| Stomatellinae | |
|---|---|
 | |
| Shell of Stomatella auricula (syntype at MNHN, Paris) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Subfamily: | Stomatellinae Gray, 1840 |
| Synonyms | |
| |
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. [4]
The shells of species in this subfamily are mostly low-spired, subglobose, with few whorls. They are either Haliotis -shaped or non-spiral and limpet-like. They lack an umbilicus. Most species lack an operculum. The aperture is very arge, and through it the interior of the last whorl is entirely visible from below. The interior of the shell is iridescent because of a layer of nacre. The muscle impression inside the shell is crescent-shaped.
The animal has a broad foot, longitudinally divided by a median line below, and tuberculate above. The muzzle is broad, ending distally in an oval disc. The mouth is rounded. The long tentacles are pointed. The eyes are situated on short and heavy peduncles outside and behind the tentacles. The epipodium is prominent, fleshy, with or without cirri. Frontal lobes are present. The mantle edge is simple or reflexed and foliated. There is no slit in the front. The operculum is small, horny, thin, multispiral and often wanting. The gill has a single curved plume on the left or on the outer side of the mantle cavity. Its distal third is free. [5]
Genera within the subfamily Stomatellinae include:
Turbinidae, the turban snails, are a family of small to large marine gastropod molluscs in the superfamily Trochoidea.
The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles a toy spinning top.
Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.
Umbonium, sometimes known as the "button top shells", is a genus of sea snails, marine gastropod molluscs in the family Trochidae, the top snails.
Trochoidea is a superfamily of small to very large vetigastropod sea snails with gills and an operculum. Species within this superfamily have nacre as the inner shell layer. The families within this superfamily include the Trochidae, the top snails. This superfamily is the largest vetigastropodan superfamily, containing more than 2,000 species.
Trochaclididae, common name the false top snails, is a family of sea snails, marine gastropod mollusks in the clade Vetigastropoda.
Solariellidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea.
Liotiidae is a family of small sea snails, marine gastropod mollusks in the clade Vetigastropoda.
Vetigastropoda is a major taxonomic group of sea snails, marine gastropod mollusks that form a very ancient lineage. Taxonomically the Vetigastropoda are sometimes treated as an order, although they are treated as an unranked clade in Bouchet and Rocroi, 2005.
Fossarina is a genus of sea snails, marine gastropod molluscs in the family Trochidae, the top shells.
Angaria is a genus of sea snails, marine gastropod mollusks in the family Angariidae. Angaria is the only genus in the family Angariidae.
Colloniidae is a family of small sea snails with calcareous opercula, marine gastropod mollusks in the clade Vetigastropoda.
Monodonta australis, common name the toothed topshell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Monodonta is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.
Osilinus is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.
Stomatia, common name the keeled wide mouths, is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.
The Cantharidinae are a taxonomic subfamily of very small to large sea snails, marine gastropod molluscs in the family Trochidae, common name top snails.
The Fossarininae are a taxonomic subfamily of very small to large sea snails, marine gastropod molluscs in the family Trochidae, common name top snails.
Margaritidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea.
Microtis is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.