| Valid name | Somniosus |
| Synonym | Type: S. brevipinna Lesueur = Squalus microcephalus Schneider, by monotypy. |
| Synonym | Gender: M; J. Acad. nat. Sci. Philad., 1: 222 |
| Synonym | Somniosus Lesueur, 1818 |
| Synonym | Laemargus Müller and Henle, 1837a, Ber. preuss. Akad. Wiss.: 116 (atypic) (type: Squalus borealis Fleming, 1828 = |