Gammarus zaddachi, Sexton, 1912

Vader, Wim & Tandberg, Anne Helene Solberg, 2019, Gammarid amphipods (Crustacea) in Norway, with a key to the species, Fauna norvegica 39, pp. 12-25 : 18

C. The Gammarus zaddachi group

The three species G. zaddachi , G. salinus and G. wilkitzkii appear to be closely related morphologically, zoogeographically and ecologically; however, the ‘under-ice high-arctic’ G. wilkitzkii seems quite different from the other two, that are confined to a quite restricted area in northwestern Europe: south to western France ( Bretagne). All three are basically brackish water species. G. zaddachi and G. salinus are easily recognized compared to the species in groups A and B because of their colour pattern; they have a clear pattern of transverse dark stripes on a light brown background.