the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > order Pulmonifera > Inoperculata > family Limnaeidae or Planorbidae > genus Planorbis > member of (2)
In full post-horn pond snail. A ramshorn snail of Europe and the Middle East, Planorbarius corneus. Now rare.
a pond-snail of the genus Planorbis, having its shell coiled in a plane.