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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Class Secernentea
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Order Rhabditida
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Family Rhabditidae
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Genus Caenorhabditis
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Species Caenorhabditis briggsae
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Species Caenorhabditis dolichura
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Species Caenorhabditis elegans
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Species Caenorhabditis rara
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