Phylum : Arthropoda
Class : Crustacea
Sub class : Malacostraca
Series : Eumalacostraca
Super Order : Eucarida
Order : Decapoda
Infraorder : Brachyura
Family : Grapsidae
Sub Family : Varuninae
Genus : Ptychognathus
Species : altimanus
Authority : Rathbun
Year :
