Antennal scale 4 times as long as broad. Exopod of 4th male pleopod with distal 3 segments of equal length. Telson with apex slightly emarginate; lateral margins slightly concave; number of spines of lateral and apical margins is about 50.
Ref.: da Costa (1964), Brattegard (1969).
Kingdom Animalia Phylum Crustacea Superorder Peracarida Order Mysidacea Suborder Mysida Family Mysidae Subfamily Mysinae Tribe Erythropini Genus Mysidium Species Mysidium gracile
