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, 181 9)
 * 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 * Trochoidea davidiana (Bourguignat, 1863) : synonym of Xerocrassa davidiana (Bourguignat, 1863) (superseded combination)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 * Trochoidea penchinati (Bourguignat, 1868) : synonym of Xerocrassa penchinati (Bourguignat, 1868) (superseded combination)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)