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| Sounds | |
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Kingdom Animalia (animals)
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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Phylum Nematoda (nematodes)
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Class Adenophorea
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Subclass Enoplia
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Order Enoplida-



Family Trefusiidae-



Genus Trefusia-



Species Trefusia axonolaimoides -



Species Trefusia cornea -



Species Trefusia filicauda -



Species Trefusia filum -



Species Trefusia helgolandica -



Species Trefusia litoralis -



Species Trefusia longicauda -



Species Trefusia magna -



Species Trefusia obtusicaudata -



Species Trefusia varians -



Species Trefusia zostericola
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Confused by a class within a class or an order within an order? Please see our brief essay.
Scientific names for Aves taxonomy (family and below) are from The Howard and Moore Complete Checklist of the Birds of the World, Princeton University Press, copyright 2003. Used by permission.



