| Nominal Species (n = 41) | Present allocation (n = 41) | Ref. |
|---|---|---|
| Microlaimus acuticaudatus Stekhoven & De Coninck, 1933 | Microlaimus acuticaudatus | 19 |
| Microlaimus affinis Gerlach, 1958 | Microlaimus affinis | 19 |
| Microlaimus alexandri Lima, Neres & Esteves, 2022 | Microlaimus alexandri | 3477 |
| Microlaimus allgeni Gerlach, 1950 | Microlaimus allgeni | 19 |
| Microlaimus arenicola Schulz, 1838 | Microlaimus arenicola | 19 |
| Microlaimus borealis Steiner, 1916 | Microlaimus borealis | 19 |
| Ungulilaimella bulbosa Allgen, 1958 | Ungulilaimella bulbosa | 19 |
| Microlaimus campiensis Lima, Neres & Esteves, 2022 | Microlaimus campiensis | 3477 |
| Microlaimus capillaris Gerlach, 1957 | Microlaimus capillaris | 19 |
| Microlaimus chitwoodi Gerlach, 1950 | Microlaimus chitwoodi | 19 |
| Microlaimus citrus Gerlach, 1959 | Microlaimus citrus | 19 |
| Microlaimus cochleatus Wieser, 1959 | Microlaimus cochleatus | 19 |
| Microlaimus compridus Gerlach, 1956 | Microlaimus compridus | 19 |
| Microlaimus crassiceps Gerlach, 1953 | Microlaimus crassiceps | 19 |
| Microlaimus criminalis Rieger & Ott, 1971 | Microlaimus criminalis | 19 |
| Microlaimus cyatholaimoides De Man, 1922 | Microlaimus cyatholaimoides | 19 |
| Microlaimus dentatus Allgen, 1935 | Microlaimus dentatus | 19 |
| Microlaimus dimorphus Chitwood, 1937 | Microlaimus dimorphus | 19 |
| Microlaimus dixiei Wieser, 1959 | Microlaimus dixiei | 19 |
| Prodesmodora fluviatilis Cobb, 1914 | Prodesmodora circulata | 75097 |
| Microlaimus gerlachi Wieser, 1954 | Microlaimus gerlachi | 19 |
| Microlaimus globiceps De Man, 1880 | Microlaimus globiceps | 19 |
| Microlaimus honestus De Man, 1922 | Microlaimus honestus | 19 |
| Bolbolaimus leptus Gagarin, Nguyen Vu Thanh, 2019 | Bolbolaimus leptus | 3477 |
| Microlaimus macrolaimus Allgen, 1947 | Microlaimus macrolaimus | 19 |
| Prodesmodora minuta Schneider, 1937 | Prodesmodora minuta | 19 |
| Aponema ninae Portnova, 2009 | Aponema ninae | 3477 |
| Bolbolaimus parvus Gagarin, Nguyen Vu Thanh, 2019 | Bolbolaimus parvus | 3477 |
| Paramicrolaimus primus Wieser, 1954 | Paramicrolaimus primus | 19 |
| Microlaimus problematicus Allgen, 1932 | Microlaimus problematicus | 19 |
| Aponema pseudotorosum Fu & Leduc, 2019 | Aponema pseudotorosum | 3477 |
| Microlaimus pygmaeus Meyl, 1954 | Microlaimus pygmaeus | 19 |
| Microlaimus sergeevae Revkova, 2020 | Microlaimus sergeevae | 3477 |
| Microlaimus setosus Hoeppli, 1926 | Microlaimus setosus | 19 |
| Paramicrolaimus spirulifer Wieser, 1959 | Paramicrolaimus spirulifer | 19 |
| Molgolaimus tenuispiculum Ditlevsen, 1921 | Molgolaimus tenuispiculum | 19 |
| Prodesmodora terricola Altherr, 1952 | Prodesmodora terricola | 19 |
| Microlaimus texianus Chitwood, 1951 | Microlaimus texianus | 19 |
| Microlaimus vitorius Lima, Neres & Esteves, 2022 | Microlaimus vitorius | 3477 |
| Prodesmodora wolgensis Micoletzky, 1923 | Prodesmodora wolgensis | 19 |
| Microlaimus zosterae Allgen, 1930 | Microlaimus zosterae | 19 |