| Nematonereis unicornis Schmarda, 1861 |
| Nicidion Kinberg, 1865 |
| Nicidion angeli (Carrera-Parra & Salazar-Vallejo, 1998) |
| Nicidion brevis Ehlers, 1887 |
| Nicidion cariboea (Grube, 1856) |
| Nicidion imogena Monro, 1924 |
| Nicidion kinbergi Webster, 1884 |
| Nicidion mutilata (Webster, 1884) |
| Nicidion obtusa (Verrill, 1900) |
| Palola J.E. Gray, 1847 |
| Palola paloloides (Moore, 1909) |
| Palola siciliensis (Grube, 1840) |
| Paraeuniphysa Wu & He, 1988 |
| Paraeuniphysa tridontesa (Shen & Wu, 1991) |
| Paramarphysa Ehlers, 1887 |
| Paramarphysa longula Ehlers, 1887 |
| Paramarphysa obtusa Verrill, 1900 |
| Treadwellphysa Molina-Acevedo & Carrera-Parra, 2017 |
| Treadwellphysa veracruzensis (de León-González & Díaz-Castañeda, 2006) |