This list of the non-marine molluscs of

Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...

comprises 165 species of non-marine

mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...

s which have been recorded as part of the

fauna of Ireland The fauna of Ireland comprises all the animal species inhabiting the island of Ireland and its surrounding waters. Summary This table uses figures supplied by the National Parks and Wildlife Service. Vertebrates by class Mammals Only 26 ...

. These are

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

and aquatic

gastropods The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. Ther ...

, and

bivalves Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

; the list does not include species of molluscs which are considered to be fully marine. In other words: this list includes

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

s and

slug Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc. The word ''slug'' is also often used as part of the common name of any gastropod mollusc that has no shell, a very reduced shell, or only a smal ...

s, and

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...

and

brackish water Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estua ...

snails. It also includes

freshwater mussel Freshwater bivalves are one kind of freshwater mollusc, along with freshwater snails. They are bivalves that live in fresh water as opposed to salt water, which is the main habitat type for bivalves. The majority of species of bivalve molluscs ...

s and freshwater clams, including some that can tolerate brackish water. Molluscs that are fully adapted to live in the sea are not included here.

is an island in the northeastern

Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe an ...

. It consists of the

Republic of Ireland Ireland ( ga, Éire ), also known as the Republic of Ireland (), is a country in north-western Europe consisting of 26 of the 32 counties of the island of Ireland. The capital and largest city is Dublin, on the eastern side of the island. A ...

, also known simply as Ireland (or in the Irish language ''Éire''), and

Northern Ireland Northern Ireland ( ga, Tuaisceart Éireann ; sco, label= Ulster-Scots, Norlin Airlann) is a part of the United Kingdom, situated in the north-east of the island of Ireland, that is variously described as a country, province or region. Nort ...

, which is part of the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

. The mollusc fauna of the island of Ireland has not been as thoroughly researched as that of the island of Great Britain, and therefore it is possible that some uncommon and local species (whether native or introduced) may, as yet, have been overlooked. Even so, it seems that the non-marine molluscan fauna of Ireland is a smaller fauna than that of Great Britain. This list is of land and freshwater molluscs only. Some species of gastropods listed here (for example ''

Peringia ulvae ''Peringia ulvae'' (or ''Hydrobia ulvae''), common name the Laver spire shell or mudsnail, is a European species of very small aquatic snail with gills and an operculum, a gastropod mollusk in the family Hydrobiidae.Gofas, S. (2010). ''Hydrobi ...

'') live in habitats that are intermediate between freshwater and saltwater. Others live in habitats that are intermediate between land and saltwater. Both of these kinds of species are often also included in marine faunal lists. In addition to the species that live naturally outdoors in Ireland, there are at least 2 aquatic gastropod species which live only in artificially-heated indoor environments such as aquaria in

greenhouse A greenhouse (also called a glasshouse, or, if with sufficient heating, a hothouse) is a structure with walls and roof made chiefly of Transparent ceramics, transparent material, such as glass, in which plants requiring regulated climatic condit ...

s. These are known as "hothouse aliens", and in this list they are not counted as part of the total fauna. A number of species are listed with subspecies, in cases where there are recognized subspecies in different parts of Europe. In some cases a synonym is given, where the species may be perhaps better known under an older name. The list is arranged by presumed biological affinity, rather than being alphabetical by family. The following table shows a summary of species numbers. It is not always easy to define which species are aquatic and which are terrestrial, as some species such as ''

Galba truncatula ''Galba truncatula'' is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae, the pond snails.Neubauer, Thomas A. (2014). Galba (Galba) truncatula (Müller, 1774). Accessed through: World R ...

'' are virtually amphibious. It also can be difficult to determine which species are introduced, as some introductions are quite ancient, for example from the

Paleolithic The Paleolithic or Palaeolithic (), also called the Old Stone Age (from Greek: παλαιός ''palaios'', "old" and λίθος ''lithos'', "stone"), is a period in human prehistory that is distinguished by the original development of stone too ...

. Those species that do not have a shell usually do not leave an archeological or fossil record, and therefore it is not always possible to determine whether they are native or introduced.

Conservation

Species protected by EU

Habitats Directive The Habitats Directive (more formally known as Council Directive 92/43/EEC on the Conservation of natural habitats and of wild fauna and flora) is a directive adopted by the European Community in 1992 as a response to the Berne Convention. The E ...

include: '' Geomalacus maculosus'' (annex II and IV), ''

Vertigo angustior ''Vertigo angustior'', the narrow-mouthed whorl snail, is a species of minute land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails. MolluscaBase eds. (2023). MolluscaBase. Verti ...

'', ''

Vertigo geyeri ''Vertigo geyeri'' is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusc in the family Vertiginidae, the whorl snails. The specific name ''geyeri'' is in honor of German zoologist David Geyer ...

'', ''

Vertigo moulinsiana Desmoulin's whorl snail (''Vertigo moulinsiana'') is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusc in the family Vertiginidae, the whorl snails. This species was named in honor of th ...

'' (annex II) and ''

Margaritifera margaritifera The freshwater pearl mussel (''Margaritifera margaritifera'') is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae. Although the name "freshwater pearl mussel" is often used for this species, ...

'' (annex II and V). Two species have been protected by the Wildlife Act of 1976 since 1990: '' Geomalacus maculosus'' and ''

''. They were added by regulation SI 112/1990.(7 January 2009)
''Checklist of protected & rare species in Ireland''
15 pp., page 12. A recent regional

red list The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biologi ...

has been published of the non-marine molluscs of Ireland by Byrne et al. (2009).Byrne A., Moorkens E. A., Anderson R., Killeen I. J. & Regan E. C. (2009)

Ireland Red List No. 2 – Non-Marine Molluscs. National Parks and Wildlife Service (Ireland), National Parks and Wildlife Service, Department of the Environment, Heritage and Local Government, Dublin, Ireland. 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 An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...

, twenty-six vulnerable, six

near threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...

, and the rest of

least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

, or

data deficient A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation status to be made. This does not necessaril ...

. 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 In geography, regions, otherwise referred to as zones, lands or territories, are areas that are broadly divided by physical characteristics (physical geography), human impact characteristics (human geography), and the interaction of humanity and t ...

on the island of Ireland in 2009: Regionally extinct (RE) '' Helicigona lapicida'' (Linnaeus, 1758); ''

Omphiscola glabra ''Omphiscola glabra'' (Synonym: Stagnicola glaber (O. F. Müller, 1774)) is a species of small to medium-size, air-breathing, freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae.Glöer P. (2002). Überfamilie Lym ...

