Male (XUX-2013–228) and female (31–32 XUX-2012–302 and 33–34 XUX-2012–364) genital anatomy of Ryuthela ishigakiensis Haupt, 1983, Ryuthela nishihirai (Haupt, 1979), and Ryuthela sasakii Ono, 1997, respectively. 28 palp prolateral view 29 palp ventral view 30 palp retrolateral view 31, 33 vulva ventral view 32, 34 vulva dorsal view. Scales 0.5 mm.

 
 
  Part of: Xin X, Liu F, Chen J, Ono H, Li D, Kuntner M (2015) A genus-level taxonomic review of primitively segmented spiders (Mesothelae, Liphistiidae). ZooKeys 488: 121-151. https://doi.org/10.3897/zookeys.488.8726