Keys for Genus Gammarus

Eyes present

Accessory flagellum on antenna 1 present

Urosome I and II without dorsal tubercles

Basipodite of peraeopod V same width as peraeopod IV (the basis of the last two legs).

Dorsal surface of urosome segments armed with a group of spines.

Uropod III: inner ramus 40-100 % of the length of the outer ramus

THE LAUTERBACH TAUNUS BENTHOS REPORT

Genus Gammarus

This was the most abundant species I found here. Gammarus were everywhere, under stones, swimming in still water pools. Clearly the dominant water bug, at least in this period of the year.