Ailinzebina onobiformis is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Rissoinidae. These snails are part of the micromollusk group, meaning they are extremely tiny, often less than a few millimeters in size. Like other members of their family, they typically inhabit shallow marine environments and are found in sandy or coral-rich coastal areas.
The height of the shell attains 3.5 mm.
This species occurs in the Atlantic Ocean on the coast of the Cape Verde islands.