Stomatellinae is a subfamily of small sea snails with a brilliantly nacreous interior of the shell, marine gastropod mollusks in the family Trochidae, the top snails.

[1] In the earlier classification used in the Treatise on Invertebrate Paleontology, the Stomatellidae was included in the Archaeogastropoda, however, this taxon is now largely abandoned in favor of the more recently defined Vetigastropoda.

According to Bouchet & Rocroi (2005),[2] Williams et al. (2008)[3] and Williams et al. (2010)[4] this taxon underwent a rank change from family Stomatellidae to subfamily Stomatellinae within the family Trochidae.

The animal has a broad foot, longitudinally divided by a median line below, and tuberculate above.

The gill has a single curved plume on the left or on the outer side of the mantle cavity.