Genital segments of Nipponeurorthus spp. a–f Nipponeurorthus multilineatus Nakahara a–c male: a lateral b ventral c dorsal d–f female: d lateral e gonocoxites 8 and gonapophyses 8, ventral f bursa copulatrix, ventral g–j Nipponeurorthus pallidinervis Nakahara g–i male paratype: g lateral h ventral i dorsocaudal j–l female paratype: j lateral k gonocoxites 8 and gonapophyses 8, ventral l bursa copulatrix. Abbreviations. b – bursa copulatrix; e – ectoproct; g – ring of glands; gp – gonapophysis; gs – gonostylus; gx – gonocoxite; S – sternite; T – tergite. Scale bars: 0.5 mm.