Somalinautilus is a genus of nautiloids that is found in the Middle to Upper Jurassic of England, France, and Somaliland. The genus contains three species, S. antiquus, first assigned to Nautilus by Dacque in 1910, S. fuscus, first assigned to Nautilus in 1898, and S. clausus, first used under Nautilus in 1890. Another species of Nautilus was named in 1905, N. bisculatus, which is now a synonym of S. antiquus.