• Anomonema deconincki Jensen, 1976
• Antomicron elegans (de Man, 1922) De Coninck, 1965
• Antomicron pellucidum Cobb, 1920
• Antomicron pratense Lorenzen, 1966
• Antomicron profundum Vitiello, 1971
• Halaphanolaimus harpaga Boucher & de Bovée, 1972 accepted as Leptolaimus harpaga (Boucher & de Bovée, 1972) Holovachov & Boström, 2013
• Halaphanolaimus longisetosus Allgén, 1928 (uncertain > taxon inquirendum)
• Halaphanolaimus minutus Schuurmans Stekhoven, 1942 accepted as Leptolaimus minutus (Schuurmans Stekhoven, 1942) Holovachov & Boström, 2013
• Halaphanolaimus pellucidus Southern, 1914 accepted as Leptolaimus pellucidus (Southern, 1914) Holovachov & Boström, 2013
• Leptolaimoides haploopis Jensen, 1978
• Leptolaimoides thermastris (Lorenzen, 1966) Vitiello, 1971
• Leptolaimoides tubulosus Vitiello, 1971
• Leptolaimus acicula Lorenzen, 1966
• Leptolaimus alatus Vitiello, 1971
• Leptolaimus ampullaceus Warwick, 1970
• Leptolaimus cupulatus Lorenzen, 1972
• Leptolaimus ditlevseni (Steiner, 1916) De Coninck, 1965
• Leptolaimus elegans (Stekhoven & De Coninck, 1933) Gerlach, 1958
• Leptolaimus harpaga (Boucher & de Bovée, 1972) Holovachov & Boström, 2013
• Leptolaimus leptaleus Lorenzen, 1972
• Leptolaimus limicolus Lorenzen, 1972
• Leptolaimus longiseta (Allgén, 1934) De Coninck, 1965 (uncertain > taxon inquirendum)
• Leptolaimus luridus Timm, 1963
• Leptolaimus macer Lorenzen, 1972
• Leptolaimus membranatus (Wieser, 1951) De Coninck, 1965
• Leptolaimus minutus (Schuurmans Stekhoven, 1942) Holovachov & Boström, 2013 (uncertain > taxon inquirendum)
• Leptolaimus minutus Vitiello, 1971 accepted as Leptolaimus vitielloi Holovachov & Boström, 2013
• Leptolaimus mixtus Lorenzen, 1972
• Leptolaimus nobilis Gerlach, 1956
• Leptolaimus papilliger de Man, 1876
• Leptolaimus pellucidus (Southern, 1914) Holovachov & Boström, 2013
• Leptolaimus pocillus de Bovée, 1974
• Leptolaimus puccinelliae Gerlach, 1959
• Leptolaimus pumicosus Vitiello, 1971
• Leptolaimus scotlandicus Jayasree & Warwick, 1977
• Leptolaimus setiger Schuurmans Stekhoven & De Coninck, 1933
• Leptolaimus steineri (Filipjev, 1922) De Coninck, 1965 (uncertain > taxon inquirendum)
• Leptolaimus tenuis Gerlach, 1956 (uncertain > taxon inquirendum)
• Leptolaimus timmi Vitiello, 1971 accepted as Rhadinema timmi (Vitiello, 1971) Holovachov & Boström, 2014
• Leptolaimus trichodes (Kreis, 1929) De Coninck, 1965 (uncertain > taxon inquirendum)
• Leptolaimus tritubulatus Boucher & Helléouët, 1977
• Leptolaimus venustus Lorenzen, 1972
• Leptolaimus vinnulus Vitiello, 1974
• Leptolaimus vitielloi Holovachov & Boström, 2013
• Manunema annulatum (Vitiello & De Coninck, 1968)
• Manunema proboscidis Gerlach, 1957
• Paraplectonema pedunculatum (Hofmänner, 1913) Strand, 1934