Somniosus Lesueur, 1818
Gender: M; J. Acad. nat. Sci. Philad., 1: 222
Type: S. brevipinna Lesueur = Squalus microcephalus Schneider, by monotypy.
Synonyms
Laemargus Müller and Henle, 1837a, Ber. preuss. Akad. Wiss.: 116 (atypic) (type: Squalus borealis Fleming, 1828 = S. microcephalus Schneider, by subs. design. of Jordan, 1919: 192) as a sub-genus of Scymmys Cuvier.