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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 Gastropoda
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Order Basommatophora
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Family Physidae
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Genus Physella
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Species Physella acuta
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Species Physella ancillaria
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Species Physella bermudezi
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Species Physella bottimeri
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Species Physella boucardi
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Species Physella columbiana
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Species Physella conoidea
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Species Physella cooperi
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Species Physella costata
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Species Physella cubensis
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Species Physella globosa
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Species Physella gyrina
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Species Physella hendersoni
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Species Physella heterostropha
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Species Physella hordacea
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Species Physella humerosa
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Species Physella integra
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Species Physella johnsoni
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Species Physella lordi
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Species Physella magnalacustris
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Species Physella mexicana
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Species Physella microstriata
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Species Physella osculans
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Species Physella parkeri
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Species Physella propinqua
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Species Physella sayi
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Species Physella spelunca
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Species Physella squalida
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Species Physella traski
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Species Physella utahensis
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Species Physella vinosa
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Species Physella virgata
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Species Physella virginea
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Species Physella wrighti
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Species Physella zionis
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