[2] The shell of these sand-dwelling micromollusks is small, but it is large enough to house the retracted soft parts including the entire mantle.

[2] The narrow shell aperture, which is ovate and pointed on the top, can be closed with a corneous operculum.

The thick shell is oviform to fusiform, with a short (sometimes sunken) conical apex.

The teeth are very similar in shape and size across the radula, which is specialised for a diet of polychaete worms.

The eggs are enclosed in a long, gelatinous mass, which is attached to the substrate with a short stalk.