| Nominal Species (n = 27) | Present allocation (n = 25) | Ref. |
|---|---|---|
| Dolicholaimus acutus Gerlach, 1953 | Trissonchulus acutus | 75097 |
| Ironus americanus Cobb, 1914 | Ironus americanus | 19 |
| Syringgolaimus benepapillosus Schulz, 1935 | Trissonchulus benepapillosus | 75097 |
| Thalassironus bisetosus Vitiello, 1970 | Thalassironus bisetosus | 19 |
| Thalassironus britannicus De Man, 1889 | Thalassironus britannicus | 19 |
| Ironella cobbi Timm, 1952 | Ironella cobbi | 19 |
| Ironus colourus Steiner, 1919 | Ironus colourus | 19 |
| Conilia divina Gerlach, 1956 | Conilia divina | 19 |
| Ironus filiformis Altherr, 1963 | Ironus macramphis | 75097 |
| Ironus helveticus Daday, 1911 | Ironus helveticus | 19 |
| Ironus ignavus Bastian, 1965 | Ironus ignavus | 19 |
| Trissonchulus janetae Inglis, 1961 | Trissonchulus janetae | 3477 |
| Thalassironus jungi Inglis, 1964 | Thalassironus jungi | 19 |
| Parironus keiensis Micoletzky, 1930 | Parironus keiensis | 19 |
| Trissonchulus littoralis Yeates, 1967 | Trissonchulus littoralis | 19 |
| Ironus longicaudatus De Man, 1884 | Ironus longicaudatus | 19 |
| Ironus luci Andrassy, 1956 | Ironus luci | 19 |
| Ironus macramphis Stekhoven & Teunissen, 1938 | Ironus macramphis | 19 |
| Trissonchulus oceanus Cobb, 1920 | Trissonchulus oceanus | 19 |
| Pheronous ogdeni Inglis, 1966 | Pheronous ogdeni | 19 |
| Ironus paludicola Schneider, 1937 | Ironus paludicola | 19 |
| Ironella prismatolaima Cobb, 1920 | Ironella prismatolaima | 19 |
| Trissonchulus quinquepapillatus Yeates, 1967 | Trissonchulus quinquepapillatus | 19 |
| Trissonchulus reversus Chitwood, 1951 | Trissonchulus reversus | 19 |
| Ironus rotundicaudatus Kreis, 1924 | Ironus rotundicaudatus | 19 |
| Ironus tenuicaudatus De Man, 1876 | Ironus tenuicaudatus | 19 |
| Ironus truncatus Stefanski, 1916 | Ironus americanus | 75097 |