Soft bodied animals with an internal or external shell and a toothed tongue or radula. Have a mantle that lines and secretes the shell and a muscular foot that allows for movement.

Mussels / Clams (Bivalvia)

Two hinged lateral shells and a wedged shaped "foot". Bivalves lack tentacles and a head.

Finger / Pea Clams (Veneroida)

Corbiculidae

Asian clam (Corbicula fluminea)

Fingerclams / Peaclams (Sphaeriidae)

Lilljeborg peaclam (Pisidium lilljeborgi)

Striate peaclam (Pisidium punctiferum)

Ubiquitous peaclam (Pisidium casertanum)

Swamp fingernailclam (Musculium partumeium)

Short-end peaclam (Pisidium subtruncatum)

Rusty peaclam (Pisidium ferrugineum)

Lake fingernailclam (Musculium lacustre)

Herrington fingernailclam (Sphaerium occidentale)

Ridged-beak peaclam (Pisidium compressum)

Arctic fingernailclam (Sphaerium nitidum)

Striated fingernailclam (Sphaerium striatinum)

Triangular peaclam (Pisidium variabile)

Globular peaclam (Pisidium ventricosum)

Shiny peaclam (Pisidium nitidum)

Fat peaclam (Pisidium rotundatum)

Quadrangular pillclam (Pisidium milium)

Mussels (Unionoida)

Margaritiferid Mussels (Margaritiferidae)

Western pearlshell (Margaritifera falcata)

Unionid Mussels (Unionidae)

California floater (Anodonta californiensis)

Oregon floater (Anodonta oregonensis)

Winged floater (Anodonta nuttalliana)

Snails / Slugs (Gastropoda)

Usually have chambered shells.

Littorinimorpha

Amnicolidae

Mud amnicola (Amnicola limosa)

Rocky mountain duskysnail (Colligyrus greggi)

Cochliopidae

Desert tryonia (Tryonia porrecta)

Amnicolas / Duskysnails (Hydrobiidae)

Otter creek pyrg (Pyrgulopsis fusca)

Southern bonneville springsnail (Pyrgulopsis transversa)

Bifid duct pyrg (Pyrgulopsis peculiaris)

Sub-globose snake pyrg (Pyrgulopsis saxatilis)

Santa clara pyrg (Pyrgulopsis santaclarensis)

Pine grove pyrg (Pyrgulopsis pinetorum)

Smooth glenwood pyrg (Pyrgulopsis chamberlini)

Longitudinal gland pyrg (Pyrgulopsis anguina)

Toquerville springsnail (Pyrgulopsis kolobensis)

Desert springsnail (Pyrgulopsis deserta)

Lindahl's pyrg (Pyrgulopsis lindahlae)

Carinate glenwood pyrg (Pyrgulopsis inopinata)

Black canyon pyrg (Pyrgulopsis plicata)

Bear lake springsnail (Pyrgulopsis pilsbryana)

Ninemile pyrg (Pyrgulopsis nonaria)

Northwest bonneville pyrg (Pyrgulopsis variegata)

Nuwuvi pyrg (Pyrgulopsis nuwuvi)

Hamlin valley pyrg (Pyrgulopsis hamlinensis)

Lithoglyphidae

Green river pebblesnail (Fluminicola coloradoensis)

Pristine pyrg (Pristinicola hemphilli)

Tateidae

New zealand mudsnail (Potamopyrgus antipodarum)

Terrestrial Snails / Slugs (Stylommatophora)

Pillar Snails (Cionellidae)

Glossy pillar snail (Cochlicopa lubrica)

Discs (Discidae)

Forest disc (Discus whitneyi)

Striate disc (Discus shimekii)

Hives (Helicarionidae)

Brown hive (Euconulus fulvus)

Helicidae

Brown gardensnail (Cornu aspersum)

Helicodiscidae

Mexican coil (Helicodiscus eigenmanni)

Field / Garden Slugs (Limacidae)

Gray fieldslug (Deroceras reticulatum)

Giant gardenslug (Limax maximus)

Meadow slug (Deroceras laeve)

Mountain Snails (Oreohelicidae)

Eureka mountainsnail (Oreohelix eurekensis)

Yavapai mountainsnail (Oreohelix yavapai)

Wasatch mountainsnail (Oreohelix peripherica wasatchensis)

Mill creek mountainsnail (Oreohelix howardi)

Rocky mountainsnail (Oreohelix strigosa)

Brian head mountainsnail (Oreohelix parawanensis)

Deseret mountainsnail (Oreohelix peripherica peripherica)

Deseret mountainsnail (Oreohelix peripherica)

Corrugated mountainsnail (Oreohelix haydeni corrugata)

Subalpine mountainsnail (Oreohelix subrudis)

[a race of the] yavapai mountainsnail (Oreohelix yavapai cummingsi)

Oreohelix spp. (Oreohelix spp.)

