| Nominal Species (n = 92) | Present allocation (n = 89) | Ref. |
|---|---|---|
| Longicyatholaimus annae Wieser & Hopper, 1967 | Marilynia annae | 75097 |
| Paracanthonchus arcospiculum Allgen, 1959 | Paracanthonchus arcospiculum | 19 |
| Paracyatholaimus arcticus Kreis, 1963 | Paracyatholaimus arcticus | 19 |
| Nannolaimus armatus Gerlach, 1964 | Nannolaimoides armatus | 75097 |
| Paracanthonchus barka Inglis, 1962 | Paracanthonchus barka | 19 |
| Paracanthonchus brachyuris Allgen, 1951 | Paracanthonchus brachyuris | 19 |
| Paracanthonchus caecus Micoletzky | Paracanthonchus caecus | 19 |
| Seuratiella californica Allgen, 1947 | Acanthonchus californicus | 75097 |
| Cyatholaimus canariensis Steiner, 1921 | Cyatholaimus canariensis | 19 |
| Neotonchus chamberlaini Wieser & Hopper, 1966 | Neotonchus chamberlaini | 19 |
| Paracyatholaimus chilensis Gerlach, 1953 | Paracyatholaimus chilensis | 19 |
| Acanthonchus cobbi Chitwood, 1951 | Acanthonchus cobbi | 19 |
| Paracanthonchus cochlearis Gerlach, 1957 | Paracanthonchus cochlearis | 19 |
| Biarmifer cochleatus Wieser, 1954 | Biarmifer cochleatus | 19 |
| Dentatonema crassum Kreis, 1928 | Dentatonema crassum | 19 |
| Neotonchus cupulatus Vitiello, 1970 | Neotonchus cupulatus | 19 |
| Praeacanthonchus cygnis Inglis, 1970 | Praeacanthonchus cygnis | 19 |
| Nannolaimoides decoratus Ott, 1972 | Nannolaimoides decoratus | 19 |
| Cyatholaimus dentatus Wieser, 1959 | Phyllolaimus dentatus | 75097 |
| Cyatholaimus dubiosus Butschli, 1874 | Paracyatholaimus dubiosus | 75097 |
| Seratiella duplex Allgen, 1947 | Acanthonchus duplex | 75097 |
| Acanthonchus duplicatus Wieser, 1959 | Acanthonchus duplicatus | 19 |
| Paracyatholaimus duplicatus Gerlach, 1964 | Paracyatholaimus duplicatus | 19 |
| Marilynia eratos Hopper, 1972 | Marilynia eratos | 19 |
| Gomphionema fellator Wieser & Hopper, 1966 | Gomphionema fellator | 19 |
| Neotonchus filiformis Warwick, 1971 | Neotonchus filiformis | 19 |
| Xyzzors fitzgeraldae Inglis, 1963 | Xyzzors fitzgeraldae | 19 |
| Propomponema foeticolum Ott, 1972 | Propomponema foeticolum | 19 |
| Seuratia gracilis Ditlevsen, 1918 | Acanthonchus gracilis | 75097 |
| Nannolaimus guttatus Cobb, 1920 | Nannolaimus guttatus | 19 |
| Parapomponema hastatum Ott, 1972 | Parapomponema hastatum | 19 |
| Paracanthonchus hawaiiensis Allgen, 1951 | Paracanthonchus hawaiiensis | 19 |
| Metacyatholaimus hirschi Stekhoven, 1942 | Metacyatholaimus hirschi | 19 |
| Xyzzors inglisi Wieser & Hopper, 1967 | Xyzzors inglisi | 19 |
| Neotonchus interruptus Warwick, 1971 | Neotonchus interruptus | 19 |
| Xyzzors iubatus Ott, 1972 | Xyzzors iubatus | 19 |
| Paracyatholaimoides labiosetosus Riemann, 1966 | Paracyatholaimoides labiosetosus | 19 |
| Biarmifer laminatus Wieser, 1954 | Biarmifer laminatus | 19 |
| Anaxonchiym litorium Cobb, 1920 | Pomponema litorium | 75097 |
| Achromadora longicauda Schneider, 1937 | Achromadora longicauda | 19 |
| Longicyatholaimus longicaudatus De Man, 1876 | Longicyatholaimus longicaudatus | 19 |
| Achromadora longiseta Stekhoven, 1951 | Achromadora longiseta | 19 |
| Paracanthonchus longus Allgen, 1934 | Paracanthonchus longus | 19 |
| Choniolaimus macrodentatus Wieser, 1959 | Marilynia macrodentata | 75097 |
| Heterocyatholaimus macrolaimus Allgen, 1935 | Heterocyatholaimus macrolaimus | 19 |
| Parapomponema macrospirale Ott, 1972 | Parapomponema macrospirale | 19 |
