Valvatoidea

Valvatoidea is a superfamily of minute freshwater and marine snails, aquatic gastropod mollusks in the informal group Lower Heterobranchia.[1]

Valvatoidea
a live Valvata piscinalis
Five shells of Valvata macrostoma
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
informal group Lower Heterobranchia
Superfamily:
Valvatoidea

Gray, 1840

Taxonomy
gollark: ++exec```haskellimport Unsafe.Coercedata Would = Seriously Why Int deriving Showtype Mad = ()data Are = Are Mad deriving Showtype Is = Aredata You = You Are Mad deriving Showdata Thing = This Thing Is Mad deriving Showdata This = Thing Mad deriving Shownewtype Do = Do (Thing -> You -> [Thing])data Why = Why Would You Do This deriving Showinstance Show Do where show x = "Do the thing!"why :: Whywhy = Why would you do_ this where would = unsafeCoerce why you = You (Are ()) () do_ = Do $ \_ _ -> [] this = Thing ()main = print why```
gollark: Gooood.
gollark: ++exec```haskellimport Unsafe.Coercedata Would = Seriously Why Int deriving Showtype Mad = ()data Are = Are Mad deriving Showtype Is = Aredata You = You Are Mad deriving Showdata Thing = This Thing Is Mad deriving Showdata This = Thing Mad deriving Shownewtype Do = Do (Thing -> You -> [Thing])data Why = Why Would You Do This deriving Showinstance Show Do where show x = "Do the thing!"why :: Whywhy = Why would you do_ this where would = unsafeCoerce () you = You (Are ()) () do_ = Do $ \_ _ -> [] this = Thing ()main = print why```
gollark: It works!
gollark: ++exec```haskelldata Would = Seriously Why Int deriving Showtype Mad = ()data Are = Are Mad deriving Showtype Is = Aredata You = You Are Mad deriving Showdata Thing = This Thing Is Mad deriving Showdata This = Thing Mad deriving Shownewtype Do = Do (Thing -> You -> [Thing])data Why = Why Would You Do This deriving Showinstance Show Do where show x = "Do the thing!"why :: Whywhy = Why would you do_ this where would = Seriously why 0 you = You (Are ()) () do_ = Do $ \_ _ -> [] this = Thing ()main = print why```

References
  1. Bouchet, P. & Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2).


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