(= Neritopsina)
![]() Helicina clappi (Helicinidae), a terrestrial relative of nerites from Florida. Picture: Robert Pilla (Jacksonville Shell Club). |
- Family Orthonychiidae †
- Family Vltaviellidae †
![]() Fresh water nerite (Theodoxus danasteri). View of the animal and its operculum. Picture: © Alexander Mrkvicka. |
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Systematics of Gastropoda.