• Acmaeolaimus diplopeltoides Filipjev, 1918
• Actarjania lepida Vitiello, 1976
• Actarjania pomarei Boucher, 1973
• Actarjania splendens Hopper, 1967
• Adelonema camerunense Holovachov & Sturhan, 2003 accepted as Novadelonema camerunense (Holovachov & Sturhan, 2003)
• Aequalodontium gemellum Smolanko & Belogurov, 1993
• Allgenia kornoeensis (Allgen, 1929)
• Allomonhystera tripapillata Micoletzky, 1923 accepted as Daptonema setosus Bütschli, 1874
• Ammotheristus helgolandicus Riemann, 1967
• Ammotheristus subtilis (Lorenzen, 1972)
• Amphimonhystera anechma (Southern, 1914)
• Amphimonhystera bella Bussau, 1993
• Amphimonhystera circula Guo & Warwick, 2001
• Amphimonhystera galea Fadeeva, 1984
• Amphimonhystera helgolandica Riemann, 1967
• Amphimonhystera marisalbi Tchesunov & Mokievsky, 2005
• Amphimonhystera molloyensis Tchesunov & Mokievsky, 2005
• Amphimonhystera pallida Tchesunov & Mokievsky, 2005
• Amphimonhystera paranechma Allgén, 1935
• Amphimonhystera subtilis Lorenzen, 1972
• Amphimonhystrella bullacauda Tchesunov & Miljutina, 2005
• Amphimonhystrella megastoma Timm, 1961
• Amphimonhystrella parva Gagarin & Thanh, 2009
• Amphimonhystrella unita Lorenzen, 1977
• Anguimonhystera ampliceps Goffart, 1950
• Anguimonhystera stadleri Goffart, 1950
• Anguimonhystera tenuissima Goffart, 1950
• Anplostoma spinosum Butschli, 1874 accepted as Axonolaimus spinosus (Bütschli, 1874)
• Anthraconema sagax Strassen, 1904 accepted as Siphonolaimus niger de Man, 1893
• Anthraconema weismanni Zur Strassen, 1904 accepted as Siphonolaimus weismanni (Zur Strassen, 1904)
• Anticyathus boreicaspius Chesunov, 1978
• Anticyathus plicibucca Chesunov & Yushin, 1991
• Anticyathus primitivus (Allgén, 1933)
• Anticyathus septentrionalis (Cobb, 1914)
• Anticyathus tenuicaudatus Cobb, 1920
• Anticyathus trochus (Gerlach, 1957)
• Anticyclus cylindricus Murphy, 1965
• Anticyclus dubius Timm, 1961
• Anticyclus exilis Cobb, 1920
• Anticyclus gigas Vitiello, 1969
• Anticyclus iniquus Wieser, 1956
• Anticyclus junctus Gerlach, 1963
• Anticyclus pachyamphis (Wieser, 1956)
• Anticyclus pachyamphus (Wieser, 1956)
• Anticyclus tridonta Murphy, 1965
• Apodontium bellum Smolanko & Belogurov, 1993
• Apodontium pacificum Cobb, 1920
• Apodontium procerus Gerlach, 1957
• Aponcholaimus linhomoeoides Allgén, 1957
• Arabanema pakistanensis Turpeenniemi, Nasira & Maqbool, 2001
• Araeolaimoides botula Wieser, 1959 accepted as Diplopeltula botula (Wieser, 1959)
• Araeolaimoides botulus Wieser, 1959 accepted as Diplopeltula botula (Wieser, 1959)
• Araeolaimoides caecus Micoletzky, 1924
• Araeolaimoides demani accepted as Araeolaimus demani (Schuurmans Stekhoven, 1950)
• Araeolaimoides leptopharynx Bresslau & Stekhoven in Stekhoven, 1935 accepted as Araeolaimus leptopharynx
• Araeolaimoides microphthalmus de Man, 1893
• Araeolaimoides ovalis Wieser, 1951
• Araeolaimoides paucisetosus Wieser, 1951
• Araeolaimus australis Allgén, 1959
• Araeolaimus bioculatus (de Man, 1876)
• Araeolaimus boomerangifer Wieser, 1959
• Araeolaimus cobbi (Steiner, 1916)
• Araeolaimus cobbioides Allgén, 1933 accepted as Onchium ocellatum Cobb, 1920
• Araeolaimus conicaudatus Allgén, 1959
• Araeolaimus cylindrocauda Allgén, 1929 accepted as Araeolaimus longicauda Allgén, 1929
• Araeolaimus cylindrolaimus Chitwood, 1936 accepted as Southerniella cylindrolaimus (Chhitwood, 1936)
• Araeolaimus demani (Schuurmans Stekhoven, 1950)
• Araeolaimus ditlevseni Allgén, 1932
• Araeolaimus dolichoposthius Ssaweljev, 1912
• Araeolaimus dubiosus Allgén, 1959
• Araeolaimus dubius
• Araeolaimus elegans (De Man, 1888)
• Araeolaimus elegans Steiner, 1916 accepted as Araeolaimus steineri Filipjev, 1922
• Araeolaimus filipjevi Schuurmans Stekhoven & Adam, 1931
• Araeolaimus gajevskii Paramonov, 1929
• Araeolaimus gisleni Wieser, 1956
• Araeolaimus hawaiiensis Allgén, 1951 accepted as Onchium hawaiiense (Allgen, 1951)
• Araeolaimus ingoeyensis Allgén, 1940 accepted as Araeolaimus steineri Filipjev, 1922
• Araeolaimus ingoyensis Allgén, 1940
• Araeolaimus laqueifer Wieser, 1956
• Araeolaimus leptopharynx
• Araeolaimus longicauda Allgén, 1929
• Araeolaimus longisetosus Wieser, 1954
• Araeolaimus macrocirculus Kreis, 1928
• Araeolaimus mediterraneus (de Man, 1876)
• Araeolaimus microphtalmus de Man, 1893 accepted as Araeolaimus microphthalmus (de Man, 1893) accepted as Araeolaimoides microphthalmus de Man, 1893
• Araeolaimus microphthalmus (de Man, 1893) accepted as Araeolaimoides microphthalmus de Man, 1893
• Araeolaimus nudus Gerlach, 1951 accepted as Pararaeolaimus nudus (Gerlach, 1951)
• Araeolaimus obtusicaudatus Allgén, 1959
• Araeolaimus ovalis Wieser, 1956
• Araeolaimus oxystomaeoides
• Araeolaimus paracilyndricaudus Allgén, 1959
• Araeolaimus paracylindricauda Allgén, 1959
• Araeolaimus paradubiosus Allgén, 1959
• Araeolaimus parvibulbosus Platonova, 1971
• Araeolaimus paucisetosus (Wieser, 1951)
• Araeolaimus penelope Moore, 1977
• Araeolaimus ponticus Filipjev, 1922
• Araeolaimus propinquus Allgén, 1947
• Araeolaimus punctatus Gerlach, 1953