Megamphopus Norman, 1869

Bakir, Kerem, Sezgin, Murat & Myers, Alan A., 2011, A new species of amphipod, Megamphopus katagani sp. nov. (Crustacea: Peracarida: Photidae) from the Sea of Marmara (Turkey), with a key to the species of Megamphopus in the North Atlantic, Mediterranean and associated Seas, Zootaxa 2791, pp. 63-67 : 64

Megamphopus Norman, 1869

Diagnosis. Head with lateral lobes strongly produced, subocular margin strongly recessed. Mandible palp article 3 spatulate, shorter than article 2. Antenna 1 peduncle article 3 longer than article 1; accessory flagellum very small but distinct. Coxa 2 the largest, especially in male; coxae 3–7 relatively shallow. Gnathopods subchelate; male gnathopod 2 greatly enlarged. Uropod 3 rami longer than peduncle. Telson broad with a strong robust seta on each lateral crest.

Remarks. Megamphopus can be distinguished from all other genera within the Gammaropsis –group of genera, by its differentially enlarged male gnathopod 2 coxa.