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