Adoncholaimus thalassophygas (de Man, 1876) Filipjev, 1918 (additional source)
Adorus astridae Jensen, 1979 (additional source)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (additional source)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (additional source)
Chromadorina bioculata (Schultze in Carus, 1857) Wieser, 1954 (additional source)
Chromadorita tenuis (G. Schneider, 1906) Filipjev, 1922 (additional source)
Daptonema trabeculosum (Schneider, 1906) Lorenzen, 1977 (additional source)
Desmolaimus zeelandicus de Man, 1880 (additional source)
Diplolaimella chitwoodi Gerlach, 1957 (additional source)
Diplolaimelloides bruciei Hopper, 1970 (additional source)
Enoplus brevis Bastian, 1865 (additional source)
Hypodontolaimus balticus (G. Schneider, 1906) Filipjev, 1918 (additional source)
Metoncholaimus scissus Wieser & Hopper, 1966 (additional source)
Microlaimus globiceps de Man, 1880 (additional source)
Monhystera disjuncta Bastian, 1865 accepted as Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 (additional source)
Monhystera parelegantula De Coninck, 1943 accepted as Monhystrella parelegantula (De Coninck, 1943) Andrássy, 1981 (additional source)
Monhystera parva (Bastian, 1865) Butschli, 1874 accepted as Thalassomonhystera parva (Bastian, 1865) Jacobs, 1987 (additional source)
Neochromadora izhorica Schuurmans Stekhoven, 1935 accepted as Neochromadora izhorica (Filipjev, 1929) Schuurmans-Stekhoven, 1935 (additional source)
Ptycholaimellus ponticus (Filipjev, 1922) Gerlach, 1955 (additional source)
Punctodora ratzeburgensis (Linstow, 1876) Filipjev, 1929 (additional source)
Sabatieria pulchra (Schneider, 1906) Riemann, 1970 (additional source)
Sphaerolaimus balticus Schneider, 1906 (additional source)
Theristus acer Bastian, 1865 (additional source)
Theristus pertenuis Schuurmans Stekhoven, 1935 (additional source)