Pyramidella is a genus of minute to medium-sized sea snails, marine gastropod mollusc in the subfamily Pyramidellinae of the family Pyramidellidae, the pyrams and their allies.

[5] The animal has a head surmounted by broad, rather long tentacles, formed like a pointed horn, and open on the side.

The mouth is situated in a flattened, wide, dilated, and quite deeply two-lobed muzzle, separated from the foot by a groove.

The respiratory cavity open throughout the whole length of the mantle, bearing on its right margin a long and narrow branchia.

The foot is round, without a marginal furrow, passing down before in form of an ear-shaped shield, and bearing posteriorly a membranous operculum, with laminas destitute of a spire, which possesses one or two notches to slip upon the folds of the columella.