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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 Actinonaias
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Genus Alasmidonta
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Genus Amblema
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Genus Anodonta
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Genus Anodontoides
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Genus Arcidens
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Genus Arkansia
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Genus Cyclonaias
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Genus Cyprogenia
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Genus Cyrtonaias
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Genus Disconaias
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Genus Dromus
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Genus Dysnomia
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Genus Ellipsaria
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Genus Elliptio
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Genus Elliptoideus
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Genus Epioblasma
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Genus Fusconaia
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Genus Glebula
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Genus Gonidea
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Genus Hemistena
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Genus Lampsilis
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Genus Lasmigona
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Genus Lemiox
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Genus Leptodea
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Genus Lexingtonia
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Genus Ligumia
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Genus Medionidus
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Genus Megalonaias
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Genus Obliquaria
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Genus Obovaria
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Genus Pegias
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Genus Plectomerus
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Genus Plethobasus
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Genus Pleurobema
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Genus Popenaias
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Genus Popenais
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Genus Potamilus
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Genus Proptera
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Genus Ptychobranchus
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Genus Pyganodon
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Genus Quadrula
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Genus Quincuncina
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Genus Simpsonaias
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Genus Strophitus
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Genus Toxolasma
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Genus Tritogonia
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Genus Truncilla
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Genus Uniomerus
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Genus Utterbackia
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Genus Venustaconcha
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Genus Villosa
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