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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Mollusca (clams, snails, squids, and relatives)
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Class Gastropoda
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Order Nudibranchia
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Superfamily Acleioprocta
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Family Actinocyclidae
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Family Aegiridae
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Family Aeolidiidae
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Family Aldisidae
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Family Archidorididae
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Family Arminidae
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Family Asteronotidae
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Family Babakinidae
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Family Chromodorididae
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Family Conualeviidae
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Family Corambidae
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Superfamily Cryptobranchia
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Family Cumanotidae
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Family Dendrodorididae
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Family Dendronotidae
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Superfamily Dendronotoidea
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Family Dironidae
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Family Discodorididae
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Family Dorididae
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Family Dotoidae
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Superfamily Euarminoidea
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Family Eubranchidae
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Family Facelinidae
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Family Fionidae
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Family Flabellinidae
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Family Glaucidae
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Family Goniodorididae
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Family Gymnodorididae
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Family Hancockiidae
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Family Janolidae
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Family Kentrodorididae
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Superfamily Leptognatha
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Family Lomanotidae
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Family Onchidorididae
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Superfamily Pachygnatha
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Family Phyllidiidae
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Family Phylliroidae
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Family Platydorididae
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Family Polyceridae
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Family Rostangidae
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Family Scyllaeidae
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Family Tergipedidae
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Family Tethydidae
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Family Triophidae
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Family Tritoniidae
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Family Zephyrinidae
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