Marita insculpta is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
The length of the shell attains 6 mm.
The shell is closely longitudinally plicate. The ribs form a slight posterior shoulder or angle, interstices with revolving lirae. The color of the shell is light yellowish brown, darker in the grooves.
This marine species is endemic to Australia and occurs off South Australia and Victoria.