| Nominal Species (n = 9) | Present allocation (n = 2) | Ref. |
|---|---|---|
| Contracaecum benimasu Fujita, 1932 | Hysterothylacium aduncum | 19 |
| Contracaecum crassicaudatum Fujita, 1939 | Hysterothylacium aduncum | 19 |
| Contracaecum elongatum Fujita, 1939 | Hysterothylacium aduncum | 19 |
| Contracaecum hippoglossi Fujita, 1932 | Hysterothylacium aduncum | 19 |
| Contracaecum hypomesi Fujita, 1932 | Hysterothylacium aduncum | 19 |
| Contracaecum longispiculum Fujita, 1940 | Hysterothylacium aduncum | 19 |
| Contracaecum ochotense Fujita, 1932 | Hysterothylacium aduncum | 19 |
| Contracaecum oshoroensis Fujita, 1940 | Hysterothylacium aduncum | 19 |
| Paranisakiopsis weddelliensis Rocka, 2002 | Paranisakiopsis weddelliensis | 3477 |