Sowerby II, 1855 Cerithium (Thericium) mysterium Hedley, 1917 Cerithium filosum G.B.

Sowerby II, 1865 Cerithium mysterium Hedley, 1917 Cerithium novaehiberniae A. Adams in G.B.

Sowerby II, 1855 Cerithium tenuifilosum G.B.

Sowerby II, 1866 Cerithium tomlini Hedley, 1914 Cerithium tenellum is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.

[1] The distribution of Cerithium tenellum includes the Western Central Pacific.