Difference and similarity between four sets of wings. Line drawings of holotypes. A Sinonemestrius completus sp. n., B Sinonemestrius tuanwangensis Hong & Wang, 1990 (after Hong and Wang 1990), C Sinonemestrius akirai Jarzembowski & Mostovski, 2000 (after Jarzembowski and Mostovski 2000), D Ahirmoneura neimengguensis K-y Zhang et al., 2008 (after K-y Zhang et al. 2008). Scale bars: 1 mm.