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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Tardigrada (water bears)
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Class Heterotardigrada
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Order Arthrotardigrada
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Family Stygarctidae
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Genus Stygarctus
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Species Stygarctus abornatus
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Species Stygarctus bradypus
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Species Stygarctus gourbaultae
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Species Stygarctus granulatus
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Species Stygarctus lambertii
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Species Stygarctus spinifer
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