Kessneria
Kessneria is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.
All species within family Planorbidae have sinistral shells.
Kessneria is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.
All species within family Planorbidae have sinistral shells.