Bourguignat, J.R. 1854. Aménités malacologiques XIX. Nouvelle distribution des Sphéries françaises. Revue et Magasin de Zoologie 6: 664-670. https://www.biodiversitylibrary.org/page/13681729.
(intro'd as sub-gen. of Sphaerium Scopoli, 1777)
Bourguignat, 1854. Rev. Mag. Zool. 6: 668.
Bourguignat, 1854. Rev. Mag. Zool. 6: 674.
Type species: Cyclas solida Normand, 1844 (orig. desig.) = Sphaerium solidum
(intro'd as sub-gen. of Sphaerium Scopoli, 1777)
Bourguignat, 1854. Rev. Mag. Zool. 6: 668.
Bourguignat, 1854. Rev. Mag. Zool. 6: 674.
Type species: Cyclas rivicola Lamarck, 1818 = Sphaerium rivicola