Tags: Crustacean.
Gammarus obruki is a species of freshwater amphipod collected from İnderesi Cave Bartın Province Turkey. This species belongs to the Gammarus pulex-group. The most discriminant characters of this species are the presence of prolonged extremities including a very long antennae up to 52 segmented flagella a densely setose fifth peduncle l flagellar segments of antenna and a fourth peduncle segment that has no long setae.