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Cancroidea is a superfamily of crabs, comprising the families Atelecyclidae and Cancridae.[1] Four other families have been separated into new superfamilies: Cheiragonidae into Cheiragonoidea, Corystidae into Corystoidea, and both Pirimelidae and Thiidae into Portunoidea.[2] Montezumellidae has been moved from Cancroidea to his own Superfamily Montezumelloidea.[3]

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