# List of non-marine molluscs of Montana

The non-marine mollusks of Montana — a part of the molluscan fauna of the state in the Northwestern United States. The non-marine mollusks of Montana consist of land snails and slugs as well as freshwater snails, freshwater mussels and freshwater clams.

## Species

A number of species of non-marine molluscs are found in the wild in Montana.

### Gastropods

There at least 155 species of gastropods found in Montana. Some of these species are exotics (not native to Montana) and some species have been designated as Species of Concern.

### Freshwater bivalves

There are at least 42 species of freshwater bivalves known in Montana. The Montana Department of Fish, Wildlife and Parks has identified a number of bivalve species as Species of Concern.

## List of non-marine molluscs

Summary table of number of species: :
| Numbers of molluscs by habitat | Number of species |
| Freshwater gastropods | ?? |
| Land gastropods | ?? |
| Total number of non-marine gastropods | 155 |
| Freshwater bivalves | 42 |
| Total number of non-marine molluscs | 197 |

## Freshwater gastropods

Freshwater gastropods in Montana include:
Bithyniidae
* Bithynia tentaculata
Thiaridae
* Melanoides tuberculata
Valvatidae
* Valvata lewisi
* Valvata humeralis
* Valvata sincera
* Valvata tricarinata
Hydrobiidae
* Pyrgulopsis bedfordensis
* Fluminicola fuscus
* Probythinella emarginata
* Potamopyrgus antipodarum
* Colligyrus greggi
* Amnicola limosa
* an undescribed species of Amnicola, currently known as "Lake Amnicola" or "Amnicola sp. 1"
Acroloxidae
* Acroloxus coloradensis
Lymnaeidae
* Stagnicola apicina
* Radix auricularia
* Fossaria dalli
* Stagnicola elrodi
* Fossaria obrussa
* Stagnicola elrodiana
* Fossaria humilis
* Stagnicola elodes
* Pseudosuccinea columella
* Stagnicola montanensis
* Fossaria bulimoides
* Fossaria parva
* Fossaria modicella
* Fisherola nuttalli
* Lymnaea stagnalis
* Stagnicola traski
* Stagnicola catascopium
* Stagnicola caperata
Physidae
* Physella vinosa
* Physa skinneri
* Aplexa elongata
* Physa megalochlamys
* Physa jennessi
* Physella acuta
* Physella virgata
* Physella propinqua
* Physella columbiana
* Physella gyrina
* Physella lordi
* Physella zionis
Planorbidae
* Gyraulus parvus
* Menetus opercularis
* Gyraulus circumstriatus
* Planorbella pilsbryi
* Gyraulus deflectus
* Planorbella trivolvis
* Planorbula campestris
* Promenetus exacuous megas
* Planorbella subcrenata
* Promenetus exacuous
* Gyraulus crista
* Planorbula armigera
* Helisoma anceps
* Promenetus umbilicatellus
* Ferrissia rivularis
* Ferrissia fragilis
* Ferrissia parallelus

## Land gastropods

Land gastropods in Montana include:
Succineidae
* Catinella rehderi
* Catinella vermeta
* Oxyloma decampi
* Oxyloma gouldi
* Oxyloma haydeni
* Oxyloma missoula
* Oxyloma nuttallianum
* Oxyloma retusum
* Succinea grosvenori
Arionidae
* Arion ater
* Arion circumscriptus
* Arion distinctus
* Arion fasciatus
* Arion intermedius
* Arion rufus
* Arion subfuscus
* Hemphillia camelus
* Hemphillia danielsi
* Kootenaia burkei
* Magnipelta mycophaga
* Prophysaon andersoni
* Prophysaon humile
* Udosarx lyrata - with subspecies: Udosarx lyrata lyrata and Udosarx lyrata russelli
* Zacoleus idahoensis
Megomphicidae
* Polygyrella polygyrella
Vertiginidae
* Columella columella
* Columella edentula
* Gastrocopta armifera
* Gastrocopta holzingeri
* Gastrocopta pentodon
* Vertigo binneyana
* Vertigo concinnula
* Vertigo cristata
* Vertigo elatior
* Vertigo gouldi
* Vertigo modesta
* Vertigo ovata
Pupillidae
* Pupilla blandi
* Pupilla hebes
* Pupilla muscorum
* Pupilla syngenes
Discidae
* Anguispira kochi
* Discus whitneyi
* Discus brunsoni
* Discus shimekii
Limacidae
* Limax maximus
Agriolimacidae
* Deroceras laeve
* Deroceras panormitanum
* Deroceras reticulatum
Oxychilidae
* Nesovitrea electrina
* Nesovitrea binneyana
* Oxychilus draparnaudi
* Oxychilus alliarius
Gastrodontidae
* Striatura pugetensis
* Zonitoides arboreus
* Zonitoides nitidus
Pristilomatidae
* Hawaiia minuscula
* Pristiloma arcticum
* Pristiloma chersinella
* Pristiloma wascoense
Vitrinidae
* Vitrina pellucida
Euconulidae
* Euconulus fulvus
Haplotrematidae
* Haplotrema vancouverense
Oreohelicidae
* Oreohelix alpina
* Oreohelix amariradix
* Oreohelix carinifera
* Oreohelix elrodi
* Oreohelix haydeni
* Oreohelix pygmaea
* Oreohelix strigosa - with subspecies: Oreohelix strigosa berryi and Oreohelix strigosa depressa
* Oreohelix subrudis
* Oreohelix yavapai - with subspecies: Oreohelix yavapai mariae
Polygyridae
* Allogona ptychophora
* Cryptomastix mullani
* Cryptomastix sanburni
Cochlicopidae
* Cochlicopa lubrica
Charopidae
* Radiodiscus abietum
Punctidae
* Paralaoma caputspinulae
* Punctum randolphi
* Punctum californicum
* Punctum minutissimum
Thysanophoridae
* Microphysula ingersolli
Valloniidae
* Vallonia albula
* Vallonia costata
* Vallonia cyclophorella
* Vallonia gracilicosta
* Vallonia perspectiva
* Vallonia pulchella
* Zoogenetes harpa

## Freshwater bivalves

Freshwater bivalves in Montana include:
Margaritiferidae
* Margaritifera falcata
Unionidae
* Lampsilis siliquoidea
* Lasmigona complanata
* Ligumia recta
* Pyganodon grandis
* Quadrula quadrula
Sphaeriidae
* Musculium lacustre
* Musculium partumeium
* Musculium securis
* Musculium transversum
* Pisidium adamsi
* Pisidium arbortivum
* Pisidium casertanum
* Pisidium compressum
* Pisidium conventus
* Pisidium fallax
* Pisidium ferrugineum
* Pisidium idahoense
* Pisidium imbecille
* Pisidium insigne
* Pisidium lilljeborgii
* Pisidium milium
* Pisidium nitidum
* Pisidium obtusale
* Pisidium ovum
* Pisidium roperi
* Pisidium rotundatum
* Pisidium scutulatum
* Pisidium subtruncatum
* Pisidium variabile - with subspecies: Pisidium variabile magnum
* Pisidium ventricosum
* Pisidium walkeri
* Sphaerium fabale
* Sphaerium nitidum
* Sphaerium occidentale
* Sphaerium patella
* Sphaerium rhomboideum
* Sphaerium simile
* Sphaerium striatinum
* Sphaerium sulcatum
* Sphaerium tenue