Female external genitalia of B. germanica and of its similar species. A. B. germanica; B. B. lituricolis; C. B. asahinai; D. B. bisignata; E. B. nipponica; F. B. sauteri; G. B. radicifera; H. B. punctoria; I. B. ligulata. Scale bars: 1 mm. Abbreviations: aa.-anterior arch; bsv.-basivalvula; cp.-crosspiece; intc.s.-intercalary sclerite; p.l.-posterior lobes of valvifer II; pp.-paraprocts; pt.-paratergites; SVII-sternum VII; T I–X-abdominal tergites I–X; v.I, II, III- valvules I–III; vlf.I-first valvifer; vlf.Ia-first valvifer arm; vst.s.-vestibular sclerite; and sp.pl.-spermathecal plate.

 
 
  Part of: Cai J-Z, Yao W-W, Wang Z-Q, Che Y-L (2025) On the species status of Blattella germanica and Blattella asahinai (Blattodea, Blattellidae), and other morphologically similar species. ZooKeys 1250: 155-188. https://doi.org/10.3897/zookeys.1250.145981