by regulation SI 112/1990. A recent regional red list has been published of the non-marine molluscs of Ireland by Byrne et al. (2009). In this publication, the threat status of 150 native species was evaluated using IUCN regional guidelines. Of these species, two are considered to be regionally extinct, five critically endangered, fourteen endangered, twenty-six vulnerable, six near threatened, and the rest of least concern, or data deficient. This publication has sparked some media discussion about molluscan conservation in Ireland, including articles written in the Irish Times. Regional Red List of Irish non-marine molluscs The following species have been assigned threat categories or were considered regionally extinct on the island of Ireland in 2009: Regionally extinct (RE) Helicigona lapicida (Linnaeus, 1758); Omphiscola glabra (O.F. Müller, 1774) – listed as extinct in the red list, but rediscovered in 2009. Critically Endangered (CR) Pisidium conventus Clessin, 1877 Pomatias elegans (O.F. Müller, 1774) Margaritifera margaritifera (Linnaeus, 1758) Truncatella subcylindrica (Linnaeus, 1767) Margaritifera durrovensis Philips, 1928 Endangered (EN) Gyraulus laevis (Alder, 1838) Pisidium pulchellum Jenyns, 1832 Hydrobia acuta neglecta (Muus, 1963) Pupilla muscorum (Linnaeus, 1758) Mercuria cf. similis (Draparnaud, 1805) Quickella arenaria (Potiez & Michaud, 1835) Merdigera obscura (O.F. Müller, 1774) Spermodea lamellata (Jeffreys, 1830) Myxas glutinosa (O.F. Müller, 1774) Succinella oblonga Draparnaud, 1801 Pisidium moitessierianum Paladilhe, 1866 Vertigo moulinsiana (Dupuy, 1849) Pisidium pseudosphaerium Schlesch, 1947 Vertigo pusilla O.F. Müller, 1774 Vulnerable (VU) Acicula fusca (Montagu, 1803) Pisidium lilljeborgii Clessin, 1866 Anisus vortex (Linnaeus, 1758) Radix auricularia (Linnaeus, 1758) Anodonta anatina (Linnaeus, 1758) Sphaerium nucleus (Studer, 1820) Anodonta cygnea (Linnaeus, 1758) Tandonia rustica (Millet, 1843) Aplexa hypnorum (Linnaeus, 1758) Testacella haliotidea Draparnaud, 1801 Arianta arbustorum (Linnaeus, 1758) Vallonia pulchella (O.F. Müller, 1774) Balea perversa (Linnaeus, 1758) Ventrosia ventrosa (Montagu, 1803) Cecilioides acicula (O.F. Müller, 1774) Vertigo angustior Jeffreys, 1830 Cochlodina laminata (Montagu, 1803) Vertigo antivertigo (Draparnaud, 1801) Helicella itala (Linnaeus, 1758) Vertigo geyeri Lindholm, 1925 Leiostyla anglica (A. Férussac, 1821) Vertigo lilljeborgi (Westerlund, 1871) Limax cinereoniger Wolf, 1803 Zenobiella subrufescens (J.S. Miller, 1822) Musculium lacustre (O.F. Müller, 1774) Zonitoides excavatus (Alder, 1830) Systematic list The list is arranged by biological affinity, rather than being alphabetical by family. A number of species are listed with subspecies, in cases where there are well-recognized subspecies in different parts of Europe. For some species a synonym is given, where the species may perhaps be better known under another name. An attempt has been made to label the families