'' (O.F. Müller, 1774) - listed as extinct in the red list, but rediscovered in 2009. Critically Endangered (CR) '' Pisidium conventus'' Clessin, 1877 ''

Pomatias elegans ''Pomatias elegans'', common name the round-mouthed snail, is a species of small land snail with an operculum, a terrestrial gastropod mollusk in the family Pomatiidae within the superfamily Littorinoidea, the winkles and their allies. This ...

'' (O.F. Müller, 1774) ''

'' (Linnaeus, 1758) ''

Truncatella subcylindrica ''Truncatella subcylindrica'' is a species of small land snail that lives at the edge of the sea. It has gills and an operculum and is gastropod mollusk or micromollusk in the family Truncatellidae. MolluscaBase eds. (2022). MolluscaBase. Trunc ...

'' (Linnaeus, 1767) '' Margaritifera durrovensis'' Philips, 1928 Endangered (EN) '' Gyraulus laevis'' (Alder, 1838) '' Pisidium pulchellum'' Jenyns, 1832 ''

Hydrobia acuta ''Hydrobia acuta'' is a species of very small (4-6mm.) brackish water snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. Description Draparnaud's description reads "Coquille ovale-oblongue, un peu con ...

neglecta'' (Muus, 1963) ''

Pupilla muscorum ''Pupilla muscorum'', commonly known as the Moss Chrysalis snail or widespread column, is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pupillidae. Taxonomy A variety ...

'' (Linnaeus, 1758) ''

Mercuria Mercuria Energy Group Ltd is a Cypriot-domiciled multinational commodity trading company active in a wide spectrum of global energy markets including crude oil and refined petroleum products, natural gas (including LNG), power, biodiesel, base ...

'' cf. ''similis'' (Draparnaud, 1805) '' Quickella arenaria'' (Potiez & Michaud, 1835) ''

Merdigera obscura ''Merdigera obscura'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Enidae. Distribution and habitat This species is present in north-western Africa and in most of Europe from Portugal to R ...

'' (O.F. Müller, 1774) ''

Spermodea lamellata ''Spermodea lamellata'' is a species of minute European land snail, a terrestrial gastropod mollusc, or micromollusc, in the family Valloniidae. Description For terms see gastropod shell''. The 2-2.2 mm x 2-2.2 mm shell has a char ...

'' (Jeffreys, 1830) '' Myxas glutinosa'' (O.F. Müller, 1774) '' Succinella oblonga'' Draparnaud, 1801 ''

Pisidium moitessierianum ''Pisidium moitessierianum'' is a species of minute freshwater clam. It is an aquatic bivalve mollusc in the family Sphaeriidae. Description This species is the smallest of the pea clams or ''Pisidium'' species, and the smallest of any ...

'' Paladilhe, 1866 ''

'' (Dupuy, 1849) ''

Pisidium pseudosphaerium ''Pisidium pseudosphaerium'' is a species of freshwater bivalve from family Sphaeriidae. Description The 2.5-3.2mm shell is a flattened, regular, slightly angulated oval shape with low central umbos. The surface is silky with very fine concentri ...

'' Schlesch, 1947 '' Vertigo pusilla'' Müller, 1774 Vulnerable (VU) '' Acicula fusca'' ( Montagu, 1803) ''

Pisidium lilljeborgii ''Pisidium lilljeborgii'' is a species of freshwater bivalve from the family Sphaeriidae. Description A moderately swollen (tumid), trapezoidal shell. The umbos are just behind the mid point and described as fairly narrow. The surface (periostra ...

'' Clessin, 1866 '' Anisus vortex'' (Linnaeus, 1758) ''

Radix auricularia ''Radix auricularia'', the big-ear radix, is a species of medium-sized freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae.Neubauer, Thomas A.; Rosenberg, G.; Gofas, S. (2014). Radix auricularia (Linnaeus, 1758) ...

'' (Linnaeus, 1758) ''

Anodonta anatina ''Anodonta'' is a genus of freshwater mussels in the family Unionidae, the river mussels. Species Species in this genus include: * '' Anodonta anatina'' Linné, 1758 – duck mussel * ''Anodonta beringiana'' Middendorff, 1851 – Yukon ...

'' (Linnaeus, 1758) '' Sphaerium nucleus'' (Studer, 1820) ''

Anodonta cygnea The swan mussel, ''Anodonta cygnea'', is a large species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels. Because of its morphological variability and its wide range of distribution, there are over ...

'' (Linnaeus, 1758) '' Tandonia rustica'' (Millet, 1843) ''

Aplexa hypnorum ''Aplexa hypnorum'', or by the common name, the moss bladder snail, is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae, a family which are sometimes known as the bladder snails ...

'' (Linnaeus, 1758) '' Testacella haliotidea'' Draparnaud, 1801 '' Arianta arbustorum'' (Linnaeus, 1758) ''

Vallonia pulchella ''Vallonia pulchella'', common name the lovely vallonia, is a species of very small air-breathing land snail, a terrestrial molluscs, terrestrial pulmonate gastropod mollusk in the family Valloniidae. MolluscaBase eds. (2023). MolluscaBase. Vallo ...

'' (O.F. Müller, 1774) '' Balea perversa'' (Linnaeus, 1758) '' Ventrosia ventrosa'' ( Montagu, 1803) ''

Cecilioides acicula ''Cecilioides acicula'', common name the "blind snail" or "blind awlsnail", is a species of very small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Ferussaciidae. This is a subterranean species. Desc ...

'' (Müller, 1774) ''

'' Jeffreys, 1830 ''

Cochlodina laminata ''Cochlodina laminata'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae, the door snails, all of which have a clausilium.MolluscaBase eds. (2020). MolluscaBase. Cochlodina A. Férussa ...

'' ( Montagu, 1803) '' Vertigo antivertigo'' (Draparnaud, 1801) ''

Helicella itala ''Helicella itala'' is a species of medium-sized, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Geomitridae, the hairy snails and their allies. MolluscaBase eds. (2021). MolluscaBase. Helicella itala (Linn ...

'' (Linnaeus, 1758) ''

'' Lindholm, 1925 '' Leiostyla anglica'' (A. Férussac, 1821) '' Vertigo lilljeborgi'' (Westerlund, 1871) ''

Musculium lacustre ''Musculium lacustre'' is a species of small freshwater clam, an aquatic bivalve mollusc in the family Sphaeriidae, the fingernail clams and pea clams. Description The 8–11 mm. shell is oval to quadrangular in shape. The umbos which are ...

