Because of all this ongoing change, different reliable sources can yield very different classifications, especially within certain poorly understood groups.)

They are distinguished from Gibberula only on the basis of smaller size and other rather tenuous conchological differentiations.

The shell of this genus is 1.5 to 10 mm in length, ovoid, stout, with a small, low spire.

The columella has several plaits on a thickened rim, decreasing in size towards the posterior end.

It may be brightly coloured in the smaller species with a featureless, translucent shell, and its pattern is then continued into the spire over the visceral mass.