Curtitoma finmarchia is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
(Original description) This species differs from Curtitoma decussata (<small>Couthouy, 1839)</small>. The shell is short and ovo-fusiform (or ovoid-spindle-shaped); the whorls are faintly angulated; the strongly prominent axial ribs are not much curved.
This marine species occurs in the Northwest Atlantic Ocean (esp. off Norway).