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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 Adenophorea
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Subclass Enoplia
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Order Dorylaimida
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Family Nygolaimidae
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Genus Nygellus
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Species Nygellus clavatus
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Species Nygellus subclavatus
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Species Nygellus symmetricus
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