Plagusiidae

Plagusiidae
Percnon gibbesi
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Class:	Malacostraca
Order:	Decapoda
Infraorder:	Brachyura
Superfamily:	Grapsoidea
Family:	Plagusiidae Dana, 1851
Genera
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The Plagusiidae are a family of crabs, formerly treated as a subfamily of the family Grapsidae, but have since been considered sufficiently distinct to be a family in their own right. The Plagusiidae family includes the Plagusiinae subfamily, comprising the genera Percnon and Plagusia, which constitute a widespread group of litophilic, intertidal and subtidal crabs that are notorius for their speed and their agility.

Six genera are included in the family:

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Wikipedia