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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 Panagrolaimidae
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Genus Macrolaimus
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Species Macrolaimus aculeatus
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Species Macrolaimus crucis
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Species Macrolaimus hamatus
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Species Macrolaimus natator
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Species Macrolaimus taurus
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