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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Order Coleoptera
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Superfamily Hydrophiloidea
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Family Helophoridae
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Genus Helophorus
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Species Helophorus alternatus
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Species Helophorus angusticollis
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Species Helophorus aquaticus
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Species Helophorus arcticus
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Species Helophorus artus
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Species Helophorus auricollis
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Species Helophorus brevipalpis
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Species Helophorus browni
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Species Helophorus californicus
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Species Helophorus chamberlaini
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Species Helophorus columbianus
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Species Helophorus cuspifer
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Species Helophorus eclectus
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Species Helophorus fenderi
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Species Helophorus fortis
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Species Helophorus frosti
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Species Helophorus furius
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Species Helophorus grandis
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Species Helophorus granularis
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Species Helophorus hatchi
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Species Helophorus inflectus
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Species Helophorus lacustris
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Species Helophorus latipenis
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Species Helophorus lecontei
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Species Helophorus ledatus
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Species Helophorus leechi
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Species Helophorus linearis
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Species Helophorus linearoides
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Species Helophorus lineatus
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Species Helophorus marginicollis
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Species Helophorus nitiduloides
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Species Helophorus nitidulus
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Species Helophorus oblongus
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Species Helophorus obscurus
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Species Helophorus orchymonti
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Species Helophorus oregonus
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Species Helophorus orientalis
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Species Helophorus parasplendidus
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Species Helophorus robertsi
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Species Helophorus schuhi
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Species Helophorus sempervarians
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Species Helophorus sibiricus
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Species Helophorus smetanai
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Species Helophorus splendidus
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Species Helophorus tuberculatus
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