| 2. | Bouchet and Rocroi use six main clades: Patellogastropoda, Vetigastropoda, Cocculiniformia, Neritimorpha, Caenogastropoda, and Heterobranchia. Bouchet et Rocroi utilisent six principaux clades : Patellogastropoda, Vetigastropoda, Cocculiniformia, Neritimorpha, Caenogastropoda et Heterobranchia. |