| Nothria pycnobranchiata McIntosh, 1885 |
| Nothria pygidialis Fauchald, 1968 |
| Nothria quadricuspis Sars, 1872 |
| Nothria rubescens (Augener, 1906) |
| Nothria setosa (Kinberg, 1865) |
| Nothria similis Fauchald, 1968 |
| Nothria sombreriana McIntosh, 1885 |
| Nothria stigmatis (Treadwell, 1922) |
| Nothria stigmatis subsp. cirrata Hartman, 1944 |
| Nothria textor Hartman & Fauchald, 1971 |
| Nothria vibex Fauchald, 1972 |
| Onuphidae Kinberg, 1865 |
| Onuphis Audouin & H. Milne-Edwards, 1833 |
| Onuphis (Nothria) Malmgren, 1867 |
| Onuphis (Nothria) dangrigae Fauchald, 1980 |
| Onuphis (Nothria) stigmatis Treadwell, 1922 |
| Onuphis (Onuphis) Audouin & H. Milne-Edwards, 1833 |
| Onuphis (Onuphis) difficilis Fauchald, 1982 |
| Onuphis (Onuphis) geminata Fauchald, 1980 |
| Onuphis (Onuphis) orensanzi Fauchald, 1982 |