Lyrate mountainsnail (Oreohelix haydeni)

Spots (Punctidae)

Small spot (Punctum minutissimum)

Columns / Vertigos (Pupillidae)

Pupilla sonorana

White-lip dagger (Pupoides albilabris)

Montane snaggletooth (Gastrocopta pilsbryana)

Crestless column (Pupilla hebes)

Tapered vertigo (Vertigo ventricosa)

Rocky mountain column (Pupilla blandii)

Ribbed dagger (Pupoides hordaceus)

Slim snaggletooth (Gastrocopta pellucida)

Colorado vertigo (Vertigo coloradensis)

Mitered vertigo (Vertigo modesta concinnula)

Mellow column (Columella columella)

Widespread column (Pupilla muscorum)

Top-heavy column (Pupilla syngenes)

Sluice snaggletooth (Gastrocopta ashmuni)

Cross snaggletooth (Gastrocopta quadridens)

Ovate vertigo (Vertigo ovata)

Cross vertigo (Vertigo modesta)

Columbia vertigo (Vertigo columbiana)

Ambersnails (Succineidae)

Suboval ambersnail (Catinella vermeta)

Boundary ambersnail (Oxyloma hawkinsii)

Sierra ambersnail (Catinella stretchiana)

Niobrara ambersnail (Oxyloma haydeni)

Rustic ambersnail (Succinea rusticana)

Oblique ambersnail (Oxyloma nuttallianum)

Santa rita ambersnail (Succinea grosvenori)

Humboldt ambersnail (Oxyloma sillimani)

Kanab ambersnail (Oxyloma kanabense)

Blunt ambersnail (Oxyloma retusum)

Oregon ambersnail (Succinea oregonensis)

Spruce Snails (Thysanophoridae)

Spruce snail (Microphysula ingersollii)

Vallonias (Valloniidae)

Multirib vallonia (Vallonia gracilicosta)

Thin-lip vallonia (Vallonia perspectiva)

Silky vallonia (Vallonia cyclophorella)

Lovely vallonia (Vallonia pulchella)

Indecisive vallonia (Vallonia albula)

Glass-snails (Vitrinidae)

Western glass-snail (Vitrina pellucida)

Gems / Glasses / Glosses (Zonitidae)

Striate gem (Hawaiia neomexicana)

Texas glyph (Glyphyalinia umbilicata)

Carved glyph (Glyphyalinia indentata)

Amber glass (Nesovitrea electrina)

Blue glass (Nesovitrea binneyana)

Black gloss (Zonitoides nitidus)

Quick gloss (Zonitoides arboreus)

Minute gem (Hawaiia minuscula)

Southern tightcoil (Ogaridiscus subrupicola)

Aquatic Snails (Basommatophora)

Fossarias / Pondsnails / Lanxs (Lymnaeidae)

Rock fossaria (Galba modicella)

Swamp lymnaea (Lymnaea stagnalis)

Golden fossaria (Galba obrussa)

Marsh pondsnail (Stagnicola elodes)

Thickshell pondsnail (Stagnicola utahensis)

Widelip pondsnail (Stagnicola traski)

Fish springs marshsnail (Stagnicola pilsbryi)

[No common name] (Galba rustica)

Big-ear radix (Radix auricularia)

Fisherola nuttalli

Fat-whorled pondsnail (Stagnicola bonnevillensis)

Dusky fossaria (Galba dalli)

Mountain marshsnail (Stagnicola montanensis)

[No common name] (Galba techella)

Pygmy fossaria (Galba parva)

Wrinkled marshsnail (Stagnicola caperata)

Prairie fossaria (Galba bulimoides)

Physas (Physidae)

Cloaked physa (Physa megalochlamys)

Tadpole physa (Physa gyrina)

Fish lake physa (Physella microstriata)

Wet-rock physa (Physella zionis)

Utah physa (Physa gyrina utahensis)

Glass physa (Physa skinneri)

Protean physa (Physa acuta)

Twisted physa (Physella lordi)

Lance aplexa (Aplexa elongata)

Olive physa (Physella cooperi)

Rocky mountain physa (Physella propinqua)

Cayuse physa (Physella osculans)

Sprites / Gyros / Rams-horns (Planorbidae)

Ash gyro (Gyraulus parvus)

Coarse rams-horn (Planorbella binneyi)

Umbilicate sprite (Promenetus umbilicatellus)

Disc gyro (Gyraulus circumstriatus)

[No common name] (Planorbella subcrenata)

Sharp sprite (Promenetus exacuous)

Marsh rams-horn (Planorbella trivolvis)

Two-ridged rams-horn (Helisoma anceps)

Creeping ancylid (Ferrissia rivularis)

Great basin rams-horn (Helisoma newberryi)

Meadow rams-horn (Planorbula campestris)

Lamb rams-horn (Planorbella oregonensis)

Flexed gyro (Gyraulus deflectus)

Button sprite (Menetus opercularis)

Caenogastropoda

Melanias (Thiaridae)

Red-rim melania (Melanoides tuberculatus)

Quilted melania (Tarebia granifera)

Aquatic Snails (Heterostropha)

Valvatas (Valvatidae)

Glossy valvata (Valvata humeralis)

Desert valvata (Valvata utahensis)

Architaenioglossa

Viviparidae

Chinese mysterysnail (Cipangopaludina chinensis)

Segmented Worms (Annelida)

Long cylindrical body. Have a fluid-filled cavity (coelom) between the outer body wall and the gut that is typically segmented into a series of compartments.