| Nominal Species (n = 42) | Present allocation (n = 42) | Ref. |
|---|---|---|
| Anelassorhynchus abyssalis Fisher, 1949 | Anelassorhynchus abyssalis | 19 |
| Echiurus abyssalis Skorikow, 1906 | Echiurus abyssalis | 19 |
| Anelassorhynchus adelaidensis Edmonds, 1960 | Anelassorhynchus adelaidensis | 19 |
| Thalassema antarcticum Stephen, 1941 | Thalassema antarcticum | 19 |
| Echiurus antarcticus Spengel, 1912 | Echiurus antarcticus | 19 |
| Thalassema arcassonense Cuénot, 1902 | Thalassema arcassonense | 19 |
| Thalassema brevipalpis Quatrefages, 1865 | Thalassema brevipalpis | 19 |
| Arhynchite californicus Fisher, 1949 | Arhynchite californicus | 19 |
| Ochetostoma capense Jones & Stephen, 1955 | Listriolobus capensis | 19 |
| Anelassorhynchus chaetiferus Datta Gupta, Menon & Johnson, 1963 | Anelassorhynchus chaetiferus | 19 |
| Thalassema diaphanes Sluiter, 1888 | Thalassema diaphanes | 19 |
| Lumbricus echiurus Pallas, 1767 | Echiurus echiurus | 429 |
| Thalassema elapsum Sluiter, 1912 | Thalassema elapsum | 19 |
| Lissomyema exilii Müller, 1883 | Lissomyema exilii | 19 |
| Anelassorhynchus fisheri Dapta Gupta, 1975 | Anelassorhynchus fisheri | 19 |
| Thalassema fuscum Ikeda, 1904 | Thalassema fuscum | 19 |
| Anelassorhynchus gangae Biseswar, 1984 | Anelassorhynchus gangae | 19 |
| Thalassema hartmani Fisher, 1947 | Thalassema hartmani | 19 |
| Arhynchite hiscocki Edmonds, 1960 | Arhynchite hiscocki | 19 |
| Arhynchite inamoenus Fisher, 1946 | Arhynchite inamoenus | 19 |
| Thalassema jenniferae Biseswar, 1988 | Thalassema jenniferae | 19 |
| Thalassema liliae Schaeffer, 1973 | Thalassema liliae | 19 |
| Anelassorhynchus loborhynchus Datta Gupta & Menon, 1965 | Anelassorhynchus loborhynchus | 538 |
| Thalassema malakhovi Popkov, 1992 | Thalassema malakhovi | 19 |
| Thalassema marshalli Prashad, 1935 | Thalassema marshalli | 19 |
| Thalassema mortenseni Fischer, 1923 | Thalassema mortenseni | 19 |
| Thalassema nepturi Geartner, 1774 | Thalassema thalassemum | 429 |
| Thalassema ochotica Pergament, 1961 | Thalassema ochotica | 19 |
| Thalassema ovatum Sluiter, 1902 | Thalassema ovatum | 19 |
| Thalassema owstoni Ikeda, 1904 | Thalassema owstoni | 19 |
| Arhynchite paulensis Amor, 1971 | Arhynchite paulensis | 19 |
| Thalassema peltzelnii Diesing, 1859 | Thalassema peltzelnii | 19 |
| Thalassema peronii Quatrefages, 1865 | Thalassema peronii | 19 |
| Thalassema philostracum Fisher, 1947 | Thalassema philostracum | 19 |
| Anelassorhynchus porcellus Fisher, 1948 | Anelassorhynchus porcellus | 19 |
| Arhynchite pugettensis Fisher, 1949 | Arhynchite pugettensis | 19 |
| Ikedosoma qingdaoense Li, Wang & Zhou, 1994 | Ikedosoma qingdaoense | 19 |
| Arhynchite rugosus Chen & Yeh, 1958 | Arhynchite rugosus | 19 |
| Thalassema steinbecki Fisher, 1946 | Thalassema steinbecki | 19 |
| Thalassema sydniense Edmonds, 1960 | Thalassema sydniense | 19 |
| Echiurus torulobotus Salvini-Plawen, 1972 | Echiurus torulobotus | 19 |
| Thalassema viride Verrill, 1879 | Thalassema viride | 19 |