Order Decapoda
(crabs, shrimp, and relatives)

Confused by a class within a class or an order within an order? Please see our brief essay.

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 Decapoda (crabs, shrimp, and relatives)
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  Suborder Dendrobranchiata
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  Superfamily Penaeoidea (penaeoid shrimps)
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  Family Aristeidae (gamba prawns and gamba shrimps)
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  Family Benthesicymidae (benthesicymid shrimps)
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  Family Penaeidae (penaeid shrimps)
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  Family Sicyoniidae (rock shrimps)
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  Family Solenoceridae (solenocerid shrimps)
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  Superfamily Sergestoidea
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  Family Luciferidae
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  Family Sergestidae
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  Suborder Pleocyemata
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  Infraorder Anomura
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  Family Aeglidae
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  Family Albuneidae (mole crabs)
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  Family Callianassidae (ghost shrimps)
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  Family Chirostylidae
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  Family Coenobitidae (land hermit crabs)
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  Family Ctenochelidae
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  Family Diogenidae (left-handed hermit crabs)
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  Family Galatheidae (squat lobsters)
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  Superfamily Galatheoidea
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  Family Hippidae (sand crabs)
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  Superfamily Hippoidea
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  Family Laomediidae
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  Family Lithodidae (stone and king crabs)
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  Family Lomidae
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  Family Paguridae (right-handed hermit crabs)
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  Superfamily Paguroidea
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  Family Parapaguridae (deepwater hermit crabs)
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  Family Porcellanidae (porcelain crabs)
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  Family Pylochelidae
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  Family Thalassinidae
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  Family Upogebiidae (mud shrimps)
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  Infraorder Astacidea
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  Superfamily Astacoidea
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  Family Astacidae (crayfishes)
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  Family Austroastacidae
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  Family Cambaridae (cambarid crayfish and crayfishes)
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  Family Enoplometopidae
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  Family Parastacidae
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  Superfamily Nephropoidea
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  Family Nephropidae (clawed lobsters)
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  Family Thaumastochelidae
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  Infraorder Brachyura
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  Superfamily Cancroidea
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  Family Atelecyclidae (horse crabs)
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  Family Cancridae (rock crabs)
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  Family Corystidae
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  Family Pirimelidae
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  Family Thiidae
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  Superfamily Cryptochiroidea
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  Family Cryptochiridae (gall crabs)
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  Family Cyclodorippidae
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  Superfamily Cyclodorippoidea
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  Family Cymonomidae
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  Superfamily Dorippoidea
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  Family Dorippidae (sumo crabs)
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  Superfamily Dromioidea
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  Family Dromiidae (sponge crabs)
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  Family Dynomenidae
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  Family Homolodromiidae
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  Family Eumedonidae
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  Superfamily Grapsoidea
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  Family Gecarcinidae (land crabs)
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  Family Grapsidae (marsh crabs, shore crabs, and talon crabs)
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  Superfamily Homoloidea
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  Family Homolidae (carrier crabs)
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  Family Latreilliidae
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  Family Hymenosomidae
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  Superfamily Leucosioidea
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  Family Calappidae (box crabs)
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  Family Leucosiidae (purse crabs)
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  Superfamily Majoidea
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  Family Majidae (spider crabs)
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  Family Mimilambridae
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  Superfamily Ocypodoidea
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  Family Ocypodidae (fiddler crabs and ghost crabs)
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  Family Palicidae (stilt crabs)
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  Family Retroplumidae
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  Superfamily Parthenopoidea
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  Family Parthenopidae (elbow crabs)
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  Superfamily Pinnotheroidea
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  Family Pinnotheridae (pea crabs)
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  Superfamily Portunoidea
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  Family Geryonidae (deepsea crabs)
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  Family Portunidae (swimming crabs)
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  Family Potamidae
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  Superfamily Raninoidea
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  Family Raninidae (frog crabs)
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  Family Sinopotamidae
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  Family Trapeziidae
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  Superfamily Xanthoidea
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  Family Goneplacidae
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  Family Xanthidae (mud crabs)
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  Infraorder Caridea
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  Family Alpheidae (snapping shrimps)
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  Superfamily Alpheoidea
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  Family Atyidae (basket shrimp)
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  Superfamily Atyoidea
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  Superfamily Bresiloidea
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  Family Agostocarididae
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  Family Alvinocarididae
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  Family Bresiliidae
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  Family Disciadidae
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  Genus Kirnasia
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  Family Pseudochelidae
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  Family Campylonotidae
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  Family Crangonidae
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  Superfamily Crangonoidea
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  Family Eugonatonotidae
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  Family Glyphocrangonidae (armored shrimps)
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  Family Gnathophyllidae (bumblebee shrimps)
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  Family Hippolytidae
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  Family Nematocarcinidae
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  Family Ogyrididae (longeye shrimps)
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  Family Oplophoridae (deepsea shrimps)
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  Superfamily Palaemonoidea
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  Family Palaemonidae
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  Family Pandalidae
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  Superfamily Pandaloidea
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  Family Pasiphaeidae (glass shrimps)
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  Superfamily Pasiphaeoidea
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  Family Physetocarididae
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  Family Pomatochelidae
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  Family Processidae (night shrimps)
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  Family Psalidopodidae (scissorfoot shrimps)
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  Superfamily Psalidopodoidea
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  Family Rhynchocinetidae
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  Superfamily Rhynchocinetoidea
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  Family Stylodactylidae
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  Superfamily Stylodactyloidea
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  Family Thalassocarididae
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  Infraorder Palinura
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  Superfamily Eryonoidea
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  Family Eryonidae
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  Family Palinuridae (spiny lobsters)
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  Superfamily Palinuroidea
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  Family Polychelidae
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  Family Scyllaridae (slipper lobsters)
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  Family Synaxidae (furry lobsters)
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  Infraorder Palinuridea
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  Superfamily Glypheoidea
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  Family Glypheidae
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  Infraorder Stenopodidea
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  Family Stenopodidae
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  Infraorder Thalassinidea
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  Family Axiidae (lobster shrimps)
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  Family Calocarididae
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  Suborder Reptantia