| Nominal Species (n = 51) | Present allocation (n = 38) | Ref. |
|---|---|---|
| Dysomma abyssale Kamohara, 1938 | Meadia abyssalis | 33390 |
| Synaphobranchus affinis Günther, 1877 | Synaphobranchus affinis | 5235 |
| Dysomma anguillare Barnard, 1923 | Dysomma anguillare | 3973 |
| Ilyophis arx Robins, 1976 | Ilyophis arx | 26895 |
| Synaphobranchus australis (non Regan, 1913) | Histiobranchus bathybius | 46206 |
| Synaphobranchus australis Regan, 1913 | Histiobranchus australis | 31334 |
| Synaphobranchus bathybius Günther, 1877 | Histiobranchus bathybius | 31334 |
| Synaphobranchus bathybius (non Günther, 1877) | Histiobranchus australis | 31334 |
| Ilyophis blachei Saldanha & Merrett, 1982 | Ilyophis blachei | 26895 |
| Synaphobranchus brachysomus Gilbert, 1905 | Synaphobranchus affinis | 5235 |
| Synaphobranchus brevidorsalis Günther, 1887 | Synaphobranchus brevidorsalis | 13608 |
| Nettastoma brevirostre Facciolà, 1887 | Dysomma brevirostre | 5235 |
| Ilyophis brunneus Gilbert, 1891 | Ilyophis brunneus | 39639 |
| Histiobranchus bruuni Castle, 1964 | Histiobranchus bruuni | 31334 |
| Dysomma bucephalus Alcock, 1889 | Dysomma bucephalus | 39639 |
| Synaphobranchus calvus Melo, 2007 | Synaphobranchus calvus | 75762 |
| Diastobranchus capensis Barnard, 1923 | Diastobranchus capensis | 5167 |
| Synaphobranchus danae Bruun, 1937 | Diastobranchus capensis | 5167 |
| Simenchelys dofleini Franz, 1910 | Simenchelys parasitica | 5235 |
| Leptocephalus dolichorhynchus Lea, 1913 | Synaphobranchus dolichorhynchus | 46206 |
| Dysomma dolichosomatum Karrer, 1983 | Dysomma dolichosomatum | 39639 |
| Dysomma fuscoventralis Karrer & Klausewitz, 1982 | Dysomma fuscoventralis | 9942 |
| Dysomma goslinei Robins & Robins, 1976 | Dysomma goslinei | 39639 |
| Conchognathus grimaldii Collett, 1889 | Simenchelys parasitica | 5235 |
| Histiobranchus infernalis Gill, 1883 | Histiobranchus bathybius | 31334 |
| Synaphobranchus kaupii Johnson, 1862 | Synaphobranchus kaupii | 5235 |
| Gymnosimenchelys leptosomus Tanaka, 1908 | Simenchelys parasitica | 5235 |
| Dysomma longirostrum Chen & Mok, 2001 | Dysomma longirostrum | 39632 |
| Dysomma melanurum Chen & Weng, 1967 | Dysomma melanurum | 39639 |
| Dysommopsis muciparus Alcock, 1891 | Dysomma muciparus | 36656 |
| Linkenchelys multipora Smith, 1989 | Linkenchelys multipora | 46206 |
| Thermobiotes mytilogeiton Geistdoerfer, 1991 | Thermobiotes mytilogeiton | 40873 |
| Ilyophis nigeli Shcherbachev & Sulak, 1997 | Ilyophis nigeli | 26895 |
| Dysomma opisthoproctus Chen & Mok, 1995 | Dysomma opisthoproctus | 31561 |
| Synaphobranchus oregoni Castle, 1960 | Synaphobranchus oregoni | 26895 |
| Simenchelys parasitica Gill, 1879 | Simenchelys parasitica | 26895 |
| Atractodenchelys phrix Robins & Robins, 1970 | Atractodenchelys phrix | 46206 |
| Synaphobranchus pinnatus var. brevidorsalis Lloyd, 1909 | Synaphobranchus brevidorsalis | 12965 |
| Dysomma polycatodon Karrer, 1983 | Dysomma polycatodon | 39639 |
| Leptocephalus proboscideus Lea, 1913 | Dysommina proboscideus | 46206 |
| Nettophichthys retropinnatus Holt, 1891 | Synaphobranchus kaupii | 5235 |
| Ilyophis robinsae Sulak & Shcherbachev, 1997 | Ilyophis robinsae | 26895 |
| Atractodenchelys robinsorum Karmovskaya, 2003 | Atractodenchelys robinsorum | 56787 |
| Meadia roseni Mok, Lee & Chan, 1991 | Meadia roseni | 31449 |
| Dysommina rugosa Ginsburg, 1951 | Dysommina rugosa | 13608 |
| Ilyophis saldanhai Karmovskaya & Parin, 1999 | Ilyophis saldanhai | 46206 |
| Synaphobranchus taketae Tanaka, 1916 | Synaphobranchus affinis | 5235 |
| Leptocephalus telescopicus Schmidt, 1913 | Dysomma brevirostre | 5235 |
| Haptenchelys texis Robins & Martin, 1976 | Haptenchelys texis | 26895 |
| Dysomma tridens Robins, Böhlke & Robins, 1989 | Dysomma tridens | 36656 |
| Dysomma zanzibarensis Norman, 1939 | Dysomma anguillare | 12965 |