Bactrocythara labiosa is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
The length of the shell attains 7 mm.
The shell is obliquely longitudinally costate, transversely sulcate. The sulci are indistinct on the ribs. The whorls are angulated above . The color of the shell is white, with a pellucid zone below the suture.[1]
This species is found in the Atlantic Ocean off the Cape Verdes, West Africa, Ghana, Angola.