Neogammaropsis Stout, 1913 Elasmopus is a cosmopolitan[2] genus of amphipods in the family, Maeridae, and was first described in 1853 by Achille Costa.

[3][4] The type species is Elasmopus rapax Costa, 1853.

[3] There are 143 species accepted by WoRMS[1] Some appear below.