Infraorder Brachyura

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.

• Parent taxa
  
  
  
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  Suborder Pleocyemata
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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)