ecofactbook
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species
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Animalia
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Nematoda
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Secernentea
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Rhabditida
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Heligmosomidae
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Heligmosomum
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Heligmosomum borealis
Heligmosomum costellatum
Heligmosomum halli
Heligmosomum mixtum
Heligmosomum nearcticum
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Heligmosomum borealis