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)

Quadrangular Pillclam (Pisidium milium)

Shiny Peaclam (Pisidium nitidum)

Globular Peaclam (Pisidium ventricosum)

Short-end Peaclam (Pisidium subtruncatum)

Rusty Peaclam (Pisidium ferrugineum)

Ubiquitous Peaclam (Pisidium casertanum)

Arctic Fingernailclam (Sphaerium nitidum)

Ridged-beak Peaclam (Pisidium compressum)

Swamp Fingernailclam (Musculium partumeium)

Lake Fingernailclam (Musculium lacustre)

Fat Peaclam (Pisidium rotundatum)

Striate Peaclam (Pisidium punctiferum)

Lilljeborg Peaclam (Pisidium lilljeborgi)

Striated Fingernailclam (Sphaerium striatinum)

Herrington Fingernailclam (Sphaerium occidentale)

Triangular Peaclam (Pisidium variabile)

Mussels (Unionoida)

Margaritiferid Mussels (Margaritiferidae)

Western Pearlshell (Margaritifera falcata)

Unionid Mussels (Unionidae)

Winged Floater (Anodonta nuttalliana)

Oregon Floater (Anodonta oregonensis)

California Floater (Anodonta californiensis)

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)

Northwest Bonneville Pyrg (Pyrgulopsis variegata)

Ninemile Pyrg (Pyrgulopsis nonaria)

Santa Clara Pyrg (Pyrgulopsis santaclarensis)

Pine Grove Pyrg (Pyrgulopsis pinetorum)

Southern Bonneville Springsnail (Pyrgulopsis transversa)

Desert Springsnail (Pyrgulopsis deserta)

Otter Creek Pyrg (Pyrgulopsis fusca)

Carinate Glenwood Pyrg (Pyrgulopsis inopinata)

Bifid Duct Pyrg (Pyrgulopsis peculiaris)

Lindahl's Pyrg (Pyrgulopsis lindahlae)

Nuwuvi Pyrg (Pyrgulopsis nuwuvi)

Hamlin Valley Pyrg (Pyrgulopsis hamlinensis)

Sub-globose Snake Pyrg (Pyrgulopsis saxatilis)

Black Canyon Pyrg (Pyrgulopsis plicata)

Smooth Glenwood Pyrg (Pyrgulopsis chamberlini)

Longitudinal Gland Pyrg (Pyrgulopsis anguina)

Toquerville Springsnail (Pyrgulopsis kolobensis)

Bear Lake Springsnail (Pyrgulopsis pilsbryana)

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)

Striate Disc (Discus shimekii)

Forest Disc (Discus whitneyi)

Hives (Helicarionidae)

Brown Hive (Euconulus fulvus)

Helicidae

Brown Gardensnail (Cornu aspersum)

Helicodiscidae

Mexican Coil (Helicodiscus eigenmanni)

Field / Garden Slugs (Limacidae)

Giant Gardenslug (Limax maximus)

Meadow Slug (Deroceras laeve)

Gray Fieldslug (Deroceras reticulatum)

Mountain Snails (Oreohelicidae)

Oreohelix spp. (Oreohelix spp.)

Yavapai Mountainsnail (Oreohelix yavapai)

Subalpine Mountainsnail (Oreohelix subrudis)

Brian Head Mountainsnail (Oreohelix parawanensis)

Deseret Mountainsnail (Oreohelix peripherica peripherica)

[a Race of the] Yavapai Mountainsnail (Oreohelix yavapai cummingsi)

Mill Creek Mountainsnail (Oreohelix howardi)

Eureka Mountainsnail (Oreohelix eurekensis)

Rocky Mountainsnail (Oreohelix strigosa)

Wasatch Mountainsnail (Oreohelix peripherica wasatchensis)

Deseret Mountainsnail (Oreohelix peripherica)

Corrugated Mountainsnail (Oreohelix haydeni corrugata)

Lyrate Mountainsnail (Oreohelix haydeni)

Spots (Punctidae)

Small Spot (Punctum minutissimum)

Columns / Vertigos (Pupillidae)

Mitered Vertigo (Vertigo modesta concinnula)

Cross Snaggletooth (Gastrocopta quadridens)

Ribbed Dagger (Pupoides hordaceus)

Mellow Column (Columella columella)

Widespread Column (Pupilla muscorum)

White-lip Dagger (Pupoides albilabris)

Sluice Snaggletooth (Gastrocopta ashmuni)

Tapered Vertigo (Vertigo ventricosa)

Montane Snaggletooth (Gastrocopta pilsbryana)

