Alimov & Starobogatov. 1968. Moll. & Role in Ecosyst..
Alimov & Starobogatov, 1968. Moll. & Role in Ecosyst.: 15.
Type species: Cyclas scaldiana Normand, 1844 = Sphaerium nucleus
Alimov & Starobogatov, 1968. Moll. & Role in Ecosyst.: 14.
Type species: Cyclas nucleus Studer, 1820 = Sphaerium nucleus
Alimov & Starobogatov, 1968. Moll. & Role in Ecosyst.: 15.
Type species: Cyclas transversa Say, 1829 = Sphaerium transversum
Alimov & Starobogatov, 1968. Moll. & Role in Ecosyst.: 14.
Type species: Sphaerium rectidens Starobogatov & Streletzkaja, 1967 = Sphaerium nitidum