'' (O.F. Müller, 1774) ''

Zonitoides excavatus ''Zonitoides excavatus'' is a European species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Gastrodontidae. Distribution Distribution of ''Zonitoides excavatus'' include: * British Isles: Great ...

'' (Alder, 1830)

Systematic list

The list is arranged by presumed 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 as aquatic, terrestrial or intermediate, and an indication is given where it is thought that the species is introduced. Those species that do not have a shell usually do not leave an archeological or fossil record, and therefore it is not always possible to determine whether they are native or introduced. Species are considered to be native, unless otherwise indicated; that information is taken from Kerney, 1999.Kerney, Michael, 1999, ''Atlas of the land and freshwater molluscs of Britain and Ireland'', Harley Books, Colchester, England, .

Gastropoda

;

Neritidae Neritidae, common name the nerites, is a taxonomic family of small to medium-sized saltwater and freshwater snails which have a gill and a distinctive operculum. MolluscaBase eds. (2021). MolluscaBase. Neritininae Poey, 1852. Accessed through: ...

- aquatic (also tolerates brackish water) * '' Theodoxus fluviatilis'' ''fluviatilis'' (Linnaeus, 1758) ;

Aciculidae The Aciculidae are a family of minute land snails which have opercula (an operculum is a little door that closes the shell when the animal retracts into it). In other words, Aciculidae are terrestrial operculate gastropods. Even though Acicul ...

- terrestrial * '' Acicula fusca'' ( Montagu, 1803) ;

Viviparidae Viviparidae, sometimes known as the river snails or mystery snails, are a family of large operculate freshwater snails, aquatic gastropod mollusks. This family is classified in the informal group Architaenioglossa according to the taxonomy ...

(river snails) - aquatic * ''

Viviparus viviparus ''Viviparus viviparus'' is a species of large freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Viviparidae, the river snails. This species is a viviparous ( ovoviviparous) snail. Description The heig ...

'' (Linnaeus, 1758) Bithynia tentaculata

; Assimineidae - terrestrial (intermediate marine) * '' Assiminea grayana'' Fleming, 1828 ;

Bithyniidae Bithyniidae is a family of small freshwater snails with an operculum, aquatic gastropod molluscs in the clade Littorinimorpha.Bouchet, P.; Gofas, S. (2015). Bithyniidae Gray, 1857. In: MolluscaBase (2015). Accessed through: World Register of Ma ...

- aquatic * ''

Bithynia leachii ''Bithynia leachii'' is species of small freshwater snail with an operculum, an aquatic prosobranch gastropod mollusk in the family Bithyniidae. Distribution It is a Palearctic species found in North Africa and Europe to East Siberia. * ...

'' (Sheppard, 1823) * '' Bithynia tentaculata'' (Linnaeus, 1758) ;

Hydrobiidae Hydrobiidae, commonly known as mud snails, is a large cosmopolitan family of very small freshwater and brackish water snails with an operculum; they are in the order Littorinimorpha. Distribution Hydrobiidae are found in much of the world, ...

(mud snails) - aquatic (some are arguably marine) * ''

'' ''neglecta'' Muus, 1963 * ''

Hydrobia ventrosa ''Ecrobia ventrosa'', common name spire snail, is a European species of small brackish water snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. Distribution This species occurs on the coasts of: * Ic ...

'' ( Montagu, 1803) = ''Ecrobia ventrosa'' * ''

'' (Pennant, 1777) * ''Mercuria'' c.f. ''similis'' (Draparnaud, 1805) = '' Mercuria confusa'' (Frauenfeld, 1863) * ''

Potamopyrgus antipodarum The New Zealand mud snail (''Potamopyrgus antipodarum'') is a species of very small freshwater snail with a gill and an operculum. This aquatic gastropod mollusk is in the family Tateidae. It is native to New Zealand, where it is found throug ...

'' (Gray, 1843) - introduced Valvata piscinalis shell

;

Valvatidae ''Valvatidae'', the valve snails, is a taxonomic family of very small freshwater snails with an operculum, aquatic gastropod mollusks. Taxonomy The family Valvatidae has no subfamilies (according to the taxonomy of the Gastropoda by Bouche ...

(valve snails) - aquatic * ''

Valvata cristata ''Valvata cristata'' is a species of minute freshwater snail with an operculum, an aquatic gastropod mollusk or micromollusk in the family Valvatidae, the valve snails. Distribution * Czech Republic - Bohemia and Moravia Horsák M., Juři� ...

'' O. F. Müller, 1774 * ''

Valvata piscinalis ''Valvata piscinalis'', common name the European stream valvata or European valve snail, is a species of minute freshwater snail with gills and an Operculum (gastropod), operculum, an Aquatic animal, aquatic gastropod mollusk in the family Valva ...

'' (O. F. Müller, 1774) ;

Pomatiidae The family Pomatiidae is a taxonomic family of small operculate land snails, terrestrial gastropod mollusks that can be found over the warmer parts of the Old World. In the older literature, this family is designated as Pomatiasidae. This famil ...

(land winkles) - terrestrial * ''

'' (Müller, 1774) The following gastropods are

pulmonate Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includ ...

s: ;

Ellobiidae Ellobiidae, common name the hollow-shelled snails, is a family of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Eupulmonata.Bouchet, P. (2012). Ellobiidae. Accessed through: World Register of Marine Spe ...

(hollow-shelled snails) - terrestrial or semi-marine * ''

Carychium minimum ''Carychium minimum'' is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Ellobiidae. Description The width of the shell is 0.9-1.1 mm. The height of the shell is 1.6-2.2 mm. It ...

'' Müller, 1774 * ''

Carychium tridentatum ''Carychium tridentatum'' is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Ellobiidae. Description The shell is 1.8-2.3 mm high x 0.8-0.9mm. wide. The shell is more slender than th ...

'' (Risso, 1826) * '' Leucophytia bidentata'' ( Montagu, 1808) * '' Myosotella denticulata'' ( Montagu, 1803) * '' Myosotella myosotis'' (Draparnaud, 1801) Physa acuta 001

; Otinidae - aquatic (almost fully marine, but a pulmonate) * '' Otina ovata'' (Brown, 1827) ;

Physidae Physidae, common name the bladder snails, is a monophyletic taxonomic family of small air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the superfamily Lymnaeoidea .MolluscaBase eds. (2021). MolluscaBase. Physida ...

