Adoncholaimus thalassophygas (de Man, 1876) Filipjev, 1918 (additional source)
Anoplostoma viviparum (Bastian, 1865) Bütschli, 1874 (additional source)
Axonolaimus spinosus (Bütschli, 1874) de Man, 1889 (additional source)
Chromadora macrolaima de Man, 1889 (additional source)
Enoplolaimus balgensis Skwarra, 1921 (additional source)
Hypodontolaimus balticus (G. Schneider, 1906) Filipjev, 1918 (additional source)
Microlaimus globiceps de Man, 1880 (additional source)
Monhystera filiformis Bastian, 1865 accepted as Eumonhystera filiformis (Bastian, 1865) Andrássy, 1981 (additional source)
Monhystera microphthalma de Man, 1880 accepted as Monhystrella microphthalma (de Man, 1880) Jacobs, 1987 (additional source)
Oncholaimus oxyuris Ditlevsen, 1911 (additional source)
Paracyatholaimus dubiosus (Bütschli, 1874) Micoletzky, 1922 (additional source)
Paracyatholaimus intermedius (de Man, 1880) Micoletzky, 1922 (additional source)
Sphaerolaimus balticus Schneider, 1906 (additional source)
Sphaerolaimus gracilis de Man, 1876 (additional source)
Sphaerolaimus hirsutus Bastian, 1865 (additional source)
Tripyloides marinus (Bütschli, 1874) de Man, 1886 (additional source)
Viscosia viscosa (Bastian, 1865) de Man, 1890 (additional source)