| Longicyatholaimus marilyniae Hopper, 1972 | Longicyatholaimus marilyniae | 19 |
| Paralongicyatholaimus mastigodes Stekhoven, 1950 | Paralongicyatholaimus mastigodes | 19 |
| Neotonchus meeki Warwick, 1971 | Neotonchus meeki | 19 |
| Neotonchus melotridus Wieser & Hopper, 1966 | Neotonchus melotridus | 19 |
| Pomponema mirabile Cobb, 1917 | Pomponema mirabile | 19 |
| Paracyatholaimoides multispiralis Gerlach, 1953 | Paracyatholaimoides multispiralis | 19 |
| Halichoanolaimus obtusicaudatus Schulz, 1935 | Choanolaimus psammophilus | 75097 |
| Cyatholaimus ocellatus Bastian, 1965 | Cyatholaimus ocellatus | 19 |
| Kraspedonema octogoniatum Gerlach, 1954 | Craspodema octogoniata | 75097 |
| Marilynia oculissoma Hopper, 1972 | Marilynia oculissoma | 19 |
| Paracyatholaimus paucipapillatus Gerlach, 1955 | Paracyatholaimus paucipapillatus | 19 |
| Seuratiella pedroensis Allgen, 1947 | Acanthonchus viviparus | 75097 |
| Paracyatholaimus pentodon Reimann, 1966 | Paracyatholaimus pentodon | 19 |
| Paracyatholaimus pesavis Wieser & Hopper, 1967 | Paracyatholaimus pesavis | 19 |
| Neotonchus phaleratus Wieser & Hopper, 1966 | Neotonchus phaleratus | 19 |
| Pomponema polydontus Murphy, 1963 | Pomponema polydontus | 19 |
| Marilynia preclara Hopper, 1972 | Marilynia preclara | 19 |
| Chromadora problematica Ditlevsen, 1918 | Boreomicrolaimoides problematicus | 75097 |
| Choanolaimus psammophilus De Man, 1880 | Choanolaimus psammophilus | 19 |
| Neotonchus pseudocorcundus Vitiello, 1971 | Neotonchus pseudocorcundus | 19 |
| Dispira punctata Cobb, 1933 | Dispira punctata | 19 |
| Cyantholaimus punctatus Bastian, 1865 | Praeacanthonchus punctatus | 75097 |
| Neotonchus punctatus Cobb, 1933 | Neotonchus punctatus | 19 |
| Metachoniolaimus pustulosus Stekhoven, 1950 | Metacyatholaimus hirschi | 75097 |
| Longicyatholaimus quadriseta Weiser, 1954 | Marilynia quadriseta | 75097 |
| Craspodema reflectans Gerlach, 1964 | Craspodema reflectans | 19 |
| Acanthonchus rostratus Wieser, 1959 | Acanthonchus rostratus | 19 |
| Paracyatholaimus rotundus Gerlach, 1964 | Paracyatholaimus rotundus | 19 |
| Pomponema segregatum Wieser, 1959 | Pomponema segregatum | 19 |
| Achromadora semiarmata Altherr, 1952 | Achromadora semiarmata | 19 |
| Paracyatholaimoides serpens Gerlach, 1957 | Paracyatholaimoides serpens | 19 |
| Metacyatholaimus spatiosus Wieser, 1954 | Metacyatholaimus spatiosus | 19 |
| Achromadora subdubia Gagarin, 1971 | Achromadora subdubia | 19 |
| Cyatholaimus tautraense Allgen, 1933 | Pomponema tautraense | 75097 |
| Micracanthonchus tenuicaudatus Allgen, 1959 | Micracanthonchus tenuicaudatus | 19 |
| Longicyatholaimus trichocauda Gerlach, 1955 | Longicyatholaimus trichocauda | 19 |
| Phyllolaimus tridentatus Murphy, 1963 | Phyllolaimus tridentatus | 19 |
| Dispirella truncata Cobb, 1933 | Dispirella truncata | 19 |
| Cyatholaimus truncatus Cobb, 1914 | Paracyatholaimus truncatus | 75097 |
| Gomphionema typicum Wieser Asd Hopper, 1966 | Gomphionema typicum | 19 |
| Paracyatholaimus tyrrhenicus Brunetti, 1949 | Paracanthonchus tyrrhenicus | 75097 |
| Cyatholaimus unalaskensis Allgen, 1957 | Cyatholaimus unalaskensis | 19 |
| Neotonchus vitius Warwick, 1971 | Neotonchus vitius | 19 |
| Paracyatholaimus vitraeus Gerlach, 1957 | Paracyatholaimus vitraeus | 19 |
| Acanthonchus viviparus Cobb, 1920 | Acanthonchus viviparus | 19 |
| Nannolaimus volutus Gerlach, 1956 | Nannolaimus volutus | 19 |