(bladder snails) - aquatic * ''

'' (Linnaeus, 1758) * ''

Physa fontinalis ''Physa fontinalis'', common name the common bladder snail, is a species of air-breathing freshwater snail, an aquatic gastropod mollusk in the family Physidae. The shells of species in the genus ''Physa'' are left-handed or sinistral. Desc ...

'' (Linnaeus, 1758) * ''

Physella acuta ''Physella acuta'' is a species of small, left-handed or sinistral, air-breathing freshwater snail, an aquatic gastropod mollusk in the family Physidae. Common names include European physa, tadpole snail, bladder snail, and acute bladder snail ...

'' (Draparnaud, 1805) = ''Physella heterostropha'' (Say, 1817) - introduced * '' Physella gyrina'' (Say, 1821) - introduced Water snail Rex 2

;

Lymnaeidae Lymnaeidae, common name the pond snails, is a taxonomic family of small to large air-breathing freshwater snails, aquatic pulmonate gastropod mollusks, that belong to the clade Hygrophila. Lymnaeidae is the only family within the superfamily ...

- aquatic * ''

'' (O. F. Müller, 1774) * ''

'' (O. F. Müller, 1774) - at one site in the south east of Ireland was found in 2009, but it is listed as extinct on a local red list (2009).Anderson R. (2009)
"Value of species datasets as baselines (non-marine Mollusca)"
. accessed 31 July 2010. * ''

Lymnaea stagnalis ''Lymnaea stagnalis'', better known as the great pond snail, is a species of large air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae. The great pond snail is a model organism to study parasitology, ...

'' (Linnaeus, 1758) * '' Lymnaea fusca'' (C.Pfeiffer, 1821) * ''

'' (Linnaeus, 1758) * ''

Radix balthica ''Radix balthica'', common name the wandering snail, is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Lymnaeidae, the pond snails.Neubauer, Thomas A.; Rosenberg, G.; Gofas, S. (2014). Radix ...

'' (Linnaeus, 1758) * ''

Radix peregra ''Peregriana peregra'' is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod in the family Lymnaeidae, the pond snails. Distribution and habitat This small pond snail is found in Europe, Newfoundland and northern A ...

'' (Linnaeus, 1758) * '' Myxas glutinosa'' (O. F. Müller, 1774) Posthornschnecke1

;

Planorbidae Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs. Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instea ...

(ramshorn snails) - aquatic * ''

Planorbis carinatus ''Planorbis carinatus'' is species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ramshorn snails. Description The width of shell of this species is 9–15 mm. The shell has a noticeable k ...

'' O. F. Müller, 1774 * ''

Planorbis planorbis ''Planorbis planorbis'' is a species of air-breathing freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails.Neubauer, Thomas A. (2014). ''Planorbis'' (''Planorbis'') ''planorbis'' (Linnaeus, 1758). Acc ...

'' (Linnaeus, 1758) * ''

Anisus leucostoma ''Anisus leucostoma'' is a European species of small air-breathing freshwater snail, an aquatic pulmonate gastropod in the family Planorbidae, the ram's horn snails and their allies. Taxonomy Glöer (2002) Glöer P. (2002). ''Die Süßwasserga ...

'' (Millet, 1813) * '' Anisus vortex'' (Linnaeus, 1758) * ''

Anisus vorticulus ''Anisus vorticulus'' (lesser ramshorn snail or little whirlpool ramshorn snail) is a species of minute, air-breathing, freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails. Description The lesser ramsho ...

'' (Troschel, 1834) * ''

Anisus spirorbis ''Anisus spirorbis'' is a species of small freshwater air-breathing snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails. MolluscaBase eds. (2021). MolluscaBase. Anisus spirorbis (Linnaeus, 1758). Access ...

'' (Linnaeus, 1758) * ''

Bathyomphalus contortus ''Bathyomphalus contortus'' is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails and their allies. Distribution The distribution of this species is Pa ...

'' (Linnaeus, 1758) * '' Gyraulus laevis'' (Alder, 1838) * '' Gyraulus albus'' (O. F. Müller, 1774) * '' Gyraulus crista'' (Linnaeus, 1758) * '' Hippeutis complanatus'' (Linnaeus, 1758) * ''

Planorbarius corneus ''Planorbarius corneus'', common name the great ramshorn, is a relatively large species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids, which all have ...

'' corneus (Linnaeus, 1758) * ''

Ancylus fluviatilis The river limpet (''Ancylus fluviatilis'') is a species of very small, freshwater, air-breathing limpet, an aquatic pulmonate gastropod mollusk in the tribe Ancylini within the family Planorbidae, the ram's horn snails and their allies. ...

'' O. F. Müller, 1774 ; Acroloxidae (river limpets) - aquatic * ''

Acroloxus lacustris ''Acroloxus lacustris'', or the lake limpet, is a small freshwater limpet or snail, a species of aquatic gastropod mollusk in the family Acroloxidae. Description The 4–7 mm. (7 mm long, 3 mm wide and 2 mm high) shell is l ...

'' (Linnaeus, 1758) Succinea putris 2

;

Succineidae Succineidae are a family of small to medium-sized, air-breathing land snails (and slugs), terrestrial pulmonate gastropod molluscs in the superfamily Succineoidea.MolluscaBase eds. (2021). MolluscaBase. Succineidae Beck, 1837. Accessed thr ...

(amber snails)- terrestrial (some almost amphibious) * ''Quikella arenaria'' (Bouchard-Chantereaux, 1837) = '' Catinella arenaria'' * '' Succinella oblonga'' Draparnaud, 1801 * ''

Succinea putris ''Succinea putris'' is a species of small air-breathing land snail in the family Succineidae, the amber snails. Description The 10-17 (27) x 6-8 mm has 3-4 whorls. These are relatively flat and with shallow sutures. The body whorl is ma ...

'' Linnaeus, 1758 * ''

Oxyloma elegans ''Oxyloma elegans'' is a species of small European land snail, a terrestrial pulmonate gastropod mollusk belonging to the family Succineidae, the amber snails. Description The shell usually has fewer than 3 whorls. The body whorl is very la ...

elegans'' (Risso, 1826) = ''Oxyloma pfeifferi'' (Rossmässler, 1835) * ''

Oxyloma sarsii ''Oxyloma sarsii'' is a species of small European land snail, a terrestrial pulmonate gastropod mollusk belonging to the family Succineidae, the amber snails. Description Only reliably separated from the very similar '' Oxyloma elegans'' by ...

