| Nominal Species (n = 193) | Present allocation (n = 190) | Ref. |
|---|---|---|
| Metadesmolaimus aduncus Lorenzen, 1972 | Metadesmolaimus aduncus | 19 |
| Dactylaimus aequalis Cobb, 1920 | Dactylaimus aequalis | 19 |
| Monhystera africana Andrassy, 1964 | Monhystera africana | 19 |
| Diplolaimelloides altherri Meyl, 1954 | Diplolaimelloides altherri | 19 |
| Theristus ambronensis Schulz, 1936 | Theristus ambronensis | 19 |
| Steineria ampullacea Wieser & Hopper, 1967 | Steineria ampullacea | 19 |
| Monhystera ampullocauda Paramonov, 1926 | Monhystera ampullocauda | 19 |
| Monhystera andrassyi Biro, 1969 | Monhystera andrassyi | 19 |
| Monhystera anechma Southern, 1914 | Amphimonhystera anechma | 75097 |
| Monhystera annulifera Daday, 1905 | Monhystera annulifera | 19 |
| Theristus anteferens Wieser, 1956 | Pseudosteineria anteferens | 75097 |
| Theristus anticipans Wieser, 1956 | Pseudosteineria anticipans | 75097 |
| Filipjeva arctica Ditlevsen, 1928 | Filipjeva arctica | 19 |
| Diplolaimella ariakensis Shimada, 2021 | Diplolaimella ariakensis | 3477 |
| Monhystera attenuata Filipjev, 1922 | Monhystera attenuata | 19 |
| Monhystera barentsi Steiner, 1916 | Monhystera barentsi | 19 |
| Sphaerotheristus bengalensis Timm, 1968 | Sphaerotheristus bengalensis | 19 |
| Theristus biarcospiculum Timm | Theristus biarcospiculum | 19 |
| Paramonohystera biforma Wieser, 1956 | Paramonohystera biforma | 19 |
| Monhystera bipunctata Schneider, 1906 | Monhystera bipunctata | 19 |
| Monhystera bothriolaima Steiner, 1916 | Monhystera bothriolaima | 19 |
| Cylindrolaimus brachystoma Hofmanner, 1914 | Hofmaenneria brachystoma | 75097 |
| Longilaimus brachyuris Allgen, 1959 | Longilaimus brachyuris | 19 |
| Diplolaimelloides bruciei Hopper, 1970 | Diplolaimelloides bruciei | 19 |
| Theristus buetschlii Bresslau & Stekhove | Theristus buetschlii | 19 |
| Theristus calx Wieser & Hopper, 1967 | Theristus calx | 19 |
| Rhabditis cambari Allen, 1933 | Gammarinema cambari | 75097 |
| Monhystera cameroni Steiner, 1958 | Monhystera cameroni | 19 |
| Monhystera campbelli Allgen, 1929 | Monhystera campbelli | 19 |
| Paramonohystera canicula Wieser & Hopper, 1967 | Paramonohystera canicula | 19 |
| Monhystera capitata Stekhoven, 1942 | Monhystera capitata | 19 |
| Monhystera carcinicola Baylis, 1915 | Tripylium carcinicola | 75097 |
| Gammarinema cardisomae Riemann, 1968 | Gammarinema cardisomae | 19 |
| Odontobius ceti Roussel De Vanzeme, 1934 | Odontobius ceti | 19 |
| Diplolaimella chitwoodi Gerlach, 1957 | Diplolaimella chitwoodi | 19 |
| Monhystera chitwoodi Steiner, 1958 | Monhystera chitwoodi | 19 |
| Echinotheristus cimbricus Thun & Riemann, 1967 | Echinotheristus cimbricus | 19 |
| Omicronema clavulatum Gerlach, 1957 | Omicronema clavulatum | 19 |
| Monhystera collaris Filipjev, 1922 | Monhystera collaris | 19 |
| Monhystera conica Filipjev, 1922 | Monhystera conica | 19 |
| Spiramphinema convolutum Wieser, 1956 | Spiramphinema convolutum | 19 |
| Monhystera dadayi Goodey, 1963 | Monhystera dadayi | 19 |
| Cobbia dentata Gerlach, 1953 | Cobbia dentata | 19 |
| Monhystera denticulata Timm | Monhystera denticulata | 19 |
| Sitadevinema dentiferum Khera, 1971 | Sitadevinema dentiferum | 19 |
| Monhystera disjuncta Bastian, 1865 | Monhystera disjuncta | 19 |
| Monhystera dispar Bastian, 1865 | Monhystera dispar | 19 |
