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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Lophophorates (lophophorates)
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Brachiopoda (lamp-shells)
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Class Rhynchonellata
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Order Terebratulida
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Family Aulacothyropsidae
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Family Bouchardiidae
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Family Cancellothyrididae
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Family Chlidonophoridae
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Family Cnismatocentridae
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Family Dallinidae
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Family Dyscoliidae
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Family Frenulinidae
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Family Gwynioidea
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Family Kingenidae
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Family Kraussinidae
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Family Laqueidae
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Family Megathyrididae
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Family Not assigned
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Family Platidiidae
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Family Terebrataliidae
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Family Terebratellidae
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Family Terebratulidae
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Family Thaumatosiidae
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Family Zeilleriidae
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