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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Chaetognatha (arrow worms)
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Class Not assigned
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Order Not assigned
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Family Spadellidae
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Genus Spadella
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Species Spadella angulata
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Species Spadella birostrata
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Species Spadella boucheri
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Species Spadella bradshawi
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Species Spadella cephaloptera
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Species Spadella equidentata
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Species Spadella gaetanoi
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Species Spadella lainezi
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Species Spadella ledoyeri
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Species Spadella moretonensis
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Species Spadella nunezi
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