Pleurotomella formosa is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
The length of the shell varies between 15 mm and 22 mm.
The thin, opaque shell is, dark-colored. The sculpture is variable, the longitudinal varying from striae to ribs, sometimes nodulous. The suture is deep, with a sloping infrasutural groove. The sinus is remarkably deep and broad. [1]
This marine species was found at bathyal depths off the Faroes in the North Atlantic Ocean.