Rotaliotina discoidea
Rotaliotina discoidea, common name the discoid delphinula, is a species of small sea snail, a marine gastropod mollusk, in the family Liotiidae.
Description
The size of the shell varies between 4 mm and 9 mm. The shell has a discoidal shape, with a flattened spire. The periphery shows two prominentribs, connected by lattices which a subspinously project. The surface contains clathrate ridges, the interstices of which are finely striated.