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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 Monhysterida
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Family Monhysteridae
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Genus Mesotheristus
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Species Mesotheristus aegypticus
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Species Mesotheristus circumscriptus
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Species Mesotheristus dubius
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Species Mesotheristus erectus
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Species Mesotheristus fimbriatus
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Species Mesotheristus hirsutus
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Species Mesotheristus laxus
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Species Mesotheristus setifer
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Species Mesotheristus setosus
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Species Mesotheristus sphaerolaimus
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