English: Great ramshorn in Kirchwerder, Hamburg
Deutsch: Posthornschnecke in Kirchwerder, Hamburg
Date 2 May 2010
Author Aiwok https://commons.wikimedia.org/wiki/User:Aiwok
Source: https://commons.wikimedia.org/wiki/File:Planorbarius_corneus_1.JPG

The great ramshorn snail (Planorbarius corneus) is a relatively large species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae. The shell of this species appears to be dextral in coiling, even though it is in fact sinistral or left-handed.