Gammarus locusta

Super Group: 
Opisthokonta
Phylum: 
Arthropoda
Sub-Phylum: 
Crustacea
Class: 
Malacostraca
Sub-Class: 
Eumalacostraca
Order: 
Amphipoda
Sub-Order: 
Senticaudata
Family: 
Gammaridae
Genus: 
Gammarus
Species: 
locusta
Authority: 
Linnaeus 1758