These summary statistics and analyses are based on the European terrestrial mollusc dataset published in November 2011.
The status of selected terrestrial molluscs was assessed at two regional levels: geographical Europe and the EU 27. Among the species assessed at the European level, at least 20% are considered threatened, from which at least 4.3% are Critically Endangered, 4.1% Endangered and 11.5% Vulnerable. Eleven of the 53 Critically Endangered species are considered Possibly Extinct and three species are listed as already Extinct. A further 14.8% of the species are classified as Near Threatened.
Within the EU 27, the pattern is very similar: at least 20.7% of the selected terrestrial molluscs are threatened, of which at least 4.6% are Critically Endangered, 4.3% Endangered and 11.8% Vulnerable. In addition, 8.4% of species are considered as Near Threatened.
|IUCN Red List categories||No. species Europe (no. endemic species)||No. species EU 27 (no. endemic species)|
|Extinct (EX)||3 (3)||2 (2)|
|Critically Endangered (CR)||53 (52)||52 (51)|
|Endangered (EN)||51 (49)||49 (45)|
|Vulnerable (VU)||142 (135)||134 (122)|
|Near Threatened (NT)||182 (176)||156 (138)|
|Least Concern (LC)||677 (622)||625 (389)|
|Data Deficient (DD)||125 (124)||120 (99)|
|Total number of species assessed *||1233 (1161)||1138 (846)|
*This table does not include the Not Applicable species in Europe and/or the EU (species introduced after AD 1500 or species of marginal occurrence). For the EU 27 assessment the Not Evaluated species (species which do not occur in the EU) are also excluded.
This project focused on seventeen families, for which all the species native to Europe have been assessed. There are considerable differences in the number of species and in the threatened status, with the Lauriidae and Trissexodontidae being the most threatened, while the Pupillidae, the Bradybaenidae (consisting of only one species), the Orculidae and the Valloniidae are the least threatened. The bulk of the species are included in three families: the Hygromiidae, Helicidae and Enidae.
*Does not include species classed as Not Applicable (NA).