Sphaerium
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Sphaerium (Anglice: fingernail clam) est aquae dulcis genus magnitudinis minimae molluscorum bivalvium familiae Sphaeriidarum.
Testae Sphaerii cornei
Classis : Bivalvia
Subclassis : Heterodonta
Ordo : Veneroida
Subordo : Sphaeriacea
Familia : Sphaeriidae
Genus : Sphaerium
Scopoli, 1777
Subclassis : Heterodonta
Ordo : Veneroida
Subordo : Sphaeriacea
Familia : Sphaeriidae
Genus : Sphaerium
Scopoli, 1777
Nonnulla huius generis species, sicut Sphaerium corneum, super plantas aquatiles scandere possunt, pede longo validoque adhibentes.