Appearance
The height of an adult shell of this species ranges from 45–60 mm. The width of an adult shell ranges from 20–30 mm.
Distribution
The distribution of this species is Holarctic. It is widely distributed, and is common in many countries and islands including:Belgium, British Isles: Great Britain and Ireland, Canada, Cambodia, Czech Republic – least concern, Germany – distributed in whole Germany but in 2 states in red list, Netherlands, Poland, Russia, Slovakia, Sweden, Switzerland, Ukraine. United States – "Lymnaea stagnalis appressa".
Behavior
"Lymnaea stagnalis" is a simultaneously hermaphroditic species and can mate in the male and female role, but within one copulation only one sexual role is performed at a time. "Lymnaea stagnalis" perform more inseminations in larger groups and prefer to inseminate novel over familiar partners. Such higher motivation to copulate when a new partner is encountered is known as the Coolidge effect and has been demonstrated in hermaphrodites firstly in 2007.
Habitat
This large snail lives only in freshwater: it prefers slowly running water, and standing water bodies.References:
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