Planorbis parvus[3]Planorbis similarisPlanorbis vermicularis Gyraulus parvus is a species of freshwater snail in the family Planorbidae, the ram's horn snails.

[1][4][5] It is native to much of North America and the Caribbean, where it occurs in Canada, the United States, Mexico, Hispaniola, Jamaica, Cuba, and Puerto Rico.

It is also an introduced species in Eurasia, including Austria, the Czech Republic, France, Germany, and Israel.

[1] This common snail occurs in many types of freshwater habitat, such as ponds and lakes.

[4] This snail has a thin, transparent, whitish-gray shell measuring 2.5 to 5 millimeters wide.