Antarctospira falklandica is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.
The shell has six whorls, one of which is a blunt protoconch and a half-whorl of axials. The shell has a consistent color of white, and is covered by a pale surface. The average length of the shell is 15.75 mm, and its diameter reaches up to 5.8 mm.
This marine species occurs off the Falkland Islands and Strait Of Magellan, east of Mouth, Tierra del Fuego, Argentina, South Atlantic Ocean.