Fig. 9 in A general theory of genital homologies for the Hexapoda (Pancrustacea) derived from skeletomuscular correspondences, with emphasis on the Endopterygota

Fig. 9. Genital skeletomusculature of Ilybius biguttulus (Coleoptera:Dytiscidae). AeD, genitalia in situ: A, dorsal; B, dorsolateral oblique; C, ventral; D, dorsal, tergal-coxital muscles removed.EeG, genitalia and anterior fragment of sternum IX (sternal apodeme): E, ventral; F, ventral,sternal muscle removed;G, dorsal.H, coxital-stylar composite sclerites spread away from coxopenis (composite of second coxites and penis, CxtII þ Pen), dorsolateral oblique. I, coxopenis, left side, lateral. Abbreviations: CxtI þ Sty ¼ coxostylar composite sclerite; CstII þ Pen ¼ coxopenial composite; Endscl ¼ endophallic sclerite; StIX ¼ sternum IX; Stap ¼ sternal apodeme; Styapd ¼ stylar apodeme; TgIX ¼ tergum IX. Muscle abbreviations indicated in Table 1.