| Lyogyrus pupoideus |
Pupa Duskysnail |
|
| Toxolasma lividum |
Purple Liliput |
|
| Cyclonaias tuberculata |
Purple Wartyback |
|
| Stenotrema pilula |
Pygmy Slitmouth |
|
| Vertigo pygmaea |
Pygmy Vertigo |
|
| Ventridens intertextus |
Pyramid Dome |
|
| Pleurobema rubrum |
Pyramid Pigtoe |
|
| Quadrula cylindrica cylindrica |
Rabbitsfoot |
|
| Theliderma cylindrica |
Rabbitsfoot |
High |
| Villosa iris |
Rainbow |
|
| Villosa fabalis |
Rayed Bean |
Very High |
| Pallifera ohioensis |
Redfoot Mantleslug |
|
| Geukensia demissa |
Ribbed Mussel |
|
| Striatura exigua |
Ribbed Striate Snail |
|
| Stenotrema edvardsi |
Ridge-and-valley Slitmouth |
|
| Lioplax subcarinata |
Ridged Lioplax |
|
| Elliptio roanokensis |
Roanoke Slabshell |
|
| Pleurobema plenum |
Rough Pigtoe |
Very High |
| Obovaria subrotunda |
Round Hickorynut |
High |
| Pisidium equilaterale |
Round Peaclam |
|
| Pleurobema sintoxia |
Round Pigtoe |
|
| Paravitrea reesei |
Round Supercoil |
|
| Ventridens lawae |
Rounded Dome |
|
| Helicodiscus lirellus |
Rubble Coil |
Very High |
| Glyphyalinia picea |
Rust Glyph |
Moderate |
| Simpsonaias ambigua |
Salamander Mussel |
High |
| Ventridens collisella |
Sculptured Dome |
|
| Mesodon mitchellianus |
Sealed Globelet |
|
| Leptoxis dilatata |
Seep Mudalia |
|
| Pallifera secreta |
Severed Mantleslug |
|
| Helicodiscus diadema |
Shaggy Coil |
Very High |
| Inflectarius inflectus |
Shagreen |
|
| Somatogyrus pennsylvanicus |
Shale Pebblesnail |
|
| Pleurocera acuta |
Sharp Hornsnail |
|
| Promenetus exacuous |
Sharp Sprite |
|
| Plethobasus cyphyus |
Sheepnose |
Very High |
| Fusconaia cor |
Shiny Pigtoe |
Very High |
| Paravitrea blarina |
Shrew Supercoil |
Moderate |
| Paravitrea ceres |
Sidelong Supercoil |
Very High |
| Vertigo morsei |
Six-whorl Vertigo |
|
| Pleuronaia dolabelloides |
Slabside Pearlymussel |
|
| Paravitrea subtilis |
Slender Supercoil |
|
| Pomatiopsis lapidaria |
Slender Walker |
|
| Gastrocopta pellucida |
Slim Snaggletooth |
|
| Alasmidonta viridis |
Slippershell Mussel |
|
| Vertigo parvula |
Smallmouth Vertigo |
Moderate |
| Patera laevior |
Smooth Bladetooth |
Very High |
| Mesomphix perlaevis |
Smooth Button |
|
| Lucilla singleyana |
Smooth Coil |
|
| Catinella hubrichti |
Snowhill Ambersnail |
|