Class Malacostraca
(crabs, krill, pill bugs, shrimp, and relatives)

Scientific names for Aves taxonomy (family and below) are from The Howard and Moore Complete Checklist of the Birds of the World, Princeton University Press, copyright 2003. Used by permission.

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  Kingdom Animalia (animals)
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  Eumetazoa (metazoans)
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  Bilateria (bilaterally symmetrical animals)
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  Protostomia (protostomes)
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  Ecdysozoa
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  Phylum Arthropoda (crustaceans, insects, spiders, and relatives)
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  Subphylum Crustacea (crustaceans)
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  Class Malacostraca (crabs, krill, pill bugs, shrimp, and relatives)
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  Subclass Eumalacostraca
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  Superorder Eucarida
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  Order Amphionidacea
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  Order Decapoda (crabs, shrimp, and relatives)
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  Order Euphausiacea (krill)
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  Superorder Pancarida
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  Superorder Peracarida
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  Order Amphipoda (amphipods)
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  Order Cumacea (cumaceans)
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  Order Isopoda (pillbugs and sowbugs)
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  Order Lophogastrida
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  Order Mysida
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  Order Spelaeogriphacea
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  Order Tanaidacea (tanaidaceans)
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  Order Thermosbaenacea
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  Superorder Syncarida
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  Order Anaspidacea
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  Subclass Hoplocarida
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  Order Stomatopoda (mantis shrimp)
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  Subclass Phyllocarida
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  Order Leptostraca