'' (Esmark, 1886) ;

Cochlicopidae Cochlicopidae is a taxonomic family of small, air-breathing, land snails, terrestrial pulmonate gastropod mollusks in the superfamily Cochlicopoidea. Anatomy In this family, the number of haploid chromosome A chromosome is a long DN ...

- terrestrial * ''Cochlicopa'' c.f. ''lubrica'' = ''

Cochlicopa lubrica ''Cochlicopa lubrica'' is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Cochlicopidae.MolluscaBase eds. (2020). MolluscaBase. Cochlicopa lubrica (O. F. Müller, 1774). Accessed through: ...

'' (O. F. Müller, 1774) * ''Cochlicopa'' c.f. ''lubricella'' = ''

Cochlicopa lubricella ''Cochlicopa lubricella'' is a European species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Cochlicopidae. MolluscaBase eds. (2020). MolluscaBase. Cochlicopa lubricella (Porro, 1838). Accessed thr ...

'' (Rossmässler, 1835) Vertigo substriata shell

;

Pyramidulidae Pyramidulidae is a family (biology), family of small air-breathing land snails, terrestrial molluscs, terrestrial pulmonate gastropod mollusks in the superfamily Pupilloidea. MolluscaBase eds. (2022). MolluscaBase. Pyramidulidae Kennard & B. B. W ...

- terrestrial * '' Pyramidula umbilicata'' ( Montagu, 1803) * '' Pyramidula pusilla'' (Vallot, 1801) ;

Vertiginidae Vertiginidae, common name the whorl snails, is a family of minute, air-breathing land snails, terrestrial pulmonate gastropod molluscs or micromollusks in the superfamily Pupilloidea. Distribution The distribution of the Vertiginidae is in the ...

(whorl snails) - terrestrial * '' Columella edentula'' Draparnaud, 1805) * '' Columella aspera'' Walden, 1966 Vertigo pusilla shell

* '' Vertigo antivertigo'' (Draparnaud, 1801) * ''

'' Lindholm, 1925 * '' Vertigo lilljeborgi'' (Westerlund, 1871) * ''

'' (Dupuy, 1849) * '' Vertigo pusilla'' O. F. Müller, 1774 * '' Vertigo pygmaea'' (Draparnaud, 1801) * '' Vertigo substriata'' (Jeffreys, 1833) * ''

'' Jeffreys, 1830 ;

Pupillidae Pupillidae is a family of mostly minute, air-breathing, land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the superfamily Pupilloidea. MolluscaBase eds. (2021). MolluscaBase. Pupillidae W. Turton, 1831. Accessed through: ...

- terrestrial * ''

'' (Linnaeus, 1758) ;

Lauriidae Lauriidae is a family of land snails. It is classified within the informal group Orthurethra, itself belonging to the clade Stylommatophora within the clade Eupulmonata (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005) ...

- terrestrial * '' Leiostyla anglica'' (Wood, 1828) * ''

Lauria cylindracea ''Lauria cylindracea'', common name "the common chrysalis snail", is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Lauriidae. Description For terms see gastropod shell The 3-4 x 1.8 mm ...

'' (da Costa, 1778) Acanthinula aculeata

;

Valloniidae Valloniidae is a taxonomic family of small and minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Pupilloidea. MolluscaBase eds. (2020). MolluscaBase. Valloniidae Morse, 1864. Accessed through: Worl ...

- terrestrial * ''

Vallonia costata ''Vallonia costata'' is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Valloniidae.MolluscaBase eds. (2023). MolluscaBase. Vallonia costata (O. F. Müller, 1774). Accessed through: World Re ...

'' (O. F. Müller, 1774) * ''

'' (O. F. Müller, 1774) * ''Vallonia'' c.f. ''excentrica'' = ''

Vallonia excentrica ''Vallonia excentrica'', common name the eccentric vallonia, is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Valloniidae.Marshall, B. (2014). Vallonia excentrica Sterki, 1893. Acces ...

'' Sterke, 1892 * ''

Acanthinula aculeata ''Acanthinula aculeata'' is a species of minute, air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Valloniidae. Description For terms see gastropod shell. The 1.9-2.1 mm. shell is sligh ...

'' (O. F. Müller, 1774) * ''

'' (Jeffreys, 1830) Discus rotundatus

;

Enidae Enidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks. MolluscaBase eds. (2020). MolluscaBase. Enidae B. B. Woodward, 1903 (1880). Accessed through: World Register of Marine Species at: http://www.marinespecies ...

- terrestrial * ''

'' = ''Ena obscura'' (O. F. Müller, 1774) ;

Punctidae Punctidae, common name the "dot snails" or "pinhead snails", is a family of minute air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the informal group Sigmurethra (according to the taxonomy of the Ga ...

(dot snails) - terrestrial * ''

Punctum pygmaeum ''Punctum pygmaeum'' is a species of very small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails. Shell description For terms see gastropod shell. The shell is very small, 1.2-1. ...

'' (Draparnaud, 1801) ;

Discidae Discidae is a taxonomic family of small air-breathing land snails, terrestrial gastropod mollusks in the superfamily Punctoidea. Genera The family Discidae has no subfamilies. Genera within the family Discidae include: * ''Anguispira'' Morse, ...

- terrestrial * ''

Discus rotundatus ''Discus rotundatus'', common name rotund disc, is a species of small, air-breathing, land snail, a terrestrial pulmonate gastropod mollusk in the family Discidae, the disk snails. Description The shells of ''Discus rotundatus'' in the adult st ...

'' ''rotundatus'' (O. F. Müller, 1774) Black Slug

; Arionidae (roundback slugs) - terrestrial * ''

Arion ater Arion (; grc-gre, Ἀρίων; fl. c. 700 BC) was a kitharode in ancient Greece, a Dionysiac poet credited with inventing the dithyramb. The islanders of Lesbos claimed him as their native son, but Arion found a patron in Periander, tyrant ...

'' (Linnaeus, 1758) * '' Arion flagellus'' Collinge, 1893 * ''

Arion vulgaris The Spanish slug (''Arion vulgaris'', but also widely known as ''Arion lusitanicus'' owing to a misidentification) is an air-breathing land slug, a terrestrial molluscs, terrestrial pulmonate gastropod mollusc, mollusk in the family Arionidae, th ...

'' Moquin-Tandon, 1855 = (misapplied) ''Arion lusitanicus'' Mabille, 1868 - introduced * ''

Arion subfuscus ''Arion subfuscus'' is a species of land slug. It forms a species complex In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often u ...