| Monhystera droebachiensis Allgen, 1931 | Monhystera droebachiensis | 19 |
| Monhystera dubicola Hopper & Meyers, 1967 | Monhystera dubicola | 19 |
| Monhystera elegans Allgen, 1928 | Monhystera elegans | 19 |
| Monhystera elegantula Stekhoven | Monhystera elegantula | 19 |
| Paramonohystera elliptica Filipjev, 1918 | Paramonohystera elliptica | 19 |
| Promonhystera faber Wieser, 1956 | Promonhystera faber | 19 |
| Monhystera fasciculata Skwarra, 1921 | Monhystera fasciculata | 19 |
| Monhystera filicaudata Allgen | Monhystera filicaudata | 19 |
| Longilaimus filicaudatus Allgen, 1958 | Longilaimus filicaudatus | 19 |
| Theristus fimbriatoides Chitwood & Murphy, 1964 | Wieserius fimbriatoides | 75097 |
| Theristus fistulatus Wieser & Hopper, 1967 | Cylindrotheristus fistulatus | 75097 |
| Elzalia floresi Gerlach, 1957 | Elzalia floresi | 19 |
| Theristus floridanus Wieser & Hopper, 1967 | Trichotheristus floridanus | 75097 |
| Monhystera fuelleborni Daday, 1908 | Monhystera fuelleborni | 19 |
| Theristus galeatus Wieser & Hopper, 1967 | Trichotheristus galeatus | 75097 |
| Gammarinema gammari Kinne & Gerlach, 1953 | Gammarinema gammari | 19 |
| Steineria gerlachi Wieser, 1959 | Steineria gerlachi | 19 |
| Monhystera gerlachii Meyl, 1954 | Monhystera gerlachii | 19 |
| Monhystera gracilicauda Stekhoven, 1950 | Monhystera gracilicauda | 19 |
| Monhystera gracilior Johnston, 1938 | Monhystera gracilior | 19 |
| Monhystrella gracilis Khera, 1966 | Monhystrella gracilis | 19 |
| Monhystera helvetica Steiner, 1914 | Monhystera helvetica | 19 |
| Halomonhystera hermesi Tchesunov, Portnova & van Campenhout, 2015 | Halomonhystera hermesi | 3477 |
| Monhystera heterolaima Stekhoven, 1950 | Monhystera heterolaima | 19 |
| Monhystera heteroparva Micoletzky, 1924 | Monhystera parva | 75097 |
| Monhystrium inquilinus Reimann, 1969 | Monhystrium inquilinus | 19 |
| Monhystera insignis Cobb, 1893 | Monhystera insignis | 19 |
| Monhystera islandica De Coninck, 1943 | Monhystera islandica | 19 |
| Monhystera izhorica Filipjev, 1929 | Monhystera izhorica | 19 |
| Monhystera karachiensis Timm, 1963 | Monhystera karachiensis | 19 |
| Monhystera labiata Daday, 1903 | Monhystera labiata | 19 |
| Metadesmolaimus labiosetosus Stekhoven, 1935 | Metadesmolaimus labiosetosus | 19 |
| Monhystera lemani Juget, 1969 | Monhystera lemani | 19 |
| Gammarinema ligiae Gerlach, 1967 | Gammarinema ligiae | 19 |
| Omicronema litorium Cobb, 1920 | Omicronema litorium | 19 |
| Monhystera longicapitata Filipjev, 1922 | Monhystera longicapitata | 19 |
| Monhystera longicaudata Bastian, 1865 | Monhystera longicaudata | 19 |
| Paramonohystera longicaudata Timm, 1963 | Paramonohystera longicaudata | 19 |
| Monhystera longissimecaudata Kreis, 1935 | Monhystera longissimecaudata | 19 |
| Monhystera longistoma Khera, 1971 | Monhystera longistoma | 19 |
| Monhystera macquariensis Allgen, 1929 | Monhystera macquariensis | 19 |
| Monhystera macramphis Filipjev, 1929 | Monhystera macramphis | 19 |
| Cobbia macrostoma Timm, 1963 | Sphaerotheristus macrostoma | 75097 |
| Monhystera macrura De Man, 1880 | Monhystera macrura | 19 |
| Monhystera magallanica Wieser, 1956 | Monhystera magallanica | 19 |
| Cobbia mawsoni Cobb, 1930 | Cobbia mawsoni | 19 |
| Elzalia mediterranea Vitiello, 1971 | Elzalia mediterranea | 19 |
| Monhystera megacephala Steiner, 1916 | Paramonohystera megacephala | 75097 |
