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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Tardigrada (water bears)
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Class Heterotardigrada
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Order Arthrotardigrada
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Family Halechiniscidae
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Genus Actinarctus
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Species Actinarctus doryphorus
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Species Actinarctus lyrophorus
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Species Actinarctus neretinus
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Species Actinarctus physophorus
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