'' Draparnaud, 1805 ( if this is considered to be a separate taxon from ''A. fuscus'') * '' Arion fuscus'' (O.F. Müller, 1774) * '' Arion circumscriptus'' Johnston, 1828 * ''

Arion rufus The red slug (''Arion rufus''), also known as the large red slug,Arion silvaticus ''Arion silvaticus'' is a species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Arionidae. Description Note. In slugs it is often difficult to establish good criteria for identifying species using exte ...

'' Lohmander, 1937 Arion distinctus 1

* '' Arion fasciatus'' (Nilsson, 1823) * ''

Arion hortensis ''Arion hortensis'', also known by its common name the "garden slug", "small striped slug" or "black field slug" is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Arionidae, the roundback ...

'' A. Férussac, 1819 * ''

Arion distinctus ''Arion distinctus'' is a species of air-breathing land slug in the family Arionidae, sometimes known as the roundback slugs. It is a terrestrial pulmonate gastropod mollusc. Several vernacular names exist, but it is unclear if they are much ...

'' J. Mabille, 1868 * ''

Arion owenii ''Arion owenii'' is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusc in the family Arionidae, the roundback slugs. Description Note. In slugs it is often difficult to establish good criteria for identifyi ...

'' Davies, 1979 * ''

Arion intermedius ''Arion intermedius'' is a species of land slug in the family Arionidae, the roundback slugs. It is known commonly as the hedgehog slug,Arion occultus ''Arion occultus'' is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Arionidae, the roundback slugs. Distribution This species occurs in: * Ireland; appears to be introduced in Ireland, b ...

'' Anderson, 2004 * '' Geomalacus maculosus'' Allman, 1843 ;

Pristilomatidae Pristilomatidae is a taxonomic family of air-breathing land snails, terrestrial gastropod mollusks in the superfamily Gastrodontoidea. According to the 2005 taxonomy of the Gastropoda by Bouchet & Rocroi these snails belong to the "limacoid ...

- terrestrial * '' Vitrea contracta'' (Westerlund, 1871) * '' Vitrea crystallina'' (O. F. Müller, 1774) Zonitoides nitidus1pl

;

Euconulidae Euconulidae is a taxonomic family of minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the superfamily Trochomorphoidea. This land snail family is closely allied to the Zonitidae, the glass snails. ...

- terrestrial * ''Euconulus'' c.f. ''fulvus'' (O. F. Müller, 1774) = '' Euconulus fulvus'' * ''Euconulus'' c.f. ''alderi'' (J.E. Gray, 1840) = '' Euconulus alderi'' ;

Gastrodontidae Gastrodontidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Gastrodontoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). MolluscaBase eds. (2020). MolluscaBase ...

- terrestrial * ''

Zonitoides nitidus ''Zonitoides nitidus'' (sometimes ''Zonitoides nitida'') is a species of small, air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Gastrodontidae. ''Zonitoides nitidus'' is the type species of the genus '' Zonito ...

'' (O. F. Müller, 1774) * ''

'' (Alder, 1830) ;

Oxychilidae Oxychilidae is a taxonomic family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Gastrodontoidea. Distribution The distribution of Oxychilidae includes the Nearctic, western-Palearctic, eastern-Palear ...

- terrestrial * '' Oxychilus alliarius'' (Miller, 1822) * '' Oxychilus cellarius'' (O. F. Müller, 1774) * '' Oxychilus draparnaudi'' ''draparnaudi'' (Beck, 1837) - introduced * ''

Oxychilus navarricus ''Oxychilus navarricus'', before 2002 known as ''Oxychilus helveticus'' (Blum, 1881), is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Oxychilidae, the glass snails. Description For terms se ...

'' ''helveticus'' (Blum, 1881) - introduced * '' Aegopinella nitidula'' (Draparnaud, 1805) * '' Aegopinella pura'' (Alder, 1830) * ''Nesovitrea hammonis'' (Ström, 1765) ='' Perpolita hammonis'' Tandonia budapestensis

;

Milacidae Milacidae is a family of air-breathing, keeled, land slugs. These are shell-less terrestrial gastropod mollusks in the superfamily Parmacelloidea. This family has no subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocro ...

- terrestrial * '' Milax gagates'' (Draparnaud, 1801) * '' Tandonia rustica'' (Millet, 1843) * ''

Tandonia budapestensis ''Tandonia budapestensis'' is a species of air-breathing, keeled, land slug, a shell-less terrestrial gastropod mollusks in the family Milacidae.Marshall, B. (2014). Tandonia budapestensis (Hazay, 1880). Accessed through: World Register of Marin ...

'' (Hazay, 1881) * '' Tandonia sowerbyi'' (A. Férussac, 1823) ;

Vitrinidae Vitrinidae is a family of small, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Limacoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). MolluscaBase eds. (2021). MolluscaBa ...

- terrestrial * ''

Vitrina pellucida ''Vitrina pellucida'' is species of small land snail, a terrestrial molluscs, terrestrial pulmonate gastropod mollusk in the family Vitrinidae, the glass snails. Description This species is a 'semi-slug' with a flattened, globular shell. The ...

'' (O. F. Müller, 1774) * '' Semilimax pyrenaicus'' (A. Férussac, 1821) - introduced? Tigerschnegel P7234649 filtered

;

Boettgerillidae ''Boettgerilla'' is a genus of air-breathing land slugs, terrestrial pulmonate gastropod molluscs in the family Boettgerillidae. The generic name ''Boettgerilla'' is named after the German malacologist Oskar Boettger. Taxonomy ''Boettger ...

- terrestrial * ''

Boettgerilla pallens ''Boettgerilla pallens'', common name the worm slug, is a European species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Boettgerillidae. Distribution The type locality of ''Boettgerilla pallens'' is Gu ...

'' Simroth, 1912 - introduced ;

Limacidae Limacidae, also known by their common name the keelback slugs, are a taxonomic family of medium-sized to very large, air-breathing land slugs, terrestrial pulmonate gastropod molluscs in the superfamily Limacoidea. Distribution The distr ...

(keelback slugs) - terrestrial * '' Limax maximus'' Linnaeus, 1758 * ''

Limax cinereoniger ''Limax cinereoniger'' is a large species of air-breathing land slug in the terrestrial pulmonate gastropod mollusk family Limacidae, the keelback slugs. This is the largest land slug species in the world.Limacus flavus ''Limacus flavus'', known commonly as the cellar slug, the yellow slug, or the tawny garden slug, is a medium to large species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Limacidae.MolluscaBase (2019). ...