| Amphimonhystrella megastoma Timm, 1961 | Amphimonhystrella megastoma | 19 |
| Filipjeva meridionalis Kreis, 1932 | Filipjeva meridionalis | 19 |
| Diplolaimelloides meyli Timm, 1961 | Diplolaimelloides meyli | 19 |
| Paramonohystera micramphis Stekhoven, 1950 | Paramonohystera micramphis | 19 |
| Monhystera microphthalma Deman | Monhystera microphthalma | 19 |
| Litotes minuta Cobb, 1920 | Litotes minuta | 19 |
| Monhystera minuta Filipjev, 1929 | Monhystera minuta | 19 |
| Steineria mirabilis Stekhoven & De Coninck, 1933 | Trichotheristus mirabilis | 75097 |
| Monhystera mwerazii Meyl, 1957 | Monhystera mwerazii | 19 |
| Cylindrolaimus niddensis Skwarra, 1921 | Hofmaenneria niddensis | 75097 |
| Omicronema nidrosiense Allgen, 1933 | Omicronema nidrosiense | 19 |
| Monhystera normandica De Man, 1890 | Cylindrotheristus normandicus | 75097 |
| Hieminema obliquorum Tchesunov & Portnova, 2005 | Hieminema obliquorum | 3477 |
| Monhystera ocellidecoris Hopper & Meyers, 1967 | Monhystera ocellidecoris | 19 |
| Diplolaimella ophthalmophora Timm, 1952 | Diplolaimella ophthalmophora | 19 |
| Theristus otoplanobius Gerlach | Theristus otoplanobius | 19 |
| Cylindrotheristus oxycercus Wieser | Cylindrotheristus oxycercus | 19 |
| Monhystera pachyuris Ditlevsen, 1928 | Monhystera pachyuris | 19 |
| Monhystera paludicola De Man, 1880 | Monhystera paludicola | 19 |
| Metadesmolaimus pandus Lorenzen, 1972 | Metadesmolaimus pandus | 19 |
| Monhystera papuana Daday, 1899 | Monhystera papuana | 19 |
| Monhystera paraambigua Allgen, 1933 | Monhystera paraambigua | 19 |
| Monhystera paraambiguoides Allgen, 1932 | Monhystera paraambiguoides | 19 |
| Monhystera paradisjuncta De Coninck, 1943 | Monhystera paradisjuncta | 19 |
| Theristus parambronensis Timm | Theristus parambronensis | 19 |
| Filipjeva parameridionalis Vitiello, 1970 | Filipjeva parameridionalis | 19 |
| Monhystera paramonovi Allgen, 1929 | Monhystera paramonovi | 19 |
| Theristus paranormandicus Timm, 1952 | Paramonohystera paranormandica | 75097 |
| Monhystera parasimplex De Coninck, 1943 | Monhystera parasimplex | 19 |
| Monhystera parasitica Penso, 1938 | Monhystera parasitica | 19 |
| Monhystera parvella Filipjev, 1931 | Monhystera parvella | 19 |
| Theristus parvulus Timm | Theristus parvulus | 19 |
| Tachyhodites parvus Bastain, 1865 | Monhystera parva | 75097 |
| Monhystera pellucida Cobb, 1920 | Paramonohystera pellucida | 75097 |
| Steineria phimifera Wieser, 1959 | Steineria phimifera | 19 |
| Monhystrella plectoides Cobb, 1918 | Monhystrella plectoides | 19 |
| Monhystera polychaeta Steiner, 1915 | Steineria polychaeta | 75097 |
| Theristus polychaetophilus Hopper, 1966 | Theristus polychaetophilus | 19 |
| Monhystera praevulvata Allgen, 1932 | Monhystera praevulvata | 19 |
| Monhystera pratensis Cobb, 1893 | Monhystera pratensis | 19 |
| Monhystera propinqua Daday, 1905 | Monhystera propinqua | 19 |
| Paramonohystera proteus Wieser, 1956 | Paramonohystera proteus | 19 |
| Monhystera psammophila Juget, 1969 | Monhystera psammophila | 19 |
| Monhystera pseudomacrura Khera, 1971 | Monhystera pseudomacrura | 19 |
| Diplolaimella punicea Timm | Diplolaimella punicea | 19 |
| Monhystera refringens Schuurmans Stekhoven, 1935 | Monhystera refringens | 3477 |
| Theristus rhynchonemoides Hopper, 1961 | Theristus rhynchonemoides | 19 |
| Monhystera rivularis Bastian, 1865 | Monhystera rivularis | 19 |
