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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 Ascaridida
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Family Acanthocheilidae
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Family Anisakidae
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Family Ascarididae
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Family Ascaridiidae
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Family Atractidae
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Family Cosmocercidae
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Family Crossophoridae
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Family Cucullanidae
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Family Dioctophymatidae
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Family Goeziidae
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Family Heterakidae
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Family Heterocheilidae
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Family Kathlanidae
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Family Maupasinidae
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Family Oxyuridae
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Family Quimperiidae
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Family Rhigonematidae
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Family Schneidernematidae
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Family Seuratidae
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Family Soboliphymatidae
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Family Subuluridae
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Family Thelastomatidae
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Family Toxocaridae
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