Unio - Species Dictionary - Global : iSpot Nature - Your place to share nature. iSpot is a website aimed at helping anyone identify anything in nature. Once you've registered, you can add an observation to the website and suggest an identification yourself or see if anyone else can identify it for you.

Catalogue of Life
Animalia, Mollusca, Bivalvia, Unionoida, Unionoidea, Unionidae, Unio
Unio gibbus, Unio mancus, Unio tigridis, Unio terminalis, Unio abyssinicus, Unio elongatulus, Unio tumidiformis, Unio crassus, Unio pictorum, Unio tumidus