Ostracod valves tentatively identified as Ilyocypris leptolinea Wang & Zhai, sp. nov. from the late Quaternary Xiaojinggou section of Inner Mongolia, China A–D XJG2-203-1, adult right valve A exterior view B interior view C interior view of the antero-ventral part, showing three inner lists (arrowed) D interior view of the postero-ventral part E XJG2-193-4, right valve of A-1 juvenile, exterior view F–H XJG2-199-1, left valve of A-1 juvenile F interior view G interior view of the postero-ventral part, showing the marginal ripplets H interior view of the antero-ventral part, showing the marginal ripplets. Scale bars: 200 μm (A, B, E, F); 100 μm (C, D, G, H).