Crestless Column (Pupilla hebes)

Ovate Vertigo (Vertigo ovata)

Top-heavy Column (Pupilla syngenes)

Cross Vertigo (Vertigo modesta)

Columbia Vertigo (Vertigo columbiana)

Pupilla sonorana

Slim Snaggletooth (Gastrocopta pellucida)

Rocky Mountain Column (Pupilla blandii)

Colorado Vertigo (Vertigo coloradensis)

Ambersnails (Succineidae)

Humboldt Ambersnail (Oxyloma sillimani)

Niobrara Ambersnail (Oxyloma haydeni)

Santa Rita Ambersnail (Succinea grosvenori)

Oregon Ambersnail (Succinea oregonensis)

Sierra Ambersnail (Catinella stretchiana)

Rustic Ambersnail (Succinea rusticana)

Oblique Ambersnail (Oxyloma nuttallianum)

Suboval Ambersnail (Catinella vermeta)

Boundary Ambersnail (Oxyloma hawkinsii)

Blunt Ambersnail (Oxyloma retusum)

Kanab Ambersnail (Oxyloma kanabense)

Spruce Snails (Thysanophoridae)

Spruce Snail (Microphysula ingersollii)

Vallonias (Valloniidae)

Silky Vallonia (Vallonia cyclophorella)

Multirib Vallonia (Vallonia gracilicosta)

Lovely Vallonia (Vallonia pulchella)

Thin-lip Vallonia (Vallonia perspectiva)

Indecisive Vallonia (Vallonia albula)

Glass-snails (Vitrinidae)

Western Glass-snail (Vitrina pellucida)

Gems / Glasses / Glosses (Zonitidae)

Southern Tightcoil (Ogaridiscus subrupicola)

Quick Gloss (Zonitoides arboreus)

Texas Glyph (Glyphyalinia umbilicata)

Carved Glyph (Glyphyalinia indentata)

Blue Glass (Nesovitrea binneyana)

Amber Glass (Nesovitrea electrina)

Striate Gem (Hawaiia neomexicana)

Minute Gem (Hawaiia minuscula)

Black Gloss (Zonitoides nitidus)

Aquatic Snails (Basommatophora)

Fossarias / Pondsnails / Lanxs (Lymnaeidae)

Prairie Fossaria (Galba bulimoides)

Mountain Marshsnail (Stagnicola montanensis)

Rock Fossaria (Galba modicella)

Fish Springs Marshsnail (Stagnicola pilsbryi)

[No Common Name] (Galba rustica)

Fisherola nuttalli

Fat-whorled Pondsnail (Stagnicola bonnevillensis)

Golden Fossaria (Galba obrussa)

Swamp Lymnaea (Lymnaea stagnalis)

[No Common Name] (Galba techella)

Pygmy Fossaria (Galba parva)

Wrinkled Marshsnail (Stagnicola caperata)

Thickshell Pondsnail (Stagnicola utahensis)

Marsh Pondsnail (Stagnicola elodes)

Widelip Pondsnail (Stagnicola traski)

Big-ear Radix (Radix auricularia)

Dusky Fossaria (Galba dalli)

Physas (Physidae)

Lance Aplexa (Aplexa elongata)

Tadpole Physa (Physa gyrina)

Twisted Physa (Physella lordi)

Protean Physa (Physa acuta)

Cloaked Physa (Physa megalochlamys)

Olive Physa (Physella cooperi)

Fish Lake Physa (Physella microstriata)

Rocky Mountain Physa (Physella propinqua)

Cayuse Physa (Physella osculans)

Wet-rock Physa (Physella zionis)

Glass Physa (Physa skinneri)

Utah Physa (Physa gyrina utahensis)

Sprites / Gyros / Rams-horns (Planorbidae)

Lamb Rams-horn (Planorbella oregonensis)

Flexed Gyro (Gyraulus deflectus)

Coarse Rams-horn (Planorbella binneyi)

Umbilicate Sprite (Promenetus umbilicatellus)

Creeping Ancylid (Ferrissia rivularis)

Great Basin Rams-horn (Helisoma newberryi)

Meadow Rams-horn (Planorbula campestris)

[No Common Name] (Planorbella subcrenata)

Two-ridged Rams-horn (Helisoma anceps)

Sharp Sprite (Promenetus exacuous)

Disc Gyro (Gyraulus circumstriatus)

Marsh Rams-horn (Planorbella trivolvis)

Button Sprite (Menetus opercularis)

Ash Gyro (Gyraulus parvus)

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.