On the species status of Blattella germanica and Blattella asahinai (Blattodea, Blattellidae), and other morphologically similar species

Comparative morphology of B. germanica and B. asahinai. A–J, U. B. germanica; K–T, V. B. asahinai. A. Habitus, dorsal view; B. Habitus, ventral view; C. Head, ventral view; D. Abdominal tergite 7, ventral view; E. Dorsal glands, dorsal view; F. Supra-anal plate, ventral view; G. Pronotum, dorsal view; H. Abdominal tergite 8, ventral view; I. Phallomere; J. Subgenital plate, ventral view; K. Habitus, dorsal view; L. Habitus, ventral view; M. Head, ventral view; N. Abdominal tergite 7, ventral view; O. Dorsal glands, dorsal view; P. Supra-anal plate, ventral view; Q. Pronotum, dorsal view; R. Abdominal tergite 8, ventral view; S. Phallomere; T. Subgenital plate, ventral view; U, V. Female external genitalia. Scale bars: 5 mm (A, B, K, L); 1 mm (C, F, G, I, J, M, P, Q, S–V); 0.5 mm (D, E, H, N, O, R). 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.