| Monhystera rotundicapitata Filipjev, 1922 | Monhystera rotundicapitata | 19 |
| Monhystera sabulicola Allgen, 1929 | Monhystera sabulicola | 19 |
| Diplolaimella schneideri Timm, 1952 | Diplolaimella ocellata | 75097 |
| Cobbia scutata Wieser, 1956 | Cobbia scutata | 19 |
| Monhystera sentiens Cobb, 1914 | Mesotheristus setosus | 75097 |
| Monhystera setosa Butschli, 1874 | Mesotheristus setosus | 75097 |
| Paramonohystera setosa Filipjev, 1918 | Paramonohystera setosa | 19 |
| Pulchranemella setosa Cobb, 1933 | Pulchranemella setosa | 19 |
| Monhystera similis Butschle, 1873 | Monhystera similis | 19 |
| Cobbia simplex Allgen, 1929 | Cobbia simplex | 19 |
| Monhystera simplex De Man, 1880 | Monhystera simplex | 19 |
| Monhystera socialis Butschli, 1874 | Monhystera socialis | 19 |
| Monhystera somereni Allgen, 1952 | Monhystera somereni | 19 |
| Megalolaimus speculifer Timm, 1961 | Elzalia speculifer | 75097 |
| Macramphis sphaerolaimoides Timm, 1961 | Megalamphis sphaerolaimoides | 75097 |
| Monhystera spiralis Wu & Hoeppli, 1926 | Monhystera spiralis | 19 |
| Austronema spirurum Cobb, 1914 | Austronema spirurum | 19 |
| Monhystera stagnalis Bastian, 1865 | Monhystera stagnalis | 19 |
| Diplolaimella stagnosa Lorenzen, 1966 | Diplolaimella stagnosa | 19 |
| Monhystera stewarti Khera, 1971 | Monhystera stewarti | 19 |
| Zygonemella striata Cobb, 1920 | Zygonemella striata | 19 |
| Xenolaimus striatus Cobb, 1920 | Xenolaimus striatus | 19 |
| Monhystera subfiliformis Cobb, 1918 | Monhystera subfiliformis | 19 |
| Monhystera subrustica Cobb, 1906 | Monhystera subrustica | 19 |
| Cenolaimus supersentiens Cobb, 1933 | Cenolaimus supersentiens | 19 |
| Sphaerotheristus supoti Timm, 1968 | Sphaerotheristus supoti | 19 |
| Monhystera tasmaniensis Allgen, 1927 | Monhystera tasmaniensis | 19 |
| Filipjeviella tenuis Allgen, 1959 | Elzalia tenuis | 75097 |
| Monhystera tenuis Stekhoven, 1950 | Monhystera tenuis | 19 |
| Monhystera tenuispiculum Ditlevsen, 1918 | Cylindrotheristus tenuispiculum | 75097 |
| Theristus tersus Gerlach, 1956 | Metadesmolaimus tersus | 75097 |
| Echinotheristus teutonicus Thun & Riemann, 1967 | Echinotheristus teutonicus | 19 |
| Monhystera thermophila Meyl, 1953 | Monhystera thermophila | 19 |
| Desmolaimus thienemanni Micoletzky, 1922 | Hofmaenneria brachystoma | 75097 |
| Monhystera tobagoensis Allgen, 1947 | Monhystera tobagoensis | 19 |
| Monhystrium transitans Cobb, 1920 | Monhystrium transitans | 19 |
| Cobbia trefusiaeformis De Man, 1907 | Cobbia trefusiaeformis | 19 |
| Monhystera trichura Allgen, 1930 | Monhystera trichura | 19 |
| Promonhystera tricuspidata Wieser, 1956 | Promonhystera tricuspidata | 19 |
| Monhystera tripyloides Abdrassy, 1968 | Monhystera tripyloides | 19 |
| Cobbia truncata Wieser, 1959 | Cobbia truncata | 19 |
| Omicronema truncatum Stekhoven, 1950 | Omicronema truncatum | 19 |
| Paramonohystera tschislenkoi Platonova, 1971 | Paramonohystera tschislenkoi | 19 |
| Monhystera uniformis Cobb, 1914 | Monhystera uniformis | 19 |
| Monhystera uria Stewart, 1914 | Monhystera uria | 19 |
| Cobbia urinator Wieser, 1959 | Cobbia urinator | 19 |
| Monhystera villosa Butschli, 1873 | Monhystera villosa | 19 |
| Gonionchus villosus Cobb, 1920 | Gonionchus villosus | 19 |
| Monhystera vulgaris De Man, 1880 | Monhystera vulgaris | 19 |
| Theristus wimmeri Wieser, 1959 | Theristus wimmeri | 19 |