Trochoidea (genus)
# Trochoidea (genus)

Trochoidea is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helicellinae of the family Geomitridae. 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

Species within the genus Trochoidea include:

* Trochoidea caroni (Deshayes, 1830)
* Trochoidea cucullus (Martens, 1873)
* Trochoidea cumiae (Calcara, 1847)
* Trochoidea elata (A.E.J. Férussac, 1819) (synonym: Helix elata Férussac, 1819)
* Trochoidea elegans (Gmelin, 1791)
* Trochoidea liebetruti (Albers, 1852)
* Trochoidea pumilio (Dillwyn, 1817)
* Trochoidea pyramidata (Draparnaud, 1805)
* Trochoidea schembrii Pfeiffer, 1848
* Trochoidea spratti (Pfeiffer, 1846)
* Trochoidea tarentina (Pfeiffer, 1848)
* Trochoidea trochoides (Poiret, 1789)

The following species have been brought into synonymy:

* Trochoidea amanda (Rossmässler, 1838): synonym of Cernuella amanda E.A. Rossmässler, 1838
* Trochoidea betulonensis : synonym of Xerocrassa montserratensis ssp. betulonensis
* Trochoidea carinatoglobosa (Haas, 1934): synonym of Xerocrassa carinatoglobosa (F. Haas, 1934)
* Trochoidea claudinae : synonym of Xerocrassa claudinae
* Trochoidea davidiana (Bourguignat, 1863): synonym of Xerocrassa davidiana (Bourguignat, 1863) (superseded combination)
* Trochoidea conica J.P.R. Draparnaud, 1801: synonym of Trochoidea trochoides (Poiret, 1789)
* Trochoidea crenulata J. Germain, 1930: synonym of Trochoidea trochoides (Poiret, 1789)
* Trochoidea geyeri : synonym of Xerocrassa geyeri (Soós, 1926)
* Trochoidea gharlapsi : synonym of Xerocrassa gharlapsi
* Trochoidea infulata M. Paulucci, 1882: synonym of Trochoidea trochoides (Poiret, 1789)
* Trochoidea jimenensis : synonym of Xerocrassa jimenensis
* † Trochoidea miocaenica Gottschick & Wenz, 1927: synonym of † Miodiscula miocaenica (Gottschick & Wenz, 1927) (new combination)
* Trochoidea molinae : synonym of Xerocrassa molinae
* Trochoidea montserratensis : synonym of Xerocrassa montserratensis
* Trochoidea penchinati (Bourguignat, 1868): synonym of Xerocrassa penchinati (Bourguignat, 1868) (superseded combination)
* Trochoidea numidica Moquin-Tandon, 1847: synonym of Trochoidea pyramidata (Draparnaud, 1805)
* Trochoidea picardi Haas, 1933: synonym of Xerocrassa picardi Haas, 1933
* Trochoidea rhabdota (Sturany, 1901): synonym of Xerocrassa rhabdota (R. Sturany, 1901)
* Trochoidea pseudojacosta Forcart, 1976: synonym of Xerocrassa pseudojacosta (Forcart, 1976) (original combination)
* Trochoidea rugosa A. Aradas & G. Maggiore, 1839: synonym of Trochoidea trochoides (Poiret, 1789)
* Trochoidea rugosula R.A. Philippi, 1844: synonym of Trochoidea trochoides (Poiret, 1789)
* Trochoidea saintsimoni E. Caziot, 1903: synonym of Trochoidea trochoides (Poiret, 1789)
* Trochoidea seetzenii : synonym of Xerocrassa seetzeni
* Trochoidea scitula G.J. De Cristofori & G. Jan, 1832: synonym of Trochoidea elegans (J.F. Gmelin, 1791)
* Trochoidea simulata(C.G. Ehrenberg, 1831): synonym of Xerocrassa simulata (C.G. Ehrenberg, 1831)
* Trochoidea solarium A. Risso, 1826: synonym of Trochoidea elegans (J.F. Gmelin, 1791)
* Trochoidea terrestris E. Donovan, 1801: synonym of Trochoidea elegans (J.F. Gmelin, 1791)
* Trochoidea trochillus J.L.M. Poiret, 1789: synonym of Trochoidea elegans (J.F. Gmelin, 1791)
* Trochoidea trochlea L. Pfeiffer, 1846: synonym of Trochoidea elegans (J.F. Gmelin, 1791)
* Trochoidea zaharensis : synonym of Xerocrassa zaharensis (Puente & Arrébola, 1996)
