Diagnosis. Shell fusiform, small, elongated, protoconch small, 2 1/2 smooth, flat, subquadrate whorls; Operculum oval, subterminal nucleus; radula very small, reduced in terms of tooth size and cusp number, rachidian very thin, flat, weak, with one central, triangular cusp; lateral teeth, slightly curved, triangular. Penis long, cylindrical, with a large papilla in the tip, rising from a hole.
Etymology. From micro + dent + euthria, small teeth euthria refers to the small size of the radular teeth. The genus is feminine.