| Trochoidea | |
|---|---|
| | |
| Five views of a shell of Trochoidea pyramidata (Draparnaud, 1805) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Order: | Stylommatophora |
| Infraorder: | Helicoidei |
| Superfamily: | Helicoidea |
| Family: | Geomitridae |
| Genus: | Trochoidea Brown, 1827 [1] |
| Type species | |
| Helix elegansGmelin, 1791 | |
| Synonyms | |
| |
Trochoidea is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helicellinae of the family Geomitridae. [2] [3] The name means "those that are shaped like a top".
(The same name, Trochoidea is currently also used for a superfamily of sea snails with gills, a superfamily that includes the top shells, Trochidae, and the turban shells, Turbinidae.)
Species within the genus Trochoidea include: [4] [5]
The following species have been brought into synonymy:
Oxychilus is a genus of small air-breathing land snails, terrestrial pulmonate gastropods in the subfamily Oxychilinae of the family Oxychilidae, the glass snails.
Candidula is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Geomitridae, . the hairy snails and their allies.
Helicella is a genus of small to medium-sized, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helicellinae of the family Geomitridae, the hairy snails and their allies.

Helicopsis is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helicellinae of the family Geomitridae.
Retinella is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Gastrodontidae.
Xerocrassa is a genus of small, air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Geomitridae.
Xerocrassa geyeri is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Geomitridae. It is also often known as Trochoidea geyeri.