Lodderia coatsiana is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.
Lodderia coatsiana Wikipedia
The height of the shell attains 2.25 mm. This is a small, solid, white shell with a deep umbilicus, elegantly sculptured. It contains 4 whorls, with two apical sleek, white whorls. The two others are aequicostate with smooth, thickened, subflexuous ribs. The penultimate whorl is very flat. The last whorl has four spiral keels, with a blunt keel below the sutures, two at the periphery. The aperture is round.
This marine species occurs in the Magellanic Strait off Argentina at a depth of about 100 m.