Somalinautilus is a genus of nautiloids that is found in the Middle to Upper Jurassic of England, France, and Somaliland.

Another species of Nautilus was named in 1905, N. bisculatus, which is now a synonym of S.

[1] Two features that differentiate Somalinautilus are that the venter is arched and low, and its ventral shoulders are subangular.

This distinguishes Somalinautilus from its close relatives Paracenoceras, Tithonoceras, and Aulaconautilus.

Tithonoceras is closest related to Paracenoceras within the group, and the three other genera are all descended from the groups sister taxa.