'' (Linnaeus, 1758) * '' Limax maculatus'' (Kaleniczenko, 1851) - introduced * ''

Lehmannia marginata ''Lehmannia marginata'' is a species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Limacidae. Sometimes classified in the genus ''Limax'', the species is distinct in its ecology, and its nearly transpare ...

'' (O. F. Müller, 1774) * ''

Lehmannia valentiana ''Ambigolimax valentianus'' (also known as ''Lehmannia valentiana'') is a species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Limacidae. Description '' External appearance does not reliably distinguish ...

'' (A. Férussac, 1822) ;

Agriolimacidae ''Agriolimacidae'' is a family of small and medium-sized land slugs, or shell-less snails, terrestrial pulmonate gastropod mollusks. Distribution Distribution of Limacidae is Holarctic, this include: Nearctic, western Palearctic and eastern Pal ...

- terrestrial * ''

Deroceras laeve ''Deroceras laeve'', the marsh slug, is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Agriolimacidae. Distribution The distribution of ''Deroceras laeve'' was originally Palearctic, from ...

'' (O. F. Müller, 1774) * ''

Deroceras reticulatum ''Deroceras reticulatum'', common names the "grey field slug" and "grey garden slug", is a species of small air-breathing land slug, a terrestrial pulmonate gastropod mollusc in the family Agriolimacidae. This species is an important agricul ...

'' (O. F. Müller, 1774) * '' Deroceras invadens'' Reise, Hutchinson, Schunack & Schlitt, 2011 = ''Deroceras panormitanum'' (nec. sensu Lessona & Pollonera, 1882) = ''Deroceras caruanae'' (nec. sensu Pollonera, 1891) Door snail

;

Ferussaciidae Ferussaciidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Achatinoidea. MolluscaBase eds. (2020). MolluscaBase. Ferussaciidae Bourguignat, 1883. Accessed through: World Register of Marine ...

- terrestrial * ''

'' (O. F. Müller, 1774) ;

Clausiliidae Clausiliidae, also known by their common name the door snails, are a taxonomic family of small, very elongate, mostly left-handed, air-breathing land snails, sinistral terrestrial pulmonate gastropod mollusks.MolluscaBase eds. (2020). MolluscaBa ...

(door snails) - terrestrial * ''

'' ( Montagu, 1803) * '' Clausilia bidentata'' ''bidentata'' (Ström, 1765) * '' Balea perversa'' (Linnaeus, 1758) * '' Balea sarsii'' Pfeiffer, 1847 ; Testacellidae (shelled slugs) - terrestrial * '' Testacella maugei'' A. Férussac, 1822 * '' Testacella haliotidea'' Draparnaud, 1801 * '' Testacella scutulum'' Sowerby, 1821 ;

Cochlicellidae Cochlicellidae is a family of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). The family Cochlicellidae has no sub ...

- terrestrial * '' Cochlicella acuta'' (O. F. Müller, 1774) ;

Hygromiidae Hygromiidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. Helicellidae Ihering, 1909 Anatomy Some snails in genera within this family create ...

- terrestrial Cepaea nemoralis02

* '' Ashfordia granulata'' (Alder, 1830) * '' Candidula gigaxii'' (L. Pfeiffer, 1850) - introduced * '' Candidula intersecta'' (Poiret, 1801) - introduced * '' Cernuella virgata'' (Da Costa, 1778) - introduced * ''

'' ''itala'' (Linnaeus, 1758) * ''

Hygromia cinctella ''Hygromia cinctella'', known commonly as the girdled snail, is a small European species of air-breathing land snail, native to the Mediterranean region, that belongs to the terrestrial pulmonate gastropod mollusk subfamily Hygromiinae of the ...

'' (Draparnaud, 1801) - introduced * ''

Trochulus hispidus ''Trochulus hispidus'', previously known as ''Trichia hispida'', common name, the "hairy snail", is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Hygromiidae, the hairy snails and their allies. ...

'' (Linnaeus, 1758) * '' Trochulus striolatus'' (Pfeiffer, 1828) - indigenous? * '' Zenobiella subrufescens'' (Miller, 1822) ;

Helicidae Helicidae is a large, diverse family (biology), family of small to large, air-breathing land snails, sometimes called the "typical snails." A number of species in this family are valued as food items, including ''Cornu aspersum'' (formerly ''Heli ...

(typical snails) - terrestrial * '' Arianta arbustorum'' ''arbustorum'' (Linnaeus, 1758) * '' Helicigona lapicida'' ''lapicida'' (Linnaeus, 1758) * ''

Theba pisana ''Theba pisana'', common names the white garden snail, sand hill snail, white Italian snail, Mediterranean coastal snail, and simply just the Mediterranean snail, is an edible species of medium-sized, air-breathing land snail, a terrestrial pulmon ...

'' ''pisana'' (O. F. Müller, 1774) - introduced * ''

Cepaea nemoralis The grove snail, brown-lipped snail or Lemon snail (''Cepaea nemoralis'') is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc. MolluscaBase eds. (2020). MolluscaBase. Cepaea nemoralis (Linnaeus, 1758). Accessed thr ...

'' ''nemoralis'' (Linnaeus, 1758) * ''

Cepaea hortensis The white-lipped snail or garden banded snail, scientific name ''Cepaea hortensis'', is a medium-sized species of air-breathing land snail, a terrestrial molluscs, terrestrial pulmonate gastropod mollusc in the family Helicidae. It is a close rel ...

'' (O. F. Müller, 1774) * ''

Cornu aspersum ''Cornu aspersum'' (syn. ''Cryptomphalus aspersus''), known by the common name garden snail, is a species of land snail in the family Helicidae, which includes some of the most familiar land snails. Of all terrestrial molluscs, this species may ...

'' ''aspersum'' = ''Helix aspersa'' (O.F. Müller, 1774) - introduced

Bivalvia

; Margaritiferidae - aquatic * ''

'' (Linnaeus, 1758) Anodonta cygnea1

;

Unionidae The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. The range of distribution for this family is world-wide. It is at its most diverse ...

(river mussels) - aquatic * ''

'' (Linnaeus, 1758) * ''

'' (Linnaeus, 1758) ;

Sphaeriidae Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known as pea clams or fingernail clams. Heard, William H. 1977. Reproduction of fingernail clams (Sphaeriidae: ''Sphae ...

