Planorbella trivolvis

Planorbella trivolvis is a species of freshwater air-breathing snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids, which all have sinistral or left-coiling shells.

Description
All species within family Planorbidae have sinistral shells. The width of the shell of this species is up to 18 mm.

Distribution
This pond snail is native to North America, from the Arctic areas of Canada all the way south to Florida. It has also been introduced in other parts of the world.


 * Peru
 * Dominica

Habitat
This species prefers habitats with floating water weeds.

Parasites

 * Planorbella trivolvis is an intermediate host for Echinostoma trivolvis.