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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Mollusca (clams, snails, squids, and relatives)
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Class Bivalvia
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Order Unionoida
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Family Unionidae
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Genus Quadrula
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Species Quadrula apiculata
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Species Quadrula asperata
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Species Quadrula aurea
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Species Quadrula couchiana
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Species Quadrula cylindrica
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Species Quadrula fragosa
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Species Quadrula houstonensis
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Species Quadrula intermedia
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Species Quadrula metanevra
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Species Quadrula nodulata
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Species Quadrula petrina
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Species Quadrula pustulosa
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Species Quadrula quadrula
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Species Quadrula refulgens
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Species Quadrula rumphiana
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Species Quadrula sparsa
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Species Quadrula stapes
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Species Quadrula tuberosa
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