(pea clams, fingernail clams) - aquatic * ''

Sphaerium corneum ''Sphaerium corneum'', also known as the European fingernailclam, is a very small freshwater clam, an aquatic bivalve mollusk in the family Sphaeriidae, the fingernail clams. Description The shell is fairly globular and can grow up to 9–13.5 ...

'' (Linnaeus, 1758) * '' Sphaerium nucleus'' (Studer, 1820) * ''

'' (O. F. Müller, 1774) * ''

Pisidium amnicum ''Pisidium amnicum'' is a species of very small freshwater clam, sometimes known as the greater European peaclam or the River pea shell. It is an aquatic bivalve in the family Sphaeriidae. Description Although only 9 mm (range 7–11& ...

'' (O. F. Müller, 1774) * ''

Pisidium casertanum ''Pisidium casertanum'', the pea cockle or pea clam, is a minute freshwater bivalve mollusc of the family Sphaeriidae. Description The shell is broad, sub-triangular or oval and is ornamented with sculpture of faint concentric striations. ...

'' (Poli, 1791) * '' Pisidium conventus'' (Clessin, 1877) * ''

Pisidium henslowanum ''Pisidium henslowanum'' is a species of very small freshwater clam or pea clam, an aquatic bivalve mollusc in the family Sphaeriidae. It is commonly referred to as the Henslow peaclam. Etymology The specific name honours John Stevens Henslo ...

'' (Sheppard, 1823) * ''

Pisidium hibernicum ''Pisidium hibernicum'' is a species of freshwater bivalve from the family Sphaeriidae. Description The 2.5-3.5mm. shell is very inflated (convex) hence the common name Globular Pea Shell. The central umbos is prominent. The periostracum (surfa ...

'' Westerlund, 1894 * ''

'' (Clessin, 1886) * '' Pisidium milium'' Held, 1836 Dreissena polymorpha1

* ''

'' Paladilhe, 1866 * ''

Pisidium nitidum ''Pisidium nitidum'', the shining pea clam, is a species of minute freshwater clam, an aquatic bivalve mollusc in the family Sphaeriidae, the pea clams and fingernail clams. Description The 3 – 4 mm. shell is slightly tumid (swollen). ...

'' Jenyns, 1832 * ''

Pisidium obtusale ''Pisidium obtusale'' is a species of freshwater bivalve from family Sphaeriidae. Description The 2.5–3.5mm. shell is very tumid (swollen). It is an angular-oval shape with broad, rounded umbos which are behind the midpoint. The surface (perio ...

'' (Lamarck, 1818) * ''

Pisidium personatum ''Pisidium personatum'' is a species of freshwater bivalve from the family Sphaeriidae. Description The 2.5-3.5 mm shell is a characteristic round-regular oval shape. It has centrally placed low, rounded umbos. The surface (periostracum) is ...

'' Malm, 1855 * '' Pisidium pulchellum'' (Jenyns, 1832) * ''

'' Favre, 1927 * '' Pisidium subtruncatum'' Malm, 1855 ;

Dreissenidae The Dreissenidae are a family of small freshwater mussels, aquatic bivalve molluscs. They attach themselves to stones or to any other hard surface using a byssus. The shells of these bivalves are shaped somewhat like those of true mussels, and ...

- aquatic * ''

Dreissena polymorpha The zebra mussel (''Dreissena polymorpha'') is a small freshwater mussel. The species originates from the lakes of southern Russia and Ukraine, but has been accidentally Introduced species, introduced to numerous other areas and has become an inv ...

'' (Pallas, 1771) - introduced ;

Corbiculidae The Corbiculidae are a family of clams in the mollusc order Venerida. They are known commonly as basket clams. The family name comes from the root ''corbus'' ("basket"), and was inspired by the concentric ribbing of the shells.Glaubrecht, M., et ...

(basket clams) *''

Corbicula fluminea ''Corbicula fluminea'' is a species of freshwater clam native to eastern Asia which has become a successful invasive species throughout North America, South America, and Europe. ''Corbicula fluminea'' is commonly known in the west as the Asian cl ...

'' (Müller, 1774)- introduced

List of "hothouse alien" species

These freshwater species are not truly part of the fauna, because they do not live in the wild. They are tropical, and thus are incapable of surviving in the wild in Ireland; instead they have established themselves as uninvited inhabitants of aquaria within greenhouses, and similar artificially-heated aquatic habitats. ;

- aquatic * ''

Radix rubiginosa ''Radix rubiginosa'' is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod in the family Lymnaeidae, the pond snails. This species is sometimes treated as a subspecies of ''Radix auricularia''. Distribution This spe ...

'' (Michelin, 1831), native to Indo-China and Indonesia ;

- aquatic * ''

Planorbella duryi ''Planorbella duryi'', common name the Seminole rams-horn, is a species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails. The species is endemic to Florida and is found frequently ...

'' (Wetherby, 1879)

References

*Hayden, B. & Caffrey, J.M. 2013 First recording of the Asian clam (''Corbicula fluminea'' (Müller, 1774)) from the River Shannon, with preliminary notes on population size and size class distribution. ''Irish Naturalists' Journal'' 32: 29-31

External links

An annotated list of the non-marine molluscs of Britain and IrelandThe Living World of Snails
Robert Nordsieck Austria Highly recommended site
MolluscIrelandInvertebrate Ireland Online
Partially illustrated checklist
Northern Ireland's Priority Species & Species of Conservation Concern. Molluscs.

Conchological Society
Identification help.
BDH
Taylor, John William, Roebuck, William Denison and Ashford, Charles, 1829-1894 ''Monograph of the land & freshwater Mollusca of the British isles'' Leeds, Taylor Brothers Parts 8 -24. (all part
U.S. Archive
*

National Biodiversity Network The National Biodiversity Network (UK) (NBN) is a collaborative venture set up in 2000 in the United Kingdom committed to making biodiversity information available through various media, including on the internet via the NBN Atlas—the data searc ...

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Species distribution maps
Irish Biodiversity Maps - including non-marine molluscsMolluscs of Central Europe
Taxonomy. Images
L. Watson and M. J. Dallwitz The families of British non-marine molluscs (slugs, snails and mussels)Mollusca Slovenska
Ecology Distribution (in text) {{DEFAULTSORT:Molluscs Lists of biota of Ireland, moll

Conservation

Regional Red List of Irish non-marine molluscs

Systematic list

Gastropoda

Bivalvia

List of "hothouse alien" species

See also

References

Further reading

External links