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Acochlidiacea

Anaspidea

Architaenioglossa

Cephalaspidea

Cycloneritimorpha

Gymnosomata

Hygrophila

Littorinimorpha

Neogastropoda

Nudibranchia

Pleurobranchomorpha

Runcinacea

Sacoglossa

Stylommatophora

Systellommatophora

Thecosomata

Umbraculida