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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Crustacea (shrimps, crabs, lobsters, water fleas, and relatives)
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Class Maxillopoda
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Class Malacostraca
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Order Isopoda
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Family Gnathiidae
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Genus Caecognathia
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Species Caecognathia abyssorum
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Species Caecognathia agwillisi
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Species Caecognathia akaroensis
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Species Caecognathia albescenoides
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Species Caecognathia amakusaensis
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Species Caecognathia antarctica
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Species Caecognathia bicolor
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Species Caecognathia branchyponera
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Species Caecognathia caeca
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Species Caecognathia calva
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Species Caecognathia consobrina
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Species Caecognathia coralliophila
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Species Caecognathia crenulatifrons
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Species Caecognathia diacamma
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Species Caecognathia dolichoderus
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Species Caecognathia elongata
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Species Caecognathia floridensis
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Species Caecognathia galzini
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Species Caecognathia gnamptogenys
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Species Caecognathia hirsuta
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Species Caecognathia hodgsoni
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Species Caecognathia huberia
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Species Caecognathia kikuchii
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Species Caecognathia leptanilla
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Species Caecognathia nasuta
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Species Caecognathia nipponensis
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Species Caecognathia pacifica
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Species Caecognathia paratrechia
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Species Caecognathia pilosipes
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Species Caecognathia polaris
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Species Caecognathia polythrix
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Species Caecognathia pustulosa
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Species Caecognathia regalis
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Species Caecognathia robusta
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Species Caecognathia saikaiensis
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Species Caecognathia samariensis
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Species Caecognathia sanctaecrucis
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Species Caecognathia schistifrons
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Species Caecognathia serrata
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Species Caecognathia stygia
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Species Caecognathia trachymesopus
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Species Caecognathia vanhoeffeni
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Species Caecognathia vemae
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Species Caecognathia wagneri
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