| Mooreonuphis stigmatis (Treadwell, 1922) |
| Northia G. Johnston, 1865 |
| Northia elegans Johnson, 1901 |
| Northia geophiliformis Moore, 1903 |
| Northia iridescens Johnson, 1901 |
| Nothria Malmgren, 1867 |
| Nothria abyssalis Fauchald, 1968 |
| Nothria atlantisa Hartman, 1965 |
| Nothria cirrata (Hartman, 1944) |
| Nothria conchylega (Sars, 1835) |
| Nothria conchylega subsp. occidentalis Fauchald, 1968 |
| Nothria elegans (Johnson, 1901) |
| Nothria geophiliformis (Moore, 1903) |
| Nothria guadalupensis Fauchald, 1968 |
| Nothria hartmani Kirkegaard, 1980 |
| Nothria hiatidentata Moore, 1911 |
| Nothria iridescens (Johnson, 1901) |
| Nothria mexicana Fauchald, 1968 |
| Nothria occidentalis Fauchald, 1968 |
| Nothria pallidula Hartman, 1965 |