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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 Bathybelosidae
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Family Eukrohniidae
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Family Krohnitelldae
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Family Krohnittellidae
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Family Krohnittidae
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Family Pterokrohniidae
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Family Pterosagittidae
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Family Sagittidae
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Family Spadellidae
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Family Spengelidae
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Family Torquatoridae
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