonomy source)
Sabatieria vulgaris de Man, 1907 accepted as Sabatieria pulchra (Schneider, 1906) Riemann, 1970 (additional source)
Sphaerolaimus dispar Filipjev, 1918 accepted as Parasphaerolaimus dispar (Filipjev, 1918) Filipjev, 1946 (additional source)
Sphaerolaimus hirsutus Bastian, 1865 (additional source)
Sphaerolaimus macrocirculus Filipjev, 1918 (additional source)
Terschellingia longicaudata de Man, 1907 (taxonomy source)
Theristus Bastian, 1865 (additional source)
Trefusia litoralis (Allgén, 1932) (additional source)
Tricoma nematoides (Greeff, 1869) (additional source)
Viscosia elegans (Kreis, 1924) Lorenzen, 1981 (additional source)
Xyala striata Cobb, 1920 (additional source)