Kerria nepalensis scanning electron micrographs A anal ring setae B anal tubercle and dorsal spine C perivulvar pore cluster D magnified single perivulvar pore E brachia F brachial plate with dimples G anterior spiracle H a marginal duct cluster I a magnified marginal duct cluster J antenna K dorsal spine L mouthparts. Scale bars: 10 µm (D), 30 µm (I, J), 100 µm (A, F, L), 200 µm (G, H, K), 300 µm (E), 500 µm (B, C).