Gammarus mosuo Hou & Li, sp. n., male holotype. A head B antenna I C flagellar article of antenna I with aesthetasc D antenna II E upper lip F lower lip G left mandible H incisor and lacinia mobilis of right mandible I left maxilla I J distal part of palp article II of right maxilla I K maxilla II L maxilliped M epimeral plate I N epimeral plate II O epimeral plate III.