Mikadotrochus salmianus, common name the Salmiana slit shell, is a species of large sea snail, a marine gastropod mollusk in the family Pleurotomariidae, the slit snails.

The shell is false umbilicus and spirally twisted on all sides.

The shell is off-white in color with blazed red spirals.

It is surrounded on all sides with furrows or traces of growth.

[5] This species occurs in the Pacific Ocean off Japan, Fiji Islands and the Philippines.