Elachorbis tatei is a species of minute sea snail with an operculum, a marine gastropod mollusk in the family Tornidae.
Elachorbis tatei Wikipedia
This species can be found along the coast of Western Australia and South Australia in shallow waters and in depths up to 150 fathoms (or 275 m).
The small shell varies in thickness. It possesses two coarse, spiral keels (a spiral ridge usually marking a change of slope in the outline of the shell) that can vary in strength or even be obsolete. The shell has a wide perspective umbilicus, and a discontinuous peristome.