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Popular traits
12 sphaerium species
Sphaerium simile
Sphaerium striatinum
Sphaerium occidentale
Sphaerium transversum
Sphaerium rhomboideum
Sphaerium patella
Sphaerium nitidum
Sphaerium fabale
Sphaerium corneum
Sphaerium solidum
Sphaerium rivicola
Sphaerium subtransversum
At least 12 characters with a letter and a number.
