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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Class Adenophorea
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Subclass Chromadoria
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Order Desmodorida
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Family Monoposthiidae
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Genus Monoposthia
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Species Monoposthia arctica
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Species Monoposthia costata
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Species Monoposthia duodecimalata
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Species Monoposthia grahami
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Species Monoposthia hexalata
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Species Monoposthia latiannulata
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Species Monoposthia mirabilis
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Species Monoposthia ornata
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Species Monoposthia pacifica
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Species Monoposthia paramediterranea
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